TY  - CONF
AU  - Radojević, Rade L.
AU  - Petrović, Dragan V.
AU  - Mileusnić, Zoran I.
AU  - Petrović, Srbobran
AU  - Đokić, Dragoslav
PY  - 2023
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6748
AB  - This paper analyzes the problems related to the reconstruction of a semi-mounted
berry harvester into a self-propelled one specified for exploitation on smaller orchards. The
components of the self-propelled machine, their purpose and mutual functional connection are
described in details, which retained the principle of unilateral picking of half the row of bush
berries from its semi-mounted predecessor. Among the most important general design features,
the following stand out in particular: the drive of the harvester working components, which is
achieved by means of appropriate combinations of hydraulic and mechanical power transmissions,
which allows it to be highly adaptable to different working conditions on the terrain, and the
control device, which is designed to maintain the movement of the machine in the direction set
by the driver, without decreasing the safety and passability requirements of the machine itself.
In the technology of berry fruit production in the Republic of Serbia, the harvesting process is
still the basic limiting factor. Manual picking participates as much as 75% in total production
costs. The costs of mechanical harvesting are between 2.05 and 2.27 times lower in comparison
to manual picking, depending on whether the machine is a towed or self-propelled. The paper
also provides a comprehensive analysis of the energy parameters of work for both versions of
the harvester. The results indicate that power losses on rolling and slipping are lower in the
self-propelled version 10 and 40%, respectively, while in the semi-mounted version the power lost
on the climb is 60-70% lower compared to the self-propelled version. As the harvesting process
is still a limiting factor in berry fruit production, in addition to reducing costs by applying
mechanized solutions, one of the goals of the work is the optimization of applied technical
solutions for the same.
PB  - University of Belgrade, Faculty of Agriculture, Serbia
C3  - The 6rd International Symposium on Agricultural Engineering, ISAE-2023, 19-21 October, Belgrade Serbia
T1  - Development of a self-propelled barries fruit harvester
SP  - 25
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_6748
ER  - 

@conference{
author = "Radojević, Rade L. and Petrović, Dragan V. and Mileusnić, Zoran I. and Petrović, Srbobran and Đokić, Dragoslav",
year = "2023",
abstract = "This paper analyzes the problems related to the reconstruction of a semi-mounted
berry harvester into a self-propelled one specified for exploitation on smaller orchards. The
components of the self-propelled machine, their purpose and mutual functional connection are
described in details, which retained the principle of unilateral picking of half the row of bush
berries from its semi-mounted predecessor. Among the most important general design features,
the following stand out in particular: the drive of the harvester working components, which is
achieved by means of appropriate combinations of hydraulic and mechanical power transmissions,
which allows it to be highly adaptable to different working conditions on the terrain, and the
control device, which is designed to maintain the movement of the machine in the direction set
by the driver, without decreasing the safety and passability requirements of the machine itself.
In the technology of berry fruit production in the Republic of Serbia, the harvesting process is
still the basic limiting factor. Manual picking participates as much as 75% in total production
costs. The costs of mechanical harvesting are between 2.05 and 2.27 times lower in comparison
to manual picking, depending on whether the machine is a towed or self-propelled. The paper
also provides a comprehensive analysis of the energy parameters of work for both versions of
the harvester. The results indicate that power losses on rolling and slipping are lower in the
self-propelled version 10 and 40%, respectively, while in the semi-mounted version the power lost
on the climb is 60-70% lower compared to the self-propelled version. As the harvesting process
is still a limiting factor in berry fruit production, in addition to reducing costs by applying
mechanized solutions, one of the goals of the work is the optimization of applied technical
solutions for the same.",
publisher = "University of Belgrade, Faculty of Agriculture, Serbia",
journal = "The 6rd International Symposium on Agricultural Engineering, ISAE-2023, 19-21 October, Belgrade Serbia",
title = "Development of a self-propelled barries fruit harvester",
pages = "25",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_6748"
}

Radojević, R. L., Petrović, D. V., Mileusnić, Z. I., Petrović, S.,& Đokić, D.. (2023). Development of a self-propelled barries fruit harvester. in The 6rd International Symposium on Agricultural Engineering, ISAE-2023, 19-21 October, Belgrade Serbia
University of Belgrade, Faculty of Agriculture, Serbia., 25.
https://hdl.handle.net/21.15107/rcub_agrospace_6748

Radojević RL, Petrović DV, Mileusnić ZI, Petrović S, Đokić D. Development of a self-propelled barries fruit harvester. in The 6rd International Symposium on Agricultural Engineering, ISAE-2023, 19-21 October, Belgrade Serbia. 2023;:25.
https://hdl.handle.net/21.15107/rcub_agrospace_6748 .

Radojević, Rade L., Petrović, Dragan V., Mileusnić, Zoran I., Petrović, Srbobran, Đokić, Dragoslav, "Development of a self-propelled barries fruit harvester" in The 6rd International Symposium on Agricultural Engineering, ISAE-2023, 19-21 October, Belgrade Serbia (2023):25,
https://hdl.handle.net/21.15107/rcub_agrospace_6748 .

TY  - CONF
AU  - Mileusnić, Zoran I.
AU  - Petrović, Dragan V.
AU  - Stanisavljević, Rade
AU  - Đokić, Dragoslav
AU  - Radojević, Rade L.
PY  - 2023
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6775
AB  - In agricultural production, sowing is one of the most important agro-technical
operations that influence the quality of the product and yield. The crops sowing quality, including wheat, depends on properly prepared soil, that is, on the quality of soil cultivation.
However, despite well-executed soil cultivation, satisfactory results cannot always be achieved if
sowing is not done in an appropriate manner. The achieved depth of sowing affects the speed of
sprouting, rooting, resistance of plants to low temperature and drought, intensity of budding,
growth and development, and achieving the highest yield in certain conditions. In unfavorable
agro-technical conditions, and especially in the conditions of dry farming, optimal conditions for
high-quality sowing often cannot be ensured by applying the conventional method. Therefore,
new cultivation and sowing systems are being applied in order to perform high-quality sowing
in time. During the experiment, the influences of the tillage system and sowing method on the
sowing depth and the depth of the formation of the tillering nodes were registered. The results
of two-year study are given, where four methods of tillage were applied, namely conventional
tillage at depths of up to 25 cm and three reduced tillage methods at different depths. Reduced cultivation with a discc harrrow was done at a depths between 8 and 12 cm, and reduced
cultivation with rototiller was done at depths of 5-10 cm and 10-15 cm. During the tests, the
sowing depth and the depths of the tillering nodes were determined by direct measuring of the
knots positions of the analyzed plants. Furthermore, it was verified that depth of the knot
has a significant effect on the resistance of wheat to low temperatures during winter and lack
of moisture during summer droughts. Achieved results enable further optimization of applied
cultivation and sowing systems.
PB  - University of Belgrade, Faculty of Agriculture, Serbia
C3  - The 6rd International Symposium on Agricultural Engineering, ISAE-2023, 19-21 October, Belgrade Serbia,
T1  - The influence of tillage system on the wheat sowing quality
SP  - 2
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_6775
ER  - 

@conference{
author = "Mileusnić, Zoran I. and Petrović, Dragan V. and Stanisavljević, Rade and Đokić, Dragoslav and Radojević, Rade L.",
year = "2023",
abstract = "In agricultural production, sowing is one of the most important agro-technical
operations that influence the quality of the product and yield. The crops sowing quality, including wheat, depends on properly prepared soil, that is, on the quality of soil cultivation.
However, despite well-executed soil cultivation, satisfactory results cannot always be achieved if
sowing is not done in an appropriate manner. The achieved depth of sowing affects the speed of
sprouting, rooting, resistance of plants to low temperature and drought, intensity of budding,
growth and development, and achieving the highest yield in certain conditions. In unfavorable
agro-technical conditions, and especially in the conditions of dry farming, optimal conditions for
high-quality sowing often cannot be ensured by applying the conventional method. Therefore,
new cultivation and sowing systems are being applied in order to perform high-quality sowing
in time. During the experiment, the influences of the tillage system and sowing method on the
sowing depth and the depth of the formation of the tillering nodes were registered. The results
of two-year study are given, where four methods of tillage were applied, namely conventional
tillage at depths of up to 25 cm and three reduced tillage methods at different depths. Reduced cultivation with a discc harrrow was done at a depths between 8 and 12 cm, and reduced
cultivation with rototiller was done at depths of 5-10 cm and 10-15 cm. During the tests, the
sowing depth and the depths of the tillering nodes were determined by direct measuring of the
knots positions of the analyzed plants. Furthermore, it was verified that depth of the knot
has a significant effect on the resistance of wheat to low temperatures during winter and lack
of moisture during summer droughts. Achieved results enable further optimization of applied
cultivation and sowing systems.",
publisher = "University of Belgrade, Faculty of Agriculture, Serbia",
journal = "The 6rd International Symposium on Agricultural Engineering, ISAE-2023, 19-21 October, Belgrade Serbia,",
title = "The influence of tillage system on the wheat sowing quality",
pages = "2",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_6775"
}

Mileusnić, Z. I., Petrović, D. V., Stanisavljević, R., Đokić, D.,& Radojević, R. L.. (2023). The influence of tillage system on the wheat sowing quality. in The 6rd International Symposium on Agricultural Engineering, ISAE-2023, 19-21 October, Belgrade Serbia,
University of Belgrade, Faculty of Agriculture, Serbia., 2.
https://hdl.handle.net/21.15107/rcub_agrospace_6775

Mileusnić ZI, Petrović DV, Stanisavljević R, Đokić D, Radojević RL. The influence of tillage system on the wheat sowing quality. in The 6rd International Symposium on Agricultural Engineering, ISAE-2023, 19-21 October, Belgrade Serbia,. 2023;:2.
https://hdl.handle.net/21.15107/rcub_agrospace_6775 .

Mileusnić, Zoran I., Petrović, Dragan V., Stanisavljević, Rade, Đokić, Dragoslav, Radojević, Rade L., "The influence of tillage system on the wheat sowing quality" in The 6rd International Symposium on Agricultural Engineering, ISAE-2023, 19-21 October, Belgrade Serbia, (2023):2,
https://hdl.handle.net/21.15107/rcub_agrospace_6775 .

Radojević, R. L., Petrović, D. V., Mileusnić, Z. I., Barać, S.,& Vuković, A.. (2023). Rekonstrukcija polunošenog kombajna za ubiranje jagodastog voća u samohodni za mala i srednja poljoprivredna gazdinstva. in MNO za Mašinstvo i industrijski softver
MINISTARSTVO PROSVETE, NAUKE I TEHNOLOŠKOG RAZVOJA REPUBLIKE SRBIJE., 1-31.
https://hdl.handle.net/21.15107/rcub_agrospace_6744

Radojević RL, Petrović DV, Mileusnić ZI, Barać S, Vuković A. Rekonstrukcija polunošenog kombajna za ubiranje jagodastog voća u samohodni za mala i srednja poljoprivredna gazdinstva. in MNO za Mašinstvo i industrijski softver. 2023;:1-31.
https://hdl.handle.net/21.15107/rcub_agrospace_6744 .

Radojević, Rade L., Petrović, Dragan V., Mileusnić, Zoran I., Barać, Saša, Vuković, Aleksandar, "Rekonstrukcija polunošenog kombajna za ubiranje jagodastog voća u samohodni za mala i srednja poljoprivredna gazdinstva" in MNO za Mašinstvo i industrijski softver (2023):1-31,
https://hdl.handle.net/21.15107/rcub_agrospace_6744 .

TY  - JOUR
AU  - Mileusnić, Zoran I.
AU  - Saljnikov, Elmira
AU  - Radojević, Rade L.
AU  - Petrović, Dragan V.
PY  - 2022
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6028
AB  - Tillage involves various complex mechanisms of mechanical disturbance of the soil, aimed to advance its physical structure by creating relevant conditions for growing crops Quality regulation of every specific tillage conception is critical for the soil physical parameters. Thus, the main goal of this work was to review approaches to the analysis of the quality of soil cultivation techniques. Relationships have been established between the basic operating parameters of the mechanization applied and the consequent particle size spreading of the soil. Supplementary, statistical indices of the distribution pattern of soil particles, based on higher-order dimensionless statistical parameters were estimated. The observed mass distributions of soil aggregates was the result of extremely complex and superimposed influences of soil type, field conditions, crop structure, equipment used, etc. At this stage, an accurate forecast of the impact of soil tillage techniques on the changes in composition and size distribution of soil aggregates based on mathematical modelling is very difficult. Further research will be continued to include wider range of soil types, agricultural mechanization systems and their operational regimes.
PB  - Elsevier Ltd
T2  - Journal of Terramechanics
T1  - Soil compaction due to agricultural machinery impact
EP  - 60
SP  - 51
VL  - 100
DO  - 10.1016/j.jterra.2021.12.002
ER  - 

@article{
author = "Mileusnić, Zoran I. and Saljnikov, Elmira and Radojević, Rade L. and Petrović, Dragan V.",
year = "2022",
abstract = "Tillage involves various complex mechanisms of mechanical disturbance of the soil, aimed to advance its physical structure by creating relevant conditions for growing crops Quality regulation of every specific tillage conception is critical for the soil physical parameters. Thus, the main goal of this work was to review approaches to the analysis of the quality of soil cultivation techniques. Relationships have been established between the basic operating parameters of the mechanization applied and the consequent particle size spreading of the soil. Supplementary, statistical indices of the distribution pattern of soil particles, based on higher-order dimensionless statistical parameters were estimated. The observed mass distributions of soil aggregates was the result of extremely complex and superimposed influences of soil type, field conditions, crop structure, equipment used, etc. At this stage, an accurate forecast of the impact of soil tillage techniques on the changes in composition and size distribution of soil aggregates based on mathematical modelling is very difficult. Further research will be continued to include wider range of soil types, agricultural mechanization systems and their operational regimes.",
publisher = "Elsevier Ltd",
journal = "Journal of Terramechanics",
title = "Soil compaction due to agricultural machinery impact",
pages = "60-51",
volume = "100",
doi = "10.1016/j.jterra.2021.12.002"
}

Mileusnić, Z. I., Saljnikov, E., Radojević, R. L.,& Petrović, D. V.. (2022). Soil compaction due to agricultural machinery impact. in Journal of Terramechanics
Elsevier Ltd., 100, 51-60.
https://doi.org/10.1016/j.jterra.2021.12.002

Mileusnić ZI, Saljnikov E, Radojević RL, Petrović DV. Soil compaction due to agricultural machinery impact. in Journal of Terramechanics. 2022;100:51-60.
doi:10.1016/j.jterra.2021.12.002 .

Mileusnić, Zoran I., Saljnikov, Elmira, Radojević, Rade L., Petrović, Dragan V., "Soil compaction due to agricultural machinery impact" in Journal of Terramechanics, 100 (2022):51-60,
https://doi.org/10.1016/j.jterra.2021.12.002 . .

TY  - JOUR
AU  - Tadić, Vjekoslav
AU  - Tomantschger, Kurt
AU  - Petrović, Dragan V.
AU  - Radojević, Rade L.
AU  - Radivojević, Dušan Ž.
PY  - 2022
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6213
AB  - The article is focused on the behaviour of the basic properties of dairy cow's solid manure over the maturation period. The manure was exposed to mechanized aerobic processing by mechanically turning-over. Performed analysis comprehended measurements of mass participation percentages of organic components, mineral matters, H2O, N, P2O5 and K2O, as well as measurements of PH-values during the seven weeks of supervised test period of effective aerobic preparation of the composting material. Through maturation, large growth of averaged mass percentages of nitrogen, phosphorous-pentoxide and potassium-oxide, more than triple in comparison to the initial levels in a fresh solid, has been verified. Following a possible common approach in the scientific and technical practice, an analytical semi-empirical approach was used in describing the changes over the time of manure properties during composting, supported by prototype of the machine Kompomat 1. Combining the analytical theory of diffusion partial differential equations and application of numerical methods to non-linear fitting of the experimental output data, it was verified that all acquired manure parameters follow an identical general exponential law (R2 all properties = 0,906-0,990; RMSEall properties = 0,010-2,544). Clear relationships between the values of basic parameters of solid manure under mechanized aerobic fermentation (y) and composting duration lap time (x) have been established. © 2022, Strojarski Facultet. All rights reserved.
T2  - Tehnicki Vjesnik
T2  - Tehnicki Vjesnik
T1  - Modelling the Compost Parameters During Mechanized Aerobic Fermentation
EP  - 1875
IS  - 6
SP  - 1868
VL  - 29
DO  - 10.17559/TV-20211122093219
ER  - 

@article{
author = "Tadić, Vjekoslav and Tomantschger, Kurt and Petrović, Dragan V. and Radojević, Rade L. and Radivojević, Dušan Ž.",
year = "2022",
abstract = "The article is focused on the behaviour of the basic properties of dairy cow's solid manure over the maturation period. The manure was exposed to mechanized aerobic processing by mechanically turning-over. Performed analysis comprehended measurements of mass participation percentages of organic components, mineral matters, H2O, N, P2O5 and K2O, as well as measurements of PH-values during the seven weeks of supervised test period of effective aerobic preparation of the composting material. Through maturation, large growth of averaged mass percentages of nitrogen, phosphorous-pentoxide and potassium-oxide, more than triple in comparison to the initial levels in a fresh solid, has been verified. Following a possible common approach in the scientific and technical practice, an analytical semi-empirical approach was used in describing the changes over the time of manure properties during composting, supported by prototype of the machine Kompomat 1. Combining the analytical theory of diffusion partial differential equations and application of numerical methods to non-linear fitting of the experimental output data, it was verified that all acquired manure parameters follow an identical general exponential law (R2 all properties = 0,906-0,990; RMSEall properties = 0,010-2,544). Clear relationships between the values of basic parameters of solid manure under mechanized aerobic fermentation (y) and composting duration lap time (x) have been established. © 2022, Strojarski Facultet. All rights reserved.",
journal = "Tehnicki Vjesnik, Tehnicki Vjesnik",
title = "Modelling the Compost Parameters During Mechanized Aerobic Fermentation",
pages = "1875-1868",
number = "6",
volume = "29",
doi = "10.17559/TV-20211122093219"
}

Tadić, V., Tomantschger, K., Petrović, D. V., Radojević, R. L.,& Radivojević, D. Ž.. (2022). Modelling the Compost Parameters During Mechanized Aerobic Fermentation. in Tehnicki Vjesnik, 29(6), 1868-1875.
https://doi.org/10.17559/TV-20211122093219

Tadić V, Tomantschger K, Petrović DV, Radojević RL, Radivojević DŽ. Modelling the Compost Parameters During Mechanized Aerobic Fermentation. in Tehnicki Vjesnik. 2022;29(6):1868-1875.
doi:10.17559/TV-20211122093219 .

Tadić, Vjekoslav, Tomantschger, Kurt, Petrović, Dragan V., Radojević, Rade L., Radivojević, Dušan Ž., "Modelling the Compost Parameters During Mechanized Aerobic Fermentation" in Tehnicki Vjesnik, 29, no. 6 (2022):1868-1875,
https://doi.org/10.17559/TV-20211122093219 . .

TY  - JOUR
AU  - Stanisavljević, Rade
AU  - Vuković, Aleksandar
AU  - Petrović, Dragan V.
AU  - Radojević, Rade L.
AU  - Barać, Saša
AU  - Mileusnić, Zoran
AU  - Tadić, Vjekoslav
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5925
AB  - This paper presents the tests results of three types of hay mowing machines (later in text: mowers), namely a self-propelled oscillatory mower-conditioner and two tractor-mounted mowers with oscillatory and rotary blades, used to mow alfalfa grown under dry land conditions in the region of central Serbia during three seasons in 2014, 2015 and 2016. Although characterized by older design, they are still commonly used at smaller and medium size farms in this region. Therefore, their optimal exploitation parameters are still of large importance for hay quality and production efficiency and sustainability. The exploitation parameters of all three mowers generally increased linearly with higher speeds, having high R2 values (over 0,8), with rare exceptions. The regression coefficients b clearly showed that the self-propelled mower-conditioner achieved maximum increase in production performance (b = 0,3606), compared with the oscillatory (b = 0,1158) and rotary mowers (b = 0,1414). Mower design had a significant (p ≤ 0,001) effect on cutting and chopping losses, production performance, and specific fuel consumption (p ≤ 0,05). The tests confirmed the superiority of the self-propelled mower over the two mowers aggregated with tractors.
PB  - Strojarski Facultet
T2  - Tehnicki Vjesnik
T1  - Efficiency of alfalfa hay mowing machines under the dryland conditions
EP  - 1510
IS  - 5
SP  - 1503
VL  - 28
DO  - 10.17559/TV-20200720092823
ER  - 

@article{
author = "Stanisavljević, Rade and Vuković, Aleksandar and Petrović, Dragan V. and Radojević, Rade L. and Barać, Saša and Mileusnić, Zoran and Tadić, Vjekoslav",
year = "2021",
abstract = "This paper presents the tests results of three types of hay mowing machines (later in text: mowers), namely a self-propelled oscillatory mower-conditioner and two tractor-mounted mowers with oscillatory and rotary blades, used to mow alfalfa grown under dry land conditions in the region of central Serbia during three seasons in 2014, 2015 and 2016. Although characterized by older design, they are still commonly used at smaller and medium size farms in this region. Therefore, their optimal exploitation parameters are still of large importance for hay quality and production efficiency and sustainability. The exploitation parameters of all three mowers generally increased linearly with higher speeds, having high R2 values (over 0,8), with rare exceptions. The regression coefficients b clearly showed that the self-propelled mower-conditioner achieved maximum increase in production performance (b = 0,3606), compared with the oscillatory (b = 0,1158) and rotary mowers (b = 0,1414). Mower design had a significant (p ≤ 0,001) effect on cutting and chopping losses, production performance, and specific fuel consumption (p ≤ 0,05). The tests confirmed the superiority of the self-propelled mower over the two mowers aggregated with tractors.",
publisher = "Strojarski Facultet",
journal = "Tehnicki Vjesnik",
title = "Efficiency of alfalfa hay mowing machines under the dryland conditions",
pages = "1510-1503",
number = "5",
volume = "28",
doi = "10.17559/TV-20200720092823"
}

Stanisavljević, R., Vuković, A., Petrović, D. V., Radojević, R. L., Barać, S., Mileusnić, Z.,& Tadić, V.. (2021). Efficiency of alfalfa hay mowing machines under the dryland conditions. in Tehnicki Vjesnik
Strojarski Facultet., 28(5), 1503-1510.
https://doi.org/10.17559/TV-20200720092823

Stanisavljević R, Vuković A, Petrović DV, Radojević RL, Barać S, Mileusnić Z, Tadić V. Efficiency of alfalfa hay mowing machines under the dryland conditions. in Tehnicki Vjesnik. 2021;28(5):1503-1510.
doi:10.17559/TV-20200720092823 .

Stanisavljević, Rade, Vuković, Aleksandar, Petrović, Dragan V., Radojević, Rade L., Barać, Saša, Mileusnić, Zoran, Tadić, Vjekoslav, "Efficiency of alfalfa hay mowing machines under the dryland conditions" in Tehnicki Vjesnik, 28, no. 5 (2021):1503-1510,
https://doi.org/10.17559/TV-20200720092823 . .

TY  - JOUR
AU  - Tomantschger, Kurt
AU  - Petrović, Dragan V.
AU  - Radojević, Rade L.
AU  - Tadić, Vjekoslav
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5927
AB  - One of the technical factors from agricultural nozzles and overall plant protection is droplet diameter, which exclusively depends on working pressure, ISO number and nozzle type. Therefore, this paper was aimed to describe mathematical model for droplet size distribution. Through field exploitation experiment, data was used from three ISO numbers of nozzles (hollow cone 80 015; 02 and 03), two air-assisted sprayers (axial and radial fan) and two permanent crops (vineyard and an apple orchard). Water sensitive papers were used for evaluation of droplet diameters, and digital image analysis with Image J software was used for data processing. Mathematical model through homogenous diffusion equation and simplified differential equation shows that droplet size distribution had exponential function of modelling. Theoretical mathematical model was confirmed in experimental results, where coefficient of determination of exponential regression model for 80 015 nozzles was 0.93 with 5.15 of RMSE. The same coefficient for 80 02 nozzles was 0.96 with 2.88 of RMSE and for 80 03 nozzle R2 was 0.93 with 3.25 of RMSE. In addition, it is proved that droplet diameter depends on operating pressure with very high negative correlation (80 03 nozzles: r = −0.98; 80 02 nozzles: r = −0.97; 80 015 nozzles: r = −0.95). This data will help future researchers in their papers to facilitate and describe similar models for plat protection processes, and all agricultural producers to determine optimal operating pressure which is immensely important in economic, biologic, technical and ecologic aspect.
PB  - Strojarski Facultet
T2  - Tehnicki Vjesnik
T1  - Mathematical Method for Droplet Size Distribution of Agricultural Nozzles
EP  - 1754
IS  - 5
SP  - 1749
VL  - 28
DO  - 10.17559/TV-20200428144856
ER  - 

@article{
author = "Tomantschger, Kurt and Petrović, Dragan V. and Radojević, Rade L. and Tadić, Vjekoslav",
year = "2021",
abstract = "One of the technical factors from agricultural nozzles and overall plant protection is droplet diameter, which exclusively depends on working pressure, ISO number and nozzle type. Therefore, this paper was aimed to describe mathematical model for droplet size distribution. Through field exploitation experiment, data was used from three ISO numbers of nozzles (hollow cone 80 015; 02 and 03), two air-assisted sprayers (axial and radial fan) and two permanent crops (vineyard and an apple orchard). Water sensitive papers were used for evaluation of droplet diameters, and digital image analysis with Image J software was used for data processing. Mathematical model through homogenous diffusion equation and simplified differential equation shows that droplet size distribution had exponential function of modelling. Theoretical mathematical model was confirmed in experimental results, where coefficient of determination of exponential regression model for 80 015 nozzles was 0.93 with 5.15 of RMSE. The same coefficient for 80 02 nozzles was 0.96 with 2.88 of RMSE and for 80 03 nozzle R2 was 0.93 with 3.25 of RMSE. In addition, it is proved that droplet diameter depends on operating pressure with very high negative correlation (80 03 nozzles: r = −0.98; 80 02 nozzles: r = −0.97; 80 015 nozzles: r = −0.95). This data will help future researchers in their papers to facilitate and describe similar models for plat protection processes, and all agricultural producers to determine optimal operating pressure which is immensely important in economic, biologic, technical and ecologic aspect.",
publisher = "Strojarski Facultet",
journal = "Tehnicki Vjesnik",
title = "Mathematical Method for Droplet Size Distribution of Agricultural Nozzles",
pages = "1754-1749",
number = "5",
volume = "28",
doi = "10.17559/TV-20200428144856"
}

Tomantschger, K., Petrović, D. V., Radojević, R. L.,& Tadić, V.. (2021). Mathematical Method for Droplet Size Distribution of Agricultural Nozzles. in Tehnicki Vjesnik
Strojarski Facultet., 28(5), 1749-1754.
https://doi.org/10.17559/TV-20200428144856

Tomantschger K, Petrović DV, Radojević RL, Tadić V. Mathematical Method for Droplet Size Distribution of Agricultural Nozzles. in Tehnicki Vjesnik. 2021;28(5):1749-1754.
doi:10.17559/TV-20200428144856 .

Tomantschger, Kurt, Petrović, Dragan V., Radojević, Rade L., Tadić, Vjekoslav, "Mathematical Method for Droplet Size Distribution of Agricultural Nozzles" in Tehnicki Vjesnik, 28, no. 5 (2021):1749-1754,
https://doi.org/10.17559/TV-20200428144856 . .

TY  - JOUR
AU  - Cerović, Vera B.
AU  - Milković, Dragan
AU  - Grbović, Aleksandar
AU  - Petrović, Dragan
AU  - Simonović, Vojislav
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5265
AB  - Large investments, research efforts and time have been allocated till nowadays for innovation of agricultural tractors and machinery, with the primary aim to increase their productivity, reliability, durability, as well as the environmentally friendly, safe and easy usage. Following this general trend, present work is focused on theoretical analysis of the forces acting on the links of the three-point hitch mechanism. The simulation algorithm and computer code have been developed for calculation of draft forces by two methods (following ASAE D497.4 standard and Goryachkin approach), depending on the three point linkage geometry and mouldboard technical characteristics, and calculation of forces acting on lower and upper links of three-point hitch mechanism. Calculated forces values, based on ASAE draft, exposes smaller differences compared to experimental values, while for the Goryachkin method improvement is possible by entering experimental values for soil resistance coefficient k and coefficient of dynamic resistance s, as we did in this study performing measurements on the aggregate comprehending tractor IMT 539 (IMT Belgrade, Serbia) and two furrow moldboard plough PTO 2.25 (OLT, Osijek, Croatia).
PB  - Ankara Univ, Fac Agr, Diskapi
T2  - Journal of Agricultural Sciences-Tarim Bilimleri Dergisi
T1  - 2D Analytical Model for Evaluation of the Forces in the Three-point Hitch Mechanism
EP  - 281
IS  - 3
SP  - 271
VL  - 26
DO  - 10.15832/ankutbd.493339
ER  - 

@article{
author = "Cerović, Vera B. and Milković, Dragan and Grbović, Aleksandar and Petrović, Dragan and Simonović, Vojislav",
year = "2020",
abstract = "Large investments, research efforts and time have been allocated till nowadays for innovation of agricultural tractors and machinery, with the primary aim to increase their productivity, reliability, durability, as well as the environmentally friendly, safe and easy usage. Following this general trend, present work is focused on theoretical analysis of the forces acting on the links of the three-point hitch mechanism. The simulation algorithm and computer code have been developed for calculation of draft forces by two methods (following ASAE D497.4 standard and Goryachkin approach), depending on the three point linkage geometry and mouldboard technical characteristics, and calculation of forces acting on lower and upper links of three-point hitch mechanism. Calculated forces values, based on ASAE draft, exposes smaller differences compared to experimental values, while for the Goryachkin method improvement is possible by entering experimental values for soil resistance coefficient k and coefficient of dynamic resistance s, as we did in this study performing measurements on the aggregate comprehending tractor IMT 539 (IMT Belgrade, Serbia) and two furrow moldboard plough PTO 2.25 (OLT, Osijek, Croatia).",
publisher = "Ankara Univ, Fac Agr, Diskapi",
journal = "Journal of Agricultural Sciences-Tarim Bilimleri Dergisi",
title = "2D Analytical Model for Evaluation of the Forces in the Three-point Hitch Mechanism",
pages = "281-271",
number = "3",
volume = "26",
doi = "10.15832/ankutbd.493339"
}

Cerović, V. B., Milković, D., Grbović, A., Petrović, D.,& Simonović, V.. (2020). 2D Analytical Model for Evaluation of the Forces in the Three-point Hitch Mechanism. in Journal of Agricultural Sciences-Tarim Bilimleri Dergisi
Ankara Univ, Fac Agr, Diskapi., 26(3), 271-281.
https://doi.org/10.15832/ankutbd.493339

Cerović VB, Milković D, Grbović A, Petrović D, Simonović V. 2D Analytical Model for Evaluation of the Forces in the Three-point Hitch Mechanism. in Journal of Agricultural Sciences-Tarim Bilimleri Dergisi. 2020;26(3):271-281.
doi:10.15832/ankutbd.493339 .

Cerović, Vera B., Milković, Dragan, Grbović, Aleksandar, Petrović, Dragan, Simonović, Vojislav, "2D Analytical Model for Evaluation of the Forces in the Three-point Hitch Mechanism" in Journal of Agricultural Sciences-Tarim Bilimleri Dergisi, 26, no. 3 (2020):271-281,
https://doi.org/10.15832/ankutbd.493339 . .

TY  - JOUR
AU  - Petrović, Dragan
AU  - Cerović, Vera B.
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5467
AB  - This paper presents the fifth part of the serie, which presents the graphic designations, i.e. symbols, of the most of standard components of hydraulic systems according to current international standards (ISO). This work is focused to the symbols for simplified presentation on the hydraulic diagrams of the associated components intended for the storage and conditioning of hydraulic oil, and for the storage of energy delivered to the oil as working fluid by hydraulic pumps. The function of oil storage is provided by appropriate hydraulic tanks and the hydraulic energy is stored by means of oil-hydraulic accumulators. Symbols of components for maintaining hydraulic oil operating parameters within optimum limits are also shown. The components also included in this presentation are specified for: purification (oil-hydraulic filters), heating (preheaters/heaters) and cooling (oil-hydraulic coolers).
AB  - Ovaj rad predstavlja peti deo serije u kome su prikazane grafičke oznake (simboli) većine standardnih komponenata hidrauličkih sistema prema važećim međunarodnim tehničkim standardima (ISO). Prikaz je fokusiran na simbole kojima se na hidrauličkim šemama uprošćeno predstavljaju pripadajuće komponente namenjene skladištenju, prečišćavanju i kondicioniranju hidrauličkog ulja, te za skladištenje energije predate hidrauličkom ulju, kao radnoj tečnosti, od strane izvornih organa (hidrauličkih pumpi). Funkciju skladištenja ulja obavljaju hidraulički rezervoari, a hidraulička energija se skladišti pomoću uljno-hidrauličkih akumulatora. Simboli komponenata za održavanje radnih parametara hidrauličkog ulja u optimalnim granicama su takođe prikazani. Obuhvaćene su komponente namenjene: prečišćavanju (uljno-hidraulički filteri), grejanju (predgrejači/grejači) i hlađenju (uljno-hidraulički hladnjaci).
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Hydraulic symbols: Part five: Auxilliary componets
T1  - Hidraulički simboli - deo V - "Pribor"
EP  - 9
IS  - 1
SP  - 1
VL  - 45
DO  - 10.5937/PoljTeh2001001P
ER  - 

@article{
author = "Petrović, Dragan and Cerović, Vera B.",
year = "2020",
abstract = "This paper presents the fifth part of the serie, which presents the graphic designations, i.e. symbols, of the most of standard components of hydraulic systems according to current international standards (ISO). This work is focused to the symbols for simplified presentation on the hydraulic diagrams of the associated components intended for the storage and conditioning of hydraulic oil, and for the storage of energy delivered to the oil as working fluid by hydraulic pumps. The function of oil storage is provided by appropriate hydraulic tanks and the hydraulic energy is stored by means of oil-hydraulic accumulators. Symbols of components for maintaining hydraulic oil operating parameters within optimum limits are also shown. The components also included in this presentation are specified for: purification (oil-hydraulic filters), heating (preheaters/heaters) and cooling (oil-hydraulic coolers)., Ovaj rad predstavlja peti deo serije u kome su prikazane grafičke oznake (simboli) većine standardnih komponenata hidrauličkih sistema prema važećim međunarodnim tehničkim standardima (ISO). Prikaz je fokusiran na simbole kojima se na hidrauličkim šemama uprošćeno predstavljaju pripadajuće komponente namenjene skladištenju, prečišćavanju i kondicioniranju hidrauličkog ulja, te za skladištenje energije predate hidrauličkom ulju, kao radnoj tečnosti, od strane izvornih organa (hidrauličkih pumpi). Funkciju skladištenja ulja obavljaju hidraulički rezervoari, a hidraulička energija se skladišti pomoću uljno-hidrauličkih akumulatora. Simboli komponenata za održavanje radnih parametara hidrauličkog ulja u optimalnim granicama su takođe prikazani. Obuhvaćene su komponente namenjene: prečišćavanju (uljno-hidraulički filteri), grejanju (predgrejači/grejači) i hlađenju (uljno-hidraulički hladnjaci).",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Hydraulic symbols: Part five: Auxilliary componets, Hidraulički simboli - deo V - "Pribor"",
pages = "9-1",
number = "1",
volume = "45",
doi = "10.5937/PoljTeh2001001P"
}

Petrović, D.,& Cerović, V. B.. (2020). Hydraulic symbols: Part five: Auxilliary componets. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 45(1), 1-9.
https://doi.org/10.5937/PoljTeh2001001P

Petrović D, Cerović VB. Hydraulic symbols: Part five: Auxilliary componets. in Poljoprivredna tehnika. 2020;45(1):1-9.
doi:10.5937/PoljTeh2001001P .

Petrović, Dragan, Cerović, Vera B., "Hydraulic symbols: Part five: Auxilliary componets" in Poljoprivredna tehnika, 45, no. 1 (2020):1-9,
https://doi.org/10.5937/PoljTeh2001001P . .

TY  - JOUR
AU  - Tomić, Srdjan
AU  - Bulajić, Stanko
AU  - Radojević, Rade
AU  - Petrović, Dragan
AU  - Ketin, Sonja
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4950
AB  - The paper presents an application of the model for monitoring of pollution in the mining pits. There were presented the measuring results of suspended particles. There have been elaborated the measuring results in 2006 and 2007 years. This study analyzes of the impact of lignite exploitation on surface pit on the environment, to analyze and assess the impact of lignite mining on air pollution were used the standard models EPA (US Environmental Protection Agency) and AERMOD and ISC3. AERMOD model includes a wide range of possibilities for modeling the impact of pollutants on air pollution.
PB  - Parlar Scientific Publications (P S P), Freising
T2  - Fresenius Environmental Bulletin
T1  - The distribution of concentration of suspended particles-coal mine
EP  - 5770
IS  - 8
SP  - 5764
VL  - 28
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_4950
ER  - 

@article{
author = "Tomić, Srdjan and Bulajić, Stanko and Radojević, Rade and Petrović, Dragan and Ketin, Sonja",
year = "2019",
abstract = "The paper presents an application of the model for monitoring of pollution in the mining pits. There were presented the measuring results of suspended particles. There have been elaborated the measuring results in 2006 and 2007 years. This study analyzes of the impact of lignite exploitation on surface pit on the environment, to analyze and assess the impact of lignite mining on air pollution were used the standard models EPA (US Environmental Protection Agency) and AERMOD and ISC3. AERMOD model includes a wide range of possibilities for modeling the impact of pollutants on air pollution.",
publisher = "Parlar Scientific Publications (P S P), Freising",
journal = "Fresenius Environmental Bulletin",
title = "The distribution of concentration of suspended particles-coal mine",
pages = "5770-5764",
number = "8",
volume = "28",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_4950"
}

Tomić, S., Bulajić, S., Radojević, R., Petrović, D.,& Ketin, S.. (2019). The distribution of concentration of suspended particles-coal mine. in Fresenius Environmental Bulletin
Parlar Scientific Publications (P S P), Freising., 28(8), 5764-5770.
https://hdl.handle.net/21.15107/rcub_agrospace_4950

Tomić S, Bulajić S, Radojević R, Petrović D, Ketin S. The distribution of concentration of suspended particles-coal mine. in Fresenius Environmental Bulletin. 2019;28(8):5764-5770.
https://hdl.handle.net/21.15107/rcub_agrospace_4950 .

Tomić, Srdjan, Bulajić, Stanko, Radojević, Rade, Petrović, Dragan, Ketin, Sonja, "The distribution of concentration of suspended particles-coal mine" in Fresenius Environmental Bulletin, 28, no. 8 (2019):5764-5770,
https://hdl.handle.net/21.15107/rcub_agrospace_4950 .

TY  - JOUR
AU  - Stanisavljević, Rade
AU  - Vuković, Aleksandar
AU  - Sasa, Barac
AU  - Radojević, Rade
AU  - Dokić, Dagoslav
AU  - Petrović, Dragan
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5166
AB  - The paper presents the three years efficiency results (2011-2013) of the work and ways of harvesting (three types of mowers, with or without spreading the forage) influencing the quality of the forage (the content of crude protein and crude fiber) during the three days drying process. These results indicate that the harvesting method can strongly affect the work efficiency, energy consumption, the forage drying intensity and the quality of forage used for hay and haylage preparation. The best quality of the forage was achieved when a drum rotating mower POTTINGER CAT 185 was used. Negative correlation was found between content of crude protein and the crude fibre content, depending on the type of mower, varying in the range between r= -0.978 and r= -0.882 (POTTINGER CAT 185 r= -0.882 P  lt = 0.05 to JF STOLL SB 200 r= -0.978 P  lt = 0.001).
PB  - Ankara University
T2  - Tarim Bilimleri Dergisi
T1  - Influence of Harvesting on Quality of Alfalfa Forage used for Haylage and Hay
EP  - 390
IS  - 3
SP  - 384
VL  - 25
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5166
ER  - 

@article{
author = "Stanisavljević, Rade and Vuković, Aleksandar and Sasa, Barac and Radojević, Rade and Dokić, Dagoslav and Petrović, Dragan",
year = "2019",
abstract = "The paper presents the three years efficiency results (2011-2013) of the work and ways of harvesting (three types of mowers, with or without spreading the forage) influencing the quality of the forage (the content of crude protein and crude fiber) during the three days drying process. These results indicate that the harvesting method can strongly affect the work efficiency, energy consumption, the forage drying intensity and the quality of forage used for hay and haylage preparation. The best quality of the forage was achieved when a drum rotating mower POTTINGER CAT 185 was used. Negative correlation was found between content of crude protein and the crude fibre content, depending on the type of mower, varying in the range between r= -0.978 and r= -0.882 (POTTINGER CAT 185 r= -0.882 P  lt = 0.05 to JF STOLL SB 200 r= -0.978 P  lt = 0.001).",
publisher = "Ankara University",
journal = "Tarim Bilimleri Dergisi",
title = "Influence of Harvesting on Quality of Alfalfa Forage used for Haylage and Hay",
pages = "390-384",
number = "3",
volume = "25",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5166"
}

Stanisavljević, R., Vuković, A., Sasa, B., Radojević, R., Dokić, D.,& Petrović, D.. (2019). Influence of Harvesting on Quality of Alfalfa Forage used for Haylage and Hay. in Tarim Bilimleri Dergisi
Ankara University., 25(3), 384-390.
https://hdl.handle.net/21.15107/rcub_agrospace_5166

Stanisavljević R, Vuković A, Sasa B, Radojević R, Dokić D, Petrović D. Influence of Harvesting on Quality of Alfalfa Forage used for Haylage and Hay. in Tarim Bilimleri Dergisi. 2019;25(3):384-390.
https://hdl.handle.net/21.15107/rcub_agrospace_5166 .

Stanisavljević, Rade, Vuković, Aleksandar, Sasa, Barac, Radojević, Rade, Dokić, Dagoslav, Petrović, Dragan, "Influence of Harvesting on Quality of Alfalfa Forage used for Haylage and Hay" in Tarim Bilimleri Dergisi, 25, no. 3 (2019):384-390,
https://hdl.handle.net/21.15107/rcub_agrospace_5166 .

TY  - JOUR
AU  - Petrović, Dragan
AU  - Cerović, Vera B.
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5178
AB  - The mechanization of a wide variety of production processes and operations in modern primary agricultural production, transport, storage and the accompanying food processing industry can hardly be accomplished without automation. In most cases, production efficiency and environmental sustainability require, among other things, accurate control of the flow of energy within the installations, work machines, devices and mechanisms used. From the point of view of the theory of automatic control and regulation, the elements of the engaged technique: machines, devices and mechanisms represent the objects of control. The controlled routing and optimal delivery of energy to desired management facilities is, as a rule, very rarely uniform, as it must have correctlyaligned timing with the current variable requirements of the production or operation process, which often change quite unpredictably over the time. The required amount of energy can be transferred to consumers in agriculture through the application of appropriate mechanical, electrical, pneumatic or hydraulic systems, as well as with their combinations. All existing kinds of energy transmission systems have certain advantages and disadvantages, with a common requirement for appropriate controls. In the focus of interest of this paper are the graphic symbols of the directional control valves for hydraulic transmission and control, designated as hydraulic directional control valves, or shorter, the hydraulic distributors.
AB  - Mehanizacija mnogobrojnih proizvodnih procesa i operacija u savremenoj primarnoj poljoprivrednoj proizvodnji, transportu, skladištenju i pratećoj prehrambenoj prerađivačkoj industriji teško se može ostvariti bez automatizacije. U najvećem broju slučajeva, proizvodna efikasnost i ekološka održivost zahtevaju, između ostalog, preciznu kontrolu toka energije u okviru primenjenih instalacija, radnih mašina, uređaja i mehanizmima. Sa gledišta teorije automatskog upravljanja, elementi angažovane tehnike, mašine, uređaji i mehanizmi, mogu predstavljati objekte upravljanja. Kontrolisano usmeravanje i optimalno dostavljanje određene količine energije željenim objektima upravljanja po pravilu je veoma retko uniformno, jer mora biti usklađeno sa vremenski nepredvidivim promenama zahteva proizvodnog procesa ili operacije. Potrebna energija može se preneti prema potrošačima u poljoprivredi primenom odgovarajućih mehaničkih, električnih, pneumatskih ili hidrauličkih sistema, kao i njihovim sadejstvom. Svi postojeći tipovi sistema prenosa energije imaju izvesne prednosti i nedostatke, uz zajednicki zahtev za odgovarajućim upravljačkim elementima. U fokusu ovog rada su grafički simboli upravljačkih ventila hidrauličkog prenosa energije (snage) i upravljačkih signala, označeni kao hidraulički razvodni ventili, ili hidraulički razvodnici.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Hydraulic symbols - part four: Directional control valves
T1  - Hidraulički simboli - deo IV - razvodni ventili
EP  - 16
IS  - 4
SP  - 1
VL  - 44
DO  - 10.5937/PoljTeh1904001P
ER  - 

@article{
author = "Petrović, Dragan and Cerović, Vera B.",
year = "2019",
abstract = "The mechanization of a wide variety of production processes and operations in modern primary agricultural production, transport, storage and the accompanying food processing industry can hardly be accomplished without automation. In most cases, production efficiency and environmental sustainability require, among other things, accurate control of the flow of energy within the installations, work machines, devices and mechanisms used. From the point of view of the theory of automatic control and regulation, the elements of the engaged technique: machines, devices and mechanisms represent the objects of control. The controlled routing and optimal delivery of energy to desired management facilities is, as a rule, very rarely uniform, as it must have correctlyaligned timing with the current variable requirements of the production or operation process, which often change quite unpredictably over the time. The required amount of energy can be transferred to consumers in agriculture through the application of appropriate mechanical, electrical, pneumatic or hydraulic systems, as well as with their combinations. All existing kinds of energy transmission systems have certain advantages and disadvantages, with a common requirement for appropriate controls. In the focus of interest of this paper are the graphic symbols of the directional control valves for hydraulic transmission and control, designated as hydraulic directional control valves, or shorter, the hydraulic distributors., Mehanizacija mnogobrojnih proizvodnih procesa i operacija u savremenoj primarnoj poljoprivrednoj proizvodnji, transportu, skladištenju i pratećoj prehrambenoj prerađivačkoj industriji teško se može ostvariti bez automatizacije. U najvećem broju slučajeva, proizvodna efikasnost i ekološka održivost zahtevaju, između ostalog, preciznu kontrolu toka energije u okviru primenjenih instalacija, radnih mašina, uređaja i mehanizmima. Sa gledišta teorije automatskog upravljanja, elementi angažovane tehnike, mašine, uređaji i mehanizmi, mogu predstavljati objekte upravljanja. Kontrolisano usmeravanje i optimalno dostavljanje određene količine energije željenim objektima upravljanja po pravilu je veoma retko uniformno, jer mora biti usklađeno sa vremenski nepredvidivim promenama zahteva proizvodnog procesa ili operacije. Potrebna energija može se preneti prema potrošačima u poljoprivredi primenom odgovarajućih mehaničkih, električnih, pneumatskih ili hidrauličkih sistema, kao i njihovim sadejstvom. Svi postojeći tipovi sistema prenosa energije imaju izvesne prednosti i nedostatke, uz zajednicki zahtev za odgovarajućim upravljačkim elementima. U fokusu ovog rada su grafički simboli upravljačkih ventila hidrauličkog prenosa energije (snage) i upravljačkih signala, označeni kao hidraulički razvodni ventili, ili hidraulički razvodnici.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Hydraulic symbols - part four: Directional control valves, Hidraulički simboli - deo IV - razvodni ventili",
pages = "16-1",
number = "4",
volume = "44",
doi = "10.5937/PoljTeh1904001P"
}

Petrović, D.,& Cerović, V. B.. (2019). Hydraulic symbols - part four: Directional control valves. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 44(4), 1-16.
https://doi.org/10.5937/PoljTeh1904001P

Petrović D, Cerović VB. Hydraulic symbols - part four: Directional control valves. in Poljoprivredna tehnika. 2019;44(4):1-16.
doi:10.5937/PoljTeh1904001P .

Petrović, Dragan, Cerović, Vera B., "Hydraulic symbols - part four: Directional control valves" in Poljoprivredna tehnika, 44, no. 4 (2019):1-16,
https://doi.org/10.5937/PoljTeh1904001P . .

TY  - JOUR
AU  - Petrović, Dragan
AU  - Cerović, Vera B.
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5202
AB  - Similar to human health, the importance of hydraulics sometimes becomes apparent only in her absence. Images and motives of agricultural workers from the past times and centuries can look attractive only on paintings of arts. In reality, it was a very hard and sometimes quite dangerous job. The introduction of hydraulics in construction of modern farming machines, agriculture is less demanding for all farm workers, but also more efficient, which is of particular importance for providing enough food for the growing world during the 20-th century. Achieving high efficiency, reliability and long service life of these systems requires sophisticated diagnostics and failure repairment, regular maintenance and careful use of each hydraulic system, and this is only possible with a good knowledge of the functional principles of all elements, their connections and the whole system. However, modern hydraulic systems of agricultural machines are often very complicated, and the construction of their components is too complex for detailed graphic representation within the whole corresponding hydraulic installation. Therefore, instead of detailed representation of the components, schematic diagrams are used. This manuscript represents a logical continuation of the first and second parts of the paper, devoted to the general symbols, labels of measuring instruments and indicators (part one), as well as pumps and actuators (part two). The third) part of the paper presents the hydraulic symbols of the system control elements - hydraulic valves. The graphical symbols of these components are defined by ISO standards.
AB  - Slično ljudskom zdravlju, značaj hidraulike ponekad postaje vidljiv samo u njenom odsustvu. Slike i motivi radnika u poljoprivredi iz prošlih vremena i vekova mogu izgledati privlačno samo na umetničkim slikama. U stvarnosti, to je bio veoma naporan i ponekad prilično opasan posao. Uvođenje hidraulike u konstrukcije savremenih poljoprivrednih mašina za poljoprivrednu proizvodnju, učinilo je poljoprivredu fizički manje zahtevnom za radnike, ali i efikasnijom, što je od posebne važnosti za obezbeđenje hrane rastuće svetske populacije tokom XX veka. Postizanje visoke efikasnosti, pouzdanosti i dugog radnog veka ovih sistema zahteva naprednu dijagnostika i otklanjanje kvarova, redovno održavanje i pažljivo korišćenje svakog hidrauličkog sistema, a to je moguće samo uz dobro poznavanje funkcionalnih principa svih elemenata, njihovih veza i sistema u celini. Međutim, savremeni hidraulički sistemi poljoprivrednih mašina često su veoma komplikovani, a konstrukcija njihovih komponenata previše kompeksna za detaljno grafičko predstavljanje u sastavu pripadajuće hidrauličke instalacije. Zato, umesto detaljnog predstavljanja komponenata, koriste se odgovarajući šematski dijagrami. Ovaj tekst predstavlja logičan nastavak prvog i drugog dela rada, posvećenih opštim simbolima, oznakama mernih instrumenata i indikatora (prvi deo), kao i pumpama i izvršnim elementima (drugi deo). Treći deo rada prikazuje hidrauličke simbole elemenata za upravljanje - hidrauličke ventile. Grafičke simboličke oznake upravljačkih komponenata su definisane ISO standardima.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Hydraulic symbols: Part three: Valves
T1  - Hidraulički simboli - deo III - ventili
EP  - 16
IS  - 3
SP  - 1
VL  - 44
DO  - 10.5937/PoljTeh1903001P
ER  - 

@article{
author = "Petrović, Dragan and Cerović, Vera B.",
year = "2019",
abstract = "Similar to human health, the importance of hydraulics sometimes becomes apparent only in her absence. Images and motives of agricultural workers from the past times and centuries can look attractive only on paintings of arts. In reality, it was a very hard and sometimes quite dangerous job. The introduction of hydraulics in construction of modern farming machines, agriculture is less demanding for all farm workers, but also more efficient, which is of particular importance for providing enough food for the growing world during the 20-th century. Achieving high efficiency, reliability and long service life of these systems requires sophisticated diagnostics and failure repairment, regular maintenance and careful use of each hydraulic system, and this is only possible with a good knowledge of the functional principles of all elements, their connections and the whole system. However, modern hydraulic systems of agricultural machines are often very complicated, and the construction of their components is too complex for detailed graphic representation within the whole corresponding hydraulic installation. Therefore, instead of detailed representation of the components, schematic diagrams are used. This manuscript represents a logical continuation of the first and second parts of the paper, devoted to the general symbols, labels of measuring instruments and indicators (part one), as well as pumps and actuators (part two). The third) part of the paper presents the hydraulic symbols of the system control elements - hydraulic valves. The graphical symbols of these components are defined by ISO standards., Slično ljudskom zdravlju, značaj hidraulike ponekad postaje vidljiv samo u njenom odsustvu. Slike i motivi radnika u poljoprivredi iz prošlih vremena i vekova mogu izgledati privlačno samo na umetničkim slikama. U stvarnosti, to je bio veoma naporan i ponekad prilično opasan posao. Uvođenje hidraulike u konstrukcije savremenih poljoprivrednih mašina za poljoprivrednu proizvodnju, učinilo je poljoprivredu fizički manje zahtevnom za radnike, ali i efikasnijom, što je od posebne važnosti za obezbeđenje hrane rastuće svetske populacije tokom XX veka. Postizanje visoke efikasnosti, pouzdanosti i dugog radnog veka ovih sistema zahteva naprednu dijagnostika i otklanjanje kvarova, redovno održavanje i pažljivo korišćenje svakog hidrauličkog sistema, a to je moguće samo uz dobro poznavanje funkcionalnih principa svih elemenata, njihovih veza i sistema u celini. Međutim, savremeni hidraulički sistemi poljoprivrednih mašina često su veoma komplikovani, a konstrukcija njihovih komponenata previše kompeksna za detaljno grafičko predstavljanje u sastavu pripadajuće hidrauličke instalacije. Zato, umesto detaljnog predstavljanja komponenata, koriste se odgovarajući šematski dijagrami. Ovaj tekst predstavlja logičan nastavak prvog i drugog dela rada, posvećenih opštim simbolima, oznakama mernih instrumenata i indikatora (prvi deo), kao i pumpama i izvršnim elementima (drugi deo). Treći deo rada prikazuje hidrauličke simbole elemenata za upravljanje - hidrauličke ventile. Grafičke simboličke oznake upravljačkih komponenata su definisane ISO standardima.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Hydraulic symbols: Part three: Valves, Hidraulički simboli - deo III - ventili",
pages = "16-1",
number = "3",
volume = "44",
doi = "10.5937/PoljTeh1903001P"
}

Petrović, D.,& Cerović, V. B.. (2019). Hydraulic symbols: Part three: Valves. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 44(3), 1-16.
https://doi.org/10.5937/PoljTeh1903001P

Petrović D, Cerović VB. Hydraulic symbols: Part three: Valves. in Poljoprivredna tehnika. 2019;44(3):1-16.
doi:10.5937/PoljTeh1903001P .

Petrović, Dragan, Cerović, Vera B., "Hydraulic symbols: Part three: Valves" in Poljoprivredna tehnika, 44, no. 3 (2019):1-16,
https://doi.org/10.5937/PoljTeh1903001P . .

TY  - JOUR
AU  - Petrović, Dragan
AU  - Cerović, Vera B.
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5216
AB  - Hydraulic power transfer and management systems are widely used in modern agriculture, especially in agricultural engineering and the associated processing industry. They can be very simple, but also extremely complex, when precise matching of the interaction of their components in real time is very difficult to controll and achieve. In addition, the designs of a number of hydraulic components is sufficiently complicated for detailed representation on the corresponding hydraulic installation. In all cases, analyzing the performance characteristics of components and the entire hydraulic system, as well as understanding the structure of the hydraulic system, is of great importance. One of the generally accepted ways to facilitate and speed up these processes is the application of schematic diagrams of hydraulic systems and their subcircuits. Officially, hydraulic symbols are defined by ISO industry standards. Therefore, ideally, all hydraulic schemes should be configured using universal graphic symbols. Unfortunately, this is not always the case in technical practice. Depending on the manufacturer and/or dealer of the hydraulic equipment, the symbols of the associated schemes vary in a smaller or a greater extent. The real reasons for the existence of these differences can only be assumed. According to some authors, companies want their drawings to differ from the hydraulic schema of competitors. Therefore, the most commonly used hydraulic symbols are presented in this paper.
AB  - Hidraulički sistemi prenosa snage i upravljanja široko su zastupljeni u savremenoj poljoprivredi, a posebno u poljoprivrednoj tehnici i pratećoj prerađivačkoj industriji. Mogu biti veoma jednostavni, ali i izuzetno složeni, kada je precizno usklađivanje međusobnih interakcija njihovih komponenata u realnom vremenu veoma otežano. Pored toga, konstrukcija velikog broja hidrauličkih komponenata je dovoljno komplikovana za detaljno predstavljanje u sklopu pripadajuće hidrauličke instalacije. U svim slučajevima, analizanje radnih karakteristika komponenata i celokupnog hidrauličkog sistema, kao i razumevanje strukture hidrauličkog sistema, od neprocenjivog je značaja. Jedan od opšte prihvaćenih načina za olakšavanje i ubrzavanje ovih procesa je izrada i korišćenje šematskih dijagrama hidrauličkih sistema, kao i strujnih kola (podsistema) od kojih su sastavljeni. Zvanično, simboli hidraulike definisani su ISO industrijskim standardima. Stoga, u idealnom slučaju, sve hidrauličke šeme bi trebale sadržati univerzalne simboličke oznake. To ipak nije uvek slučaj u tehničkoj praksi. U zavisnosti od proizvođača i/ili prodavca hidrauličke opreme, simboli pripadajućih šema se nekada mogu razlikovati u izvesnoj meri. Stvarne razloge postojanja ovih razlika je moguće samo pretpostaviti. Prema nekim autorima, proizvođači i/ili prodavci žele da se njihovi crteži razlikuju od hidrauličkih šema konkurenata. Prema drugima, simboli su dizajnirani da predstave većinu raspoloživih komponenata, ali ipak ne mogu pokriti sve postojeće te se zato formiraju dodatni nestandardni simboli u nekim posebnim situacijama. Zato se neki elementi hidrauličkih instalacija moraju predstavljati kao kombinacije različitih postojećih simbola da bi se pokazalo kao funkcionišu. U ovom radu zato su dominantno prikazani standardni hidraulički simboli, a u ređim slučajevima i neki simboli hidrauličkih komponenata koji se i dalje relativno često sreću na hidrauličkim šemama u praksi.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Hydraulic symbols: Part one: General symbols and symbols of measuring instruments and indicators
T1  - Hidraulički simboli - deo I - opšti simboli i oznake mernih instrumenata i indikatora
EP  - 56
IS  - 1
SP  - 45
VL  - 44
DO  - 10.5937/PoljTeh1901045P
ER  - 

@article{
author = "Petrović, Dragan and Cerović, Vera B.",
year = "2019",
abstract = "Hydraulic power transfer and management systems are widely used in modern agriculture, especially in agricultural engineering and the associated processing industry. They can be very simple, but also extremely complex, when precise matching of the interaction of their components in real time is very difficult to controll and achieve. In addition, the designs of a number of hydraulic components is sufficiently complicated for detailed representation on the corresponding hydraulic installation. In all cases, analyzing the performance characteristics of components and the entire hydraulic system, as well as understanding the structure of the hydraulic system, is of great importance. One of the generally accepted ways to facilitate and speed up these processes is the application of schematic diagrams of hydraulic systems and their subcircuits. Officially, hydraulic symbols are defined by ISO industry standards. Therefore, ideally, all hydraulic schemes should be configured using universal graphic symbols. Unfortunately, this is not always the case in technical practice. Depending on the manufacturer and/or dealer of the hydraulic equipment, the symbols of the associated schemes vary in a smaller or a greater extent. The real reasons for the existence of these differences can only be assumed. According to some authors, companies want their drawings to differ from the hydraulic schema of competitors. Therefore, the most commonly used hydraulic symbols are presented in this paper., Hidraulički sistemi prenosa snage i upravljanja široko su zastupljeni u savremenoj poljoprivredi, a posebno u poljoprivrednoj tehnici i pratećoj prerađivačkoj industriji. Mogu biti veoma jednostavni, ali i izuzetno složeni, kada je precizno usklađivanje međusobnih interakcija njihovih komponenata u realnom vremenu veoma otežano. Pored toga, konstrukcija velikog broja hidrauličkih komponenata je dovoljno komplikovana za detaljno predstavljanje u sklopu pripadajuće hidrauličke instalacije. U svim slučajevima, analizanje radnih karakteristika komponenata i celokupnog hidrauličkog sistema, kao i razumevanje strukture hidrauličkog sistema, od neprocenjivog je značaja. Jedan od opšte prihvaćenih načina za olakšavanje i ubrzavanje ovih procesa je izrada i korišćenje šematskih dijagrama hidrauličkih sistema, kao i strujnih kola (podsistema) od kojih su sastavljeni. Zvanično, simboli hidraulike definisani su ISO industrijskim standardima. Stoga, u idealnom slučaju, sve hidrauličke šeme bi trebale sadržati univerzalne simboličke oznake. To ipak nije uvek slučaj u tehničkoj praksi. U zavisnosti od proizvođača i/ili prodavca hidrauličke opreme, simboli pripadajućih šema se nekada mogu razlikovati u izvesnoj meri. Stvarne razloge postojanja ovih razlika je moguće samo pretpostaviti. Prema nekim autorima, proizvođači i/ili prodavci žele da se njihovi crteži razlikuju od hidrauličkih šema konkurenata. Prema drugima, simboli su dizajnirani da predstave većinu raspoloživih komponenata, ali ipak ne mogu pokriti sve postojeće te se zato formiraju dodatni nestandardni simboli u nekim posebnim situacijama. Zato se neki elementi hidrauličkih instalacija moraju predstavljati kao kombinacije različitih postojećih simbola da bi se pokazalo kao funkcionišu. U ovom radu zato su dominantno prikazani standardni hidraulički simboli, a u ređim slučajevima i neki simboli hidrauličkih komponenata koji se i dalje relativno često sreću na hidrauličkim šemama u praksi.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Hydraulic symbols: Part one: General symbols and symbols of measuring instruments and indicators, Hidraulički simboli - deo I - opšti simboli i oznake mernih instrumenata i indikatora",
pages = "56-45",
number = "1",
volume = "44",
doi = "10.5937/PoljTeh1901045P"
}

Petrović, D.,& Cerović, V. B.. (2019). Hydraulic symbols: Part one: General symbols and symbols of measuring instruments and indicators. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 44(1), 45-56.
https://doi.org/10.5937/PoljTeh1901045P

Petrović D, Cerović VB. Hydraulic symbols: Part one: General symbols and symbols of measuring instruments and indicators. in Poljoprivredna tehnika. 2019;44(1):45-56.
doi:10.5937/PoljTeh1901045P .

Petrović, Dragan, Cerović, Vera B., "Hydraulic symbols: Part one: General symbols and symbols of measuring instruments and indicators" in Poljoprivredna tehnika, 44, no. 1 (2019):45-56,
https://doi.org/10.5937/PoljTeh1901045P . .

TY  - JOUR
AU  - Petrović, Dragan
AU  - Cerović, Vera B.
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5219
AB  - At the current level of technological development, it is widely accepted that survival and progress of modern agricultural technology (among other things) is based on the widespread application of electronically controlled hydraulic systems, supported by mechanical elements of power transmission and control. This paper is a logical continuation of the first part, entitled "Hydraulic symbols - part I: general symbols and designations of measuring instruments and indicators". Therefore, the current second part of the paper is devoted to the presentation and description of hydraulic symbols of pumps and various types of actuators: linear, rotary and oscillatory. Symbols of the combined-function devices, which can optionally function in two different operating modes, such as pumps or motors, are also shown. Standard symbols of all groups of hydraulic components, which are in the focus of this paper, are standardized and defined by ISO industry standards.
AB  - Na sadašnjem nivou tehnološkog razvoja, opšte je prihvaćeno mišljenje da savremena poljoprivredna tehnika, između ostalog, svoj napredak zasniva na širokoj primeni elektronski kontrolisanih hidrauličkih sistema, podržanih mehaničkim elementima prenosa snage i upravljanja. Ovaj rukopis predstavlja logičan nastavak prvog dela rada, pod nazivom "Hidraulički simboli - deo I: opšti simboli i oznake mernih instrumenata i indikatora", posvećenog pripadajućoj tematici. Zato je drugi deo rada posvećen prikazu i opisu hidrauličkih simbola pumpi i različitih tipova izvršnih hidrauličkih organa i to: linearnih, rotacionih i oscilatornih. Takođe su predstavljeni i simboli uređaja kombinovane namene, koji opciono mogu funkcionisati u dva različita radna režima, kao hidrauličke pumpe ili hidraulički motori. Simboli svih grupa hidrauličkih komponenata, koje su u fokusu ovog rada, standardizovani su i definisani ISO industrijskim standardima.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Hydraulic symbols - Part Two: Pumps and actuators
T1  - Hidraulički simboli - deo II - pumpe i izvršni organi
EP  - 12
IS  - 2
SP  - 1
VL  - 44
DO  - 10.5937/PoljTeh1902001P
ER  - 

@article{
author = "Petrović, Dragan and Cerović, Vera B.",
year = "2019",
abstract = "At the current level of technological development, it is widely accepted that survival and progress of modern agricultural technology (among other things) is based on the widespread application of electronically controlled hydraulic systems, supported by mechanical elements of power transmission and control. This paper is a logical continuation of the first part, entitled "Hydraulic symbols - part I: general symbols and designations of measuring instruments and indicators". Therefore, the current second part of the paper is devoted to the presentation and description of hydraulic symbols of pumps and various types of actuators: linear, rotary and oscillatory. Symbols of the combined-function devices, which can optionally function in two different operating modes, such as pumps or motors, are also shown. Standard symbols of all groups of hydraulic components, which are in the focus of this paper, are standardized and defined by ISO industry standards., Na sadašnjem nivou tehnološkog razvoja, opšte je prihvaćeno mišljenje da savremena poljoprivredna tehnika, između ostalog, svoj napredak zasniva na širokoj primeni elektronski kontrolisanih hidrauličkih sistema, podržanih mehaničkim elementima prenosa snage i upravljanja. Ovaj rukopis predstavlja logičan nastavak prvog dela rada, pod nazivom "Hidraulički simboli - deo I: opšti simboli i oznake mernih instrumenata i indikatora", posvećenog pripadajućoj tematici. Zato je drugi deo rada posvećen prikazu i opisu hidrauličkih simbola pumpi i različitih tipova izvršnih hidrauličkih organa i to: linearnih, rotacionih i oscilatornih. Takođe su predstavljeni i simboli uređaja kombinovane namene, koji opciono mogu funkcionisati u dva različita radna režima, kao hidrauličke pumpe ili hidraulički motori. Simboli svih grupa hidrauličkih komponenata, koje su u fokusu ovog rada, standardizovani su i definisani ISO industrijskim standardima.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Hydraulic symbols - Part Two: Pumps and actuators, Hidraulički simboli - deo II - pumpe i izvršni organi",
pages = "12-1",
number = "2",
volume = "44",
doi = "10.5937/PoljTeh1902001P"
}

Petrović, D.,& Cerović, V. B.. (2019). Hydraulic symbols - Part Two: Pumps and actuators. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 44(2), 1-12.
https://doi.org/10.5937/PoljTeh1902001P

Petrović D, Cerović VB. Hydraulic symbols - Part Two: Pumps and actuators. in Poljoprivredna tehnika. 2019;44(2):1-12.
doi:10.5937/PoljTeh1902001P .

Petrović, Dragan, Cerović, Vera B., "Hydraulic symbols - Part Two: Pumps and actuators" in Poljoprivredna tehnika, 44, no. 2 (2019):1-12,
https://doi.org/10.5937/PoljTeh1902001P . .

TY  - JOUR
AU  - Oljača, Mićo V.
AU  - Pajić, Miloš
AU  - Gligorević, Kosta
AU  - Dražić, Milan
AU  - Zlatanović, Ivan
AU  - Dimitrijević, Aleksandra
AU  - Miodragović, Rajko
AU  - Mileusnić, Zoran
AU  - Radojević, Rade
AU  - Živković, Milovan
AU  - Petrović, Dragan
AU  - Radivojević, Dušan
AU  - Urošević, Mirko
AU  - Topisirović, Goran
AU  - Radičević, Branko
AU  - Ećim, Olivera
AU  - Balać, Nebojša
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4863
AB  - The paper analyzes the possibility and the needs for the use of specific types of robots (mini unmanned aircraft with different designs and the designation of UAVs) and the possibility of using in agriculture (agrodrone). The year 2015 was proclaimed (Fortune Magazine, 2016) as the year of increasing and widespread use of UAVs in various areas of human activity, especially in agriculture and forestry (75% of use). This is important for large farm areas, where UAV has many useful functions and a very cost-effective commercial application. Today, the needs for UAVs have increased sharply with various opportunities for both civilian and military needs. There is also a significant interest in the development of new drones that can autonomously fly in different environments and locations and can perform various missions and tasks. Over the past decade, a wide range of applications for drones has gained the significance that led to the discovery of various types of unmanned UAVs of different sizes and weights. In this review, the classification of UAVs ranging based on a detailed overview of the development of the drone industry in recent years, this paper demonstrates the evolution of drones and differents application technologies. Of course, this development is very advanced and revolutionary, as well as the development of mobile and smart phones and the Internet, which will open the way for many users to participate in defining the future of UAV implementation. LIVONA Company, Belgrade, Serbia (and Institute of Agricultural Engineering, Faculty of Agriculture in Belgrade, in tehnical cooperation) has a study and plans on the implementation of the model micro drone EBee SQ Livona RTK in the future general plans for inspection of protection Soils of territory Minicipality of Stara Pazova (351 km2), and agricultural company Napredak, and exspecially plans for soils of agriculture of R. Serbia. VEKOM GeoCompany from Belgrade, (in cooperation with Institute of Agricultural Engineering, Faculty of Agriculture in Belgrade), has a study and plans on the implementation of the model of the drone Aibot KX6 model, in the future of application of agricultural soils of region Open pit Kolubara for area from app. 600 km2 and the other soils of Region). Institute of Agricultural Engineering, Faculty of Agriculture in Belgrade, in cooperation with Municipality of Ub, has a study and plans on the implementation of the model micro drone Hubsan H109S X4 PRO in the future plans general inspection of protection Soils and Waters of territory of Municipality Ub (456 km2).
AB  - U radu su analizirane mogućnosti i potrebe upotrebe specifičnih vrsta robota (mini bespilotnih letelica sa različitim dizajnom, o značane kao UAV) i način korištenja u poljoprivredi (agrodron). Časopis Fortune je 2015.godinu proglasio kao godinu sve većeg i široko rasprostranjene upotrbe UAV letelica, u različitim oblastima ljudske delatnosti, posebno u poljoprivredi i šumarstvu (75% upotrebe). Ovo je naročito važno za velike farme i oblasti pod šumama, gde UAV ima mnogo korisnih funkcija i veoma isplative komercijalne aplikacije. Danas, potrebe za UAV imaju nagli porast sa različitim mogućnostima kako za civilne tako i za vojne potrebe. Takođe postoji značajan interes za razvoj novih bespilotnih letelica koji mogu autonomno leteti u različitim okruženjima i lokacijama i obaviti različite misije i zadatke. Tokom protekle decenije XXI veka, širok spektar aplikacija za bespilotne letelice je dobio značaj koji je doveo do konstrukcija različitih tipova bespilotnih UAV, različitih veličina i težina i svakako namene. Naravno , tehnološki razvoj kod dron sistema je veoma tehničko -tehnološki napredan i revolucionaran, uz razvoj mobilnih i pametnih (android) telefona i interneta, brzo otvora puteve i mogućnosti za mnoge korisnike u definisanju nove budućnosti implementacije UAV različitim oblastima primene. Kompanija Livona d.o.o., Beograd i Institut za poljoprivrednu tehniku, Poljoprivredni fakultet u Beogradu, u tehničkoj saradnji imaju planove o implementaciji modela mikro drona EBee SK Livona RTK u narednim generalnim planovima za inspekciju, zaštitu i korišćenje poljoprivrednih zemljišta Republike Srbije, i posebno teritorije Opštine Stara Pazova (351 km2), gde je posebno mesto poljoprivrednog preduzeća Napredak a.d. VekomGeo d.o.o, Beograd u saradnji sa Institutom za poljoprivrednu tehniku Poljoprivrednog fakulteta u Beogradu ima planove o budućoj upotrebi drona model Aibot X6, za nadzor na površinama od 600 km2 (i poljoprivredna zemljišta) otvorenog kopa R.B. Kolubara ili drugih objekata. Institut za poljoprivrednu tehniku, Poljoprivredni fakultet u Beogradu, ima planove o saradnji sa opštino m Ub, zbog upotrebe modela mikro drona Hubsan H109S Ks4 PRO u inspekciji oko zaštite i načina korišćenja zemljišta i vo da na ovoj teritoriji (456 km2).
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Design, classification, perspectives and possible applications drones in agriculture of Serbia
T1  - Dizajn, klasifikacija, perspektiva i moguća aplikacija dronova u poljoprivredu Srbije
EP  - 56
IS  - 4
SP  - 29
VL  - 43
DO  - 10.5937/PoljTeh1804029O
ER  - 

@article{
author = "Oljača, Mićo V. and Pajić, Miloš and Gligorević, Kosta and Dražić, Milan and Zlatanović, Ivan and Dimitrijević, Aleksandra and Miodragović, Rajko and Mileusnić, Zoran and Radojević, Rade and Živković, Milovan and Petrović, Dragan and Radivojević, Dušan and Urošević, Mirko and Topisirović, Goran and Radičević, Branko and Ećim, Olivera and Balać, Nebojša",
year = "2018",
abstract = "The paper analyzes the possibility and the needs for the use of specific types of robots (mini unmanned aircraft with different designs and the designation of UAVs) and the possibility of using in agriculture (agrodrone). The year 2015 was proclaimed (Fortune Magazine, 2016) as the year of increasing and widespread use of UAVs in various areas of human activity, especially in agriculture and forestry (75% of use). This is important for large farm areas, where UAV has many useful functions and a very cost-effective commercial application. Today, the needs for UAVs have increased sharply with various opportunities for both civilian and military needs. There is also a significant interest in the development of new drones that can autonomously fly in different environments and locations and can perform various missions and tasks. Over the past decade, a wide range of applications for drones has gained the significance that led to the discovery of various types of unmanned UAVs of different sizes and weights. In this review, the classification of UAVs ranging based on a detailed overview of the development of the drone industry in recent years, this paper demonstrates the evolution of drones and differents application technologies. Of course, this development is very advanced and revolutionary, as well as the development of mobile and smart phones and the Internet, which will open the way for many users to participate in defining the future of UAV implementation. LIVONA Company, Belgrade, Serbia (and Institute of Agricultural Engineering, Faculty of Agriculture in Belgrade, in tehnical cooperation) has a study and plans on the implementation of the model micro drone EBee SQ Livona RTK in the future general plans for inspection of protection Soils of territory Minicipality of Stara Pazova (351 km2), and agricultural company Napredak, and exspecially plans for soils of agriculture of R. Serbia. VEKOM GeoCompany from Belgrade, (in cooperation with Institute of Agricultural Engineering, Faculty of Agriculture in Belgrade), has a study and plans on the implementation of the model of the drone Aibot KX6 model, in the future of application of agricultural soils of region Open pit Kolubara for area from app. 600 km2 and the other soils of Region). Institute of Agricultural Engineering, Faculty of Agriculture in Belgrade, in cooperation with Municipality of Ub, has a study and plans on the implementation of the model micro drone Hubsan H109S X4 PRO in the future plans general inspection of protection Soils and Waters of territory of Municipality Ub (456 km2)., U radu su analizirane mogućnosti i potrebe upotrebe specifičnih vrsta robota (mini bespilotnih letelica sa različitim dizajnom, o značane kao UAV) i način korištenja u poljoprivredi (agrodron). Časopis Fortune je 2015.godinu proglasio kao godinu sve većeg i široko rasprostranjene upotrbe UAV letelica, u različitim oblastima ljudske delatnosti, posebno u poljoprivredi i šumarstvu (75% upotrebe). Ovo je naročito važno za velike farme i oblasti pod šumama, gde UAV ima mnogo korisnih funkcija i veoma isplative komercijalne aplikacije. Danas, potrebe za UAV imaju nagli porast sa različitim mogućnostima kako za civilne tako i za vojne potrebe. Takođe postoji značajan interes za razvoj novih bespilotnih letelica koji mogu autonomno leteti u različitim okruženjima i lokacijama i obaviti različite misije i zadatke. Tokom protekle decenije XXI veka, širok spektar aplikacija za bespilotne letelice je dobio značaj koji je doveo do konstrukcija različitih tipova bespilotnih UAV, različitih veličina i težina i svakako namene. Naravno , tehnološki razvoj kod dron sistema je veoma tehničko -tehnološki napredan i revolucionaran, uz razvoj mobilnih i pametnih (android) telefona i interneta, brzo otvora puteve i mogućnosti za mnoge korisnike u definisanju nove budućnosti implementacije UAV različitim oblastima primene. Kompanija Livona d.o.o., Beograd i Institut za poljoprivrednu tehniku, Poljoprivredni fakultet u Beogradu, u tehničkoj saradnji imaju planove o implementaciji modela mikro drona EBee SK Livona RTK u narednim generalnim planovima za inspekciju, zaštitu i korišćenje poljoprivrednih zemljišta Republike Srbije, i posebno teritorije Opštine Stara Pazova (351 km2), gde je posebno mesto poljoprivrednog preduzeća Napredak a.d. VekomGeo d.o.o, Beograd u saradnji sa Institutom za poljoprivrednu tehniku Poljoprivrednog fakulteta u Beogradu ima planove o budućoj upotrebi drona model Aibot X6, za nadzor na površinama od 600 km2 (i poljoprivredna zemljišta) otvorenog kopa R.B. Kolubara ili drugih objekata. Institut za poljoprivrednu tehniku, Poljoprivredni fakultet u Beogradu, ima planove o saradnji sa opštino m Ub, zbog upotrebe modela mikro drona Hubsan H109S Ks4 PRO u inspekciji oko zaštite i načina korišćenja zemljišta i vo da na ovoj teritoriji (456 km2).",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Design, classification, perspectives and possible applications drones in agriculture of Serbia, Dizajn, klasifikacija, perspektiva i moguća aplikacija dronova u poljoprivredu Srbije",
pages = "56-29",
number = "4",
volume = "43",
doi = "10.5937/PoljTeh1804029O"
}

Oljača, M. V., Pajić, M., Gligorević, K., Dražić, M., Zlatanović, I., Dimitrijević, A., Miodragović, R., Mileusnić, Z., Radojević, R., Živković, M., Petrović, D., Radivojević, D., Urošević, M., Topisirović, G., Radičević, B., Ećim, O.,& Balać, N.. (2018). Design, classification, perspectives and possible applications drones in agriculture of Serbia. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 43(4), 29-56.
https://doi.org/10.5937/PoljTeh1804029O

Oljača MV, Pajić M, Gligorević K, Dražić M, Zlatanović I, Dimitrijević A, Miodragović R, Mileusnić Z, Radojević R, Živković M, Petrović D, Radivojević D, Urošević M, Topisirović G, Radičević B, Ećim O, Balać N. Design, classification, perspectives and possible applications drones in agriculture of Serbia. in Poljoprivredna tehnika. 2018;43(4):29-56.
doi:10.5937/PoljTeh1804029O .

Oljača, Mićo V., Pajić, Miloš, Gligorević, Kosta, Dražić, Milan, Zlatanović, Ivan, Dimitrijević, Aleksandra, Miodragović, Rajko, Mileusnić, Zoran, Radojević, Rade, Živković, Milovan, Petrović, Dragan, Radivojević, Dušan, Urošević, Mirko, Topisirović, Goran, Radičević, Branko, Ećim, Olivera, Balać, Nebojša, "Design, classification, perspectives and possible applications drones in agriculture of Serbia" in Poljoprivredna tehnika, 43, no. 4 (2018):29-56,
https://doi.org/10.5937/PoljTeh1804029O . .

TY  - JOUR
AU  - Cerović, Vera B.
AU  - Petrović, Dragan
AU  - Radojević, Rade
AU  - Barać, Saša
AU  - Vuković, Aleksandar
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4833
AB  - At present, spreading of mineral fertilizers in Europe is most commonly performed using centrifugal disk spreaders with attached vanes. The motion of an ideal spherical homogeneous fertilizer particle along the straight vane attached to a flat rotating disc was analyzed in this paper. The analysis was performed in the non-inertial reference coordinate system. From the assumptions introduced to enable analytical describing of the real particle motion as well as the general tools of solid mechanics, the ordinary in-homogenous second-order differential equation having constant coefficients arose. Its solution represents an approximation of the real relative motion of the fertilizer particle along the straight radial vane fixed to the flat horizontal disc rotating at a constant angular velocity. However, the solution of this kind can be very useful for the optimization of centrifugal spreader working parameters.
AB  - U Evropi se za rasipanje granularnog mineralnog đubriva najčešće koriste centrifugalni rasipači sa lopaticama. U ovom radu je analizirano kretanje idealne, loptaste, homogene granule đubriva duž lopatica postavljenih po rotirajućem disku. Analiza je izvedena primenom neinercijalnog referentnog koordinatnog sistema. Uvođenjem određenih pretpostavki i primenom zakona teorijske mehanike za opisivanje kretanja čestice, formirana je nehomogena diferencijalna jednačina drugog reda sa konstantnim koeficijentima. Njeno rešenje aproksimira realno relativno kretanje čestice đubriva duž ravnih radijalnih lopatica pričvršćenih za horizontalni disk, koji se obrće konstantnom ugaonom brzinom. Dobijeno rešenje se svakako može koristiti za optimizaciju radnih parametara centrifugalnog rasipača sa diskom.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd
T2  - Journal of Agricultural Sciences (Belgrade)
T1  - On the fertilizer particle motion along the vane of a centrifugal spreader disc assuming pure sliding of the particle
T1  - Kretanje čestice đubriva duž lopatice centrifugalnog rasipača sa diskom pretpostavljajući čisto klizanje čestice
EP  - 97
IS  - 1
SP  - 83
VL  - 63
DO  - 10.2298/JAS1801083C
ER  - 

@article{
author = "Cerović, Vera B. and Petrović, Dragan and Radojević, Rade and Barać, Saša and Vuković, Aleksandar",
year = "2018",
abstract = "At present, spreading of mineral fertilizers in Europe is most commonly performed using centrifugal disk spreaders with attached vanes. The motion of an ideal spherical homogeneous fertilizer particle along the straight vane attached to a flat rotating disc was analyzed in this paper. The analysis was performed in the non-inertial reference coordinate system. From the assumptions introduced to enable analytical describing of the real particle motion as well as the general tools of solid mechanics, the ordinary in-homogenous second-order differential equation having constant coefficients arose. Its solution represents an approximation of the real relative motion of the fertilizer particle along the straight radial vane fixed to the flat horizontal disc rotating at a constant angular velocity. However, the solution of this kind can be very useful for the optimization of centrifugal spreader working parameters., U Evropi se za rasipanje granularnog mineralnog đubriva najčešće koriste centrifugalni rasipači sa lopaticama. U ovom radu je analizirano kretanje idealne, loptaste, homogene granule đubriva duž lopatica postavljenih po rotirajućem disku. Analiza je izvedena primenom neinercijalnog referentnog koordinatnog sistema. Uvođenjem određenih pretpostavki i primenom zakona teorijske mehanike za opisivanje kretanja čestice, formirana je nehomogena diferencijalna jednačina drugog reda sa konstantnim koeficijentima. Njeno rešenje aproksimira realno relativno kretanje čestice đubriva duž ravnih radijalnih lopatica pričvršćenih za horizontalni disk, koji se obrće konstantnom ugaonom brzinom. Dobijeno rešenje se svakako može koristiti za optimizaciju radnih parametara centrifugalnog rasipača sa diskom.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd",
journal = "Journal of Agricultural Sciences (Belgrade)",
title = "On the fertilizer particle motion along the vane of a centrifugal spreader disc assuming pure sliding of the particle, Kretanje čestice đubriva duž lopatice centrifugalnog rasipača sa diskom pretpostavljajući čisto klizanje čestice",
pages = "97-83",
number = "1",
volume = "63",
doi = "10.2298/JAS1801083C"
}

Cerović, V. B., Petrović, D., Radojević, R., Barać, S.,& Vuković, A.. (2018). On the fertilizer particle motion along the vane of a centrifugal spreader disc assuming pure sliding of the particle. in Journal of Agricultural Sciences (Belgrade)
Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd., 63(1), 83-97.
https://doi.org/10.2298/JAS1801083C

Cerović VB, Petrović D, Radojević R, Barać S, Vuković A. On the fertilizer particle motion along the vane of a centrifugal spreader disc assuming pure sliding of the particle. in Journal of Agricultural Sciences (Belgrade). 2018;63(1):83-97.
doi:10.2298/JAS1801083C .

Cerović, Vera B., Petrović, Dragan, Radojević, Rade, Barać, Saša, Vuković, Aleksandar, "On the fertilizer particle motion along the vane of a centrifugal spreader disc assuming pure sliding of the particle" in Journal of Agricultural Sciences (Belgrade), 63, no. 1 (2018):83-97,
https://doi.org/10.2298/JAS1801083C . .

TY  - JOUR
AU  - Mileusnić, Zoran
AU  - Radojević, Rade
AU  - Petrović, Dragan
AU  - Cerović, Vera B.
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4867
AB  - The analysis of the factors that show decisive influence on the tractors stability and the possible overturning, should preventively indicate the possible improvements of the tractor construction, in order to increase the tractor's and operator's safety. The purpose of this paper is to check the static angles of the longitudinal and lateral tractor stability, using the different methods that check the tractor stability up to the to the turnover limit. The process is based on the tractor longitudinal and lateral tilting and measurement of the reference values of the wheels heights with respect to the base. The same angles can be obtained by various analytical and numerical methods based on the Theoretical mechanics. This paper suggests on the importance of empirical data, because they are the basis for further stability analysis of the tractors, other self-propelled agricultural machines.
AB  - Analiza faktora koji pokazuju odlučujuće uticaje na stabilnost i moguća prevrtanja traktora treba preventivno da ukaže na područja njihove efiksne i sigurne primene, kao i na glavne pravce poboljšanja konstrukcije traktora radi povećanja bezbednosti traktora i rukovaoca. Cilj ovog rada predstavlja provera statičkih uglova podužne i poprečne stabilnosti traktora, primenom različitih pristupa, tako što se isti dovodi do granice prevrtanja. Sam proces se zasniva na podužnom i bočnom podizanju traktora, uz stalno merenje referentnih vrednosti kota oslonih tačaka točkova u odnosu na podlogu. Isti uglovi se mogu proceniti i primenom analitičkih i numeričkih metoda, zasnovanih na principima teorijske mehanike. Rad ukazuje i na značaj empirijskih podataka, jer su oni osnova za sve dalje analize stabilnosti traktora I drugih samohodnih poljoprivrednih mašina.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - An approach to the wheel tractor static stability analysis
T1  - Pristupi ispitivanju statičke stabilnosti traktora točkaša
EP  - 10
IS  - 2
SP  - 1
VL  - 43
DO  - 10.5937/PoljTeh1802001M
ER  - 

@article{
author = "Mileusnić, Zoran and Radojević, Rade and Petrović, Dragan and Cerović, Vera B.",
year = "2018",
abstract = "The analysis of the factors that show decisive influence on the tractors stability and the possible overturning, should preventively indicate the possible improvements of the tractor construction, in order to increase the tractor's and operator's safety. The purpose of this paper is to check the static angles of the longitudinal and lateral tractor stability, using the different methods that check the tractor stability up to the to the turnover limit. The process is based on the tractor longitudinal and lateral tilting and measurement of the reference values of the wheels heights with respect to the base. The same angles can be obtained by various analytical and numerical methods based on the Theoretical mechanics. This paper suggests on the importance of empirical data, because they are the basis for further stability analysis of the tractors, other self-propelled agricultural machines., Analiza faktora koji pokazuju odlučujuće uticaje na stabilnost i moguća prevrtanja traktora treba preventivno da ukaže na područja njihove efiksne i sigurne primene, kao i na glavne pravce poboljšanja konstrukcije traktora radi povećanja bezbednosti traktora i rukovaoca. Cilj ovog rada predstavlja provera statičkih uglova podužne i poprečne stabilnosti traktora, primenom različitih pristupa, tako što se isti dovodi do granice prevrtanja. Sam proces se zasniva na podužnom i bočnom podizanju traktora, uz stalno merenje referentnih vrednosti kota oslonih tačaka točkova u odnosu na podlogu. Isti uglovi se mogu proceniti i primenom analitičkih i numeričkih metoda, zasnovanih na principima teorijske mehanike. Rad ukazuje i na značaj empirijskih podataka, jer su oni osnova za sve dalje analize stabilnosti traktora I drugih samohodnih poljoprivrednih mašina.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "An approach to the wheel tractor static stability analysis, Pristupi ispitivanju statičke stabilnosti traktora točkaša",
pages = "10-1",
number = "2",
volume = "43",
doi = "10.5937/PoljTeh1802001M"
}

Mileusnić, Z., Radojević, R., Petrović, D.,& Cerović, V. B.. (2018). An approach to the wheel tractor static stability analysis. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 43(2), 1-10.
https://doi.org/10.5937/PoljTeh1802001M

Mileusnić Z, Radojević R, Petrović D, Cerović VB. An approach to the wheel tractor static stability analysis. in Poljoprivredna tehnika. 2018;43(2):1-10.
doi:10.5937/PoljTeh1802001M .

Mileusnić, Zoran, Radojević, Rade, Petrović, Dragan, Cerović, Vera B., "An approach to the wheel tractor static stability analysis" in Poljoprivredna tehnika, 43, no. 2 (2018):1-10,
https://doi.org/10.5937/PoljTeh1802001M . .

TY  - JOUR
AU  - Kurt, Tomantschger
AU  - Petrović, Dragan
AU  - Cerović, Vera B.
AU  - Dimitrijević, Aleksandra
AU  - Radojević, Rade L.
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4875
AB  - The paper analyzes the motion of idealized spherical homogeneous fertilizer particle along the straight vane attached to flat rotating disc. The analysis, based on the assumption on the pure rolling of the particle along the vane (without sliding), has been performed in the non-inertial reference coordinate system, which rotates together with the spreader disk. The particle motion along the vane is described by hyperbolic cosine function, which is the solution of the ordinary in-homogenous secondorder differential equation having constant coefficients. Solution of this kind represents an approximation of the real motion of fertilizer particle along the radial vane fixed to horizontal disc rotating at constant angular velocity. However, it can be very useful for optimization of centrifugal spreader design and working parameters, as well as for further analysis of the whole fertilizer spreading process that also includes particle flight.
AB  - U radu je analizirano kretanje idealizovane, loptaste, homogene čestice mineralnog đubriva duž radijalne lopatice postavljene na rotirajućem disku centrifugalnog rasipača đubriva. Analiza, zasnovana na pretpostavci o kotrljanju čestice duž lopatice bez klizanja, izvedena je u neinercijalnom referentnom koordinatnom sistemu koji rotira zajedno sa diskom za rasipanje đubriva. Kretanje čestice duž lopatice je opisano hiperboličnom kosinusnom funkcijom, koja predstavlja rešenje obične homogene diferencijalne jednačine drugog reda sa konstantnim koeficijentima, koja opisuje dinamiku čestice. Rešenje ove vrste predstavlja aproksimaciju stvarnog kretanja čestice đubriva duž lopatice diska koji rotira konstantnom ugaonom brzinom. Međutim, može biti veoma korisno za optimizaciju dizajna centrifugalnog raspršivača i njegovih radnih parametara, kao i za dalju analizu čitavog procesa rasipanja đubriva koji obuhvata i let čestice u vazduhu po napuštanju lopatice.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Prediction of a fertilizer particle motion along a vane of a centrifugal spreader disc assuming its pure rolling
T1  - Predviđanje kotrljanja čestice đubriva duž lopatice centrifugalnog rasipača sa diskom
EP  - 551
IS  - 4
SP  - 544
VL  - 46
DO  - 10.5937/fmet1804544K
ER  - 

@article{
author = "Kurt, Tomantschger and Petrović, Dragan and Cerović, Vera B. and Dimitrijević, Aleksandra and Radojević, Rade L.",
year = "2018",
abstract = "The paper analyzes the motion of idealized spherical homogeneous fertilizer particle along the straight vane attached to flat rotating disc. The analysis, based on the assumption on the pure rolling of the particle along the vane (without sliding), has been performed in the non-inertial reference coordinate system, which rotates together with the spreader disk. The particle motion along the vane is described by hyperbolic cosine function, which is the solution of the ordinary in-homogenous secondorder differential equation having constant coefficients. Solution of this kind represents an approximation of the real motion of fertilizer particle along the radial vane fixed to horizontal disc rotating at constant angular velocity. However, it can be very useful for optimization of centrifugal spreader design and working parameters, as well as for further analysis of the whole fertilizer spreading process that also includes particle flight., U radu je analizirano kretanje idealizovane, loptaste, homogene čestice mineralnog đubriva duž radijalne lopatice postavljene na rotirajućem disku centrifugalnog rasipača đubriva. Analiza, zasnovana na pretpostavci o kotrljanju čestice duž lopatice bez klizanja, izvedena je u neinercijalnom referentnom koordinatnom sistemu koji rotira zajedno sa diskom za rasipanje đubriva. Kretanje čestice duž lopatice je opisano hiperboličnom kosinusnom funkcijom, koja predstavlja rešenje obične homogene diferencijalne jednačine drugog reda sa konstantnim koeficijentima, koja opisuje dinamiku čestice. Rešenje ove vrste predstavlja aproksimaciju stvarnog kretanja čestice đubriva duž lopatice diska koji rotira konstantnom ugaonom brzinom. Međutim, može biti veoma korisno za optimizaciju dizajna centrifugalnog raspršivača i njegovih radnih parametara, kao i za dalju analizu čitavog procesa rasipanja đubriva koji obuhvata i let čestice u vazduhu po napuštanju lopatice.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Prediction of a fertilizer particle motion along a vane of a centrifugal spreader disc assuming its pure rolling, Predviđanje kotrljanja čestice đubriva duž lopatice centrifugalnog rasipača sa diskom",
pages = "551-544",
number = "4",
volume = "46",
doi = "10.5937/fmet1804544K"
}

Kurt, T., Petrović, D., Cerović, V. B., Dimitrijević, A.,& Radojević, R. L.. (2018). Prediction of a fertilizer particle motion along a vane of a centrifugal spreader disc assuming its pure rolling. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 46(4), 544-551.
https://doi.org/10.5937/fmet1804544K

Kurt T, Petrović D, Cerović VB, Dimitrijević A, Radojević RL. Prediction of a fertilizer particle motion along a vane of a centrifugal spreader disc assuming its pure rolling. in FME Transactions. 2018;46(4):544-551.
doi:10.5937/fmet1804544K .

Kurt, Tomantschger, Petrović, Dragan, Cerović, Vera B., Dimitrijević, Aleksandra, Radojević, Rade L., "Prediction of a fertilizer particle motion along a vane of a centrifugal spreader disc assuming its pure rolling" in FME Transactions, 46, no. 4 (2018):544-551,
https://doi.org/10.5937/fmet1804544K . .

TY  - JOUR
AU  - Cerović, Vera B.
AU  - Petrović, Dragan
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4866
AB  - Modern agricultural engineering involves the wide application of hydraulic and pneumatic systems for the transmission of power (energy) and control signals. This paper presents the most commonly used types of valves in hydraulic systems. In the literature, more classification of hydraulic valves is reported, according to their construction, purposes, etc., which, even within the same classification criteria, sometimes strongly differ one from the another. Therefore, this presentation is organized by principled valve assignment into four basic groups based on purpose, although there are other divisions according to the purpose of the valve. Other classifications, although present in the available literature, have not been commented in detail, due to space constraints. In this manuscript, the basic elements of the construction of the most important types of valves are described and analyzed, their most important characteristics are described, the base functional principles and technical limitations described, and the given guidelines and recommendations for their optimal application.
AB  - Efikasnu, ekonomičnu i samoodrživu savremenu poljoprivrednu tehniku teško je, pored niza drugih agroekoloških, tehničkih ekonomski i drugih zahteva, zamisliti bez širokog uključivanja manuelnih, mehaničkih, hidrauličkih, pneumatskih, električnih, analognih i digitalnih sistema upravljanja, kao i njihovih usklađenih međusobnih aktivnosti vezanih za prenos snage (energije) i upravljačkih signala. U ovom radu su prikazani najčešće korišćeni tipovi ventila u hidrauličkim sistemima. Literatura prikazuje više klasifikacija ventila, prema konstrukciji, nameni itd., pri čemu se čak i isti tip ventila nekada svrstava u različite grupe. Zato su nekada i ventili svrstani u okviru istog klasifikacionog kriterijuma, mogu međusobno značajno razlikovati. Iz navedenih razloga, ovaj prikaz je organizovan principijelnim svrstavanjem ventila u četiri osnovne grupe, prema osnovnim namenama, mada postoje i drugačije podele prema nameni ventila. Ostale klasifikacije, prisutne u dostupnoj literaturi, samo su preliminarno komentarisane. U ovom radu su opisani i analizirani osnovni elementi konstrukcije najvažnijih tipova ventila, navedene njihove najbitnije tehničko-operativne karakteristike, opisani bazni funkcionalni principi i tehnička ograničenja, te date smernice i preporuke za njihovu optimalnu primenu u poljoprivrednoj tehnici.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Control components of hydrostatic and hydraulic systems: The valves
T1  - Ventili kao upravljačke komponente hidrostatičkih sistema
EP  - 25
IS  - 3
SP  - 11
VL  - 43
DO  - 10.5937/PoljTeh1803011C
ER  - 

@article{
author = "Cerović, Vera B. and Petrović, Dragan",
year = "2018",
abstract = "Modern agricultural engineering involves the wide application of hydraulic and pneumatic systems for the transmission of power (energy) and control signals. This paper presents the most commonly used types of valves in hydraulic systems. In the literature, more classification of hydraulic valves is reported, according to their construction, purposes, etc., which, even within the same classification criteria, sometimes strongly differ one from the another. Therefore, this presentation is organized by principled valve assignment into four basic groups based on purpose, although there are other divisions according to the purpose of the valve. Other classifications, although present in the available literature, have not been commented in detail, due to space constraints. In this manuscript, the basic elements of the construction of the most important types of valves are described and analyzed, their most important characteristics are described, the base functional principles and technical limitations described, and the given guidelines and recommendations for their optimal application., Efikasnu, ekonomičnu i samoodrživu savremenu poljoprivrednu tehniku teško je, pored niza drugih agroekoloških, tehničkih ekonomski i drugih zahteva, zamisliti bez širokog uključivanja manuelnih, mehaničkih, hidrauličkih, pneumatskih, električnih, analognih i digitalnih sistema upravljanja, kao i njihovih usklađenih međusobnih aktivnosti vezanih za prenos snage (energije) i upravljačkih signala. U ovom radu su prikazani najčešće korišćeni tipovi ventila u hidrauličkim sistemima. Literatura prikazuje više klasifikacija ventila, prema konstrukciji, nameni itd., pri čemu se čak i isti tip ventila nekada svrstava u različite grupe. Zato su nekada i ventili svrstani u okviru istog klasifikacionog kriterijuma, mogu međusobno značajno razlikovati. Iz navedenih razloga, ovaj prikaz je organizovan principijelnim svrstavanjem ventila u četiri osnovne grupe, prema osnovnim namenama, mada postoje i drugačije podele prema nameni ventila. Ostale klasifikacije, prisutne u dostupnoj literaturi, samo su preliminarno komentarisane. U ovom radu su opisani i analizirani osnovni elementi konstrukcije najvažnijih tipova ventila, navedene njihove najbitnije tehničko-operativne karakteristike, opisani bazni funkcionalni principi i tehnička ograničenja, te date smernice i preporuke za njihovu optimalnu primenu u poljoprivrednoj tehnici.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Control components of hydrostatic and hydraulic systems: The valves, Ventili kao upravljačke komponente hidrostatičkih sistema",
pages = "25-11",
number = "3",
volume = "43",
doi = "10.5937/PoljTeh1803011C"
}

Cerović, V. B.,& Petrović, D.. (2018). Control components of hydrostatic and hydraulic systems: The valves. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 43(3), 11-25.
https://doi.org/10.5937/PoljTeh1803011C

Cerović VB, Petrović D. Control components of hydrostatic and hydraulic systems: The valves. in Poljoprivredna tehnika. 2018;43(3):11-25.
doi:10.5937/PoljTeh1803011C .

Cerović, Vera B., Petrović, Dragan, "Control components of hydrostatic and hydraulic systems: The valves" in Poljoprivredna tehnika, 43, no. 3 (2018):11-25,
https://doi.org/10.5937/PoljTeh1803011C . .

TY  - JOUR
AU  - Cerović, Vera B.
AU  - Petrović, Dragan
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4869
AB  - The paper presents and analyzes the hydrostatic transmission of power and motion. The most important elements of this group of systems and the possibilities of their application in agricultural technology are given. Particular attention is paid to the positive-displacement pumps that have the widest application in agricultural machinery: gear pumps with external and internal gears, vane pumps, piston-axial pumps with inclined swash plate and piston-axial pumps with inclined cylinder block. Two hydrostatic power transmission and control systems are also presented. The first is a very simple mechanical- hydraulic system of automatic leveling of self-propelled berry fruits harvester. In contrast, the other hydrostatic system is very sophisticated. It is implemented as a very complex combination of hydrostatic and mechanical power transmission subsystems, with the accompanying control digital electronic system, and is intended for the wheat harvester propulsion and steering.
AB  - U radu je prikazan i analiziran hidrostatički prenos snage i upravljanja. Navedeni su najvažniji elementi ove grupe sistema i mogućnosti njihove primene u poljoprivrednoj tehnici. Posebno pažnja je posvećena zapreminskim pumpama koje nalaze najširu primenu u poljoprivrednoj mehanizaciji: zupčastim pumpama sa spoljašnjim i unutrašnjim ozubljenjem, krilnim pumpama, klipno-aksijalnim pumpama sa nagnutom kliznom pločom i klipno-aksijalnim pumpama sa nagnutim cilindarskim blokom. Prikazana su dva hidrostatička sistema prenosa snage i upravljanja.Prvi predstavlja veoma jednostavan mehaničko-hidraulički sistem automatske nivelacije samohodnog berača jagodastog voća.Drugi predstavljeni hidrostatički sistem spada u najsavremenije sisteme koji se koriste u poljoprivrednoj mehanizaciji. Izveden je kao veoma složena kombinacija hidrostatičkog i mehaničkog prenosnika snage sa pratećim upravljačkim digitalnim elektronskim sistemom, a namenjen je pogonu žitnog kombajna.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Hydrostatic transmission systems of power and motion
T1  - Hidrostatički sistemi prenosa snage poljoprivrednih mašina - zapreminske pumpe
EP  - 21
IS  - 1
SP  - 12
VL  - 43
DO  - 10.5937/PoljTeh1801012C
ER  - 

@article{
author = "Cerović, Vera B. and Petrović, Dragan",
year = "2018",
abstract = "The paper presents and analyzes the hydrostatic transmission of power and motion. The most important elements of this group of systems and the possibilities of their application in agricultural technology are given. Particular attention is paid to the positive-displacement pumps that have the widest application in agricultural machinery: gear pumps with external and internal gears, vane pumps, piston-axial pumps with inclined swash plate and piston-axial pumps with inclined cylinder block. Two hydrostatic power transmission and control systems are also presented. The first is a very simple mechanical- hydraulic system of automatic leveling of self-propelled berry fruits harvester. In contrast, the other hydrostatic system is very sophisticated. It is implemented as a very complex combination of hydrostatic and mechanical power transmission subsystems, with the accompanying control digital electronic system, and is intended for the wheat harvester propulsion and steering., U radu je prikazan i analiziran hidrostatički prenos snage i upravljanja. Navedeni su najvažniji elementi ove grupe sistema i mogućnosti njihove primene u poljoprivrednoj tehnici. Posebno pažnja je posvećena zapreminskim pumpama koje nalaze najširu primenu u poljoprivrednoj mehanizaciji: zupčastim pumpama sa spoljašnjim i unutrašnjim ozubljenjem, krilnim pumpama, klipno-aksijalnim pumpama sa nagnutom kliznom pločom i klipno-aksijalnim pumpama sa nagnutim cilindarskim blokom. Prikazana su dva hidrostatička sistema prenosa snage i upravljanja.Prvi predstavlja veoma jednostavan mehaničko-hidraulički sistem automatske nivelacije samohodnog berača jagodastog voća.Drugi predstavljeni hidrostatički sistem spada u najsavremenije sisteme koji se koriste u poljoprivrednoj mehanizaciji. Izveden je kao veoma složena kombinacija hidrostatičkog i mehaničkog prenosnika snage sa pratećim upravljačkim digitalnim elektronskim sistemom, a namenjen je pogonu žitnog kombajna.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Hydrostatic transmission systems of power and motion, Hidrostatički sistemi prenosa snage poljoprivrednih mašina - zapreminske pumpe",
pages = "21-12",
number = "1",
volume = "43",
doi = "10.5937/PoljTeh1801012C"
}

Cerović, V. B.,& Petrović, D.. (2018). Hydrostatic transmission systems of power and motion. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 43(1), 12-21.
https://doi.org/10.5937/PoljTeh1801012C

Cerović VB, Petrović D. Hydrostatic transmission systems of power and motion. in Poljoprivredna tehnika. 2018;43(1):12-21.
doi:10.5937/PoljTeh1801012C .

Cerović, Vera B., Petrović, Dragan, "Hydrostatic transmission systems of power and motion" in Poljoprivredna tehnika, 43, no. 1 (2018):12-21,
https://doi.org/10.5937/PoljTeh1801012C . .

TY  - JOUR
AU  - Tomantschger, Kurt
AU  - Petrović, Dragan
AU  - Radojević, Rade
AU  - Golubović, Zorana Z.
AU  - Tadić, Vjekoslav
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4341
AB  - Many filtration systems employing perlite granulations have been designed so far. Size distribution of perlite particles directly influences the retention properties of filter media. The information on the size distribution of perlite particles, used in each specific dead-end filtration process (the flow of fluid being filtered is perpendicular to the surface of filter medium), is crucial for the adequate design of filter medium. In order to facilitate the design of filter systems possessing filter media of this kind, a new and particular mathematical model has been developed for this present study. It is based on an appropriate partial differential equation and additional mathematical conditions, whose solution is an exponential function describing the probability density distribution of perlite particle sizes. The formulated model was experimentally verified by measuring the particle sizes of a perlite granulation using the morphometric method, based on the application of a standard light microscope and digital image analysis software. The fitting procedure of experimental data gave acceptable values of accuracy parameters - high R-square factor (R-2 = 0,905) and small value of the root-mean square error (MSE = 0,490).
PB  - Univ Osijek, Tech Fac, Slavonski Brod
T2  - Tehnički vjesnik-Technical Gazette
T1  - One-dimensional diffusion equation for the particle size distribution of perlite filter granulation
EP  - 948
IS  - 3
SP  - 943
VL  - 24
DO  - 10.17559/TV-20151202204533
ER  - 

@article{
author = "Tomantschger, Kurt and Petrović, Dragan and Radojević, Rade and Golubović, Zorana Z. and Tadić, Vjekoslav",
year = "2017",
abstract = "Many filtration systems employing perlite granulations have been designed so far. Size distribution of perlite particles directly influences the retention properties of filter media. The information on the size distribution of perlite particles, used in each specific dead-end filtration process (the flow of fluid being filtered is perpendicular to the surface of filter medium), is crucial for the adequate design of filter medium. In order to facilitate the design of filter systems possessing filter media of this kind, a new and particular mathematical model has been developed for this present study. It is based on an appropriate partial differential equation and additional mathematical conditions, whose solution is an exponential function describing the probability density distribution of perlite particle sizes. The formulated model was experimentally verified by measuring the particle sizes of a perlite granulation using the morphometric method, based on the application of a standard light microscope and digital image analysis software. The fitting procedure of experimental data gave acceptable values of accuracy parameters - high R-square factor (R-2 = 0,905) and small value of the root-mean square error (MSE = 0,490).",
publisher = "Univ Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnički vjesnik-Technical Gazette",
title = "One-dimensional diffusion equation for the particle size distribution of perlite filter granulation",
pages = "948-943",
number = "3",
volume = "24",
doi = "10.17559/TV-20151202204533"
}

Tomantschger, K., Petrović, D., Radojević, R., Golubović, Z. Z.,& Tadić, V.. (2017). One-dimensional diffusion equation for the particle size distribution of perlite filter granulation. in Tehnički vjesnik-Technical Gazette
Univ Osijek, Tech Fac, Slavonski Brod., 24(3), 943-948.
https://doi.org/10.17559/TV-20151202204533

Tomantschger K, Petrović D, Radojević R, Golubović ZZ, Tadić V. One-dimensional diffusion equation for the particle size distribution of perlite filter granulation. in Tehnički vjesnik-Technical Gazette. 2017;24(3):943-948.
doi:10.17559/TV-20151202204533 .

Tomantschger, Kurt, Petrović, Dragan, Radojević, Rade, Golubović, Zorana Z., Tadić, Vjekoslav, "One-dimensional diffusion equation for the particle size distribution of perlite filter granulation" in Tehnički vjesnik-Technical Gazette, 24, no. 3 (2017):943-948,
https://doi.org/10.17559/TV-20151202204533 . .

TY  - JOUR
AU  - Petrović, Dragan
AU  - Urošević, Mirko
AU  - Radojević, Rade
AU  - Mileusnić, Zoran
AU  - Petrović, Srbobran
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4581
AB  - Problems related to self-propelled harvester stability during mechanized berry fruits harvesting at sloped terrains are analysed in this manuscript. The paper also presents an automatic leveling system of the raspberry and blackberry harvester. Low cost, simple design, reliability and minimized maintenance make it very suitable for berryfruits harvesters applied on terrains distant from service centres. The whole system, as well as its components, is designed and manufactured in Serbia.
AB  - U radu su analizirani problemi vezani za stabilnost samohodnog berača pri mehanizovanoj berbi jagodastog voća na nagnutim terenima. Prikazano je rešenje automatske nivelacije berača plodova maline i kupine. Zahvaljujući niskoj ceni, jednostavnosti konstrukcije, visokoj pouzdanosti, uprošćenom i minimalizovanom održavanju, rešenje je posebno pogodno za manje zasade udaljene od servisnih centara. Opisane su komponente sistema, njihova namena i međusobna funkcionalna povezanost. Od posebnog značaja su činjenice da je sistem nivelacije, kao i njegove komponente, projektovan i proizvedene u našoj zemlji.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Developing the hydraulic automatic leveling system of berry fruit harvester
T1  - Razvoj hidrauličko-mehaničkog sistema automatske nivelacije berača maline i kupine
EP  - 10
IS  - 2
SP  - 1
VL  - 42
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_4581
ER  - 

@article{
author = "Petrović, Dragan and Urošević, Mirko and Radojević, Rade and Mileusnić, Zoran and Petrović, Srbobran",
year = "2017",
abstract = "Problems related to self-propelled harvester stability during mechanized berry fruits harvesting at sloped terrains are analysed in this manuscript. The paper also presents an automatic leveling system of the raspberry and blackberry harvester. Low cost, simple design, reliability and minimized maintenance make it very suitable for berryfruits harvesters applied on terrains distant from service centres. The whole system, as well as its components, is designed and manufactured in Serbia., U radu su analizirani problemi vezani za stabilnost samohodnog berača pri mehanizovanoj berbi jagodastog voća na nagnutim terenima. Prikazano je rešenje automatske nivelacije berača plodova maline i kupine. Zahvaljujući niskoj ceni, jednostavnosti konstrukcije, visokoj pouzdanosti, uprošćenom i minimalizovanom održavanju, rešenje je posebno pogodno za manje zasade udaljene od servisnih centara. Opisane su komponente sistema, njihova namena i međusobna funkcionalna povezanost. Od posebnog značaja su činjenice da je sistem nivelacije, kao i njegove komponente, projektovan i proizvedene u našoj zemlji.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Developing the hydraulic automatic leveling system of berry fruit harvester, Razvoj hidrauličko-mehaničkog sistema automatske nivelacije berača maline i kupine",
pages = "10-1",
number = "2",
volume = "42",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_4581"
}

Petrović, D., Urošević, M., Radojević, R., Mileusnić, Z.,& Petrović, S.. (2017). Developing the hydraulic automatic leveling system of berry fruit harvester. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 42(2), 1-10.
https://hdl.handle.net/21.15107/rcub_agrospace_4581

Petrović D, Urošević M, Radojević R, Mileusnić Z, Petrović S. Developing the hydraulic automatic leveling system of berry fruit harvester. in Poljoprivredna tehnika. 2017;42(2):1-10.
https://hdl.handle.net/21.15107/rcub_agrospace_4581 .

Petrović, Dragan, Urošević, Mirko, Radojević, Rade, Mileusnić, Zoran, Petrović, Srbobran, "Developing the hydraulic automatic leveling system of berry fruit harvester" in Poljoprivredna tehnika, 42, no. 2 (2017):1-10,
https://hdl.handle.net/21.15107/rcub_agrospace_4581 .

TY  - JOUR
AU  - Barać, Saša
AU  - Petrović, Dragan
AU  - Vuković, Aleksandar
AU  - Biberdžić, Milan
AU  - Djikić, A.
AU  - Djokić, Dragoslav
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4566
AB  - Proper protection and quality work of sprayer enable the optimization of the pesticide application and reduces the harmful effects on the environment and human health. The efficiency of the implemented protection is reflected in several aspects, and one of the most important is the quality of the work of sprayers, that is, the equality of pesticides distribution with nozzles. The paper presents an analysis and comparison of test results in the framework of the inspection of field crop sprayers in the exploitation conditions of central Serbia, in accordance with European standards EN 13790, which prescribes methods and equipment for inspection. The aim of the research was to determine the quality of the work of chests and the uniformity of the flow of various sprays, depending on the defined parameters. The test equipment used 'AAMSSALVARANI' measuring equipment, and the flow of the nozzles was measured by the SN S001 individual nozzles. On the basis of the obtained results, it was concluded that the average values of the flow of the sprayer amounted to 0.954 l min-1 (typ A), 1.169 l min-1 (typ B), or until 1.190 l min-1 (sprayer typ C), where the coefficient of variation was in the range 12.24% to 29.49%.
AB  - Pravilnom zaštitom i kvalitetnim radom prskalica omogućuje se optimizacija aplikacije pesticida i smanjuje štetni uticaj na životnu sredinu i zdravlje ljudi. Efikasnost izvedene zaštite ogleda se sa više aspekata a jedan od najznačajnijih je kvalitet rada prskalica, odnosno uniformnost distribucije pesticida rasprskivačima. Rad predstavlja analizu i upoređenje rezultata ispitivanja u sklopu inspekcijske kontrole ratarskih prskalica u eksploatacionim uslovima centralne Srbije, u skladu sa evropskim normama EN 13790 koji propisuje metode i opremu za obavljanje inspekcije. Cilj istraživanja je bio da se utvrdi kvalitet rada prsaklica i uniformnost protoka različitih rasprskivača u zavisnosti od definisanih parametara. Za ispitivanje je korišćena merna oprema 'AAMSSALVARANI', a protok rasprskivača je meren pomoću ispitivača pojedinačnih rasprskivača SN S001. Na osnovu dobijenih rezultata zaključeno je da su prosečne vrednosti protoka rasprskivača iznosile 0,954 l min-1 (tip A), 1,169 l min-1 (tip B), odnosno 1,190 l min-1 (tip C), pri čemu je koeficijent varijacije bio u rasponu 12,24% do 29,49%.
PB  - Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad
T2  - Savremena poljoprivredna tehnika
T1  - Results of the examination of field crop sprayers in the conditions of central Serbia
T1  - Rezultati ispitivanja ratarskih prskalica u uslovima centralne Srbije
EP  - 26
IS  - 1
SP  - 17
VL  - 43
DO  - 10.5937/SavPoljTeh1701017B
ER  - 

@article{
author = "Barać, Saša and Petrović, Dragan and Vuković, Aleksandar and Biberdžić, Milan and Djikić, A. and Djokić, Dragoslav",
year = "2017",
abstract = "Proper protection and quality work of sprayer enable the optimization of the pesticide application and reduces the harmful effects on the environment and human health. The efficiency of the implemented protection is reflected in several aspects, and one of the most important is the quality of the work of sprayers, that is, the equality of pesticides distribution with nozzles. The paper presents an analysis and comparison of test results in the framework of the inspection of field crop sprayers in the exploitation conditions of central Serbia, in accordance with European standards EN 13790, which prescribes methods and equipment for inspection. The aim of the research was to determine the quality of the work of chests and the uniformity of the flow of various sprays, depending on the defined parameters. The test equipment used 'AAMSSALVARANI' measuring equipment, and the flow of the nozzles was measured by the SN S001 individual nozzles. On the basis of the obtained results, it was concluded that the average values of the flow of the sprayer amounted to 0.954 l min-1 (typ A), 1.169 l min-1 (typ B), or until 1.190 l min-1 (sprayer typ C), where the coefficient of variation was in the range 12.24% to 29.49%., Pravilnom zaštitom i kvalitetnim radom prskalica omogućuje se optimizacija aplikacije pesticida i smanjuje štetni uticaj na životnu sredinu i zdravlje ljudi. Efikasnost izvedene zaštite ogleda se sa više aspekata a jedan od najznačajnijih je kvalitet rada prskalica, odnosno uniformnost distribucije pesticida rasprskivačima. Rad predstavlja analizu i upoređenje rezultata ispitivanja u sklopu inspekcijske kontrole ratarskih prskalica u eksploatacionim uslovima centralne Srbije, u skladu sa evropskim normama EN 13790 koji propisuje metode i opremu za obavljanje inspekcije. Cilj istraživanja je bio da se utvrdi kvalitet rada prsaklica i uniformnost protoka različitih rasprskivača u zavisnosti od definisanih parametara. Za ispitivanje je korišćena merna oprema 'AAMSSALVARANI', a protok rasprskivača je meren pomoću ispitivača pojedinačnih rasprskivača SN S001. Na osnovu dobijenih rezultata zaključeno je da su prosečne vrednosti protoka rasprskivača iznosile 0,954 l min-1 (tip A), 1,169 l min-1 (tip B), odnosno 1,190 l min-1 (tip C), pri čemu je koeficijent varijacije bio u rasponu 12,24% do 29,49%.",
publisher = "Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad",
journal = "Savremena poljoprivredna tehnika",
title = "Results of the examination of field crop sprayers in the conditions of central Serbia, Rezultati ispitivanja ratarskih prskalica u uslovima centralne Srbije",
pages = "26-17",
number = "1",
volume = "43",
doi = "10.5937/SavPoljTeh1701017B"
}

Barać, S., Petrović, D., Vuković, A., Biberdžić, M., Djikić, A.,& Djokić, D.. (2017). Results of the examination of field crop sprayers in the conditions of central Serbia. in Savremena poljoprivredna tehnika
Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad., 43(1), 17-26.
https://doi.org/10.5937/SavPoljTeh1701017B

Barać S, Petrović D, Vuković A, Biberdžić M, Djikić A, Djokić D. Results of the examination of field crop sprayers in the conditions of central Serbia. in Savremena poljoprivredna tehnika. 2017;43(1):17-26.
doi:10.5937/SavPoljTeh1701017B .

Barać, Saša, Petrović, Dragan, Vuković, Aleksandar, Biberdžić, Milan, Djikić, A., Djokić, Dragoslav, "Results of the examination of field crop sprayers in the conditions of central Serbia" in Savremena poljoprivredna tehnika, 43, no. 1 (2017):17-26,
https://doi.org/10.5937/SavPoljTeh1701017B . .

TY  - JOUR
AU  - Barać, Saša
AU  - Petrović, Dragan
AU  - Radojević, Rade
AU  - Tomantschger, Kurt
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4295
AB  - Proper seed distribution over area and depth is the essential condition that provides later uniform plants distribution over the vegetation space. Paper presents statistical analysis of two drills accuracy results in winter rye sowing. Experiment was done in north Kosovo, during rye sowing with two mechanical seed drills, OLT Gama and IMT 634.23. Besides the comparative analysis of the sowing results achieved by these two drills, in the paper is tested and verified the applicability of Gaussian function for analytical description of longitudinal, transverse and depth distribution of winter rye seed at the experimental plot.
AB  - Pravilna raspodela semena po površini i dubini predstavlja osnovni uslov za obezbedjenje ravnomerne raspodele biljaka u vegetacionom prostoru. U radu je predstavljena statistička analiza rezultata ispitivanja tačnosti distribucije semena dve uskoredne sejalice u setvi ozime raži. Ispitivanja su izvedena na severu Kosova, u toku setve semena raži primenom dve sejalice Olt Gama 14 i IMT 634.23. Osim komparativne analize rezultata setve koji su dobijeni primenom ove dve sejalice, u radu je testirana i proverena primenljivost Gausove funkcije za analitičko opisivanje uzdužne, poprečne i raspodele semena ozime raži po dubini na eksperimentalnoj parceli.
PB  - Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad
T2  - Savremena poljoprivredna tehnika
T1  - Seed spacing and depth in winter rye sowing
T1  - Razmak i dubina setve semena ozime raži
EP  - 10
IS  - 1
SP  - 1
VL  - 42
DO  - 10.5937/SavPoljTeh1601001B
ER  - 

@article{
author = "Barać, Saša and Petrović, Dragan and Radojević, Rade and Tomantschger, Kurt",
year = "2016",
abstract = "Proper seed distribution over area and depth is the essential condition that provides later uniform plants distribution over the vegetation space. Paper presents statistical analysis of two drills accuracy results in winter rye sowing. Experiment was done in north Kosovo, during rye sowing with two mechanical seed drills, OLT Gama and IMT 634.23. Besides the comparative analysis of the sowing results achieved by these two drills, in the paper is tested and verified the applicability of Gaussian function for analytical description of longitudinal, transverse and depth distribution of winter rye seed at the experimental plot., Pravilna raspodela semena po površini i dubini predstavlja osnovni uslov za obezbedjenje ravnomerne raspodele biljaka u vegetacionom prostoru. U radu je predstavljena statistička analiza rezultata ispitivanja tačnosti distribucije semena dve uskoredne sejalice u setvi ozime raži. Ispitivanja su izvedena na severu Kosova, u toku setve semena raži primenom dve sejalice Olt Gama 14 i IMT 634.23. Osim komparativne analize rezultata setve koji su dobijeni primenom ove dve sejalice, u radu je testirana i proverena primenljivost Gausove funkcije za analitičko opisivanje uzdužne, poprečne i raspodele semena ozime raži po dubini na eksperimentalnoj parceli.",
publisher = "Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad",
journal = "Savremena poljoprivredna tehnika",
title = "Seed spacing and depth in winter rye sowing, Razmak i dubina setve semena ozime raži",
pages = "10-1",
number = "1",
volume = "42",
doi = "10.5937/SavPoljTeh1601001B"
}

Barać, S., Petrović, D., Radojević, R.,& Tomantschger, K.. (2016). Seed spacing and depth in winter rye sowing. in Savremena poljoprivredna tehnika
Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad., 42(1), 1-10.
https://doi.org/10.5937/SavPoljTeh1601001B

Barać S, Petrović D, Radojević R, Tomantschger K. Seed spacing and depth in winter rye sowing. in Savremena poljoprivredna tehnika. 2016;42(1):1-10.
doi:10.5937/SavPoljTeh1601001B .

Barać, Saša, Petrović, Dragan, Radojević, Rade, Tomantschger, Kurt, "Seed spacing and depth in winter rye sowing" in Savremena poljoprivredna tehnika, 42, no. 1 (2016):1-10,
https://doi.org/10.5937/SavPoljTeh1601001B . .