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  - 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  - 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  - 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  - 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 . .

TY  - CONF
AU  - Barać, Saša
AU  - Petrović, Dragan
AU  - Radojević, Rade
AU  - Biberdžić, Milan
AU  - Dikić, Aleksandar B.
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3723
AB  - Forage harvesters should chop crop mass to particles having short and uniform lengths. Length distribution of forage particles represents an important parameter for ruminant's diet formulation, especially for dairy cattle. During silage production, harvest considerations should be focused to obtaining the adequate particle size distribution of the ensiling crop particles. This paper presents the results of mining studies of three different forage harvesters at harvesting maize for silage preparation. The aim of this testing is to determine the operational characteristics and quality of the following forage harvesters Claas Jaguar 675, Zmaj 350 and John Deere 5820. The average yield of the mass was about 26 t ha(-1). Based on these results, it is concluded that the losses due to cutting height range from 3.83% to 5.97%. Clear relation between working velocity of forage harvesters and losses caused by inappropriate cutting height was proved. These two parameters are directly proportional, i. e. their connection is strong (R-2 = 0.88) and linear. All three harvesters achieved fairly acceptable cut lengths of harvested maize particles. However, experimental results verify the operational supremacy of forage harvesters Class Jaguar 675 and John Deere 5820 with relation to the long used forage harvester Zmaj 350. The minimum deviation achieved for long chopped mass in relation to the setting, was recorded when storing silage with silage Claas Jaguar 675 in which the average length of chopped mass was 9.97 mm, where as for the fraction of length up to 10 mm was 69.87%.
PB  - Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb
C3  - Aktualni Zadaci Mehanizacije Poljoprivrede: Actual Tasks on Agricultural Engineering
T1  - Comparison of self propelled forage harvesters in maize harvesting
EP  - 385
SP  - 377
VL  - 43
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3723
ER  - 

@conference{
author = "Barać, Saša and Petrović, Dragan and Radojević, Rade and Biberdžić, Milan and Dikić, Aleksandar B.",
year = "2015",
abstract = "Forage harvesters should chop crop mass to particles having short and uniform lengths. Length distribution of forage particles represents an important parameter for ruminant's diet formulation, especially for dairy cattle. During silage production, harvest considerations should be focused to obtaining the adequate particle size distribution of the ensiling crop particles. This paper presents the results of mining studies of three different forage harvesters at harvesting maize for silage preparation. The aim of this testing is to determine the operational characteristics and quality of the following forage harvesters Claas Jaguar 675, Zmaj 350 and John Deere 5820. The average yield of the mass was about 26 t ha(-1). Based on these results, it is concluded that the losses due to cutting height range from 3.83% to 5.97%. Clear relation between working velocity of forage harvesters and losses caused by inappropriate cutting height was proved. These two parameters are directly proportional, i. e. their connection is strong (R-2 = 0.88) and linear. All three harvesters achieved fairly acceptable cut lengths of harvested maize particles. However, experimental results verify the operational supremacy of forage harvesters Class Jaguar 675 and John Deere 5820 with relation to the long used forage harvester Zmaj 350. The minimum deviation achieved for long chopped mass in relation to the setting, was recorded when storing silage with silage Claas Jaguar 675 in which the average length of chopped mass was 9.97 mm, where as for the fraction of length up to 10 mm was 69.87%.",
publisher = "Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb",
journal = "Aktualni Zadaci Mehanizacije Poljoprivrede: Actual Tasks on Agricultural Engineering",
title = "Comparison of self propelled forage harvesters in maize harvesting",
pages = "385-377",
volume = "43",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3723"
}

Barać, S., Petrović, D., Radojević, R., Biberdžić, M.,& Dikić, A. B.. (2015). Comparison of self propelled forage harvesters in maize harvesting. in Aktualni Zadaci Mehanizacije Poljoprivrede: Actual Tasks on Agricultural Engineering
Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb., 43, 377-385.
https://hdl.handle.net/21.15107/rcub_agrospace_3723

Barać S, Petrović D, Radojević R, Biberdžić M, Dikić AB. Comparison of self propelled forage harvesters in maize harvesting. in Aktualni Zadaci Mehanizacije Poljoprivrede: Actual Tasks on Agricultural Engineering. 2015;43:377-385.
https://hdl.handle.net/21.15107/rcub_agrospace_3723 .

Barać, Saša, Petrović, Dragan, Radojević, Rade, Biberdžić, Milan, Dikić, Aleksandar B., "Comparison of self propelled forage harvesters in maize harvesting" in Aktualni Zadaci Mehanizacije Poljoprivrede: Actual Tasks on Agricultural Engineering, 43 (2015):377-385,
https://hdl.handle.net/21.15107/rcub_agrospace_3723 .

TY  - CONF
AU  - Petrović, Dragan
AU  - Radojević, Rade
AU  - Ponjičan, Ondrej
AU  - Simikić, Mirko
AU  - Gajić, Boško
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3420
AB  - This paper presents results of dry aggregate size analysis of non-carbonate Humogley after the autumn tillage for wheat seeding. The 140 soil samples have been taken from square area of 90 m in length and 60 m in width, at depths of 0-5 cm and 5-10 cm. Structural aggregates larger than 9.5 mm were dominant in samples at depth of 0-5 cm, 51.67%. In contrast, the fractions larger than 50 mm have not been evidenced in any of acquired soil samples. This way, the regular conditions of Humogley has been confirmed and, therefore, its applicability for soil aggregate analysis and testing of the appropriate models has been verified too. Among others, presented results also show the large discrepancies of mean weight diameters of structural aggregates at different sample sites over the experimental plot. The analogue difference has been evidenced between the sample sites at depths of 0-5 cm and 5-10 cm. It follows that analysis of the representative distribution of soil structural aggregates of any plot demands analysis of large number of soil samples, acquired over the whole area of the plot.
PB  - Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb
C3  - Aktualni Zadaci Mehanizacije Poljoprivrede
T1  - Aggregate size distribution of humogley after an autumn tillage
EP  - 76
SP  - 67
VL  - 42
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3420
ER  - 

@conference{
author = "Petrović, Dragan and Radojević, Rade and Ponjičan, Ondrej and Simikić, Mirko and Gajić, Boško",
year = "2014",
abstract = "This paper presents results of dry aggregate size analysis of non-carbonate Humogley after the autumn tillage for wheat seeding. The 140 soil samples have been taken from square area of 90 m in length and 60 m in width, at depths of 0-5 cm and 5-10 cm. Structural aggregates larger than 9.5 mm were dominant in samples at depth of 0-5 cm, 51.67%. In contrast, the fractions larger than 50 mm have not been evidenced in any of acquired soil samples. This way, the regular conditions of Humogley has been confirmed and, therefore, its applicability for soil aggregate analysis and testing of the appropriate models has been verified too. Among others, presented results also show the large discrepancies of mean weight diameters of structural aggregates at different sample sites over the experimental plot. The analogue difference has been evidenced between the sample sites at depths of 0-5 cm and 5-10 cm. It follows that analysis of the representative distribution of soil structural aggregates of any plot demands analysis of large number of soil samples, acquired over the whole area of the plot.",
publisher = "Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb",
journal = "Aktualni Zadaci Mehanizacije Poljoprivrede",
title = "Aggregate size distribution of humogley after an autumn tillage",
pages = "76-67",
volume = "42",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3420"
}

Petrović, D., Radojević, R., Ponjičan, O., Simikić, M.,& Gajić, B.. (2014). Aggregate size distribution of humogley after an autumn tillage. in Aktualni Zadaci Mehanizacije Poljoprivrede
Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb., 42, 67-76.
https://hdl.handle.net/21.15107/rcub_agrospace_3420

Petrović D, Radojević R, Ponjičan O, Simikić M, Gajić B. Aggregate size distribution of humogley after an autumn tillage. in Aktualni Zadaci Mehanizacije Poljoprivrede. 2014;42:67-76.
https://hdl.handle.net/21.15107/rcub_agrospace_3420 .

Petrović, Dragan, Radojević, Rade, Ponjičan, Ondrej, Simikić, Mirko, Gajić, Boško, "Aggregate size distribution of humogley after an autumn tillage" in Aktualni Zadaci Mehanizacije Poljoprivrede, 42 (2014):67-76,
https://hdl.handle.net/21.15107/rcub_agrospace_3420 .

TY  - JOUR
AU  - Koprivica, Ranko
AU  - Veljković, Biljana
AU  - Turan, Jan
AU  - Pajić, Miloš
AU  - Miodragović, Rajko
AU  - Radojević, Rade
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3566
AB  - The biggest problem in seed birdsfoot trefoil harvest is pod cracking before and during harvest. At full maturity, birdsfoot trefoil pods crack easily, resulting in seed spillage and hence seed losses. The cracking pod problem significantly limits the successful production of seeds. Exploitation indices, operational performance and reliability of a used general-purpose Claas Mercator 50 combine harvester in harvesting birdsfoot trefoil seed were studied. The testing was carried out in field conditions in Western Serbia area. The losses of grain over the cutter bar and over the threshing machine were found out.Total header and thresher losses ranged from 21.28% to 23.86% at an operating speed of 2.04 km/h and 2.63 km/h, respectively. This is an expected result for the crop under increased crop moisture conditions. There was loss of operating time i.e. congestion of unharvested grain due to increased operating rate, seed moisture and straw. Time consumption for elimination of harvesting delay at a rate of 2.63 km/h was higher than at a rate of 2.04 km/h and accounted for 13.48% of the total operating time. The research also involved monitoring of intensity pod cracking during the day depending on air temperature. Birdsfoot trefoil pod opening intensity increased of starts after 11 a.m. at air temperatures over 30 0 C when 80-90% of pods crack at 17- 20% moisture.
AB  - U žetvi semena žutog zvezdana najveći problem predstavlja otvaranje mahuna pre i toku žetve. U punoj zrelosti mahune žutog zvezdana lako se otvaraju i seme se prosipa što dovodi do gubitaka. Problem otvaranja mahuna u značajnoj meri limitira uspešnu proizvodnju semena. Istraživani su eksplatacioni pokazatelji, kvalitet rada i pouzdanost starog univerzalnog žitnog kombajna 'Claas Mercator 50' u žetvi semena žutog zvezdana. Ispitivanje je obavljeno u poljskim uslovima Zapadne Sbije. Ustanovljeni su gubici na hederu i vršalici kombajna. Ukupni gubici hedera i vršalice na ispitivanom kombajnu iznosili su od 21,28% do 23,86% pri radnim brzinama 2,04 km/h i 2,63 km/h, što se moglo i očekivati za pomenuti kombajn i ovu kulturu u uslovima povećane vlažnosti useva. Tokom rada kombajna dolazilo je do zastoja tj. zagušenja vršidbene mase, usled povećane radna brzina, vlažnosti semena i slame. Utrošeno vreme za otklanjanje tehnoloških zastoja kod radne brzine od 2,63 km/h bilo je veće nego kod brzine od 2,04 km/h i iznosilo je 13,48% od ukupnog radnog vremena. Intenzitet pucanja u toku dana zavisno od temperature je takođe bio predmet ispitivanja ovog rada. Povećani intenzitet otvaranja mahuna počinje posle 11 sati, pri temperaturi vaduha preko 30 0 C kada se otvori 80-90% mahuna vlažnosti od 17- 20%.
PB  - Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad
T2  - Savremena poljoprivredna tehnika
T1  - Single phase harvest of birdsfoot trefoil seed by general-purpose combine harvesters
T1  - Jednofazna žetva semena žutog zvezdana univerzalnim žitnim kombajnom
EP  - 160
IS  - 3
SP  - 151
VL  - 40
DO  - 10.5937/SavPoljTeh1403151K
ER  - 

@article{
author = "Koprivica, Ranko and Veljković, Biljana and Turan, Jan and Pajić, Miloš and Miodragović, Rajko and Radojević, Rade",
year = "2014",
abstract = "The biggest problem in seed birdsfoot trefoil harvest is pod cracking before and during harvest. At full maturity, birdsfoot trefoil pods crack easily, resulting in seed spillage and hence seed losses. The cracking pod problem significantly limits the successful production of seeds. Exploitation indices, operational performance and reliability of a used general-purpose Claas Mercator 50 combine harvester in harvesting birdsfoot trefoil seed were studied. The testing was carried out in field conditions in Western Serbia area. The losses of grain over the cutter bar and over the threshing machine were found out.Total header and thresher losses ranged from 21.28% to 23.86% at an operating speed of 2.04 km/h and 2.63 km/h, respectively. This is an expected result for the crop under increased crop moisture conditions. There was loss of operating time i.e. congestion of unharvested grain due to increased operating rate, seed moisture and straw. Time consumption for elimination of harvesting delay at a rate of 2.63 km/h was higher than at a rate of 2.04 km/h and accounted for 13.48% of the total operating time. The research also involved monitoring of intensity pod cracking during the day depending on air temperature. Birdsfoot trefoil pod opening intensity increased of starts after 11 a.m. at air temperatures over 30 0 C when 80-90% of pods crack at 17- 20% moisture., U žetvi semena žutog zvezdana najveći problem predstavlja otvaranje mahuna pre i toku žetve. U punoj zrelosti mahune žutog zvezdana lako se otvaraju i seme se prosipa što dovodi do gubitaka. Problem otvaranja mahuna u značajnoj meri limitira uspešnu proizvodnju semena. Istraživani su eksplatacioni pokazatelji, kvalitet rada i pouzdanost starog univerzalnog žitnog kombajna 'Claas Mercator 50' u žetvi semena žutog zvezdana. Ispitivanje je obavljeno u poljskim uslovima Zapadne Sbije. Ustanovljeni su gubici na hederu i vršalici kombajna. Ukupni gubici hedera i vršalice na ispitivanom kombajnu iznosili su od 21,28% do 23,86% pri radnim brzinama 2,04 km/h i 2,63 km/h, što se moglo i očekivati za pomenuti kombajn i ovu kulturu u uslovima povećane vlažnosti useva. Tokom rada kombajna dolazilo je do zastoja tj. zagušenja vršidbene mase, usled povećane radna brzina, vlažnosti semena i slame. Utrošeno vreme za otklanjanje tehnoloških zastoja kod radne brzine od 2,63 km/h bilo je veće nego kod brzine od 2,04 km/h i iznosilo je 13,48% od ukupnog radnog vremena. Intenzitet pucanja u toku dana zavisno od temperature je takođe bio predmet ispitivanja ovog rada. Povećani intenzitet otvaranja mahuna počinje posle 11 sati, pri temperaturi vaduha preko 30 0 C kada se otvori 80-90% mahuna vlažnosti od 17- 20%.",
publisher = "Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad",
journal = "Savremena poljoprivredna tehnika",
title = "Single phase harvest of birdsfoot trefoil seed by general-purpose combine harvesters, Jednofazna žetva semena žutog zvezdana univerzalnim žitnim kombajnom",
pages = "160-151",
number = "3",
volume = "40",
doi = "10.5937/SavPoljTeh1403151K"
}

Koprivica, R., Veljković, B., Turan, J., Pajić, M., Miodragović, R.,& Radojević, R.. (2014). Single phase harvest of birdsfoot trefoil seed by general-purpose combine harvesters. in Savremena poljoprivredna tehnika
Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad., 40(3), 151-160.
https://doi.org/10.5937/SavPoljTeh1403151K

Koprivica R, Veljković B, Turan J, Pajić M, Miodragović R, Radojević R. Single phase harvest of birdsfoot trefoil seed by general-purpose combine harvesters. in Savremena poljoprivredna tehnika. 2014;40(3):151-160.
doi:10.5937/SavPoljTeh1403151K .

Koprivica, Ranko, Veljković, Biljana, Turan, Jan, Pajić, Miloš, Miodragović, Rajko, Radojević, Rade, "Single phase harvest of birdsfoot trefoil seed by general-purpose combine harvesters" in Savremena poljoprivredna tehnika, 40, no. 3 (2014):151-160,
https://doi.org/10.5937/SavPoljTeh1403151K . .

TY  - CONF
AU  - Radojević, Rade
AU  - Petrović, Dragan
AU  - Barać, Saša
AU  - Stojanović, B
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5536
AB  - Alfalfa is one of the most important crops for forage production. Traditional method of alfalfa conservation assumes hay preparation. However, nowadays it is also commonly processed in the form of silage and haylage. Physiological effects of forages that are included in diets depend on plant species, stage of maturity, method of preservation and diet composition. Physical characteristics of rations for ruminants are primarily influenced by dietary forage to concentrate ratio, type of forages and concentrates, and mean particle size of feeds. Length distribution of forage particles represents an important parameter for ruminant’s diet formulation, especially for dairy cattle. During silage production, harvest considerations should be focused to obtaining the adequate particle size distribution of the ensiling crop particles.
This paper presents results of testing three contemporary types of self-propelled silage harvesters applied in the alfalfa haylage preparation: Claas Jaguar 950, Krone Big X 700 and Krone Big X 500. All machines were adapted with pick-up headers. In the study are analyzed length distributions of chopped alfalfa particles. Resulting frequency distributions of produced haylage are characterised by high mass percentage of the fraction comprehending the largest particles. It is also evident that harvester Class Jaguar 950 achieved the mean chopping length closest to preset value.
C3  - International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia
T1  - Cut Length Distributions of Haylage Particles
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5536
ER  - 

@conference{
author = "Radojević, Rade and Petrović, Dragan and Barać, Saša and Stojanović, B",
year = "2014",
abstract = "Alfalfa is one of the most important crops for forage production. Traditional method of alfalfa conservation assumes hay preparation. However, nowadays it is also commonly processed in the form of silage and haylage. Physiological effects of forages that are included in diets depend on plant species, stage of maturity, method of preservation and diet composition. Physical characteristics of rations for ruminants are primarily influenced by dietary forage to concentrate ratio, type of forages and concentrates, and mean particle size of feeds. Length distribution of forage particles represents an important parameter for ruminant’s diet formulation, especially for dairy cattle. During silage production, harvest considerations should be focused to obtaining the adequate particle size distribution of the ensiling crop particles.
This paper presents results of testing three contemporary types of self-propelled silage harvesters applied in the alfalfa haylage preparation: Claas Jaguar 950, Krone Big X 700 and Krone Big X 500. All machines were adapted with pick-up headers. In the study are analyzed length distributions of chopped alfalfa particles. Resulting frequency distributions of produced haylage are characterised by high mass percentage of the fraction comprehending the largest particles. It is also evident that harvester Class Jaguar 950 achieved the mean chopping length closest to preset value.",
journal = "International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia",
title = "Cut Length Distributions of Haylage Particles",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5536"
}

Radojević, R., Petrović, D., Barać, S.,& Stojanović, B.. (2014). Cut Length Distributions of Haylage Particles. in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia.
https://hdl.handle.net/21.15107/rcub_agrospace_5536

Radojević R, Petrović D, Barać S, Stojanović B. Cut Length Distributions of Haylage Particles. in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia. 2014;.
https://hdl.handle.net/21.15107/rcub_agrospace_5536 .

Radojević, Rade, Petrović, Dragan, Barać, Saša, Stojanović, B, "Cut Length Distributions of Haylage Particles" in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia (2014),
https://hdl.handle.net/21.15107/rcub_agrospace_5536 .

TY  - CONF
AU  - Barać, Saša
AU  - Radojević, Rade
AU  - Petrović, Dragan
AU  - Vuković, A
AU  - Biberdzić, M
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5544
AB  - The paper presents testing results of three silage combines employed in maize silage preparation in Toplica region. It is focused on determination of technical working parameters of tested machines. Achieved results verified the superiority of silage combine John Deere 5820, which produced the chopped mass having particle lengths of the smallest deviation with respect to the preset cutting length. In this case, the average length of chopped mass was 9.9 mm, having 69 % mass in the range up to 8 mm. The other two silage combines produced lower mass percentage of this fraction and larger variations of particle lengths with respect to the preset length. Minimum mass flow rate was evidenced for the silage combine Fortschrit E-286: 7.3 kg s-1 (26.3 t h-1) and the surface productivity of 0.83 ha h-1, at the average speed of 4.0 km h-1. Maximum production rate was achieved with silage combine John Deere 5820: 10.9 kg s-1 (39.1 t h-1) at average working velocity of 4.7 km h-1 and surface efficiency of 1.21 ha h-1.
C3  - International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia
T1  - Combines Work Quality in Maize Silage Production
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5544
ER  - 

@conference{
author = "Barać, Saša and Radojević, Rade and Petrović, Dragan and Vuković, A and Biberdzić, M",
year = "2014",
abstract = "The paper presents testing results of three silage combines employed in maize silage preparation in Toplica region. It is focused on determination of technical working parameters of tested machines. Achieved results verified the superiority of silage combine John Deere 5820, which produced the chopped mass having particle lengths of the smallest deviation with respect to the preset cutting length. In this case, the average length of chopped mass was 9.9 mm, having 69 % mass in the range up to 8 mm. The other two silage combines produced lower mass percentage of this fraction and larger variations of particle lengths with respect to the preset length. Minimum mass flow rate was evidenced for the silage combine Fortschrit E-286: 7.3 kg s-1 (26.3 t h-1) and the surface productivity of 0.83 ha h-1, at the average speed of 4.0 km h-1. Maximum production rate was achieved with silage combine John Deere 5820: 10.9 kg s-1 (39.1 t h-1) at average working velocity of 4.7 km h-1 and surface efficiency of 1.21 ha h-1.",
journal = "International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia",
title = "Combines Work Quality in Maize Silage Production",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5544"
}

Barać, S., Radojević, R., Petrović, D., Vuković, A.,& Biberdzić, M.. (2014). Combines Work Quality in Maize Silage Production. in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia.
https://hdl.handle.net/21.15107/rcub_agrospace_5544

Barać S, Radojević R, Petrović D, Vuković A, Biberdzić M. Combines Work Quality in Maize Silage Production. in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia. 2014;.
https://hdl.handle.net/21.15107/rcub_agrospace_5544 .

Barać, Saša, Radojević, Rade, Petrović, Dragan, Vuković, A, Biberdzić, M, "Combines Work Quality in Maize Silage Production" in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia (2014),
https://hdl.handle.net/21.15107/rcub_agrospace_5544 .

TY  - JOUR
AU  - Radojević, Rade
AU  - Petrović, Dragan
AU  - Tomantschger, Kurt
AU  - Radojević, Mirjana
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3216
AB  - So far, many types, styles and sizes of mowing equipment has been developed and introduced in the agricultural practice. Therefore, leaf crops harvesting seems to be easier to mechanize with respect to other cultivars. However, keeping the leaf matter clean and loaded into a dryer without contaminants limits the kind of mechanization that can be used. In this paper is given a general review of Parsley (Petroselinum crispum) crops properties, possible benefits of its applications and basic principles of mechanized growing technology. In addition a simplified agroeconomical calculation of the production costs against possible income from sold vegetables, based on current prices expressed in euros is also provided. This way, the production of Parsley herbs is justified from medical, nutritive, culinary and economical points of view. Finally, results of testing three harvesters of different design, applied for collecting and preparation of parsley leaves at parcels in the region of south Banat (North Serbia) are presented and analysed. Measurements comprehended following working parameters: harvester velocity, loss of acquired crop and cutting lengths distribution of parsley leafs.
AB  - Do sada je razvijen i uveden u poljoprivrednu proizvodnju veliki broj tipova i konstrukcija mašina za košenje. Stoga se čini da je mehanizovanje žetve lisnatih useva lakše u poređenju sa ostalim kulturama. Ipak, očuvanje čistoće lisnatih useva i njihov utovar u sušare bez neželjenih kontaminanata ograničava vrstu opreme koja se može koristiti. U radu je prikazan opšti pregled opreme i postupaka za mehanizovano ubiranje peršuna (Petroselinum crispum). Na osnovu uprošćene ekonomske analize, zasnovane na tekućim cenama u Srbiji izraženim u evrima, potvrđena je opravdanost uzgoja ove poljoprivredne kulture sa ekonomske tačke gledišta. Konačno, prikazani su i analizirani rezultati uporednog testiranja tri kombajna različite konstrukcije, primenjene za sakupljanje i pripremu lišća peršuna na parcelama u regionu južnog Banata (severna Srbija). Merenjem su obuhvaćeni: brzina kombajna, gubici sakupljenog useva i raspodela dužina isečenih frakcija peršuna.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd
T2  - Poljoprivredna tehnika
T1  - Mechanized harvesting of leafy parsley crops in the region of South Banat
T1  - Mehanizovana berba peršuna u regionu Južnog Banata
EP  - 47
IS  - 1
SP  - 39
VL  - 38
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3216
ER  - 

@article{
author = "Radojević, Rade and Petrović, Dragan and Tomantschger, Kurt and Radojević, Mirjana",
year = "2013",
abstract = "So far, many types, styles and sizes of mowing equipment has been developed and introduced in the agricultural practice. Therefore, leaf crops harvesting seems to be easier to mechanize with respect to other cultivars. However, keeping the leaf matter clean and loaded into a dryer without contaminants limits the kind of mechanization that can be used. In this paper is given a general review of Parsley (Petroselinum crispum) crops properties, possible benefits of its applications and basic principles of mechanized growing technology. In addition a simplified agroeconomical calculation of the production costs against possible income from sold vegetables, based on current prices expressed in euros is also provided. This way, the production of Parsley herbs is justified from medical, nutritive, culinary and economical points of view. Finally, results of testing three harvesters of different design, applied for collecting and preparation of parsley leaves at parcels in the region of south Banat (North Serbia) are presented and analysed. Measurements comprehended following working parameters: harvester velocity, loss of acquired crop and cutting lengths distribution of parsley leafs., Do sada je razvijen i uveden u poljoprivrednu proizvodnju veliki broj tipova i konstrukcija mašina za košenje. Stoga se čini da je mehanizovanje žetve lisnatih useva lakše u poređenju sa ostalim kulturama. Ipak, očuvanje čistoće lisnatih useva i njihov utovar u sušare bez neželjenih kontaminanata ograničava vrstu opreme koja se može koristiti. U radu je prikazan opšti pregled opreme i postupaka za mehanizovano ubiranje peršuna (Petroselinum crispum). Na osnovu uprošćene ekonomske analize, zasnovane na tekućim cenama u Srbiji izraženim u evrima, potvrđena je opravdanost uzgoja ove poljoprivredne kulture sa ekonomske tačke gledišta. Konačno, prikazani su i analizirani rezultati uporednog testiranja tri kombajna različite konstrukcije, primenjene za sakupljanje i pripremu lišća peršuna na parcelama u regionu južnog Banata (severna Srbija). Merenjem su obuhvaćeni: brzina kombajna, gubici sakupljenog useva i raspodela dužina isečenih frakcija peršuna.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd",
journal = "Poljoprivredna tehnika",
title = "Mechanized harvesting of leafy parsley crops in the region of South Banat, Mehanizovana berba peršuna u regionu Južnog Banata",
pages = "47-39",
number = "1",
volume = "38",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3216"
}

Radojević, R., Petrović, D., Tomantschger, K.,& Radojević, M.. (2013). Mechanized harvesting of leafy parsley crops in the region of South Banat. in Poljoprivredna tehnika
Univerzitet u Beogradu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Beograd., 38(1), 39-47.
https://hdl.handle.net/21.15107/rcub_agrospace_3216

Radojević R, Petrović D, Tomantschger K, Radojević M. Mechanized harvesting of leafy parsley crops in the region of South Banat. in Poljoprivredna tehnika. 2013;38(1):39-47.
https://hdl.handle.net/21.15107/rcub_agrospace_3216 .

Radojević, Rade, Petrović, Dragan, Tomantschger, Kurt, Radojević, Mirjana, "Mechanized harvesting of leafy parsley crops in the region of South Banat" in Poljoprivredna tehnika, 38, no. 1 (2013):39-47,
https://hdl.handle.net/21.15107/rcub_agrospace_3216 .

TY  - CONF
AU  - Petrović, Dragan
AU  - Radojević, Rade
AU  - Vukńa, P.
AU  - Golubović, Z.Z.
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2766
PB  - 29th Danubia-Adria Symposium on Advances in Experimental Mechanics, DAS 2012
C3  - 29th Danubia - Adria Symposium on Advances in Experimental Mechanics, DAS 2012
T1  - Droplet size distributionsof conventional and air-induced nozzles
EP  - 173
SP  - 170
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2766
ER  - 

@conference{
author = "Petrović, Dragan and Radojević, Rade and Vukńa, P. and Golubović, Z.Z.",
year = "2012",
publisher = "29th Danubia-Adria Symposium on Advances in Experimental Mechanics, DAS 2012",
journal = "29th Danubia - Adria Symposium on Advances in Experimental Mechanics, DAS 2012",
title = "Droplet size distributionsof conventional and air-induced nozzles",
pages = "173-170",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2766"
}

Petrović, D., Radojević, R., Vukńa, P.,& Golubović, Z.Z.. (2012). Droplet size distributionsof conventional and air-induced nozzles. in 29th Danubia - Adria Symposium on Advances in Experimental Mechanics, DAS 2012
29th Danubia-Adria Symposium on Advances in Experimental Mechanics, DAS 2012., 170-173.
https://hdl.handle.net/21.15107/rcub_agrospace_2766

Petrović D, Radojević R, Vukńa P, Golubović Z. Droplet size distributionsof conventional and air-induced nozzles. in 29th Danubia - Adria Symposium on Advances in Experimental Mechanics, DAS 2012. 2012;:170-173.
https://hdl.handle.net/21.15107/rcub_agrospace_2766 .

Petrović, Dragan, Radojević, Rade, Vukńa, P., Golubović, Z.Z., "Droplet size distributionsof conventional and air-induced nozzles" in 29th Danubia - Adria Symposium on Advances in Experimental Mechanics, DAS 2012 (2012):170-173,
https://hdl.handle.net/21.15107/rcub_agrospace_2766 .

TY  - CONF
AU  - Petrović, Dragan
AU  - Radojević, Rade
AU  - Tomantschger, Kurt
AU  - Golubović, Z.Z.
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2836
PB  - 29th Danubia-Adria Symposium on Advances in Experimental Mechanics, DAS 2012
C3  - 29th Danubia - Adria Symposium on Advances in Experimental Mechanics, DAS 2012
T1  - The uniformity of wheat seeding over an area and depth
EP  - 169
SP  - 166
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2836
ER  - 

@conference{
author = "Petrović, Dragan and Radojević, Rade and Tomantschger, Kurt and Golubović, Z.Z.",
year = "2012",
publisher = "29th Danubia-Adria Symposium on Advances in Experimental Mechanics, DAS 2012",
journal = "29th Danubia - Adria Symposium on Advances in Experimental Mechanics, DAS 2012",
title = "The uniformity of wheat seeding over an area and depth",
pages = "169-166",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2836"
}

Petrović, D., Radojević, R., Tomantschger, K.,& Golubović, Z.Z.. (2012). The uniformity of wheat seeding over an area and depth. in 29th Danubia - Adria Symposium on Advances in Experimental Mechanics, DAS 2012
29th Danubia-Adria Symposium on Advances in Experimental Mechanics, DAS 2012., 166-169.
https://hdl.handle.net/21.15107/rcub_agrospace_2836

Petrović D, Radojević R, Tomantschger K, Golubović Z. The uniformity of wheat seeding over an area and depth. in 29th Danubia - Adria Symposium on Advances in Experimental Mechanics, DAS 2012. 2012;:166-169.
https://hdl.handle.net/21.15107/rcub_agrospace_2836 .

Petrović, Dragan, Radojević, Rade, Tomantschger, Kurt, Golubović, Z.Z., "The uniformity of wheat seeding over an area and depth" in 29th Danubia - Adria Symposium on Advances in Experimental Mechanics, DAS 2012 (2012):166-169,
https://hdl.handle.net/21.15107/rcub_agrospace_2836 .

TY  - JOUR
AU  - Petrović, Dragan
AU  - Golubović, Zoran dj.
AU  - Dajić, Zora
AU  - Tomantschger, Kurt
AU  - Radojević, Rade
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2874
AB  - The plant cell walls play an important role in defining the shape and size of the plant cell, matter flow regulation, mitigation of environmental influences and achievement of homeostasis, as well as in defense and protection against pathogens in plant tissues and organs. This paper presents an original approach to the establishment of the mathematical model based upon the former study dealing with the surface nano-roughness distribution of the model cell wall. The differential equation accompanied with the appropriate additional conditions, which describes such kind of distributions, has been formulated and presented. The developed model was tested using the already reported experimental data of an artificial cell wall, made of polysaccharides based on bacterial cellulose supplemented with xyloglucan and pectin (BCPX) that imitate properties of the natural cell wall. It has been demonstrated that proposed differential equation, has an analytical solution in the form of the normal Gaussian distribution, which describes the surface roughness of cell walls made of this material accurately.
AB  - Ćelijski zidovi biljaka imaju značajnu ulogu u definisanju oblika i veličina biljnih ćelija, kao i regulaciji razmene materija, zaštiti ćelijskih tkiva i organa od patogenih klica, ublažavanje nepovoljnih uticaja okoline itd. U ovom radu je prikazan originalni pristup formiranju matematičkog modela za opisivanje raspodele površinske nano-hrapavosti veštačkog modela ćelijskog zida. Formulisana je diferencijalna jednačina sa odgovarajućim dodatnim uslovima, koja opisuje raspodele navedenog tipa Razvijeni model je testiran koristeći postojeće (objavljene) eksperimentalne podatke merenja površinske hrapavosti veštačkih model-materijala ćelijskih zidova, izrađenih od polisaharida zasnovanih na bakterijskoj celulozi oplemenjenoj ksiloglukanom i pektinom (BCPX), koji imitira svojstva prirodnih ćelijskih zidova. Potvrđeno je da predložena diferencijalna jednačina ima analitičko rešenje u formi Gausove funkcije, koja precizno opisuje hrapavost ćelijskih zidova napravljenih od ovog materijala.
PB  - Univerzitet u Nišu, Niš
T2  - Facta universitatis - series: Mechanical Engineering
T1  - Mathematical modeling the surface roughness distribution of artificial cell wall material
T1  - Matematičko modeliranje raspodele površinske hrapavosti veštačkog ćelijskog zida
EP  - 6
IS  - 1
SP  - 1
VL  - 10
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2874
ER  - 

@article{
author = "Petrović, Dragan and Golubović, Zoran dj. and Dajić, Zora and Tomantschger, Kurt and Radojević, Rade",
year = "2012",
abstract = "The plant cell walls play an important role in defining the shape and size of the plant cell, matter flow regulation, mitigation of environmental influences and achievement of homeostasis, as well as in defense and protection against pathogens in plant tissues and organs. This paper presents an original approach to the establishment of the mathematical model based upon the former study dealing with the surface nano-roughness distribution of the model cell wall. The differential equation accompanied with the appropriate additional conditions, which describes such kind of distributions, has been formulated and presented. The developed model was tested using the already reported experimental data of an artificial cell wall, made of polysaccharides based on bacterial cellulose supplemented with xyloglucan and pectin (BCPX) that imitate properties of the natural cell wall. It has been demonstrated that proposed differential equation, has an analytical solution in the form of the normal Gaussian distribution, which describes the surface roughness of cell walls made of this material accurately., Ćelijski zidovi biljaka imaju značajnu ulogu u definisanju oblika i veličina biljnih ćelija, kao i regulaciji razmene materija, zaštiti ćelijskih tkiva i organa od patogenih klica, ublažavanje nepovoljnih uticaja okoline itd. U ovom radu je prikazan originalni pristup formiranju matematičkog modela za opisivanje raspodele površinske nano-hrapavosti veštačkog modela ćelijskog zida. Formulisana je diferencijalna jednačina sa odgovarajućim dodatnim uslovima, koja opisuje raspodele navedenog tipa Razvijeni model je testiran koristeći postojeće (objavljene) eksperimentalne podatke merenja površinske hrapavosti veštačkih model-materijala ćelijskih zidova, izrađenih od polisaharida zasnovanih na bakterijskoj celulozi oplemenjenoj ksiloglukanom i pektinom (BCPX), koji imitira svojstva prirodnih ćelijskih zidova. Potvrđeno je da predložena diferencijalna jednačina ima analitičko rešenje u formi Gausove funkcije, koja precizno opisuje hrapavost ćelijskih zidova napravljenih od ovog materijala.",
publisher = "Univerzitet u Nišu, Niš",
journal = "Facta universitatis - series: Mechanical Engineering",
title = "Mathematical modeling the surface roughness distribution of artificial cell wall material, Matematičko modeliranje raspodele površinske hrapavosti veštačkog ćelijskog zida",
pages = "6-1",
number = "1",
volume = "10",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2874"
}

Petrović, D., Golubović, Z. dj., Dajić, Z., Tomantschger, K.,& Radojević, R.. (2012). Mathematical modeling the surface roughness distribution of artificial cell wall material. in Facta universitatis - series: Mechanical Engineering
Univerzitet u Nišu, Niš., 10(1), 1-6.
https://hdl.handle.net/21.15107/rcub_agrospace_2874

Petrović D, Golubović ZD, Dajić Z, Tomantschger K, Radojević R. Mathematical modeling the surface roughness distribution of artificial cell wall material. in Facta universitatis - series: Mechanical Engineering. 2012;10(1):1-6.
https://hdl.handle.net/21.15107/rcub_agrospace_2874 .

Petrović, Dragan, Golubović, Zoran dj., Dajić, Zora, Tomantschger, Kurt, Radojević, Rade, "Mathematical modeling the surface roughness distribution of artificial cell wall material" in Facta universitatis - series: Mechanical Engineering, 10, no. 1 (2012):1-6,
https://hdl.handle.net/21.15107/rcub_agrospace_2874 .