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  - Nikolić, Ratko
AU  - Savin, Lazar
AU  - Furman, Timofej
AU  - Tomić, Milan
AU  - Simikić, Mirko
AU  - Mileusnić, Zoran
AU  - Gligorić, Radojka
AU  - Žigić, Nevenka
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3338
AB  - This paper gives the results of research on the condition and needs for engines and tractors in agriculture, water management and forestry in Serbia. It was concluded that in agriculture around 408.000 of two-axle tractors, 190.000 of single-axle tractors and around 290.000 of moto tools are used, and they have all been used for more than 15 years. Annual needs for this machinery were also determined for a period from 2014 to 2020 and it includes 21.000 of two-axle tractors, 15.000 of single-axle tractors and 15.000 of moto tools, as well as 20.000 diesel engines. This way, revitalized industry could cover 80% of all requirements. .
AB  - U radu su izloženi rezultati istraživanja u oblasti stanja i potreba za motorima i traktorima u poljoprivredi, vodoprivredi i šumarstvu Srbije. Utvrđeno je da poljoprivreda koristi oko 408 hiljada dvoosovinskih traktora, 190 hiljada jednoosovinskih i oko 290 hiljada motooruđa i prosečna starost preko 15 godina. Utvrđene su potrebe godišnje od 2014 do 2020 i to 21.000 dvoosovinskih traktora, 15.000 jednoosovinskih i 15.000 motooruđa kao i 20.000 dizel motora godišnje. Revitalizovana domaća industrija može da pokrije oko 80% svih potreba. .
PB  - Naučno društvo za pogonske mašine, traktore i održavanje, Novi Sad i Univerzitet u Novom Sadu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Novi Sad
T2  - Traktori i pogonske mašine
T1  - Engines and tractors: Condition and needs
T1  - Motori i traktori - stanje i potrebe
EP  - 27
IS  - 1
SP  - 20
VL  - 18
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3338
ER  - 

@article{
author = "Nikolić, Ratko and Savin, Lazar and Furman, Timofej and Tomić, Milan and Simikić, Mirko and Mileusnić, Zoran and Gligorić, Radojka and Žigić, Nevenka",
year = "2013",
abstract = "This paper gives the results of research on the condition and needs for engines and tractors in agriculture, water management and forestry in Serbia. It was concluded that in agriculture around 408.000 of two-axle tractors, 190.000 of single-axle tractors and around 290.000 of moto tools are used, and they have all been used for more than 15 years. Annual needs for this machinery were also determined for a period from 2014 to 2020 and it includes 21.000 of two-axle tractors, 15.000 of single-axle tractors and 15.000 of moto tools, as well as 20.000 diesel engines. This way, revitalized industry could cover 80% of all requirements. ., U radu su izloženi rezultati istraživanja u oblasti stanja i potreba za motorima i traktorima u poljoprivredi, vodoprivredi i šumarstvu Srbije. Utvrđeno je da poljoprivreda koristi oko 408 hiljada dvoosovinskih traktora, 190 hiljada jednoosovinskih i oko 290 hiljada motooruđa i prosečna starost preko 15 godina. Utvrđene su potrebe godišnje od 2014 do 2020 i to 21.000 dvoosovinskih traktora, 15.000 jednoosovinskih i 15.000 motooruđa kao i 20.000 dizel motora godišnje. Revitalizovana domaća industrija može da pokrije oko 80% svih potreba. .",
publisher = "Naučno društvo za pogonske mašine, traktore i održavanje, Novi Sad i Univerzitet u Novom Sadu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Novi Sad",
journal = "Traktori i pogonske mašine",
title = "Engines and tractors: Condition and needs, Motori i traktori - stanje i potrebe",
pages = "27-20",
number = "1",
volume = "18",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3338"
}

Nikolić, R., Savin, L., Furman, T., Tomić, M., Simikić, M., Mileusnić, Z., Gligorić, R.,& Žigić, N.. (2013). Engines and tractors: Condition and needs. in Traktori i pogonske mašine
Naučno društvo za pogonske mašine, traktore i održavanje, Novi Sad i Univerzitet u Novom Sadu - Poljoprivredni fakultet - Institut za poljoprivrednu tehniku, Novi Sad., 18(1), 20-27.
https://hdl.handle.net/21.15107/rcub_agrospace_3338

Nikolić R, Savin L, Furman T, Tomić M, Simikić M, Mileusnić Z, Gligorić R, Žigić N. Engines and tractors: Condition and needs. in Traktori i pogonske mašine. 2013;18(1):20-27.
https://hdl.handle.net/21.15107/rcub_agrospace_3338 .

Nikolić, Ratko, Savin, Lazar, Furman, Timofej, Tomić, Milan, Simikić, Mirko, Mileusnić, Zoran, Gligorić, Radojka, Žigić, Nevenka, "Engines and tractors: Condition and needs" in Traktori i pogonske mašine, 18, no. 1 (2013):20-27,
https://hdl.handle.net/21.15107/rcub_agrospace_3338 .

TY  - JOUR
AU  - Ponjičan, Ondrej
AU  - Bajkin, Andjelko
AU  - Dimitrijević, Aleksandra
AU  - Savin, Lazar
AU  - Tomić, Milan
AU  - Simikić, Mirko
AU  - Dedović, Nebojša
AU  - Zoranović, Miodrag
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2596
AB  - The aim of this paper was to analyze the influence of rotary tiller rotor rotation direction on specific work requirement (SWPTO). The SWPTO was calculated by measuring the power take-off (PTO) torque, PTO speed, working speed and depth, as well as the working width. The tillage quality was determined by the bulk density and soil structure. Reverse rotor rotation direction concept is characterized by more efficient tillage which provides significantly higher amount of macro-structure aggregates (0.25 to 10 mm) and their better distribution in the soil. Significantly lower SWPTO was observed with the reverse rotor rotation direction. It was within the range of -2.15-27.74% (14.35% on average) depending on the work speed which was 0.29 to 1.08 m s(-1). Multiple linear regression provided new equations for the calculation of SWPTO depending not only on the working parameters, but on the intensity of soil breaking and soil conditions as well. The obtained equations had high values of Coefficients of determination R-2 (0.92 to 0.99 for conventional and 0.84 to 0.93 for reverse rotor rotation direction). Reverse rotor rotation direction had lower SWPTO values which were 20.3 and 15.5% for the working speeds of 0.5 and 1.0 m s(-1), respectively, and were obtained for equal values of tillage intensity parameters.
PB  - Academic Journals, Victoria Island
T2  - African Journal of Agricultural Research
T1  - The effects of working parameters and tillage quality on rotary tiller specific work requirement
EP  - 6524
IS  - 31
SP  - 6513
VL  - 6
DO  - 10.5897/AJAR11.991
ER  - 

@article{
author = "Ponjičan, Ondrej and Bajkin, Andjelko and Dimitrijević, Aleksandra and Savin, Lazar and Tomić, Milan and Simikić, Mirko and Dedović, Nebojša and Zoranović, Miodrag",
year = "2011",
abstract = "The aim of this paper was to analyze the influence of rotary tiller rotor rotation direction on specific work requirement (SWPTO). The SWPTO was calculated by measuring the power take-off (PTO) torque, PTO speed, working speed and depth, as well as the working width. The tillage quality was determined by the bulk density and soil structure. Reverse rotor rotation direction concept is characterized by more efficient tillage which provides significantly higher amount of macro-structure aggregates (0.25 to 10 mm) and their better distribution in the soil. Significantly lower SWPTO was observed with the reverse rotor rotation direction. It was within the range of -2.15-27.74% (14.35% on average) depending on the work speed which was 0.29 to 1.08 m s(-1). Multiple linear regression provided new equations for the calculation of SWPTO depending not only on the working parameters, but on the intensity of soil breaking and soil conditions as well. The obtained equations had high values of Coefficients of determination R-2 (0.92 to 0.99 for conventional and 0.84 to 0.93 for reverse rotor rotation direction). Reverse rotor rotation direction had lower SWPTO values which were 20.3 and 15.5% for the working speeds of 0.5 and 1.0 m s(-1), respectively, and were obtained for equal values of tillage intensity parameters.",
publisher = "Academic Journals, Victoria Island",
journal = "African Journal of Agricultural Research",
title = "The effects of working parameters and tillage quality on rotary tiller specific work requirement",
pages = "6524-6513",
number = "31",
volume = "6",
doi = "10.5897/AJAR11.991"
}

Ponjičan, O., Bajkin, A., Dimitrijević, A., Savin, L., Tomić, M., Simikić, M., Dedović, N.,& Zoranović, M.. (2011). The effects of working parameters and tillage quality on rotary tiller specific work requirement. in African Journal of Agricultural Research
Academic Journals, Victoria Island., 6(31), 6513-6524.
https://doi.org/10.5897/AJAR11.991

Ponjičan O, Bajkin A, Dimitrijević A, Savin L, Tomić M, Simikić M, Dedović N, Zoranović M. The effects of working parameters and tillage quality on rotary tiller specific work requirement. in African Journal of Agricultural Research. 2011;6(31):6513-6524.
doi:10.5897/AJAR11.991 .

Ponjičan, Ondrej, Bajkin, Andjelko, Dimitrijević, Aleksandra, Savin, Lazar, Tomić, Milan, Simikić, Mirko, Dedović, Nebojša, Zoranović, Miodrag, "The effects of working parameters and tillage quality on rotary tiller specific work requirement" in African Journal of Agricultural Research, 6, no. 31 (2011):6513-6524,
https://doi.org/10.5897/AJAR11.991 . .