Dokić, Dragoslav

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  • Dokić, Dragoslav (2)
  • Dokić, Dragoslav J. (1)
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The decrease of wheat yield on the plot edges - headlands due to soil compaction

Koprivica, Ranko; Dekić, Vera; Veljković, Biljana; Terzić, Dragan; Dokić, Dragoslav; Mileusnić, Zoran

(Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb, 2019)

TY  - CONF
AU  - Koprivica, Ranko
AU  - Dekić, Vera
AU  - Veljković, Biljana
AU  - Terzić, Dragan
AU  - Dokić, Dragoslav
AU  - Mileusnić, Zoran
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5096
AB  - By executing appropriate agro-technical measures in the process of production of field crops (wheat), due to the numerous passages by machines, the soil gets compacted. In the family farms in Serbia, technological processes of production of field crops comprise specific agro-technical measures, starting with distribution of fertilizers, a multi-phase soil treatment system, followed by sowing, protecting, fertilization, harvesting, transporting of grain and plant residues. Thus, in the implementation of technological operations in the production of plant crops, the land area of the plot is exposed to 10 to 15 passages by tractor and self-propelled systems. A large number of passages by machines result in the soil compaction in the centre of the plot, and especially on the edges - headlands, which negatively affects the yield of cultivated crops and leads to physical and mechanical disturbance of the structure of the soil. The aim of the research was to determine the difference in yield, plant height, spike length, 1000 grain weight and volume grain wheat in the central part of the plot in relation to the headlands of the plot. For the purpose of this paper, a trial was set up with varieties of wheat Pobeda at three sites, and the wheat yield was measured on the inner part - plot centre and the edges - headlands of the plot, with more pronounced soil compaction. During the research, in addition to the yield, the following were determined: the difference in plant height, spike length, 1000 grain weight and volume (hectolitre) grain weight in the middle plot and headlands. The yield of wheat on the inner part of the plot at all locations was above 44% to 69.06% to yield realized on the headlands. The average plant height was higher by 4.76% to 13.75%, and the spike length from 6.11% to 15.93% in the middle of the plot relative to the edges - headlands. On the inner part of the plot the weight of 1000 grains and volume weight were lower compared to the values of these properties on the edges.
PB  - Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb
C3  - Aktualni Zadaci Mehanizacije Poljoprivrede: Zbornik Radova: Actual Tasks on Agricultural Engineering
T1  - The decrease of wheat yield on the plot edges - headlands due to soil compaction
EP  - 106
SP  - 97
VL  - 47
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5096
ER  - 
@conference{
author = "Koprivica, Ranko and Dekić, Vera and Veljković, Biljana and Terzić, Dragan and Dokić, Dragoslav and Mileusnić, Zoran",
year = "2019",
abstract = "By executing appropriate agro-technical measures in the process of production of field crops (wheat), due to the numerous passages by machines, the soil gets compacted. In the family farms in Serbia, technological processes of production of field crops comprise specific agro-technical measures, starting with distribution of fertilizers, a multi-phase soil treatment system, followed by sowing, protecting, fertilization, harvesting, transporting of grain and plant residues. Thus, in the implementation of technological operations in the production of plant crops, the land area of the plot is exposed to 10 to 15 passages by tractor and self-propelled systems. A large number of passages by machines result in the soil compaction in the centre of the plot, and especially on the edges - headlands, which negatively affects the yield of cultivated crops and leads to physical and mechanical disturbance of the structure of the soil. The aim of the research was to determine the difference in yield, plant height, spike length, 1000 grain weight and volume grain wheat in the central part of the plot in relation to the headlands of the plot. For the purpose of this paper, a trial was set up with varieties of wheat Pobeda at three sites, and the wheat yield was measured on the inner part - plot centre and the edges - headlands of the plot, with more pronounced soil compaction. During the research, in addition to the yield, the following were determined: the difference in plant height, spike length, 1000 grain weight and volume (hectolitre) grain weight in the middle plot and headlands. The yield of wheat on the inner part of the plot at all locations was above 44% to 69.06% to yield realized on the headlands. The average plant height was higher by 4.76% to 13.75%, and the spike length from 6.11% to 15.93% in the middle of the plot relative to the edges - headlands. On the inner part of the plot the weight of 1000 grains and volume weight were lower compared to the values of these properties on the edges.",
publisher = "Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb",
journal = "Aktualni Zadaci Mehanizacije Poljoprivrede: Zbornik Radova: Actual Tasks on Agricultural Engineering",
title = "The decrease of wheat yield on the plot edges - headlands due to soil compaction",
pages = "106-97",
volume = "47",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5096"
}
Koprivica, R., Dekić, V., Veljković, B., Terzić, D., Dokić, D.,& Mileusnić, Z.. (2019). The decrease of wheat yield on the plot edges - headlands due to soil compaction. in Aktualni Zadaci Mehanizacije Poljoprivrede: Zbornik Radova: Actual Tasks on Agricultural Engineering
Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb., 47, 97-106.
https://hdl.handle.net/21.15107/rcub_agrospace_5096
Koprivica R, Dekić V, Veljković B, Terzić D, Dokić D, Mileusnić Z. The decrease of wheat yield on the plot edges - headlands due to soil compaction. in Aktualni Zadaci Mehanizacije Poljoprivrede: Zbornik Radova: Actual Tasks on Agricultural Engineering. 2019;47:97-106.
https://hdl.handle.net/21.15107/rcub_agrospace_5096 .
Koprivica, Ranko, Dekić, Vera, Veljković, Biljana, Terzić, Dragan, Dokić, Dragoslav, Mileusnić, Zoran, "The decrease of wheat yield on the plot edges - headlands due to soil compaction" in Aktualni Zadaci Mehanizacije Poljoprivrede: Zbornik Radova: Actual Tasks on Agricultural Engineering, 47 (2019):97-106,
https://hdl.handle.net/21.15107/rcub_agrospace_5096 .
1

Physical properties of oil rapeseed kernels at different moisture content and varietes

Koprivica, Ranko; Turan, Jan; Veljković, Biljana; Radivojević, Dušan; Bokan, Nikola; Durović, Dragan; Dokić, Dragoslav; Balalić, Igor

(Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb, 2018)

TY  - CONF
AU  - Koprivica, Ranko
AU  - Turan, Jan
AU  - Veljković, Biljana
AU  - Radivojević, Dušan
AU  - Bokan, Nikola
AU  - Durović, Dragan
AU  - Dokić, Dragoslav
AU  - Balalić, Igor
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4707
AB  - The physical properties of the three common cultivars were evaluated as a function of seed moisture content, which varied from 6.04 - 21.17%, from 5.82 - 20.90% and from 5.98 - 20.46% in 'Banacanka', 'Jasna' and 'Slavica', respectively. Results of thousand-seed weight increased from 4.18 g to 4.94 g in 'Banacanka', from 4.74 g to 5.61 g in 'Jasna', and from 4.11 to 4.81 g in 'Slavica'. The seed volume of 'Jasna' ranged between 4.72 mm(3) and 5.49 mm(3), and it was significantly higher than that of 'Banacanka' and 'Slavica' (4.07 - 4.93 mm(3) and 4.12 - 4.81 mm(3), respectively). The bulk density of 'Jasna' seeds was significantly lower than in other cultivars. Depending on seed moisture content, seed density decreased from 1023.18 kgm(-3) to 996.97 kgm(-3) in 'Banacanka', from 1009.31 to 992.70 kgm(-3) in 'Jasna', and from 1012.96-992 kgm(-3) in 'Slavica'. Porosity increased with increasing seed moisture content in all cultivars. The porosity of 'Jasna' seeds (35.97-38.43%) was higher than that of 'Banacanka' (35.42-38.23%) and 'Slavica' (35.19-37.07%) seeds. At different seed moisture levels, bulk density varied from 665.82 to 615.84 kgm(-3) in 'Banacanka', from 646.24 to 611.22 kgm(-3) in 'Jasna', and from 656.57 to 624.66 kgm(-3) in 'Slavica'. The static angle of repose in 'Banacanka', 'Jasna' and 'Slavica' ranged from 22.96 degrees to 28.05 degrees, from 24.64 degrees to 29.66 degrees and from 24.63 degrees to 29.61 degrees at moisture contents increasing. The dynamic angle of repose was highest in 'Jasna' (20.32-25.90 degrees), followed by 'Slavica' (21.03-25.58 degrees), and lowest in 'Banacanka' (19.22-24.66 degrees). Increasing seed moisture content was found to increase the friction coefficient. The static friction coefficient of cvs. 'Jasna' and 'Slavica' was higher than for 'Banacanka'.
PB  - Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb
C3  - Actual Tasks on Agricultural Engineering
T1  - Physical properties of oil rapeseed kernels at different moisture content and varietes
EP  - 405
SP  - 397
VL  - 46
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_4707
ER  - 
@conference{
author = "Koprivica, Ranko and Turan, Jan and Veljković, Biljana and Radivojević, Dušan and Bokan, Nikola and Durović, Dragan and Dokić, Dragoslav and Balalić, Igor",
year = "2018",
abstract = "The physical properties of the three common cultivars were evaluated as a function of seed moisture content, which varied from 6.04 - 21.17%, from 5.82 - 20.90% and from 5.98 - 20.46% in 'Banacanka', 'Jasna' and 'Slavica', respectively. Results of thousand-seed weight increased from 4.18 g to 4.94 g in 'Banacanka', from 4.74 g to 5.61 g in 'Jasna', and from 4.11 to 4.81 g in 'Slavica'. The seed volume of 'Jasna' ranged between 4.72 mm(3) and 5.49 mm(3), and it was significantly higher than that of 'Banacanka' and 'Slavica' (4.07 - 4.93 mm(3) and 4.12 - 4.81 mm(3), respectively). The bulk density of 'Jasna' seeds was significantly lower than in other cultivars. Depending on seed moisture content, seed density decreased from 1023.18 kgm(-3) to 996.97 kgm(-3) in 'Banacanka', from 1009.31 to 992.70 kgm(-3) in 'Jasna', and from 1012.96-992 kgm(-3) in 'Slavica'. Porosity increased with increasing seed moisture content in all cultivars. The porosity of 'Jasna' seeds (35.97-38.43%) was higher than that of 'Banacanka' (35.42-38.23%) and 'Slavica' (35.19-37.07%) seeds. At different seed moisture levels, bulk density varied from 665.82 to 615.84 kgm(-3) in 'Banacanka', from 646.24 to 611.22 kgm(-3) in 'Jasna', and from 656.57 to 624.66 kgm(-3) in 'Slavica'. The static angle of repose in 'Banacanka', 'Jasna' and 'Slavica' ranged from 22.96 degrees to 28.05 degrees, from 24.64 degrees to 29.66 degrees and from 24.63 degrees to 29.61 degrees at moisture contents increasing. The dynamic angle of repose was highest in 'Jasna' (20.32-25.90 degrees), followed by 'Slavica' (21.03-25.58 degrees), and lowest in 'Banacanka' (19.22-24.66 degrees). Increasing seed moisture content was found to increase the friction coefficient. The static friction coefficient of cvs. 'Jasna' and 'Slavica' was higher than for 'Banacanka'.",
publisher = "Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb",
journal = "Actual Tasks on Agricultural Engineering",
title = "Physical properties of oil rapeseed kernels at different moisture content and varietes",
pages = "405-397",
volume = "46",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_4707"
}
Koprivica, R., Turan, J., Veljković, B., Radivojević, D., Bokan, N., Durović, D., Dokić, D.,& Balalić, I.. (2018). Physical properties of oil rapeseed kernels at different moisture content and varietes. in Actual Tasks on Agricultural Engineering
Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb., 46, 397-405.
https://hdl.handle.net/21.15107/rcub_agrospace_4707
Koprivica R, Turan J, Veljković B, Radivojević D, Bokan N, Durović D, Dokić D, Balalić I. Physical properties of oil rapeseed kernels at different moisture content and varietes. in Actual Tasks on Agricultural Engineering. 2018;46:397-405.
https://hdl.handle.net/21.15107/rcub_agrospace_4707 .
Koprivica, Ranko, Turan, Jan, Veljković, Biljana, Radivojević, Dušan, Bokan, Nikola, Durović, Dragan, Dokić, Dragoslav, Balalić, Igor, "Physical properties of oil rapeseed kernels at different moisture content and varietes" in Actual Tasks on Agricultural Engineering, 46 (2018):397-405,
https://hdl.handle.net/21.15107/rcub_agrospace_4707 .

Acid and Temperature Treatments Result in Increased Germination of Seeds of Three Fescue Species

Stanisavljević, Rade; Vučković, Savo; Simić, Aleksandar; Marković, Jordan P.; Lakić, Zeljko; Terzić, Dragan V.; Dokić, Dragoslav J.

(Univ Agr Sci & Veterinary Med Cluj-Napoca, Cluj-Napoca, 2012)

TY  - JOUR
AU  - Stanisavljević, Rade
AU  - Vučković, Savo
AU  - Simić, Aleksandar
AU  - Marković, Jordan P.
AU  - Lakić, Zeljko
AU  - Terzić, Dragan V.
AU  - Dokić, Dragoslav J.
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2971
AB  - Efficient germination of fescue seeds is essential for successful establishment of meadows and pastures. This research was conducted to ascertain the effects of various acid and temperature treatments on seed germination in three fescue species: Festuca rubra, F (mina, and E pratensis. Seeds from different cultivars, populations, or lots were exposed either to four concentrations of sulfuric acid at three different time intervals (12 treatments) or six different temperatures at three different time intervals (18 treatments). Despite all belonging to the genus Festuca, the seed from different species responded differently to the treatments. The three optimum treatments for E rubra seed involved soaking in a 75% solution of sulfuric acid for 20 minutes (improved the germination rate by 19%), soaking in a 50% solution of sulfuric acid for 30 minutes (improved the germination rate by 18%) and exposure to either 60 degrees C or 70 degrees C for 90 minutes (improved the germination rate by 17%). For F. ovina seed, optimal treatments included soaking seeds for either 10 or 20 minutes in a 50% sulfuric acid solution (both treatments improved germination rates by 13%) or exposing seeds for 30 minutes in a 25% sulfuric acid solution and 80 degrees C for 60 minutes (improved germination rate by 12%). Two optimal treatments were identified for F. pratensis seed. Whereas the first involved soaking the seeds in a 75% sulfuric acid solution for 30 minutes (improved germination rates by 22%), the second involved either exposing the seeds to 90 degrees C for 90 or 60 minutes, or exposing the seeds to 80 degrees C for 90 minutes (improved germination rate by 21%). Our findings indicate that if fescue seed is to be sown during the autumn (two to three months after seed collecting), treating it with acid and temperature can significantly enhance its germination.
PB  - Univ Agr Sci & Veterinary Med Cluj-Napoca, Cluj-Napoca
T2  - Notulae Botanicae Horti Agrobotanici Cluj-Napoca
T1  - Acid and Temperature Treatments Result in Increased Germination of Seeds of Three Fescue Species
EP  - 226
IS  - 2
SP  - 220
VL  - 40
DO  - 10.15835/nbha4027898
ER  - 
@article{
author = "Stanisavljević, Rade and Vučković, Savo and Simić, Aleksandar and Marković, Jordan P. and Lakić, Zeljko and Terzić, Dragan V. and Dokić, Dragoslav J.",
year = "2012",
abstract = "Efficient germination of fescue seeds is essential for successful establishment of meadows and pastures. This research was conducted to ascertain the effects of various acid and temperature treatments on seed germination in three fescue species: Festuca rubra, F (mina, and E pratensis. Seeds from different cultivars, populations, or lots were exposed either to four concentrations of sulfuric acid at three different time intervals (12 treatments) or six different temperatures at three different time intervals (18 treatments). Despite all belonging to the genus Festuca, the seed from different species responded differently to the treatments. The three optimum treatments for E rubra seed involved soaking in a 75% solution of sulfuric acid for 20 minutes (improved the germination rate by 19%), soaking in a 50% solution of sulfuric acid for 30 minutes (improved the germination rate by 18%) and exposure to either 60 degrees C or 70 degrees C for 90 minutes (improved the germination rate by 17%). For F. ovina seed, optimal treatments included soaking seeds for either 10 or 20 minutes in a 50% sulfuric acid solution (both treatments improved germination rates by 13%) or exposing seeds for 30 minutes in a 25% sulfuric acid solution and 80 degrees C for 60 minutes (improved germination rate by 12%). Two optimal treatments were identified for F. pratensis seed. Whereas the first involved soaking the seeds in a 75% sulfuric acid solution for 30 minutes (improved germination rates by 22%), the second involved either exposing the seeds to 90 degrees C for 90 or 60 minutes, or exposing the seeds to 80 degrees C for 90 minutes (improved germination rate by 21%). Our findings indicate that if fescue seed is to be sown during the autumn (two to three months after seed collecting), treating it with acid and temperature can significantly enhance its germination.",
publisher = "Univ Agr Sci & Veterinary Med Cluj-Napoca, Cluj-Napoca",
journal = "Notulae Botanicae Horti Agrobotanici Cluj-Napoca",
title = "Acid and Temperature Treatments Result in Increased Germination of Seeds of Three Fescue Species",
pages = "226-220",
number = "2",
volume = "40",
doi = "10.15835/nbha4027898"
}
Stanisavljević, R., Vučković, S., Simić, A., Marković, J. P., Lakić, Z., Terzić, D. V.,& Dokić, D. J.. (2012). Acid and Temperature Treatments Result in Increased Germination of Seeds of Three Fescue Species. in Notulae Botanicae Horti Agrobotanici Cluj-Napoca
Univ Agr Sci & Veterinary Med Cluj-Napoca, Cluj-Napoca., 40(2), 220-226.
https://doi.org/10.15835/nbha4027898
Stanisavljević R, Vučković S, Simić A, Marković JP, Lakić Z, Terzić DV, Dokić DJ. Acid and Temperature Treatments Result in Increased Germination of Seeds of Three Fescue Species. in Notulae Botanicae Horti Agrobotanici Cluj-Napoca. 2012;40(2):220-226.
doi:10.15835/nbha4027898 .
Stanisavljević, Rade, Vučković, Savo, Simić, Aleksandar, Marković, Jordan P., Lakić, Zeljko, Terzić, Dragan V., Dokić, Dragoslav J., "Acid and Temperature Treatments Result in Increased Germination of Seeds of Three Fescue Species" in Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 40, no. 2 (2012):220-226,
https://doi.org/10.15835/nbha4027898 . .
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