TY  - JOUR
AU  - Krga, Ivan
AU  - Simić, Aleksandar
AU  - Dželatović, Željko
AU  - Babić, Snežana
AU  - Katanski, Snežana
AU  - Roljević Nikolić, Snežana
AU  - Damjanović, Jelena
PY  - 2021
UR  - http://fiver.ifvcns.rs/handle/123456789/2518
AB  - In limited growing conditions, intercropped field peas and oats can represent a significant
source of forage rich in protein. If applied correctly, factors such as nitrogen fertilizer, the mowing phase, and sowing norms can significantly increase the productivity of these mixtures. Field trials were conducted to examine their productivity under different nitrogen levels (0, 40, 80 kg ha-1), different sowing norms/mixtures (field peas: oats—100:15%; 100:30%), and two stages of growth (full flowering, full pod formation). Nitrogen fertilizer and different sowing norms had a significant effect on the biomass, hay, and crude protein yields. On average, the highest hay yields were achieved with 80 kg ha-1 N (4.96 t ha-1), followed by 40 kg ha-1 N (4.27 t ha-1). The highest protein yields were achieved with 40 kg ha-1 ha-1 N (CP—704.1 kg ha-1), followed by 80 kg ha-1 N (CP—637.6 kg ha-1).
Sowing norm 100:30% achieved higher hay yields: 100:30%—4.82 t ha-1; 100:15%—4.44 t ha-1, while 100:15% achieved higher crude protein yields: 100:15%—730.4 kg ha-1; 100:30%—692.7 kg ha-1 on average. The costs were not significantly increased with the nitrogen fertilizer, but the net profits were increased by as much as 163%, depending on the nitrogen level and the mixture. Nitrogen fertilizer also achieves higher economic efficiency for the mixture 100:15% compared to the 100:30% mixture. Mixtures of field peas and oats outperform single-grown crops and provide cost-effective feed for a short time. Using optimal seed ratios and nitrogen fertilizer can significantly increase the productivity and profitability of the feed with minimal impact on the overall production costs.
PB  - Basel : MDPI
T2  - Agriculture (Basel)
T1  - Biomass and protein yields of field peas and oats intercrop affected by sowing norms and nitrogen fertilizer at two different stages of growth
IS  - 9
SP  - 871
VL  - 11
DO  - 10.3390/agriculture11090871
ER  - 

@article{
author = "Krga, Ivan and Simić, Aleksandar and Dželatović, Željko and Babić, Snežana and Katanski, Snežana and Roljević Nikolić, Snežana and Damjanović, Jelena",
year = "2021",
abstract = "In limited growing conditions, intercropped field peas and oats can represent a significant
source of forage rich in protein. If applied correctly, factors such as nitrogen fertilizer, the mowing phase, and sowing norms can significantly increase the productivity of these mixtures. Field trials were conducted to examine their productivity under different nitrogen levels (0, 40, 80 kg ha-1), different sowing norms/mixtures (field peas: oats—100:15%; 100:30%), and two stages of growth (full flowering, full pod formation). Nitrogen fertilizer and different sowing norms had a significant effect on the biomass, hay, and crude protein yields. On average, the highest hay yields were achieved with 80 kg ha-1 N (4.96 t ha-1), followed by 40 kg ha-1 N (4.27 t ha-1). The highest protein yields were achieved with 40 kg ha-1 ha-1 N (CP—704.1 kg ha-1), followed by 80 kg ha-1 N (CP—637.6 kg ha-1).
Sowing norm 100:30% achieved higher hay yields: 100:30%—4.82 t ha-1; 100:15%—4.44 t ha-1, while 100:15% achieved higher crude protein yields: 100:15%—730.4 kg ha-1; 100:30%—692.7 kg ha-1 on average. The costs were not significantly increased with the nitrogen fertilizer, but the net profits were increased by as much as 163%, depending on the nitrogen level and the mixture. Nitrogen fertilizer also achieves higher economic efficiency for the mixture 100:15% compared to the 100:30% mixture. Mixtures of field peas and oats outperform single-grown crops and provide cost-effective feed for a short time. Using optimal seed ratios and nitrogen fertilizer can significantly increase the productivity and profitability of the feed with minimal impact on the overall production costs.",
publisher = "Basel : MDPI",
journal = "Agriculture (Basel)",
title = "Biomass and protein yields of field peas and oats intercrop affected by sowing norms and nitrogen fertilizer at two different stages of growth",
number = "9",
pages = "871",
volume = "11",
doi = "10.3390/agriculture11090871"
}

Krga, I., Simić, A., Dželatović, Ž., Babić, S., Katanski, S., Roljević Nikolić, S.,& Damjanović, J.. (2021). Biomass and protein yields of field peas and oats intercrop affected by sowing norms and nitrogen fertilizer at two different stages of growth. in Agriculture (Basel)
Basel : MDPI., 11(9), 871.
https://doi.org/10.3390/agriculture11090871

Krga I, Simić A, Dželatović Ž, Babić S, Katanski S, Roljević Nikolić S, Damjanović J. Biomass and protein yields of field peas and oats intercrop affected by sowing norms and nitrogen fertilizer at two different stages of growth. in Agriculture (Basel). 2021;11(9):871.
doi:10.3390/agriculture11090871 .

Krga, Ivan, Simić, Aleksandar, Dželatović, Željko, Babić, Snežana, Katanski, Snežana, Roljević Nikolić, Snežana, Damjanović, Jelena, "Biomass and protein yields of field peas and oats intercrop affected by sowing norms and nitrogen fertilizer at two different stages of growth" in Agriculture (Basel), 11, no. 9 (2021):871,
https://doi.org/10.3390/agriculture11090871 . .

TY  - JOUR
AU  - Ugrinović, Milan
AU  - Zečević, Bogoljub
AU  - Girek, Zdenka
AU  - Pavlović, Suzana
AU  - Krga, Ivan
AU  - Damnjanović, Jelena
AU  - Brdar-Jokanović, Milka
PY  - 2020
UR  - http://fiver.ifvcns.rs/handle/123456789/1990
AB  - Despite numerous positive effects on the environment, increased demands, intense research, and adequate public attention, crops grown according to the principles of organic production still occupy considerably small areas. It is difficult for certified producers to decide to expand the production of certified organic vegetables. One of the reasons is the insufficiently developed growing technology of different vegetable species in accordance with the law and regulations on organic production. Intercropping, growing of subsequent crops, and application of microbiological fertilizers are considered as the most useful techniques for yield increases in sustainable growing practices. The aim of this study was to investigate the possibilities for enhancing root yield of beetroot and radish, when grown as second crops in an organic double-cropping production system. The effects of intercropping and applying microbial fertilizers on the vegetable root weights were assessed. Intercropping was with green beans, implemented by replacement series method. Two microbial fertilizers were applied, one containing selected strains of Bacillus megatherium, B. licheniformis, B. suptilis, Azotobacter chrocoocum, A. vinelandi and Derxia sp. (M1), and other with Bacillus subtilis, Azotobacter sp., Penicillium oxalicum and Fusarium sp. (M2). Intercropping and microbial fertilizers contributed to the root weight increase. The highest root weights were noted for the intercropped plants treated with M1 (beetroot, 151.8 g) and M2 (radish, 351.0 g), which was 23.5% and 15.5% higher than in the sole crop unfertilized control. The results imply combining intercropping and the appropriate microbial fertilizers as an effective strategy for increasing yields of organically grown beetroot and radish.
AB  - Uprkos brojnim pozitivnim efektima na životnu sredinu, povećanoj tražnji, intenzivnim istraživanjima i adekvatnoj pažnji javnosti, usevi uzgajani po principima organske proizvodnje i dalje zauzimaju prilično male površine. Certifikovani proizvođači teško se odlučuju na proširenje proizvodnje certifikovanog organskog povrća. Jedan od razloga je nedovoljno razvijena tehnologija gajenja različitih vrsta povrća u skladu sa Zakonom i propisima o organskoj proizvodnji. Združivanje, gajenje postrnih useva i primena mikrobioloških đubriva smatraju se najkorisnijim tehnikama za povećanje prinosa u održivim sistemima zemljoradnje. Cilj ovog istraživanja bio je da se utvrdi mogućnost povećanja prinosa korena cvekle i rotkve gajenih postrno u združenom usevu po metodama organske proizvodnje. Praćeni su efekti združivanja i primene mikrobioloških đubriva na masu korena. Združivanje cvekle i rotkve sa boranijom obavljeno je po metodi zamenjujućih serija. U ogledu su korišćena dva mikrobiološka đubriva od kojih jedno sadrži odabrane sojeve Bacillus megaterium, B. licheniformis, B. suptilis, Azotobacter chrocoocum, A. vinelandi i Derxia sp. (M1), a drugo: Bacillus subtilis, Azotobacter sp., Penicillium oxalicum i Fusarium sp. (M2). Združivanje i mikrobiološka đubriva doprineli su povećanju mase korena. Najveća masa korena zabeležena je u združenom usevu cvekle kod tretmana mikrobiološkim đubrivom M1 (151,8g) i u združenom usevu rotkve kod tretmana mikrobiološkim đubrivom M2 (351,0g), što je bilo za 23,5% i 15,5% više u poređenju sa čistim usevima na tretmanima bez đubrenja. Dobijeni rezultati pokazuju da su uporedo primenjeno združivanje i odgovarajuća mikrobiološka đubriva delotvorna strategija za postizanje većih prinosa cvekle i rotkve u organskom sistemu gajenja.
PB  - Institut za ratarstvo i povrtarstvo, Novi Sad
T2  - Ratarstvo i povrtarstvo / Field and Vegetable Crops Research
T1  - Beetroot and radish root yield in organic double-cropping production system
T1  - Prinosi korena organske cvekle i rotkve gajenih u čistom i združenom usevu
EP  - 98
IS  - 3
SP  - 93
VL  - 57
DO  - 10.5937/ratpov57-26906
ER  - 

@article{
author = "Ugrinović, Milan and Zečević, Bogoljub and Girek, Zdenka and Pavlović, Suzana and Krga, Ivan and Damnjanović, Jelena and Brdar-Jokanović, Milka",
year = "2020",
abstract = "Despite numerous positive effects on the environment, increased demands, intense research, and adequate public attention, crops grown according to the principles of organic production still occupy considerably small areas. It is difficult for certified producers to decide to expand the production of certified organic vegetables. One of the reasons is the insufficiently developed growing technology of different vegetable species in accordance with the law and regulations on organic production. Intercropping, growing of subsequent crops, and application of microbiological fertilizers are considered as the most useful techniques for yield increases in sustainable growing practices. The aim of this study was to investigate the possibilities for enhancing root yield of beetroot and radish, when grown as second crops in an organic double-cropping production system. The effects of intercropping and applying microbial fertilizers on the vegetable root weights were assessed. Intercropping was with green beans, implemented by replacement series method. Two microbial fertilizers were applied, one containing selected strains of Bacillus megatherium, B. licheniformis, B. suptilis, Azotobacter chrocoocum, A. vinelandi and Derxia sp. (M1), and other with Bacillus subtilis, Azotobacter sp., Penicillium oxalicum and Fusarium sp. (M2). Intercropping and microbial fertilizers contributed to the root weight increase. The highest root weights were noted for the intercropped plants treated with M1 (beetroot, 151.8 g) and M2 (radish, 351.0 g), which was 23.5% and 15.5% higher than in the sole crop unfertilized control. The results imply combining intercropping and the appropriate microbial fertilizers as an effective strategy for increasing yields of organically grown beetroot and radish., Uprkos brojnim pozitivnim efektima na životnu sredinu, povećanoj tražnji, intenzivnim istraživanjima i adekvatnoj pažnji javnosti, usevi uzgajani po principima organske proizvodnje i dalje zauzimaju prilično male površine. Certifikovani proizvođači teško se odlučuju na proširenje proizvodnje certifikovanog organskog povrća. Jedan od razloga je nedovoljno razvijena tehnologija gajenja različitih vrsta povrća u skladu sa Zakonom i propisima o organskoj proizvodnji. Združivanje, gajenje postrnih useva i primena mikrobioloških đubriva smatraju se najkorisnijim tehnikama za povećanje prinosa u održivim sistemima zemljoradnje. Cilj ovog istraživanja bio je da se utvrdi mogućnost povećanja prinosa korena cvekle i rotkve gajenih postrno u združenom usevu po metodama organske proizvodnje. Praćeni su efekti združivanja i primene mikrobioloških đubriva na masu korena. Združivanje cvekle i rotkve sa boranijom obavljeno je po metodi zamenjujućih serija. U ogledu su korišćena dva mikrobiološka đubriva od kojih jedno sadrži odabrane sojeve Bacillus megaterium, B. licheniformis, B. suptilis, Azotobacter chrocoocum, A. vinelandi i Derxia sp. (M1), a drugo: Bacillus subtilis, Azotobacter sp., Penicillium oxalicum i Fusarium sp. (M2). Združivanje i mikrobiološka đubriva doprineli su povećanju mase korena. Najveća masa korena zabeležena je u združenom usevu cvekle kod tretmana mikrobiološkim đubrivom M1 (151,8g) i u združenom usevu rotkve kod tretmana mikrobiološkim đubrivom M2 (351,0g), što je bilo za 23,5% i 15,5% više u poređenju sa čistim usevima na tretmanima bez đubrenja. Dobijeni rezultati pokazuju da su uporedo primenjeno združivanje i odgovarajuća mikrobiološka đubriva delotvorna strategija za postizanje većih prinosa cvekle i rotkve u organskom sistemu gajenja.",
publisher = "Institut za ratarstvo i povrtarstvo, Novi Sad",
journal = "Ratarstvo i povrtarstvo / Field and Vegetable Crops Research",
title = "Beetroot and radish root yield in organic double-cropping production system, Prinosi korena organske cvekle i rotkve gajenih u čistom i združenom usevu",
pages = "98-93",
number = "3",
volume = "57",
doi = "10.5937/ratpov57-26906"
}

Ugrinović, M., Zečević, B., Girek, Z., Pavlović, S., Krga, I., Damnjanović, J.,& Brdar-Jokanović, M.. (2020). Beetroot and radish root yield in organic double-cropping production system. in Ratarstvo i povrtarstvo / Field and Vegetable Crops Research
Institut za ratarstvo i povrtarstvo, Novi Sad., 57(3), 93-98.
https://doi.org/10.5937/ratpov57-26906

Ugrinović M, Zečević B, Girek Z, Pavlović S, Krga I, Damnjanović J, Brdar-Jokanović M. Beetroot and radish root yield in organic double-cropping production system. in Ratarstvo i povrtarstvo / Field and Vegetable Crops Research. 2020;57(3):93-98.
doi:10.5937/ratpov57-26906 .

Ugrinović, Milan, Zečević, Bogoljub, Girek, Zdenka, Pavlović, Suzana, Krga, Ivan, Damnjanović, Jelena, Brdar-Jokanović, Milka, "Beetroot and radish root yield in organic double-cropping production system" in Ratarstvo i povrtarstvo / Field and Vegetable Crops Research, 57, no. 3 (2020):93-98,
https://doi.org/10.5937/ratpov57-26906 . .

TY  - JOUR
AU  - Krga, Ivan
AU  - Simić, A.
AU  - Mandić, Violeta
AU  - Bijelić, Z.
AU  - Dželetović, Ž.Ž.
AU  - Vasiljević, Sanja
AU  - Adžić, Slađan
PY  - 2019
UR  - http://fiver.ifvcns.rs/handle/123456789/1944
AB  - Monoculture and intensive use of mechanization and inorganic chemicals are leading to degradation and erosion of our soils and agro-ecosystems. At the same time, the production of animal feeds that are rich in protein is constantly decreasing in many European countries. Modest cultivation needs, favorable content of nutrients, and beneficial effect on the environment, make field pea and oat mixtures promising crops to tackle these issues. In three growing seasons and without irrigation or fertilisation, we have examined two basic field pea cultivars (Kosmaj, OS Adam) and one leafless cultivar (OS Letin) intercropped with oat (NS Jadar), with seeding rates, field pea: oat - 100:10%; 100:20%. Results have shown that basic type cultivars have better overall development and higher yields compared to leafless cultivar, whether grown as single crops or in the mixture. Basic cultivars (OS Adam, Kosmaj) achieved higher protein content, compared to cultivar Letin, 163.9 g kg-1, 153.3 g kg-1, 136 g kg-1, respectively. Yields were higher in 100:20% mixtures, compared to 100:10% mixtures and single grown crops, and we conclude that intercropping these species is superior to cultivating them separately. Protein content wasn’t significantly different between two seeding rates, thus seed rates shouldn’t be lower than 100:20%.
PB  - Society of Field Crops Science
T2  - Turkish Journal of Field Crops
T1  - Forage yield and protein content of different field pea cultivars and oat mixtures grown as winter crops
EP  - 177
IS  - 2
SP  - 170
VL  - 24
DO  - 10.17557/tjfc.643524
ER  - 

@article{
author = "Krga, Ivan and Simić, A. and Mandić, Violeta and Bijelić, Z. and Dželetović, Ž.Ž. and Vasiljević, Sanja and Adžić, Slađan",
year = "2019",
abstract = "Monoculture and intensive use of mechanization and inorganic chemicals are leading to degradation and erosion of our soils and agro-ecosystems. At the same time, the production of animal feeds that are rich in protein is constantly decreasing in many European countries. Modest cultivation needs, favorable content of nutrients, and beneficial effect on the environment, make field pea and oat mixtures promising crops to tackle these issues. In three growing seasons and without irrigation or fertilisation, we have examined two basic field pea cultivars (Kosmaj, OS Adam) and one leafless cultivar (OS Letin) intercropped with oat (NS Jadar), with seeding rates, field pea: oat - 100:10%; 100:20%. Results have shown that basic type cultivars have better overall development and higher yields compared to leafless cultivar, whether grown as single crops or in the mixture. Basic cultivars (OS Adam, Kosmaj) achieved higher protein content, compared to cultivar Letin, 163.9 g kg-1, 153.3 g kg-1, 136 g kg-1, respectively. Yields were higher in 100:20% mixtures, compared to 100:10% mixtures and single grown crops, and we conclude that intercropping these species is superior to cultivating them separately. Protein content wasn’t significantly different between two seeding rates, thus seed rates shouldn’t be lower than 100:20%.",
publisher = "Society of Field Crops Science",
journal = "Turkish Journal of Field Crops",
title = "Forage yield and protein content of different field pea cultivars and oat mixtures grown as winter crops",
pages = "177-170",
number = "2",
volume = "24",
doi = "10.17557/tjfc.643524"
}

Krga, I., Simić, A., Mandić, V., Bijelić, Z., Dželetović, Ž.Ž., Vasiljević, S.,& Adžić, S.. (2019). Forage yield and protein content of different field pea cultivars and oat mixtures grown as winter crops. in Turkish Journal of Field Crops
Society of Field Crops Science., 24(2), 170-177.
https://doi.org/10.17557/tjfc.643524

Krga I, Simić A, Mandić V, Bijelić Z, Dželetović Ž, Vasiljević S, Adžić S. Forage yield and protein content of different field pea cultivars and oat mixtures grown as winter crops. in Turkish Journal of Field Crops. 2019;24(2):170-177.
doi:10.17557/tjfc.643524 .

Krga, Ivan, Simić, A., Mandić, Violeta, Bijelić, Z., Dželetović, Ž.Ž., Vasiljević, Sanja, Adžić, Slađan, "Forage yield and protein content of different field pea cultivars and oat mixtures grown as winter crops" in Turkish Journal of Field Crops, 24, no. 2 (2019):170-177,
https://doi.org/10.17557/tjfc.643524 . .