TY  - JOUR
AU  - Ponjičan, Ondrej
AU  - Bajkin, Andjelko
AU  - Radomirović, Dragi
AU  - Dimitrijević, Aleksandra
AU  - Dulić, Mario
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3957
AB  - In this paper carrot open field production was analyzed. Spring seeded carrot was used for root drying and summer seeded carrot was used for the fresh consumption. Average yields were 50 and 69 t/ha with the total energy input of 52.45 and 76.44 GJ/ha. Total energy consumption in drying was 373 GJ/ha. Carrot root for the fresh market was stored for six months, then washed and packed with the total energy input of 99 GJ/ha. In the structure of energy inputs for drying, the highest share had the natural gas consumption and electricity and these were 74.52 and 19.73 %. In the case of fresh market carrot processing, the highest share in total energy input of 74.57 % had the electricity. In order to minimize the energy input in the process of drying, carrot should be seeded in spring and the one that is for the fresh consumption, should be seeded in summer.
AB  - U ovom radu je analizirana njivska proizvodnja korena mrkve. Analizirana je proizvodnja iz prolećne setve namenjena za sušenje korena mrkve i proizvodnja iz letnje setve namenjena za upotrebu u svežem stanju, pri čemu su ostvareni prosečni prinosi od 50 i 69 t/ha, uz ukupni energetski input (Total energy input) od 52,45 i 76,44 GJ/ha. Ukupni energetski input za industrijsku preradu sušenjem, bio je 373 GJ/ha. Koren mrkve za svežu upotrebu se određeni period skladišti (prosečno 6 meseci), a zatim pere i pakuje uz ukupni energetski input od 99 GJ/ha. U strukturi ukupnog energetskog bilansa za sušenje korena mrkve, najveći udeo ima potrošnja zemnog gasa i električne energije, što iznosi 74,52 i 19,73%. Prilikom dorade korena mrkve za svežu upotrebu, u strukturi ukupnog energetskog bilansa, najveći udeo ima potrošnja električne energije prilikom skaldištenja, 74,57%. Da bi se ostvarila minimalna vrednost ukupnog energetskog inputa, mrkvu namenjenu za sušenje je potrebno proizvoditi iz prolećne setve, a mrkvu namjenjenu za svežu upotrebu iz letnje setve.
PB  - Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad
T2  - Journal on Processing and Energy in Agriculture
T1  - Energy balance of the carrot root processing
T1  - Energetski bilans dorade korena mrkve
EP  - 153
IS  - 3
SP  - 151
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3957
ER  - 

@article{
author = "Ponjičan, Ondrej and Bajkin, Andjelko and Radomirović, Dragi and Dimitrijević, Aleksandra and Dulić, Mario",
year = "2015",
abstract = "In this paper carrot open field production was analyzed. Spring seeded carrot was used for root drying and summer seeded carrot was used for the fresh consumption. Average yields were 50 and 69 t/ha with the total energy input of 52.45 and 76.44 GJ/ha. Total energy consumption in drying was 373 GJ/ha. Carrot root for the fresh market was stored for six months, then washed and packed with the total energy input of 99 GJ/ha. In the structure of energy inputs for drying, the highest share had the natural gas consumption and electricity and these were 74.52 and 19.73 %. In the case of fresh market carrot processing, the highest share in total energy input of 74.57 % had the electricity. In order to minimize the energy input in the process of drying, carrot should be seeded in spring and the one that is for the fresh consumption, should be seeded in summer., U ovom radu je analizirana njivska proizvodnja korena mrkve. Analizirana je proizvodnja iz prolećne setve namenjena za sušenje korena mrkve i proizvodnja iz letnje setve namenjena za upotrebu u svežem stanju, pri čemu su ostvareni prosečni prinosi od 50 i 69 t/ha, uz ukupni energetski input (Total energy input) od 52,45 i 76,44 GJ/ha. Ukupni energetski input za industrijsku preradu sušenjem, bio je 373 GJ/ha. Koren mrkve za svežu upotrebu se određeni period skladišti (prosečno 6 meseci), a zatim pere i pakuje uz ukupni energetski input od 99 GJ/ha. U strukturi ukupnog energetskog bilansa za sušenje korena mrkve, najveći udeo ima potrošnja zemnog gasa i električne energije, što iznosi 74,52 i 19,73%. Prilikom dorade korena mrkve za svežu upotrebu, u strukturi ukupnog energetskog bilansa, najveći udeo ima potrošnja električne energije prilikom skaldištenja, 74,57%. Da bi se ostvarila minimalna vrednost ukupnog energetskog inputa, mrkvu namenjenu za sušenje je potrebno proizvoditi iz prolećne setve, a mrkvu namjenjenu za svežu upotrebu iz letnje setve.",
publisher = "Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad",
journal = "Journal on Processing and Energy in Agriculture",
title = "Energy balance of the carrot root processing, Energetski bilans dorade korena mrkve",
pages = "153-151",
number = "3",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3957"
}

Ponjičan, O., Bajkin, A., Radomirović, D., Dimitrijević, A.,& Dulić, M.. (2015). Energy balance of the carrot root processing. in Journal on Processing and Energy in Agriculture
Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad., 19(3), 151-153.
https://hdl.handle.net/21.15107/rcub_agrospace_3957

Ponjičan O, Bajkin A, Radomirović D, Dimitrijević A, Dulić M. Energy balance of the carrot root processing. in Journal on Processing and Energy in Agriculture. 2015;19(3):151-153.
https://hdl.handle.net/21.15107/rcub_agrospace_3957 .

Ponjičan, Ondrej, Bajkin, Andjelko, Radomirović, Dragi, Dimitrijević, Aleksandra, Dulić, Mario, "Energy balance of the carrot root processing" in Journal on Processing and Energy in Agriculture, 19, no. 3 (2015):151-153,
https://hdl.handle.net/21.15107/rcub_agrospace_3957 .

TY  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Blažin, Slobodan
AU  - Blažin, Dragan
AU  - Ponjičan, Ondrej
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3956
AB  - In this paper the influence of tomato production technology and greenhouse construction type on production energy efficiency was analyzed. Influence of greenhouse construction on energy consumption was estimated for four different double plastic covered greenhouses: a tunnel type, covered with 180 µm PE UV IR outside folia, a gutter connected plastic covered greenhouse with 50 µm inner folia and 180 µm outside folia, a multi-span greenhouse with four bays with 50 µm inner folia and 180 µm outside folia and a multi-span greenhouse with thirteen bays were used. Specific energy input, energy output-input ratio and energy productivity were estimated. Results show that there are differences in the open field and greenhouse tomato production. The lowest energy input was measured for the open filed tomato production (18.02 MJ/m2) while in greenhouses in average was 24.13 MJ/m2. Concerning the greenhouses alone, the highest energy input was calculated in the case of tunnel structure, 26.87 MJ/m2. The lowest yield was observed in the open filed tomato production (1.89 kg/m2). The highest yield was achieved in the multi-span greenhouse with thirteen bays (6.08 kg/m2). Analysis showed that tomato production technology influences the energy efficiency and that the type of greenhouse construction has a significant influence on the energy efficiency of the greenhouse tomato production.
AB  - U radu je prikazan uticaj tehnologije gajenja paradajza (otvoreno polje ili objekti zaštićenog prostora) na energetsku efikasnost. U tu svrhu praćena je njegova proizvodnja na otvorenom polju i u četiri tipa objekta i to objektu tunel tipa dimenzija 5,5 x 24 m pokrivenog 180 µm PE folijom, zatim u blok objektu sa dva bloka dimenzija 21 x 250 m sa 50 µm unutrašnjom i 180 µm spoljašnjom PE folijom, u blok objektu sa četiri bloka, dimenzija 4 x 8 x 51 m sa 50 µm unutrašnjom i 180 µm spoljašnjom PE folijom i u blok objektu sa trinaest blokova dimenzija 13 x 12 x 67,5 m sa 50 µm unutrašnjom i 180 µm spoljašnjom PE folijom. Na osnovu energetskog ouput-a i energetskog input-a, specifična potrošnja energije, energetski odnos i energetska produktivnost su određene. Rezultati pokazuju da postoje razlike u potrošnji energije u proizvodnji na otvorenom polju i u objektima zaštićenog prostora. Najniža potrošnja energije zabeležena je na otvorenom polju (18,02 MJ/m2) dok je potrošnja energije u objektima zaštićenog prostora u proseku bila 24,13 MJ/m2. Ako se međusobno uporede samo objekti zaštićenog prostora, najviše energije je utrošeno u objektu tunel tipa 26,87 MJ/m2. Najniži prinos je ostvaren na otvorenom polju i iznosio je 1,89 kg/m2 dok je najviši prinos zabeležen u blok objektu sa trinaest blokova (6,08 kg/m2). Analiza potrošnje energije je pokazala da tehnologija gajenja paradajza utiče na energetsku efikasnost proizvodnje kao i da se izborom tipa objekta značajno može uticati na energetsku produktivnost proizvodnje.
PB  - Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad
T2  - Journal on Processing and Energy in Agriculture
T1  - Energy efficiency of the tomato open filed and greenhouse production system
T1  - Energetska efikasnost proizvodnje paradajza na otvorenom polju i u objektima zaštićenog prostora
EP  - 135
IS  - 3
SP  - 132
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3956
ER  - 

@article{
author = "Dimitrijević, Aleksandra and Blažin, Slobodan and Blažin, Dragan and Ponjičan, Ondrej",
year = "2015",
abstract = "In this paper the influence of tomato production technology and greenhouse construction type on production energy efficiency was analyzed. Influence of greenhouse construction on energy consumption was estimated for four different double plastic covered greenhouses: a tunnel type, covered with 180 µm PE UV IR outside folia, a gutter connected plastic covered greenhouse with 50 µm inner folia and 180 µm outside folia, a multi-span greenhouse with four bays with 50 µm inner folia and 180 µm outside folia and a multi-span greenhouse with thirteen bays were used. Specific energy input, energy output-input ratio and energy productivity were estimated. Results show that there are differences in the open field and greenhouse tomato production. The lowest energy input was measured for the open filed tomato production (18.02 MJ/m2) while in greenhouses in average was 24.13 MJ/m2. Concerning the greenhouses alone, the highest energy input was calculated in the case of tunnel structure, 26.87 MJ/m2. The lowest yield was observed in the open filed tomato production (1.89 kg/m2). The highest yield was achieved in the multi-span greenhouse with thirteen bays (6.08 kg/m2). Analysis showed that tomato production technology influences the energy efficiency and that the type of greenhouse construction has a significant influence on the energy efficiency of the greenhouse tomato production., U radu je prikazan uticaj tehnologije gajenja paradajza (otvoreno polje ili objekti zaštićenog prostora) na energetsku efikasnost. U tu svrhu praćena je njegova proizvodnja na otvorenom polju i u četiri tipa objekta i to objektu tunel tipa dimenzija 5,5 x 24 m pokrivenog 180 µm PE folijom, zatim u blok objektu sa dva bloka dimenzija 21 x 250 m sa 50 µm unutrašnjom i 180 µm spoljašnjom PE folijom, u blok objektu sa četiri bloka, dimenzija 4 x 8 x 51 m sa 50 µm unutrašnjom i 180 µm spoljašnjom PE folijom i u blok objektu sa trinaest blokova dimenzija 13 x 12 x 67,5 m sa 50 µm unutrašnjom i 180 µm spoljašnjom PE folijom. Na osnovu energetskog ouput-a i energetskog input-a, specifična potrošnja energije, energetski odnos i energetska produktivnost su određene. Rezultati pokazuju da postoje razlike u potrošnji energije u proizvodnji na otvorenom polju i u objektima zaštićenog prostora. Najniža potrošnja energije zabeležena je na otvorenom polju (18,02 MJ/m2) dok je potrošnja energije u objektima zaštićenog prostora u proseku bila 24,13 MJ/m2. Ako se međusobno uporede samo objekti zaštićenog prostora, najviše energije je utrošeno u objektu tunel tipa 26,87 MJ/m2. Najniži prinos je ostvaren na otvorenom polju i iznosio je 1,89 kg/m2 dok je najviši prinos zabeležen u blok objektu sa trinaest blokova (6,08 kg/m2). Analiza potrošnje energije je pokazala da tehnologija gajenja paradajza utiče na energetsku efikasnost proizvodnje kao i da se izborom tipa objekta značajno može uticati na energetsku produktivnost proizvodnje.",
publisher = "Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad",
journal = "Journal on Processing and Energy in Agriculture",
title = "Energy efficiency of the tomato open filed and greenhouse production system, Energetska efikasnost proizvodnje paradajza na otvorenom polju i u objektima zaštićenog prostora",
pages = "135-132",
number = "3",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3956"
}

Dimitrijević, A., Blažin, S., Blažin, D.,& Ponjičan, O.. (2015). Energy efficiency of the tomato open filed and greenhouse production system. in Journal on Processing and Energy in Agriculture
Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad., 19(3), 132-135.
https://hdl.handle.net/21.15107/rcub_agrospace_3956

Dimitrijević A, Blažin S, Blažin D, Ponjičan O. Energy efficiency of the tomato open filed and greenhouse production system. in Journal on Processing and Energy in Agriculture. 2015;19(3):132-135.
https://hdl.handle.net/21.15107/rcub_agrospace_3956 .

Dimitrijević, Aleksandra, Blažin, Slobodan, Blažin, Dragan, Ponjičan, Ondrej, "Energy efficiency of the tomato open filed and greenhouse production system" in Journal on Processing and Energy in Agriculture, 19, no. 3 (2015):132-135,
https://hdl.handle.net/21.15107/rcub_agrospace_3956 .

TY  - JOUR
AU  - Ponjičan, Ondrej
AU  - Bajkin, Andjelko
AU  - Dimitrijević, Aleksandra
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3877
AB  - Sweet pepper from seedling produced at mulched area was testing during the course of production in 2013 in Novi Becej. The tested plot area was 1.88 ha. The study included the following technological operations: soil cultivation, container seedling production, soil mulching with tape drip irrigation and fertilization, planting of container seedlings, pepper care, picking peppers and cleaning plots by the end of the growing season. During the test for all of these technological operations was determined productivity and consumption of labor and machine work. In investigated pepper production technology was engaged 1017.67 h/ha and 3215.58 kWh/ha of of human and machine labor. The biggest engagement of human labor was in the pepper harvest, and amounts to 474.7 h/ha. The biggest engagement of machine work is ongoing pepper care precisely in drip irrigation, and amounts to 1407.3 kWh/ha.
AB  - Ispitivanje tehnologije proizvodnje povrtarske paprike iz rasada na malčovanom zemljištu izvedeno je u toku proizvodne 2013. godine u Novom Bečeju. Ispitivana parcela bila je površine 1,88 ha. Ispitivanjem su obuhvaćene sledeće tehnološke operacije: obrada zemljišta, kontejnerska proizvodnja rasada, mehanizovano nastiranje zemljišta sa postavljanjem trake za navodnjavanje kapanjem i đubrenjem, sadnja kontejnerskog rasada paprike, nega paprike, berba paprike i čišćenje parcele po završetku vegetacije. U toku ispitivanja za sve navedene tehnološke operacije određena je proizvodnost i utrošak živog i mašinskog rada. Pri tehnologiji proizvodnje povrtarske paprike na malčovanom zemljištu ukupno je angažovano 1017,67 radnik h/ha živog rada i 3215,58 kWh/ha mašinskog rada. Najveće angažovanje živog rada je u berbi paprike i iznosi 474,7 radnik h/ha. Najveće angažovanje mašinskog rada je u toku nege paprike preciznije prilikom navodnjavanja kapanjem, i iznosi 1407,3 kWh/ha.
PB  - Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad
T2  - Savremena poljoprivredna tehnika
T1  - Tecnical and technological parameters sweet pepers production
T1  - Tehničko tehnološki parametri proizvodnje povrtarske paprike
EP  - 140
IS  - 3
SP  - 131
VL  - 41
DO  - 10.5937/SavPoljTeh1503131P
ER  - 

@article{
author = "Ponjičan, Ondrej and Bajkin, Andjelko and Dimitrijević, Aleksandra",
year = "2015",
abstract = "Sweet pepper from seedling produced at mulched area was testing during the course of production in 2013 in Novi Becej. The tested plot area was 1.88 ha. The study included the following technological operations: soil cultivation, container seedling production, soil mulching with tape drip irrigation and fertilization, planting of container seedlings, pepper care, picking peppers and cleaning plots by the end of the growing season. During the test for all of these technological operations was determined productivity and consumption of labor and machine work. In investigated pepper production technology was engaged 1017.67 h/ha and 3215.58 kWh/ha of of human and machine labor. The biggest engagement of human labor was in the pepper harvest, and amounts to 474.7 h/ha. The biggest engagement of machine work is ongoing pepper care precisely in drip irrigation, and amounts to 1407.3 kWh/ha., Ispitivanje tehnologije proizvodnje povrtarske paprike iz rasada na malčovanom zemljištu izvedeno je u toku proizvodne 2013. godine u Novom Bečeju. Ispitivana parcela bila je površine 1,88 ha. Ispitivanjem su obuhvaćene sledeće tehnološke operacije: obrada zemljišta, kontejnerska proizvodnja rasada, mehanizovano nastiranje zemljišta sa postavljanjem trake za navodnjavanje kapanjem i đubrenjem, sadnja kontejnerskog rasada paprike, nega paprike, berba paprike i čišćenje parcele po završetku vegetacije. U toku ispitivanja za sve navedene tehnološke operacije određena je proizvodnost i utrošak živog i mašinskog rada. Pri tehnologiji proizvodnje povrtarske paprike na malčovanom zemljištu ukupno je angažovano 1017,67 radnik h/ha živog rada i 3215,58 kWh/ha mašinskog rada. Najveće angažovanje živog rada je u berbi paprike i iznosi 474,7 radnik h/ha. Najveće angažovanje mašinskog rada je u toku nege paprike preciznije prilikom navodnjavanja kapanjem, i iznosi 1407,3 kWh/ha.",
publisher = "Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad",
journal = "Savremena poljoprivredna tehnika",
title = "Tecnical and technological parameters sweet pepers production, Tehničko tehnološki parametri proizvodnje povrtarske paprike",
pages = "140-131",
number = "3",
volume = "41",
doi = "10.5937/SavPoljTeh1503131P"
}

Ponjičan, O., Bajkin, A.,& Dimitrijević, A.. (2015). Tecnical and technological parameters sweet pepers production. in Savremena poljoprivredna tehnika
Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad., 41(3), 131-140.
https://doi.org/10.5937/SavPoljTeh1503131P

Ponjičan O, Bajkin A, Dimitrijević A. Tecnical and technological parameters sweet pepers production. in Savremena poljoprivredna tehnika. 2015;41(3):131-140.
doi:10.5937/SavPoljTeh1503131P .

Ponjičan, Ondrej, Bajkin, Andjelko, Dimitrijević, Aleksandra, "Tecnical and technological parameters sweet pepers production" in Savremena poljoprivredna tehnika, 41, no. 3 (2015):131-140,
https://doi.org/10.5937/SavPoljTeh1503131P . .

TY  - CONF
AU  - Dimitrijević, Aleksandra
AU  - Statuto, Dina
AU  - Sica, Carmela
AU  - Ponjičan, Ondrej
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3724
AB  - Greenhouse production system is a system that needs a good management. If on the beginning things are not clear to the producer the greenhouse system will not work properly and it would be economically and energetically unstable. Before starting the greenhouse business the farmer must have an idea what he wants, what is he capable of and what are his resources. In this paper, an improvement of a simple model as decision support model for the greenhouse production system is presented. The basic idea of the algorithm was to offer to the producer an adequate solution of the greenhouse production systems regarding the greenhouse construction type and technical systems with their capacities, based on his elementary idea. In sense of user friendly working environment, spatial analysis (GIS) was introduced as a possibility of serving as an input data tool for the model. Based on the farmer / producer location algorithm itself draws the data from the various orographic characteristics such as slope of the terrain, exposition, soil type, soil quality, underground waters and weather conditions for the specific location and thus provides to the farmer / producer necessary input data in the short period of time.
PB  - Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb
C3  - Aktualni Zadaci Mehanizacije Poljoprivrede: Actual Tasks on Agricultural Engineering
T1  - Possibilities of using spatial analysis (gis) as an input data tool for the greenhouse decision support model
EP  - 459
SP  - 451
VL  - 43
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3724
ER  - 

@conference{
author = "Dimitrijević, Aleksandra and Statuto, Dina and Sica, Carmela and Ponjičan, Ondrej",
year = "2015",
abstract = "Greenhouse production system is a system that needs a good management. If on the beginning things are not clear to the producer the greenhouse system will not work properly and it would be economically and energetically unstable. Before starting the greenhouse business the farmer must have an idea what he wants, what is he capable of and what are his resources. In this paper, an improvement of a simple model as decision support model for the greenhouse production system is presented. The basic idea of the algorithm was to offer to the producer an adequate solution of the greenhouse production systems regarding the greenhouse construction type and technical systems with their capacities, based on his elementary idea. In sense of user friendly working environment, spatial analysis (GIS) was introduced as a possibility of serving as an input data tool for the model. Based on the farmer / producer location algorithm itself draws the data from the various orographic characteristics such as slope of the terrain, exposition, soil type, soil quality, underground waters and weather conditions for the specific location and thus provides to the farmer / producer necessary input data in the short period of time.",
publisher = "Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb",
journal = "Aktualni Zadaci Mehanizacije Poljoprivrede: Actual Tasks on Agricultural Engineering",
title = "Possibilities of using spatial analysis (gis) as an input data tool for the greenhouse decision support model",
pages = "459-451",
volume = "43",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3724"
}

Dimitrijević, A., Statuto, D., Sica, C.,& Ponjičan, O.. (2015). Possibilities of using spatial analysis (gis) as an input data tool for the greenhouse decision support model. in Aktualni Zadaci Mehanizacije Poljoprivrede: Actual Tasks on Agricultural Engineering
Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb., 43, 451-459.
https://hdl.handle.net/21.15107/rcub_agrospace_3724

Dimitrijević A, Statuto D, Sica C, Ponjičan O. Possibilities of using spatial analysis (gis) as an input data tool for the greenhouse decision support model. in Aktualni Zadaci Mehanizacije Poljoprivrede: Actual Tasks on Agricultural Engineering. 2015;43:451-459.
https://hdl.handle.net/21.15107/rcub_agrospace_3724 .

Dimitrijević, Aleksandra, Statuto, Dina, Sica, Carmela, Ponjičan, Ondrej, "Possibilities of using spatial analysis (gis) as an input data tool for the greenhouse decision support model" in Aktualni Zadaci Mehanizacije Poljoprivrede: Actual Tasks on Agricultural Engineering, 43 (2015):451-459,
https://hdl.handle.net/21.15107/rcub_agrospace_3724 .

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  - Bajkin, Andjelko
AU  - Ponjičan, Ondrej
AU  - Dimitrijević, Aleksandra
AU  - Zoranović, Miodrag
AU  - Radojčin, Milivoj
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3360
AB  - Influence the direction rotor rotary tiller on the ecological aspects of soil tillage was investigated under field conditions. Quality of soil tillage was determined by measuring the bulk density and the structure coefficient. Bulk density the tilled soil ranged from 1.015 to 1.186 g/cm3 at stubble field, 0.990 to 1.151 g/cm3 at soybean field and 0.995 to 1.066 g/cm3 at ploughed field. For conventional rotor rotation direction measured significantly lower values of bulk density at 5-10 cm depth testing done on soybean field. The lower value of bulk density in conventional rotor rotation direction result of excessive fragmentation of soil in greater depth. Soil tillage was a statistically significant increase in the value of the structure coefficient. After soil tillage, the structure coefficient values ranged from 0.68 to 2.22 at stubble field, 0.78 to 1.84 at soybean field and 1.16 to 2.64 at ploughed field. The higher the value of the structure coefficient represents higher quality of soil cultivation. In the case of reverse rotor rotation direction, measured significantly higher structure coefficient values compared to conventional rotor rotation direction.
AB  - Uticaj smera obrtanja rotora rotacione sitnilice na ekološke aspekte obrade zemljišta ispitivan je u poljskim uslovima. Kvalitet obrade zemljišta određen je merenjem zapreminske mase i koeficijenta strukturnosti zemljišta. Zapreminska masa na obrađenom zemljištu kretala se u granicama 1,015-1,186 g/cm3 na strništu, 0,990-1,151 g/cm3 na sojištu i 0,995-1,066 g/cm3 na oranom zemljištu. Za istosmerno obrtanje rotora izmerene su statistički značajno niže vrednosti zapreminske mase na dubini 5-10 cm za ispitivanje izvedeno na sojištu. Niža vrednost zapreminske mase zemljišta pri istosmernom obrtanju posledica je prekomernog usitnjavanja zemljišta na većoj dubini. Obradom zemljišta došlo je do statistički značajnog povećanja vrednosti koeficijenta strukturnosti zemljišta. Nakon obrade zemljišta vrednosti koeficijenta strukturnosti kretale su se u granicama 0,68-2,22 na strništu, 0,78-1,84 na sojištu i 1,16-2,64 na oranom zemljištu. Viša vrednost koeficijenta strukturnosti predstavlja viši kvalitet obrade zemljišta. Pri suprotnosmernom obrtanju rotora, izmerene su statistički značajno više vrednosti koeficijenta strukturnosti u odnosu na istosmerno obrtanje rotora.
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  - Influence the rotary tiller rotor rotation direction on soil tillage ecological aspects
T1  - Uticaja smera obrtanja rotora rotacione sitnilice na ekološke aspekte obrade zemljišta
EP  - 15
IS  - 4
SP  - 7
VL  - 18
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3360
ER  - 

@article{
author = "Bajkin, Andjelko and Ponjičan, Ondrej and Dimitrijević, Aleksandra and Zoranović, Miodrag and Radojčin, Milivoj",
year = "2013",
abstract = "Influence the direction rotor rotary tiller on the ecological aspects of soil tillage was investigated under field conditions. Quality of soil tillage was determined by measuring the bulk density and the structure coefficient. Bulk density the tilled soil ranged from 1.015 to 1.186 g/cm3 at stubble field, 0.990 to 1.151 g/cm3 at soybean field and 0.995 to 1.066 g/cm3 at ploughed field. For conventional rotor rotation direction measured significantly lower values of bulk density at 5-10 cm depth testing done on soybean field. The lower value of bulk density in conventional rotor rotation direction result of excessive fragmentation of soil in greater depth. Soil tillage was a statistically significant increase in the value of the structure coefficient. After soil tillage, the structure coefficient values ranged from 0.68 to 2.22 at stubble field, 0.78 to 1.84 at soybean field and 1.16 to 2.64 at ploughed field. The higher the value of the structure coefficient represents higher quality of soil cultivation. In the case of reverse rotor rotation direction, measured significantly higher structure coefficient values compared to conventional rotor rotation direction., Uticaj smera obrtanja rotora rotacione sitnilice na ekološke aspekte obrade zemljišta ispitivan je u poljskim uslovima. Kvalitet obrade zemljišta određen je merenjem zapreminske mase i koeficijenta strukturnosti zemljišta. Zapreminska masa na obrađenom zemljištu kretala se u granicama 1,015-1,186 g/cm3 na strništu, 0,990-1,151 g/cm3 na sojištu i 0,995-1,066 g/cm3 na oranom zemljištu. Za istosmerno obrtanje rotora izmerene su statistički značajno niže vrednosti zapreminske mase na dubini 5-10 cm za ispitivanje izvedeno na sojištu. Niža vrednost zapreminske mase zemljišta pri istosmernom obrtanju posledica je prekomernog usitnjavanja zemljišta na većoj dubini. Obradom zemljišta došlo je do statistički značajnog povećanja vrednosti koeficijenta strukturnosti zemljišta. Nakon obrade zemljišta vrednosti koeficijenta strukturnosti kretale su se u granicama 0,68-2,22 na strništu, 0,78-1,84 na sojištu i 1,16-2,64 na oranom zemljištu. Viša vrednost koeficijenta strukturnosti predstavlja viši kvalitet obrade zemljišta. Pri suprotnosmernom obrtanju rotora, izmerene su statistički značajno više vrednosti koeficijenta strukturnosti u odnosu na istosmerno obrtanje rotora.",
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 = "Influence the rotary tiller rotor rotation direction on soil tillage ecological aspects, Uticaja smera obrtanja rotora rotacione sitnilice na ekološke aspekte obrade zemljišta",
pages = "15-7",
number = "4",
volume = "18",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3360"
}

Bajkin, A., Ponjičan, O., Dimitrijević, A., Zoranović, M.,& Radojčin, M.. (2013). Influence the rotary tiller rotor rotation direction on soil tillage ecological aspects. 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(4), 7-15.
https://hdl.handle.net/21.15107/rcub_agrospace_3360

Bajkin A, Ponjičan O, Dimitrijević A, Zoranović M, Radojčin M. Influence the rotary tiller rotor rotation direction on soil tillage ecological aspects. in Traktori i pogonske mašine. 2013;18(4):7-15.
https://hdl.handle.net/21.15107/rcub_agrospace_3360 .

Bajkin, Andjelko, Ponjičan, Ondrej, Dimitrijević, Aleksandra, Zoranović, Miodrag, Radojčin, Milivoj, "Influence the rotary tiller rotor rotation direction on soil tillage ecological aspects" in Traktori i pogonske mašine, 18, no. 4 (2013):7-15,
https://hdl.handle.net/21.15107/rcub_agrospace_3360 .

TY  - JOUR
AU  - Bajkin, Andjelko
AU  - Ilin, Žarko
AU  - Ponjičan, Ondrej
AU  - Dimitrijević, Aleksandra
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3353
AB  - In the last 40 years, the average acreage under vegetables in Serbia was 297,231 ha, which accounted for about 9% of the total arable land. The minimum vegetable acreage, 260,000 ha, was recorded in 1970, the maximum, 341 000 ha, in 1996. In the same period of 40 years, the average production of vegetables and potatoes in Serbia was about 2.1 million tons, at the average acreage of about 248,000 hectares, whose value totaled about 435 million euros. Of the previous figures, the production of fresh vegetables (beans, peas, onions, cabbage, kale, peppers, tomatoes, melons, carrots, cucumbers, spice pepper and garlic) was about 1.23 million tons at the acreage of 157,630 ha and 852,394 t of potatoes at the acreage of 90,802 ha. It is estimated that in the vegetable production in home gardens (at 48,799 ha) turns out about 409,240 t of vegetables whose overall value is about 85.5 million euros. There are no precise data on the vegetable production in tunnel-type greenhouses. It is roughly estimated that vegetables are grown at the acreage of 5000-6000 ha, with a steady increase of the acreage and the value of production at around 655 million euros. .
AB  - Prosečne površine pod povrćem u poslednjih 40 godina u Srbiji bile 297.231 ha, što čini oko 9% od ukupno obradivih površina. Minimalna površina pod povrćem, od 260.000 ha, zabeležena je 1970., a maksimalna (341.000 ha) 1996. godine. U Srbiji se u proseku za poslednjih 40 godina proizvodilo oko 2,1 miliona tona povrća i krompira u vrednosti od oko 435 miliona evra, na površini od oko 248 hiljada hektara. Od toga sveže povrće je oko 1,23 miliona tona (pasulj, grašak, crni luk, kupus i kelj, paprika, paradajz, bostan, mrkva, krastavac, začinska paprika i beli luk) sa površine od 157.630 ha i 852.394 t krompira sa površine od 90.802 ha. Procena je da se u baštama (48.799 ha) proizvede oko 409.240 t povrća ukupne vrednost od oko 85,5 miliona evra. Preciznih podataka o površinama pod plastenicima tunelskog tipa kod nas nema. Procena je da se u plastenicima povrće gaji na površini od 5.000-6.000 ha, sa stalnom tendencijom rasta. Proizvede se oko 840.000 t povrća u vrednosti proizvodnje na nivou od oko 655 miliona evra. .
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  - Mechanization for vegetable production: Situation and needs
T1  - Mehanizacija u povrtarstvu - stanje i potrebe
EP  - 47
IS  - 1
SP  - 37
VL  - 18
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3353
ER  - 

@article{
author = "Bajkin, Andjelko and Ilin, Žarko and Ponjičan, Ondrej and Dimitrijević, Aleksandra",
year = "2013",
abstract = "In the last 40 years, the average acreage under vegetables in Serbia was 297,231 ha, which accounted for about 9% of the total arable land. The minimum vegetable acreage, 260,000 ha, was recorded in 1970, the maximum, 341 000 ha, in 1996. In the same period of 40 years, the average production of vegetables and potatoes in Serbia was about 2.1 million tons, at the average acreage of about 248,000 hectares, whose value totaled about 435 million euros. Of the previous figures, the production of fresh vegetables (beans, peas, onions, cabbage, kale, peppers, tomatoes, melons, carrots, cucumbers, spice pepper and garlic) was about 1.23 million tons at the acreage of 157,630 ha and 852,394 t of potatoes at the acreage of 90,802 ha. It is estimated that in the vegetable production in home gardens (at 48,799 ha) turns out about 409,240 t of vegetables whose overall value is about 85.5 million euros. There are no precise data on the vegetable production in tunnel-type greenhouses. It is roughly estimated that vegetables are grown at the acreage of 5000-6000 ha, with a steady increase of the acreage and the value of production at around 655 million euros. ., Prosečne površine pod povrćem u poslednjih 40 godina u Srbiji bile 297.231 ha, što čini oko 9% od ukupno obradivih površina. Minimalna površina pod povrćem, od 260.000 ha, zabeležena je 1970., a maksimalna (341.000 ha) 1996. godine. U Srbiji se u proseku za poslednjih 40 godina proizvodilo oko 2,1 miliona tona povrća i krompira u vrednosti od oko 435 miliona evra, na površini od oko 248 hiljada hektara. Od toga sveže povrće je oko 1,23 miliona tona (pasulj, grašak, crni luk, kupus i kelj, paprika, paradajz, bostan, mrkva, krastavac, začinska paprika i beli luk) sa površine od 157.630 ha i 852.394 t krompira sa površine od 90.802 ha. Procena je da se u baštama (48.799 ha) proizvede oko 409.240 t povrća ukupne vrednost od oko 85,5 miliona evra. Preciznih podataka o površinama pod plastenicima tunelskog tipa kod nas nema. Procena je da se u plastenicima povrće gaji na površini od 5.000-6.000 ha, sa stalnom tendencijom rasta. Proizvede se oko 840.000 t povrća u vrednosti proizvodnje na nivou od oko 655 miliona evra. .",
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 = "Mechanization for vegetable production: Situation and needs, Mehanizacija u povrtarstvu - stanje i potrebe",
pages = "47-37",
number = "1",
volume = "18",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3353"
}

Bajkin, A., Ilin, Ž., Ponjičan, O.,& Dimitrijević, A.. (2013). Mechanization for vegetable production: Situation 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), 37-47.
https://hdl.handle.net/21.15107/rcub_agrospace_3353

Bajkin A, Ilin Ž, Ponjičan O, Dimitrijević A. Mechanization for vegetable production: Situation and needs. in Traktori i pogonske mašine. 2013;18(1):37-47.
https://hdl.handle.net/21.15107/rcub_agrospace_3353 .

Bajkin, Andjelko, Ilin, Žarko, Ponjičan, Ondrej, Dimitrijević, Aleksandra, "Mechanization for vegetable production: Situation and needs" in Traktori i pogonske mašine, 18, no. 1 (2013):37-47,
https://hdl.handle.net/21.15107/rcub_agrospace_3353 .

TY  - CONF
AU  - Dimitrijević, Aleksandra
AU  - Miodragović, Rajko
AU  - Mileusnić, Zoran
AU  - Urošević, Mirko
AU  - Ponjičan, Ondrej
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3009
AB  - In this paper an introduction to a model that can serve for optimal choice of the greenhouse technical and technology system is presented. The model is very suitable for producers to whom adequate solution of the greenhouse production systems can be suggested, based on their elementary idea, regarding the greenhouse construction type and technical systems with their capacities. Based the chosen plant production and available production area the model suggests to the farmer which type of greenhouse to use, which technical systems together with their capacity and suggests the area for further expansion.
PB  - Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb
C3  - Aktualni Zadaci Mehanizacije Poljoprivrede
T1  - Introduction to the greenhouse decision support model
EP  - 576
SP  - 569
VL  - 40
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3009
ER  - 

@conference{
author = "Dimitrijević, Aleksandra and Miodragović, Rajko and Mileusnić, Zoran and Urošević, Mirko and Ponjičan, Ondrej",
year = "2012",
abstract = "In this paper an introduction to a model that can serve for optimal choice of the greenhouse technical and technology system is presented. The model is very suitable for producers to whom adequate solution of the greenhouse production systems can be suggested, based on their elementary idea, regarding the greenhouse construction type and technical systems with their capacities. Based the chosen plant production and available production area the model suggests to the farmer which type of greenhouse to use, which technical systems together with their capacity and suggests the area for further expansion.",
publisher = "Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb",
journal = "Aktualni Zadaci Mehanizacije Poljoprivrede",
title = "Introduction to the greenhouse decision support model",
pages = "576-569",
volume = "40",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3009"
}

Dimitrijević, A., Miodragović, R., Mileusnić, Z., Urošević, M.,& Ponjičan, O.. (2012). Introduction to the greenhouse decision support model. in Aktualni Zadaci Mehanizacije Poljoprivrede
Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb., 40, 569-576.
https://hdl.handle.net/21.15107/rcub_agrospace_3009

Dimitrijević A, Miodragović R, Mileusnić Z, Urošević M, Ponjičan O. Introduction to the greenhouse decision support model. in Aktualni Zadaci Mehanizacije Poljoprivrede. 2012;40:569-576.
https://hdl.handle.net/21.15107/rcub_agrospace_3009 .

Dimitrijević, Aleksandra, Miodragović, Rajko, Mileusnić, Zoran, Urošević, Mirko, Ponjičan, Ondrej, "Introduction to the greenhouse decision support model" in Aktualni Zadaci Mehanizacije Poljoprivrede, 40 (2012):569-576,
https://hdl.handle.net/21.15107/rcub_agrospace_3009 .

TY  - CONF
AU  - Ponjičan, Ondrej
AU  - Bajkin, Andjelko
AU  - Dimitrijević, Aleksandra
AU  - Mileusnić, Zoran
AU  - Miodragović, Rajko
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2636
AB  - The aim of this research was to investigate the temperature distribution 10 cm above the soil in different conditions of lettuce production system (open filed, mulching, low tunnels, greenhouses). Based on the results, average daily temperatures were calculated. Special attention was given to the morning and temperatures in the afternoon. Results show that there is a significant increase in lettuce yield in the early production phase, for the plants that were covered with agro-textile and PE folia.
PB  - Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb
C3  - Aktualni Zadaci Mehanizacije Poljoprivrede
T1  - The influence of soil mulching and greenhouse covering material on the temperature distribution in lettuce production
EP  - +
SP  - 393
VL  - 39
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2636
ER  - 

@conference{
author = "Ponjičan, Ondrej and Bajkin, Andjelko and Dimitrijević, Aleksandra and Mileusnić, Zoran and Miodragović, Rajko",
year = "2011",
abstract = "The aim of this research was to investigate the temperature distribution 10 cm above the soil in different conditions of lettuce production system (open filed, mulching, low tunnels, greenhouses). Based on the results, average daily temperatures were calculated. Special attention was given to the morning and temperatures in the afternoon. Results show that there is a significant increase in lettuce yield in the early production phase, for the plants that were covered with agro-textile and PE folia.",
publisher = "Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb",
journal = "Aktualni Zadaci Mehanizacije Poljoprivrede",
title = "The influence of soil mulching and greenhouse covering material on the temperature distribution in lettuce production",
pages = "+-393",
volume = "39",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2636"
}

Ponjičan, O., Bajkin, A., Dimitrijević, A., Mileusnić, Z.,& Miodragović, R.. (2011). The influence of soil mulching and greenhouse covering material on the temperature distribution in lettuce production. in Aktualni Zadaci Mehanizacije Poljoprivrede
Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb., 39, 393-+.
https://hdl.handle.net/21.15107/rcub_agrospace_2636

Ponjičan O, Bajkin A, Dimitrijević A, Mileusnić Z, Miodragović R. The influence of soil mulching and greenhouse covering material on the temperature distribution in lettuce production. in Aktualni Zadaci Mehanizacije Poljoprivrede. 2011;39:393-+.
https://hdl.handle.net/21.15107/rcub_agrospace_2636 .

Ponjičan, Ondrej, Bajkin, Andjelko, Dimitrijević, Aleksandra, Mileusnić, Zoran, Miodragović, Rajko, "The influence of soil mulching and greenhouse covering material on the temperature distribution in lettuce production" in Aktualni Zadaci Mehanizacije Poljoprivrede, 39 (2011):393-+,
https://hdl.handle.net/21.15107/rcub_agrospace_2636 .

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 . .

TY  - CONF
AU  - Dimitrijević, Aleksandra
AU  - Dević, Milan
AU  - Bajkin, Andjelko
AU  - Ponjičan, Ondrej
AU  - Barać, Saša
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2609
AB  - In this paper the influence of greenhouse construction on energy efficiency in winter lettuce production was estimated fir different double plastic covered greenhouses in Serbia region. In order to see whether the greenhouse structure influences energy consumption, energy inputs were estimated for lettuce production in four different greenhouse structures (a tunnel and gutter connected structure and three multi-span greenhouses). On the basis of lettuce production output and the energy input specific energy input, energy output-input ratio and energy productivity were estimated. Results show that the lowest energy consumption was obtained for gutter connected greenhouse with two bays, 3.11 MJ/m(2). The highest energy consumption was multi-span greenhouse with thirteen bays, 3.30 MJ/m(2). The highest value for output-input ratio was calculated for the multi-span greenhouse with thirteen bap, 0.85 and the lowest for the tunnel structure, 0.47. Regression equations show the nature of the greenhouse structure influence on these parameters.
PB  - Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb
C3  - Aktualni Zadaci Mehanizacije Poljoprivrede
T1  - Energy efficiency of the lettuce greenhouse production
EP  - +
SP  - 463
VL  - 39
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2609
ER  - 

@conference{
author = "Dimitrijević, Aleksandra and Dević, Milan and Bajkin, Andjelko and Ponjičan, Ondrej and Barać, Saša",
year = "2011",
abstract = "In this paper the influence of greenhouse construction on energy efficiency in winter lettuce production was estimated fir different double plastic covered greenhouses in Serbia region. In order to see whether the greenhouse structure influences energy consumption, energy inputs were estimated for lettuce production in four different greenhouse structures (a tunnel and gutter connected structure and three multi-span greenhouses). On the basis of lettuce production output and the energy input specific energy input, energy output-input ratio and energy productivity were estimated. Results show that the lowest energy consumption was obtained for gutter connected greenhouse with two bays, 3.11 MJ/m(2). The highest energy consumption was multi-span greenhouse with thirteen bays, 3.30 MJ/m(2). The highest value for output-input ratio was calculated for the multi-span greenhouse with thirteen bap, 0.85 and the lowest for the tunnel structure, 0.47. Regression equations show the nature of the greenhouse structure influence on these parameters.",
publisher = "Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb",
journal = "Aktualni Zadaci Mehanizacije Poljoprivrede",
title = "Energy efficiency of the lettuce greenhouse production",
pages = "+-463",
volume = "39",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2609"
}

Dimitrijević, A., Dević, M., Bajkin, A., Ponjičan, O.,& Barać, S.. (2011). Energy efficiency of the lettuce greenhouse production. in Aktualni Zadaci Mehanizacije Poljoprivrede
Agronomski fakultet Sveucilista u Zagrebu, 10000 Zagreb., 39, 463-+.
https://hdl.handle.net/21.15107/rcub_agrospace_2609

Dimitrijević A, Dević M, Bajkin A, Ponjičan O, Barać S. Energy efficiency of the lettuce greenhouse production. in Aktualni Zadaci Mehanizacije Poljoprivrede. 2011;39:463-+.
https://hdl.handle.net/21.15107/rcub_agrospace_2609 .

Dimitrijević, Aleksandra, Dević, Milan, Bajkin, Andjelko, Ponjičan, Ondrej, Barać, Saša, "Energy efficiency of the lettuce greenhouse production" in Aktualni Zadaci Mehanizacije Poljoprivrede, 39 (2011):463-+,
https://hdl.handle.net/21.15107/rcub_agrospace_2609 .

TY  - JOUR
AU  - Zoranović, Miodrag
AU  - Dimitrijević, Aleksandra
AU  - Bajkin, Andjelko
AU  - Ponjičan, Ondrej
AU  - Ivanišević, Mladen
AU  - Potkonjak, Vlado
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2200
AB  - In order to save and rationally use energy, the usage of heat pumps is getting ever more attention. Producers and distributors of heat pump systems have accumulated certain experience when it comes to using them for individual house heat supply, mainly in the form of floor heating. However, it is possible to use the heat energy obtained by a heat pump for different processes within agricultural production, including the heating of protected spaces for piglets (sucklings and weaned). Research results have established that different exploitation conditions in dwelling houses and live-stock premises demand careful estimation of heat pump type to be used in the pigsty. The more essential factor effecting the heat pump operation is the temperature of the heating surface, which for the floor heating in general, ranges between 25-30°C, but in the case of piglets and concrete floor panels, this temperature should range between 35-40°C. To increase the efficiency rate of heat pump, of particular interest is the microclimate control in livestock husbandry buildings. For that purpose, specially important is the usage of wet scrubber systems for air purification with low pressure drop. Besides the possibility of reducing the risk of microorganisms, organic and mineral dust, in interaction with heat pump, it is also possible to significantly increase energy saving, and improve the technological process output by increasing the quality of basic product and environment protection.
AB  - Radi uštede i racionalnog koršćenja energije, sve veća pažnja posvećuje se upotrebi toplotnih pumpi. Proizvođači i propagatori sistema toplotne pumpe akumulirali su pouzdana iskustva njihovog korišćenja u formi snabdevača toplote za domaćinstva, uglavnom putem sistema toplog poda. Moguća je upotreba toplotne energije dobijene toplotnom pumpom za različite procese u poljoprivredi, uključujući prasad, kako u prasilištima, tako i odgajivalištima, radi zagrevanja njihovih odmarališta. Na osnovu različitih eksploatacionih uslova u stanarskim i objektima za krupnu stoku, rezultati istraživanja ukazuju na značaj pažljive procene tipa toplotne pumpe za upotrebu, posebno u oborima za uzgoj svinja. Najesencijalniji faktor, koji deluje na efektivnost operativnosti toplotne pumpe, jeste temperatura zagrevne površine stambenih prostora zagrevanih sistemom toplog poda 25-30°C, dok je za odmarališna mesta prasadi zagrevana betonskim podnim panelom u okviru limita 35-40°C. Za povećanje koeficijenta efikasnosti vazdušne toplotne pumpe, od posebnog interesa je regulacija mikroklimata u stočarskim objektima. U tu svrhu, od posebnog interesa je upotreba vlažnih filtera za vazduh sa niskim padom pritiska. Pored mogućnosti redukcije opasnosti od mikroorganizama, organske i mineralne prašine, u interakciji sa toplotnom pumpom, moguće su značajne uštede toplotne energije, poboljšanja outputa tehnološkog procesa sa povišenjem kvaliteta baznog proizvoda i zaštite životne sredine.
PB  - Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad
T2  - Savremena poljoprivredna tehnika
T1  - Usage of heat pump in livestock husbandry
T1  - Primena toplotne pumpe u stočarstvu
EP  - 446
IS  - 4
SP  - 438
VL  - 36
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2200
ER  - 

@article{
author = "Zoranović, Miodrag and Dimitrijević, Aleksandra and Bajkin, Andjelko and Ponjičan, Ondrej and Ivanišević, Mladen and Potkonjak, Vlado",
year = "2010",
abstract = "In order to save and rationally use energy, the usage of heat pumps is getting ever more attention. Producers and distributors of heat pump systems have accumulated certain experience when it comes to using them for individual house heat supply, mainly in the form of floor heating. However, it is possible to use the heat energy obtained by a heat pump for different processes within agricultural production, including the heating of protected spaces for piglets (sucklings and weaned). Research results have established that different exploitation conditions in dwelling houses and live-stock premises demand careful estimation of heat pump type to be used in the pigsty. The more essential factor effecting the heat pump operation is the temperature of the heating surface, which for the floor heating in general, ranges between 25-30°C, but in the case of piglets and concrete floor panels, this temperature should range between 35-40°C. To increase the efficiency rate of heat pump, of particular interest is the microclimate control in livestock husbandry buildings. For that purpose, specially important is the usage of wet scrubber systems for air purification with low pressure drop. Besides the possibility of reducing the risk of microorganisms, organic and mineral dust, in interaction with heat pump, it is also possible to significantly increase energy saving, and improve the technological process output by increasing the quality of basic product and environment protection., Radi uštede i racionalnog koršćenja energije, sve veća pažnja posvećuje se upotrebi toplotnih pumpi. Proizvođači i propagatori sistema toplotne pumpe akumulirali su pouzdana iskustva njihovog korišćenja u formi snabdevača toplote za domaćinstva, uglavnom putem sistema toplog poda. Moguća je upotreba toplotne energije dobijene toplotnom pumpom za različite procese u poljoprivredi, uključujući prasad, kako u prasilištima, tako i odgajivalištima, radi zagrevanja njihovih odmarališta. Na osnovu različitih eksploatacionih uslova u stanarskim i objektima za krupnu stoku, rezultati istraživanja ukazuju na značaj pažljive procene tipa toplotne pumpe za upotrebu, posebno u oborima za uzgoj svinja. Najesencijalniji faktor, koji deluje na efektivnost operativnosti toplotne pumpe, jeste temperatura zagrevne površine stambenih prostora zagrevanih sistemom toplog poda 25-30°C, dok je za odmarališna mesta prasadi zagrevana betonskim podnim panelom u okviru limita 35-40°C. Za povećanje koeficijenta efikasnosti vazdušne toplotne pumpe, od posebnog interesa je regulacija mikroklimata u stočarskim objektima. U tu svrhu, od posebnog interesa je upotreba vlažnih filtera za vazduh sa niskim padom pritiska. Pored mogućnosti redukcije opasnosti od mikroorganizama, organske i mineralne prašine, u interakciji sa toplotnom pumpom, moguće su značajne uštede toplotne energije, poboljšanja outputa tehnološkog procesa sa povišenjem kvaliteta baznog proizvoda i zaštite životne sredine.",
publisher = "Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad",
journal = "Savremena poljoprivredna tehnika",
title = "Usage of heat pump in livestock husbandry, Primena toplotne pumpe u stočarstvu",
pages = "446-438",
number = "4",
volume = "36",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2200"
}

Zoranović, M., Dimitrijević, A., Bajkin, A., Ponjičan, O., Ivanišević, M.,& Potkonjak, V.. (2010). Usage of heat pump in livestock husbandry. in Savremena poljoprivredna tehnika
Nacionalno naučno društvo za poljoprivrednu tehniku, Novi Sad., 36(4), 438-446.
https://hdl.handle.net/21.15107/rcub_agrospace_2200

Zoranović M, Dimitrijević A, Bajkin A, Ponjičan O, Ivanišević M, Potkonjak V. Usage of heat pump in livestock husbandry. in Savremena poljoprivredna tehnika. 2010;36(4):438-446.
https://hdl.handle.net/21.15107/rcub_agrospace_2200 .

Zoranović, Miodrag, Dimitrijević, Aleksandra, Bajkin, Andjelko, Ponjičan, Ondrej, Ivanišević, Mladen, Potkonjak, Vlado, "Usage of heat pump in livestock husbandry" in Savremena poljoprivredna tehnika, 36, no. 4 (2010):438-446,
https://hdl.handle.net/21.15107/rcub_agrospace_2200 .