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  - 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  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Bajkin, Andjelko
AU  - Blažin, Slobodan
AU  - Blažin, Dragan
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3644
AB  - Greenhouse plant production is one of the most intensive parts of the agricultural production. In order to reduce the costs and save the energy, various greenhouse constructions and different coverings are offered to the farmers. One of the biggest problems is in winter production when additional heating and light are needed as well as in summer when intensive cooling is needed. During these period construction and coverings fully show their qualities. The aim of this research was to investigate the temperature and air relative humidity distribution in the different greenhouse constructions in the different production systems in order to see if the choice of the greenhouse construction can improve the production conditions inside the greenhouse enabling the better energy efficiency and lower energy input for heating / cooling. Air temperature and relative humidity were tracked in the open field and in the two types of greenhouses (tunnel and gutter connected type) in the lettuce and tomato production. Results show that temperature pattern and its values during the night and day depend on the greenhouse construction, plant specie that is grown and production season. Gutter connected type of construction showed more uniform production conditions inside the greenhouse. In the winter production conditions temperature oscillations were not significant and were lower compared to the values measured in the tunnel construction type greenhouse.
AB  - Proizvodnja u zaštićenom prostoru je jedna od najintenzivnijih grana poljoprivredne proizvodnje u smislu potrošnje energije i ostvarenog prinosa. Na tržištu je veliki broj pokrivnih materijala i materijala konstrukcije kojima se može uštedeti energija i time povećati energetska efikasnost proizvodnje u zaštićenom prostoru. Jedan od značajnijih problema koji se javlja kod ovog vida proizvodnje su nepovoljni temperaturni uslovi tokom zimskog i letnjeg perioda. Pravilnim izborom konstrukcije, pokrivnog materijala i orijentacije objekta nepovoljni uticaji niskih temperatura tokom zime i visokih temperatura tokom leta, se mogu ublažiti. Cilj ovog rada je bila analiza temperaturnih i uslova relativne vlažnosti vazduha u objektima zaštićenog prostora različite konstrukcije u proizvodnji salate i paradajza kako bi se videlo da li se izborom konstrukcije objekta zaštićenog prostora može uticati na ravnomernost proizvodnih uslova u objektima, i samim tim, na kvalitet proizvodnje i ostvareni prinos. Prema navedenom cilju, temperatura i relativna vlažnost vazduha su praćeni unutar objekta (njegovom dužinom i visinom) i izvan objekta, tokom proizvodnje zelene salate i paradajza. U istraživanje su bila uključena dva objekta zaštićenog prostora, i to tunel i dvobrodni plastenik. Rezultati ukazuju na postojanje razlika u rasporedu temperature i relativne vlažnosti vazduha unutar objekata različite konstrukcije. Blok objekat se pokazao kao sredina sa uniformnim rasporedom temperature i relativne vlažnosti dužinom objekta tokom čitavog dana. U zimskom periodu su oscilacije temperature bile manje značajne nego kod objekta tunel tipa.
PB  - Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad
T2  - Journal on Processing and Energy in Agriculture
T1  - Uniformity of air temperature and relative humidity inside and outside the different types of greenhouses
T1  - Distribucija temperature i relativne vlažnosti vazduha unutar objekata zaštićenog prostora različite konstrukcije
EP  - 110
IS  - 3
SP  - 107
VL  - 18
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3644
ER  - 

@article{
author = "Dimitrijević, Aleksandra and Bajkin, Andjelko and Blažin, Slobodan and Blažin, Dragan",
year = "2014",
abstract = "Greenhouse plant production is one of the most intensive parts of the agricultural production. In order to reduce the costs and save the energy, various greenhouse constructions and different coverings are offered to the farmers. One of the biggest problems is in winter production when additional heating and light are needed as well as in summer when intensive cooling is needed. During these period construction and coverings fully show their qualities. The aim of this research was to investigate the temperature and air relative humidity distribution in the different greenhouse constructions in the different production systems in order to see if the choice of the greenhouse construction can improve the production conditions inside the greenhouse enabling the better energy efficiency and lower energy input for heating / cooling. Air temperature and relative humidity were tracked in the open field and in the two types of greenhouses (tunnel and gutter connected type) in the lettuce and tomato production. Results show that temperature pattern and its values during the night and day depend on the greenhouse construction, plant specie that is grown and production season. Gutter connected type of construction showed more uniform production conditions inside the greenhouse. In the winter production conditions temperature oscillations were not significant and were lower compared to the values measured in the tunnel construction type greenhouse., Proizvodnja u zaštićenom prostoru je jedna od najintenzivnijih grana poljoprivredne proizvodnje u smislu potrošnje energije i ostvarenog prinosa. Na tržištu je veliki broj pokrivnih materijala i materijala konstrukcije kojima se može uštedeti energija i time povećati energetska efikasnost proizvodnje u zaštićenom prostoru. Jedan od značajnijih problema koji se javlja kod ovog vida proizvodnje su nepovoljni temperaturni uslovi tokom zimskog i letnjeg perioda. Pravilnim izborom konstrukcije, pokrivnog materijala i orijentacije objekta nepovoljni uticaji niskih temperatura tokom zime i visokih temperatura tokom leta, se mogu ublažiti. Cilj ovog rada je bila analiza temperaturnih i uslova relativne vlažnosti vazduha u objektima zaštićenog prostora različite konstrukcije u proizvodnji salate i paradajza kako bi se videlo da li se izborom konstrukcije objekta zaštićenog prostora može uticati na ravnomernost proizvodnih uslova u objektima, i samim tim, na kvalitet proizvodnje i ostvareni prinos. Prema navedenom cilju, temperatura i relativna vlažnost vazduha su praćeni unutar objekta (njegovom dužinom i visinom) i izvan objekta, tokom proizvodnje zelene salate i paradajza. U istraživanje su bila uključena dva objekta zaštićenog prostora, i to tunel i dvobrodni plastenik. Rezultati ukazuju na postojanje razlika u rasporedu temperature i relativne vlažnosti vazduha unutar objekata različite konstrukcije. Blok objekat se pokazao kao sredina sa uniformnim rasporedom temperature i relativne vlažnosti dužinom objekta tokom čitavog dana. U zimskom periodu su oscilacije temperature bile manje značajne nego kod objekta tunel tipa.",
publisher = "Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad",
journal = "Journal on Processing and Energy in Agriculture",
title = "Uniformity of air temperature and relative humidity inside and outside the different types of greenhouses, Distribucija temperature i relativne vlažnosti vazduha unutar objekata zaštićenog prostora različite konstrukcije",
pages = "110-107",
number = "3",
volume = "18",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3644"
}

Dimitrijević, A., Bajkin, A., Blažin, S.,& Blažin, D.. (2014). Uniformity of air temperature and relative humidity inside and outside the different types of greenhouses. in Journal on Processing and Energy in Agriculture
Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad., 18(3), 107-110.
https://hdl.handle.net/21.15107/rcub_agrospace_3644

Dimitrijević A, Bajkin A, Blažin S, Blažin D. Uniformity of air temperature and relative humidity inside and outside the different types of greenhouses. in Journal on Processing and Energy in Agriculture. 2014;18(3):107-110.
https://hdl.handle.net/21.15107/rcub_agrospace_3644 .

Dimitrijević, Aleksandra, Bajkin, Andjelko, Blažin, Slobodan, Blažin, Dragan, "Uniformity of air temperature and relative humidity inside and outside the different types of greenhouses" in Journal on Processing and Energy in Agriculture, 18, no. 3 (2014):107-110,
https://hdl.handle.net/21.15107/rcub_agrospace_3644 .

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  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Bajkin, Andjelko
AU  - Zoranović, Miodrag
AU  - Ralević, Ivana
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2928
AB  - The aim of the research was to make a simple model which can help producers when starting the greenhouse production system. Based on the chosen plant production and available production area, the model suggests which type of greenhouse farmers should, as well as the optimal technical systems and area for further expansion. The control of the model flow was carried out in the MS Excel program. During the testing phase, it was concluded that the MS Excel is not so good in programming so Quick Basic version 4.5 was used and it appeared simpler and easier for programming. The results show that the model is very suitable for producers, to whom adequate solutions of the greenhouse production systems can be suggested, based on its elementary idea in terms of the greenhouse construction type and technical systems with their capacities. .
AB  - U radu je prikazan model izbora optimalnog tehnološko-tehničkog sistema gajenja u kontrolisanim uslovima. Cilj je bio napraviti model, kao pomoć proizvođačima, kojim bi se, na osnovu njihove početne ideje, sugerisali objekti, tehnički sistemi i prateća infrastruktura sa potrebnim parametrima vezanim za kapacitivnost. Na osnovu izabrane gajene kulture i raspoložive površine model, kao izlazne parametre, daje tip konstrukcije i orijentaciju objekta, tehnološki sistem gajenja, tehnološko-tehničke sisteme ventilacije, grejanja, navodnjavanja i njihove potrebne kapacitete, zatim površinu neophodnu za prateće objekte kao površinu predviđenu za buduće proširenje. Provera algoritma modela je, obzirom na široku primenu MS Office Programa, izvedena u MS Excelu. Tokom provere modela, ustanovljeno je da MS Excel nije jednostavan za programiranje određenih koraka i kontinualno vođenje modela. Jedan deo provere rada modela je izveden u Quick Basic programu, verzija 4.5. koji se pokazao kao puno jednostavniji za programiranje i vođenje algoritma. Utvrđeno je da je predloženi model funkcionalan ali su potrebna dalja poboljšanja u smislu uvođenja većeg broja gajenih kultura i stalnog dopunjavanja baze podataka o tipovima i oblicima konstrukcija objekata zaštićenog prostora i pokrivnih materijala. .
PB  - Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad
T2  - Journal on Processing and Energy in Agriculture
T1  - Decision support model for energy efficient greenhouse production system
T1  - Model izbora energetski efikasnog tehnološko-tehničkog sistema gajenja biljaka u kontrolisanim uslovima
EP  - 60
IS  - 2
SP  - 57
VL  - 16
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2928
ER  - 

@article{
author = "Dimitrijević, Aleksandra and Bajkin, Andjelko and Zoranović, Miodrag and Ralević, Ivana",
year = "2012",
abstract = "The aim of the research was to make a simple model which can help producers when starting the greenhouse production system. Based on the chosen plant production and available production area, the model suggests which type of greenhouse farmers should, as well as the optimal technical systems and area for further expansion. The control of the model flow was carried out in the MS Excel program. During the testing phase, it was concluded that the MS Excel is not so good in programming so Quick Basic version 4.5 was used and it appeared simpler and easier for programming. The results show that the model is very suitable for producers, to whom adequate solutions of the greenhouse production systems can be suggested, based on its elementary idea in terms of the greenhouse construction type and technical systems with their capacities. ., U radu je prikazan model izbora optimalnog tehnološko-tehničkog sistema gajenja u kontrolisanim uslovima. Cilj je bio napraviti model, kao pomoć proizvođačima, kojim bi se, na osnovu njihove početne ideje, sugerisali objekti, tehnički sistemi i prateća infrastruktura sa potrebnim parametrima vezanim za kapacitivnost. Na osnovu izabrane gajene kulture i raspoložive površine model, kao izlazne parametre, daje tip konstrukcije i orijentaciju objekta, tehnološki sistem gajenja, tehnološko-tehničke sisteme ventilacije, grejanja, navodnjavanja i njihove potrebne kapacitete, zatim površinu neophodnu za prateće objekte kao površinu predviđenu za buduće proširenje. Provera algoritma modela je, obzirom na široku primenu MS Office Programa, izvedena u MS Excelu. Tokom provere modela, ustanovljeno je da MS Excel nije jednostavan za programiranje određenih koraka i kontinualno vođenje modela. Jedan deo provere rada modela je izveden u Quick Basic programu, verzija 4.5. koji se pokazao kao puno jednostavniji za programiranje i vođenje algoritma. Utvrđeno je da je predloženi model funkcionalan ali su potrebna dalja poboljšanja u smislu uvođenja većeg broja gajenih kultura i stalnog dopunjavanja baze podataka o tipovima i oblicima konstrukcija objekata zaštićenog prostora i pokrivnih materijala. .",
publisher = "Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad",
journal = "Journal on Processing and Energy in Agriculture",
title = "Decision support model for energy efficient greenhouse production system, Model izbora energetski efikasnog tehnološko-tehničkog sistema gajenja biljaka u kontrolisanim uslovima",
pages = "60-57",
number = "2",
volume = "16",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2928"
}

Dimitrijević, A., Bajkin, A., Zoranović, M.,& Ralević, I.. (2012). Decision support model for energy efficient greenhouse production system. in Journal on Processing and Energy in Agriculture
Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad., 16(2), 57-60.
https://hdl.handle.net/21.15107/rcub_agrospace_2928

Dimitrijević A, Bajkin A, Zoranović M, Ralević I. Decision support model for energy efficient greenhouse production system. in Journal on Processing and Energy in Agriculture. 2012;16(2):57-60.
https://hdl.handle.net/21.15107/rcub_agrospace_2928 .

Dimitrijević, Aleksandra, Bajkin, Andjelko, Zoranović, Miodrag, Ralević, Ivana, "Decision support model for energy efficient greenhouse production system" in Journal on Processing and Energy in Agriculture, 16, no. 2 (2012):57-60,
https://hdl.handle.net/21.15107/rcub_agrospace_2928 .

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  - Dimitrijević, Aleksandra
AU  - Bajkin, Andjelko
AU  - Djević, Milan
AU  - Urošević, Mirko
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2649
AB  - The aim of this research was to define tomato greenhouse production regarding the energy consumption in order to find the critical points in the energy flow, that can be eliminated or their influence reduced by choosing the adequate type of construction, production technology and culture that will be produced. Energy parameters were determined for four different greenhouse constructions. On the basis of tomato yield, production output and the energy input (fuel, electricity, straw, fertilizer, plant protection chemicals, water, human labor, technical systems), 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, 21.96 MJ/m2. The highest energy consumption was measured for the tunnel structure, 26.87 MJ/m2. The highest tomato yield was obtained in multispan greenhouse with thirteen bays, 35.81 kg/m2. As for the energy parameters, the highest energy input was measured for the tunnel structure, 1.55 MJ/kg while the lowest was obtained in multi-span greenhouse with thirteen bays, 0.65 MJ/kg. The highest energy ratio was calculated for the multi-span greenhouse with thirteen bays, 1.23 as well as the highest energy productivity, 1.55 kg/MJ.
AB  - Cilj ovog rada je bio da se definiše proizvodnja paradajza u zaštićenom prostoru sa aspekta potrošnje energije kako bi se uočila kritična mesta u energetskom bilansu proizvodnje i kako bi se utvrdilo da li se izborom konstrukcije objekta zaštićenog prostora može uticati na energetski bilans proizvodnog sistema. Energetski bilans je utvrđen za četiri tipa konstrukcije objekata zaštićenog prostora. Na osnovu prinosa paradajza, energetskog inputa i energetskog outputa određeni su specifični energetski input, energetski odnos i energetska produktivnost. Rezultati pokazuju da je najniža potrošnja energije po jedinici površine ostvarena u objektu sa dva bloka, 21,96 MJ/m2 dok je najviša potrošnja energije izmerena u objektu tunel tipa, 26,87 MJ/m2. Najviši prinos paradajza ostvaren je u blok plasteniku sa trinaest blokova, 35,81 kg/m2. Kada se pogleda energetski bilans, najviši energetski input utvrđen je za objekat tunel tipa 1,55 MJ/kg a najniži za blok plastenik sa trinaest blokova 0,65 MJ/kg. Najviši energetski odnos je zabeležen kod blok objekta sa trinaest blokova, 1,23 kao i najviša energetska produktivnost, 1,55 kg/MJ.
PB  - Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad
T2  - Journal on Processing and Energy in Agriculture
T1  - Energy productivity of the tomato greenhouse production
T1  - Energetska produktivnost proizvodnje paradajza u objektima zaštićenog prostora
EP  - 142
IS  - 3
SP  - 138
VL  - 15
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2649
ER  - 

@article{
author = "Dimitrijević, Aleksandra and Bajkin, Andjelko and Djević, Milan and Urošević, Mirko",
year = "2011",
abstract = "The aim of this research was to define tomato greenhouse production regarding the energy consumption in order to find the critical points in the energy flow, that can be eliminated or their influence reduced by choosing the adequate type of construction, production technology and culture that will be produced. Energy parameters were determined for four different greenhouse constructions. On the basis of tomato yield, production output and the energy input (fuel, electricity, straw, fertilizer, plant protection chemicals, water, human labor, technical systems), 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, 21.96 MJ/m2. The highest energy consumption was measured for the tunnel structure, 26.87 MJ/m2. The highest tomato yield was obtained in multispan greenhouse with thirteen bays, 35.81 kg/m2. As for the energy parameters, the highest energy input was measured for the tunnel structure, 1.55 MJ/kg while the lowest was obtained in multi-span greenhouse with thirteen bays, 0.65 MJ/kg. The highest energy ratio was calculated for the multi-span greenhouse with thirteen bays, 1.23 as well as the highest energy productivity, 1.55 kg/MJ., Cilj ovog rada je bio da se definiše proizvodnja paradajza u zaštićenom prostoru sa aspekta potrošnje energije kako bi se uočila kritična mesta u energetskom bilansu proizvodnje i kako bi se utvrdilo da li se izborom konstrukcije objekta zaštićenog prostora može uticati na energetski bilans proizvodnog sistema. Energetski bilans je utvrđen za četiri tipa konstrukcije objekata zaštićenog prostora. Na osnovu prinosa paradajza, energetskog inputa i energetskog outputa određeni su specifični energetski input, energetski odnos i energetska produktivnost. Rezultati pokazuju da je najniža potrošnja energije po jedinici površine ostvarena u objektu sa dva bloka, 21,96 MJ/m2 dok je najviša potrošnja energije izmerena u objektu tunel tipa, 26,87 MJ/m2. Najviši prinos paradajza ostvaren je u blok plasteniku sa trinaest blokova, 35,81 kg/m2. Kada se pogleda energetski bilans, najviši energetski input utvrđen je za objekat tunel tipa 1,55 MJ/kg a najniži za blok plastenik sa trinaest blokova 0,65 MJ/kg. Najviši energetski odnos je zabeležen kod blok objekta sa trinaest blokova, 1,23 kao i najviša energetska produktivnost, 1,55 kg/MJ.",
publisher = "Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad",
journal = "Journal on Processing and Energy in Agriculture",
title = "Energy productivity of the tomato greenhouse production, Energetska produktivnost proizvodnje paradajza u objektima zaštićenog prostora",
pages = "142-138",
number = "3",
volume = "15",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2649"
}

Dimitrijević, A., Bajkin, A., Djević, M.,& Urošević, M.. (2011). Energy productivity of the tomato greenhouse production. in Journal on Processing and Energy in Agriculture
Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad., 15(3), 138-142.
https://hdl.handle.net/21.15107/rcub_agrospace_2649

Dimitrijević A, Bajkin A, Djević M, Urošević M. Energy productivity of the tomato greenhouse production. in Journal on Processing and Energy in Agriculture. 2011;15(3):138-142.
https://hdl.handle.net/21.15107/rcub_agrospace_2649 .

Dimitrijević, Aleksandra, Bajkin, Andjelko, Djević, Milan, Urošević, Mirko, "Energy productivity of the tomato greenhouse production" in Journal on Processing and Energy in Agriculture, 15, no. 3 (2011):138-142,
https://hdl.handle.net/21.15107/rcub_agrospace_2649 .

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 .