TY  - JOUR
AU  - Grubišić, Mirko
AU  - Hojka, Zdravko M.
PY  - 2003
UR  - https://ritnms.itnms.ac.rs/handle/123456789/41
AB  - U radu su prikazani rezultati određivanja sadržaja, sastava i osobina humusa kraljevačkog pseudogleja u pet profila koji reprezentuju tri različita varijeteta prema načinu njegovog korišćenja i to šumski (1), livadski (2) i njivski (3), pri čemu je otvaranje izvršeno na neđubrenoj, đubrenoj sa NPK i đubrenoj sa NPK+Ca varijanti. Određivanje frakcionog sastava humusa vršeno je metodom Kononove i Beljčikove, a sadržaj ugljenika u zemljištu ekstraktima i huminskim kiselinama bihromatnom metodom Tjurina u modifikaciji Simakova. Optička gustina i prag koagulacije (izoelektrična tačka) huminskih kiselina određivani su postupcima po Kononovoj. Najvećim sadržajem humusa 5,83 % karakteriše se šumski varijetet, potom livadski sa 3,00 %, njivski neđubreni 1,79 %, đubreni 1,57 % i đubreni + Ca 1,52 %. Preovlađivanje fulvo nad huminskim kiselinama u širokom intervalu (Chk/Cfk 0,35-0,98), izuzimajući njivski varijetet đubreni+Ca (Chk/Cfk, 1,50-2,80) je bitna karakteristika frakcionog sastava humusa ispitivanih varijeteta pseudogleja. Visoko preovlađivanje huminskih kiselina slobodnih i vezanih mobilnim R2O3, nad huminskim kiselinama vezanim sa Ca, u humusnom i eluvijalnom horizintu šumskog i livadskog varijeteta, njihova signifikantna dominacija u humusnom horizontu njivskog, veoma izražena u humusnom i eluvijalnom horizontu njivskog sa NPK i skoro potpuno izjednačenje ovih frakcija u njivskom sa NPK+Ca, takođe je jedna od bitnih karakteristika humusa. Udeo humina varira u dijapazonu od 40,3 do 65,8 %. Prema odnosu ekstinkcija E4:E6, najmanju kondenzovanost aromatskih jezgara huminskih kiselina ima šumski (5,67), povoljniju njivski (5,00-5,17) varijeteti, a najpovoljniju (4,64) livadski varijetet pseudogleja. Vrednosti praga koagulacije, odnosno izoelektrične tačke, huminskih kiselina (16-20 meq. CaCl2 na 1/l humata) ukazuju na visok stepen njihove disperznosti i uniformnosti.
AB  - The paper encompasses the results on contents, compositions and properties of humus determined in pseudogley of the Kraljevo area in five profiles that represent three different types according to their mode of utilisation: 1) forest soil type, 2) meadow soil type and 3) arable field soil type. The opening of the profiles was performed on unfertilised soil, soil fertilised with NPK (120:120:80) and soil fertilised with NPK + 5,000 kg Ca fertiliser ha-1. On the basis of the obtained results it was established that the highest humus content had been detected in the forest soil (5.83%), followed by the meadow soil (3.00%), while the lowest humus content had characterised the unfertilised arable field soil (only 1.79%). The decreasing tendency of the humus content in arable field types of soil fertilised with NPK (1.57%) and NPK + Ca fertiliser (1.52%) has been continued, indicating an improvement of the conditions for organic matter mineralisation, as well as a necessity of the humisation application, together with mineral fertilisation and calcification of pseudogley soils in order to maintain and improve their adsorptive complex. An important characteristic of a humus fraction composition in investigated soil types, except in arable field soil with incorporated Ca fertiliser, is prevailing fulvo over humic acids, which may be observed from the ratio Chk/Cfk, that range from 0.35 to 0.98, with the highest participation of fulvo acids in unfertilised arable field soil. In the arable field variety with incorporated Ca fertiliser, this ratio changed drastically down to the depth of 45 cm, varying within the range of 1.50-2.80, which indicated a stabilising character of the processes caused by the incorporated Ca and a decrease in humic acid mobility by formation of corresponding humates. On the basis of the extinction ratio E4:E6, it was determined that the lowest (5.67), i.e. highest (4.64) degree of humic acid condensation, i.e. of their aromatic nuclei condensation, was present in the forest soil, i.e. the meadow soil, respectively. The determination of coagulation threshold, i.e. of the isoelectric point, of humic acids indicates a high degree of their dispersion and uniformity in that aspect considering that complete coagulation is achieved by utilisation of 16-20 m.eq CaCl2 per 1 l of humate.
PB  - Savez poljoprivrednih inženjera i tehničara, Beograd
T2  - Journal of Scientific Agricultural Research
T1  - Sadržaj, sastav i osobine humusa kraljevačkog pseudogleja pod različitim načinom korišćenja i primenjenim meliorativnim merama
T1  - Humus content, composition and properties of pseudogley in the region of Kraljevo with different modes of utilisation and applied melioration measurements
EP  - 154
IS  - 3-4
SP  - 143
VL  - 64
UR  - conv_266
ER  - 

@article{
author = "Grubišić, Mirko and Hojka, Zdravko M.",
year = "2003",
abstract = "U radu su prikazani rezultati određivanja sadržaja, sastava i osobina humusa kraljevačkog pseudogleja u pet profila koji reprezentuju tri različita varijeteta prema načinu njegovog korišćenja i to šumski (1), livadski (2) i njivski (3), pri čemu je otvaranje izvršeno na neđubrenoj, đubrenoj sa NPK i đubrenoj sa NPK+Ca varijanti. Određivanje frakcionog sastava humusa vršeno je metodom Kononove i Beljčikove, a sadržaj ugljenika u zemljištu ekstraktima i huminskim kiselinama bihromatnom metodom Tjurina u modifikaciji Simakova. Optička gustina i prag koagulacije (izoelektrična tačka) huminskih kiselina određivani su postupcima po Kononovoj. Najvećim sadržajem humusa 5,83 % karakteriše se šumski varijetet, potom livadski sa 3,00 %, njivski neđubreni 1,79 %, đubreni 1,57 % i đubreni + Ca 1,52 %. Preovlađivanje fulvo nad huminskim kiselinama u širokom intervalu (Chk/Cfk 0,35-0,98), izuzimajući njivski varijetet đubreni+Ca (Chk/Cfk, 1,50-2,80) je bitna karakteristika frakcionog sastava humusa ispitivanih varijeteta pseudogleja. Visoko preovlađivanje huminskih kiselina slobodnih i vezanih mobilnim R2O3, nad huminskim kiselinama vezanim sa Ca, u humusnom i eluvijalnom horizintu šumskog i livadskog varijeteta, njihova signifikantna dominacija u humusnom horizontu njivskog, veoma izražena u humusnom i eluvijalnom horizontu njivskog sa NPK i skoro potpuno izjednačenje ovih frakcija u njivskom sa NPK+Ca, takođe je jedna od bitnih karakteristika humusa. Udeo humina varira u dijapazonu od 40,3 do 65,8 %. Prema odnosu ekstinkcija E4:E6, najmanju kondenzovanost aromatskih jezgara huminskih kiselina ima šumski (5,67), povoljniju njivski (5,00-5,17) varijeteti, a najpovoljniju (4,64) livadski varijetet pseudogleja. Vrednosti praga koagulacije, odnosno izoelektrične tačke, huminskih kiselina (16-20 meq. CaCl2 na 1/l humata) ukazuju na visok stepen njihove disperznosti i uniformnosti., The paper encompasses the results on contents, compositions and properties of humus determined in pseudogley of the Kraljevo area in five profiles that represent three different types according to their mode of utilisation: 1) forest soil type, 2) meadow soil type and 3) arable field soil type. The opening of the profiles was performed on unfertilised soil, soil fertilised with NPK (120:120:80) and soil fertilised with NPK + 5,000 kg Ca fertiliser ha-1. On the basis of the obtained results it was established that the highest humus content had been detected in the forest soil (5.83%), followed by the meadow soil (3.00%), while the lowest humus content had characterised the unfertilised arable field soil (only 1.79%). The decreasing tendency of the humus content in arable field types of soil fertilised with NPK (1.57%) and NPK + Ca fertiliser (1.52%) has been continued, indicating an improvement of the conditions for organic matter mineralisation, as well as a necessity of the humisation application, together with mineral fertilisation and calcification of pseudogley soils in order to maintain and improve their adsorptive complex. An important characteristic of a humus fraction composition in investigated soil types, except in arable field soil with incorporated Ca fertiliser, is prevailing fulvo over humic acids, which may be observed from the ratio Chk/Cfk, that range from 0.35 to 0.98, with the highest participation of fulvo acids in unfertilised arable field soil. In the arable field variety with incorporated Ca fertiliser, this ratio changed drastically down to the depth of 45 cm, varying within the range of 1.50-2.80, which indicated a stabilising character of the processes caused by the incorporated Ca and a decrease in humic acid mobility by formation of corresponding humates. On the basis of the extinction ratio E4:E6, it was determined that the lowest (5.67), i.e. highest (4.64) degree of humic acid condensation, i.e. of their aromatic nuclei condensation, was present in the forest soil, i.e. the meadow soil, respectively. The determination of coagulation threshold, i.e. of the isoelectric point, of humic acids indicates a high degree of their dispersion and uniformity in that aspect considering that complete coagulation is achieved by utilisation of 16-20 m.eq CaCl2 per 1 l of humate.",
publisher = "Savez poljoprivrednih inženjera i tehničara, Beograd",
journal = "Journal of Scientific Agricultural Research",
title = "Sadržaj, sastav i osobine humusa kraljevačkog pseudogleja pod različitim načinom korišćenja i primenjenim meliorativnim merama, Humus content, composition and properties of pseudogley in the region of Kraljevo with different modes of utilisation and applied melioration measurements",
pages = "154-143",
number = "3-4",
volume = "64",
url = "conv_266"
}

Grubišić, M.,& Hojka, Z. M.. (2003). Sadržaj, sastav i osobine humusa kraljevačkog pseudogleja pod različitim načinom korišćenja i primenjenim meliorativnim merama. in Journal of Scientific Agricultural Research
Savez poljoprivrednih inženjera i tehničara, Beograd., 64(3-4), 143-154.
conv_266

Grubišić M, Hojka ZM. Sadržaj, sastav i osobine humusa kraljevačkog pseudogleja pod različitim načinom korišćenja i primenjenim meliorativnim merama. in Journal of Scientific Agricultural Research. 2003;64(3-4):143-154.
conv_266 .

Grubišić, Mirko, Hojka, Zdravko M., "Sadržaj, sastav i osobine humusa kraljevačkog pseudogleja pod različitim načinom korišćenja i primenjenim meliorativnim merama" in Journal of Scientific Agricultural Research, 64, no. 3-4 (2003):143-154,
conv_266 .

TY  - JOUR
AU  - Hojka, Zdravko M.
AU  - Grubišić, Mirko
PY  - 2003
UR  - https://ritnms.itnms.ac.rs/handle/123456789/47
AB  - U periodu 1998-1999. godine obavljena su ispitivanja u Institutu za kukuruz "Zemun Polje" u kojima je analiziran prinos semena inbred linija kukuruza u zavisnosti od sadržaja mineralnog azota u zemljištu tipa semigleno-karbonatni černozem. U ogledu su ispitivane tri inbred linije kukuruza (L1, L2 i L3) različitih grupa zrenja (FAO 300, 500 i 700) i primenjeno je pet varijanti đubrenja: I - kontrola bez primene đubriva; II N60P60K60 u jesen; III - N60P60K60 u jesen + đubrenje azotom na bazi Nmin metode (sa dopunom do 120 kg ha-1); IV - N60P60K60 u jesen + 60 kg N ha-1 u proleće; V - N60P60K60 u jesen + 120 kg N ha-1 u proleće. Prinos semena inbred linija kukuruza je varirao zavisno od meteoroloških uslova, genotipa i primenjenih doza azota. U obe godine ispitivanja, zabeležena je vrlo značajna pozitivna korelacija između sadržaja mineralnog azota u zemljištu u fazi svilanja i prinosa semena inbred linija kukuruza. Samo je kod linije L3 zabeleženo značajno povećanje prinosa semena usled povećanja sadržaja mineralnog azota u zemljištu. Prosečno za obe godine ispitivanja i sva tri genotipa, povećanje sadržaja mineralnog azota u zemljištu u fazi svilanja inbred linija kukuruza, uticalo je vrlo značajno na povećanje prinosa semena na tretmanu đubrenja po Nmin metodi, kao i na tretmanima gde je primenjeno 60 i 180 kg N ha-1.
AB  - The maize seed production is usually performed on soil of a very good quality. Soil quality presents a capacity of soil to meet requirements of plants and therefore of animals too, and to provide the transport and regulation of water and other compounds present and added to soils. The application of nitrogen fertilisers is very important for the maize seed production, due to, first of all, the importance of nitrogen for growth and development of plants, as well as, to its dynamics in soil. The trials with the aim to analyse seed yield of maize inbred lines in dependence on the mineral nitrogen content in the semi-gley calcareous chernozem soil were conducted in the experimental field of the Maize Research Institute, Zemun Polje, during 1998 and 1999. Three maize inbred lines (L1, L2 and L3) of different maturity groups (FAO 300, FAO 500 and FAO 700, respectively) were used in the trial, while the following five fertilisation variants were applied: I - control without the mineral fertiliser application; II N60P60K60 in autumn; III - N60P60K60 in autumn + fertilising based on the Nmin-method - with the addition up to 120 kg N ha-1; IV - N60P60K60 in autumn + 60 kg N ha-1 in spring; V - N60P60K60 in autumn + 120 kg N ha-1 in spring. 	Seed yield of maize inbred lines varied over weather conditions genotypes and applied nitrogen fertiliser rates. In both years of investigations, a highly significant positive correlation between the mineral nitrogen content in the soil during the silking stage and seed yield of maize inbred lines was recorded. Seed yield was significantly increased only in the inbred L3 due to the increased content of mineral nitrogen in the soil. On the average for both years and all three genotypes, the increased content of mineral nitrogen in the soil in the silking stage of maize inbred lines significantly affected the seed yield increase on the variant based on the Nmin method, as well as, on the variants with 60 and 180 kg N ha-1.
PB  - Savez poljoprivrednih inženjera i tehničara, Beograd
T2  - Journal of Scientific Agricultural Research
T1  - Zavisnost prinosa semena inbred linija kukuruza od sadržaja mineralnog azota u zemljištu u fazi svilanja
T1  - The dependence of seed yield of maize inbred lines on the content of mineral nitrogen in soil in the silking stage
EP  - 135
IS  - 1-2
SP  - 125
VL  - 64
UR  - conv_265
ER  - 

@article{
author = "Hojka, Zdravko M. and Grubišić, Mirko",
year = "2003",
abstract = "U periodu 1998-1999. godine obavljena su ispitivanja u Institutu za kukuruz "Zemun Polje" u kojima je analiziran prinos semena inbred linija kukuruza u zavisnosti od sadržaja mineralnog azota u zemljištu tipa semigleno-karbonatni černozem. U ogledu su ispitivane tri inbred linije kukuruza (L1, L2 i L3) različitih grupa zrenja (FAO 300, 500 i 700) i primenjeno je pet varijanti đubrenja: I - kontrola bez primene đubriva; II N60P60K60 u jesen; III - N60P60K60 u jesen + đubrenje azotom na bazi Nmin metode (sa dopunom do 120 kg ha-1); IV - N60P60K60 u jesen + 60 kg N ha-1 u proleće; V - N60P60K60 u jesen + 120 kg N ha-1 u proleće. Prinos semena inbred linija kukuruza je varirao zavisno od meteoroloških uslova, genotipa i primenjenih doza azota. U obe godine ispitivanja, zabeležena je vrlo značajna pozitivna korelacija između sadržaja mineralnog azota u zemljištu u fazi svilanja i prinosa semena inbred linija kukuruza. Samo je kod linije L3 zabeleženo značajno povećanje prinosa semena usled povećanja sadržaja mineralnog azota u zemljištu. Prosečno za obe godine ispitivanja i sva tri genotipa, povećanje sadržaja mineralnog azota u zemljištu u fazi svilanja inbred linija kukuruza, uticalo je vrlo značajno na povećanje prinosa semena na tretmanu đubrenja po Nmin metodi, kao i na tretmanima gde je primenjeno 60 i 180 kg N ha-1., The maize seed production is usually performed on soil of a very good quality. Soil quality presents a capacity of soil to meet requirements of plants and therefore of animals too, and to provide the transport and regulation of water and other compounds present and added to soils. The application of nitrogen fertilisers is very important for the maize seed production, due to, first of all, the importance of nitrogen for growth and development of plants, as well as, to its dynamics in soil. The trials with the aim to analyse seed yield of maize inbred lines in dependence on the mineral nitrogen content in the semi-gley calcareous chernozem soil were conducted in the experimental field of the Maize Research Institute, Zemun Polje, during 1998 and 1999. Three maize inbred lines (L1, L2 and L3) of different maturity groups (FAO 300, FAO 500 and FAO 700, respectively) were used in the trial, while the following five fertilisation variants were applied: I - control without the mineral fertiliser application; II N60P60K60 in autumn; III - N60P60K60 in autumn + fertilising based on the Nmin-method - with the addition up to 120 kg N ha-1; IV - N60P60K60 in autumn + 60 kg N ha-1 in spring; V - N60P60K60 in autumn + 120 kg N ha-1 in spring. 	Seed yield of maize inbred lines varied over weather conditions genotypes and applied nitrogen fertiliser rates. In both years of investigations, a highly significant positive correlation between the mineral nitrogen content in the soil during the silking stage and seed yield of maize inbred lines was recorded. Seed yield was significantly increased only in the inbred L3 due to the increased content of mineral nitrogen in the soil. On the average for both years and all three genotypes, the increased content of mineral nitrogen in the soil in the silking stage of maize inbred lines significantly affected the seed yield increase on the variant based on the Nmin method, as well as, on the variants with 60 and 180 kg N ha-1.",
publisher = "Savez poljoprivrednih inženjera i tehničara, Beograd",
journal = "Journal of Scientific Agricultural Research",
title = "Zavisnost prinosa semena inbred linija kukuruza od sadržaja mineralnog azota u zemljištu u fazi svilanja, The dependence of seed yield of maize inbred lines on the content of mineral nitrogen in soil in the silking stage",
pages = "135-125",
number = "1-2",
volume = "64",
url = "conv_265"
}

Hojka, Z. M.,& Grubišić, M.. (2003). Zavisnost prinosa semena inbred linija kukuruza od sadržaja mineralnog azota u zemljištu u fazi svilanja. in Journal of Scientific Agricultural Research
Savez poljoprivrednih inženjera i tehničara, Beograd., 64(1-2), 125-135.
conv_265

Hojka ZM, Grubišić M. Zavisnost prinosa semena inbred linija kukuruza od sadržaja mineralnog azota u zemljištu u fazi svilanja. in Journal of Scientific Agricultural Research. 2003;64(1-2):125-135.
conv_265 .

Hojka, Zdravko M., Grubišić, Mirko, "Zavisnost prinosa semena inbred linija kukuruza od sadržaja mineralnog azota u zemljištu u fazi svilanja" in Journal of Scientific Agricultural Research, 64, no. 1-2 (2003):125-135,
conv_265 .

TY  - JOUR
AU  - Hojka, Zdravko M.
AU  - Grubišić, Mirko
PY  - 2002
UR  - https://ritnms.itnms.ac.rs/handle/123456789/35
AB  - Ispitivanja su obavljena na oglednom polju Instituta za kukuruz "Zemun Polje" tokom 1998. i 1999, na zemljištu tipa semiglejno-karbonatni černozem. U ogledu su korišćene tri inbred linije kukuruza (L1, L2 i L3) različitih grupa zrenja (FAO 300, 500 i 700) i primenjeno je pet varijanti đubrenja: I - kontrola bez primene đubriva; II - 60 kg P2O5/K2O ha-1, 60 kg N ha-1; III - 60 kg P2O5/K2O ha-1, đubrenje azotom na bazi N-min metode (sa dopunom do 120 kg ha-1); IV - 60 kg P2O5/K2O ha-1, 120 kg N ha-1; V - 60 kg P2O5/K2O ha-1, 180 kg N ha-1. Dinamika mineralnog azota u zemljištu zavisila je od meteoroloških uslova u toku izvođenja eksperimenta. Sadržaj mineralnog azota u zemljištu u fazi svilanja i na kraju vegetacije bio je različit kod ispitivanih inbred linija kukuruza, i zavisio je od primenjenih doza azotnog đubriva. Sadržaj nitratnog azota u zemljištu u obe godine ispitivanja bio je znatno veći u odnosu na sadržaj amonijačnog azota, kod sva tri genotipa i na svim tretmanima đubrenja.
AB  - Three maize inbred lines (L1, L2 and L3) of different maturity groups (FAO 300, 500 and 700) were studied in the trial with five fertilising variants: I - control without fertilisers; II - 60 kg P2O5/K2O ha-1, 60 kg N ha-1; III - 60 kg P2O5/K2O ha-1, fertilising with nitrogen according to the N-min method (with the addition up to 120 kg ha-1); IV - 60 kg P2O5/K2O ha-1, 120 kg N ha-1; V - 60 kg P2O5/K2O ha-1, 180 kg N ha-1. The objective of the present study was to determine the dynamics of nitrate and ammonium nitrogen in the course of growing maize inbred lines on semi-gley calcareous chernozem under agroecological conditions of the Zemun field in order to optimise and rationalise the application of N-fertilisers in seed maize. Dynamics of mineral nitrogen in the soil depended on meteorological conditions prevailing during the performance of the experiment. The mineral nitrogen content in the soil varied over genotypes and applied rates of nitrogen fertilisers. The highest mineral nitrogen content in the soil (to the depth of 0-120 cm) in the silking stage in both years of investigation was determined in the soil under the inbred line L1, as well as, in the treatment with the application of 180 kg N ha-1 (V). The corresponding values at the end of the growing season were also detected in the soil under the inbred line L1. In 1998 the highest amount of mineral nitrogen in the soil was estimated in the fertilising variant III (N-min methods), while in 1999 the corresponding values were determined in the fertilising variant V (120 kg N ha-1).
PB  - Savez poljoprivrednih inženjera i tehničara, Beograd
T2  - Journal of Scientific Agricultural Research
T1  - Uticaj đubrenja na dinamiku mineralnog azota u zemljištu pri gajenju inbred linija kukuruza
T1  - Effects of fertilisers on the dynamics of mineral nitrogen in soil under maize inbred lines
EP  - 86
IS  - 1-2
SP  - 75
VL  - 63
UR  - conv_263
ER  - 

@article{
author = "Hojka, Zdravko M. and Grubišić, Mirko",
year = "2002",
abstract = "Ispitivanja su obavljena na oglednom polju Instituta za kukuruz "Zemun Polje" tokom 1998. i 1999, na zemljištu tipa semiglejno-karbonatni černozem. U ogledu su korišćene tri inbred linije kukuruza (L1, L2 i L3) različitih grupa zrenja (FAO 300, 500 i 700) i primenjeno je pet varijanti đubrenja: I - kontrola bez primene đubriva; II - 60 kg P2O5/K2O ha-1, 60 kg N ha-1; III - 60 kg P2O5/K2O ha-1, đubrenje azotom na bazi N-min metode (sa dopunom do 120 kg ha-1); IV - 60 kg P2O5/K2O ha-1, 120 kg N ha-1; V - 60 kg P2O5/K2O ha-1, 180 kg N ha-1. Dinamika mineralnog azota u zemljištu zavisila je od meteoroloških uslova u toku izvođenja eksperimenta. Sadržaj mineralnog azota u zemljištu u fazi svilanja i na kraju vegetacije bio je različit kod ispitivanih inbred linija kukuruza, i zavisio je od primenjenih doza azotnog đubriva. Sadržaj nitratnog azota u zemljištu u obe godine ispitivanja bio je znatno veći u odnosu na sadržaj amonijačnog azota, kod sva tri genotipa i na svim tretmanima đubrenja., Three maize inbred lines (L1, L2 and L3) of different maturity groups (FAO 300, 500 and 700) were studied in the trial with five fertilising variants: I - control without fertilisers; II - 60 kg P2O5/K2O ha-1, 60 kg N ha-1; III - 60 kg P2O5/K2O ha-1, fertilising with nitrogen according to the N-min method (with the addition up to 120 kg ha-1); IV - 60 kg P2O5/K2O ha-1, 120 kg N ha-1; V - 60 kg P2O5/K2O ha-1, 180 kg N ha-1. The objective of the present study was to determine the dynamics of nitrate and ammonium nitrogen in the course of growing maize inbred lines on semi-gley calcareous chernozem under agroecological conditions of the Zemun field in order to optimise and rationalise the application of N-fertilisers in seed maize. Dynamics of mineral nitrogen in the soil depended on meteorological conditions prevailing during the performance of the experiment. The mineral nitrogen content in the soil varied over genotypes and applied rates of nitrogen fertilisers. The highest mineral nitrogen content in the soil (to the depth of 0-120 cm) in the silking stage in both years of investigation was determined in the soil under the inbred line L1, as well as, in the treatment with the application of 180 kg N ha-1 (V). The corresponding values at the end of the growing season were also detected in the soil under the inbred line L1. In 1998 the highest amount of mineral nitrogen in the soil was estimated in the fertilising variant III (N-min methods), while in 1999 the corresponding values were determined in the fertilising variant V (120 kg N ha-1).",
publisher = "Savez poljoprivrednih inženjera i tehničara, Beograd",
journal = "Journal of Scientific Agricultural Research",
title = "Uticaj đubrenja na dinamiku mineralnog azota u zemljištu pri gajenju inbred linija kukuruza, Effects of fertilisers on the dynamics of mineral nitrogen in soil under maize inbred lines",
pages = "86-75",
number = "1-2",
volume = "63",
url = "conv_263"
}

Hojka, Z. M.,& Grubišić, M.. (2002). Uticaj đubrenja na dinamiku mineralnog azota u zemljištu pri gajenju inbred linija kukuruza. in Journal of Scientific Agricultural Research
Savez poljoprivrednih inženjera i tehničara, Beograd., 63(1-2), 75-86.
conv_263

Hojka ZM, Grubišić M. Uticaj đubrenja na dinamiku mineralnog azota u zemljištu pri gajenju inbred linija kukuruza. in Journal of Scientific Agricultural Research. 2002;63(1-2):75-86.
conv_263 .

Hojka, Zdravko M., Grubišić, Mirko, "Uticaj đubrenja na dinamiku mineralnog azota u zemljištu pri gajenju inbred linija kukuruza" in Journal of Scientific Agricultural Research, 63, no. 1-2 (2002):75-86,
conv_263 .