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Razvoj nauke i tehnologije ide u pravcu introdukcije novih pristupa u oplemenjivanju biljaka i različitih metoda za povećanja produktivnosti biljaka. Jedna od najnovijih metoda je implementacija ekološki prihvatljive tehnike korišćenja pulsirajućeg elektromagnetnog polja niskih frekvencija (PEMP). U radu su prikazani rezultati uticaja elektromagnetne stimulacije semena soje na masu zrna po biljci, masu 1.000 zrna i prinos zrna u različitim agroekološkim uslovima. U trogodišnjem istraživanju, u periodu od 2013. do 2015. godine, korišćena je sorta soje Valjevka, gajena pri različitim količinama đubriva (kontrola – bez đubrenja, 750 kg/ha i 1300 kg/ha). Pre setve, seme je bilo podvrgnuto stimulaciji sa PEMP u varijantama: kontrola – bez stimulacije i stimulacija naizmeničnim magnetnim poljem sa indukcijom od 30 mT i vreme ekspozicije od 15 minuta. Prosečna masa zrna po biljci pri stimulaciji semena bila je za 11,53% (12,09) viša nego bez PEMP (10,84). Masa 1.000 zrna sa PEMP je iznosila 155,99 g, što je bilo više za 2,06% u odnosu na varijantu bez PEMP (152,83 g). Prosečan prinos zrna soje za sve tri godine istraživanja sa stimulacijom semena je bio za 4,85% veći (3481,25 kg/ha) nego bez PEMP (3320,14 kg/ha). Stimulacija semena sa PEMP ima ekonomsku opravdanost, obzirom na rast cena soje na svetskoj berzi. Rezultati pokazuju da PEMP tretman semena soje može značajno uticati na prinos zrna soje i da se suprotstavi neželјenim efektima poput suše i nedostatka đubriva. The development of science and technology introduces new approaches in plant breeding and various methods to increase plant productivity. One of the latest methods is the implementation of an environmentally friendly technique of using a pulsed low-frequency electromagnetic field (PEMP). The paper presents the results of the influence of the electromagnetic stimulation of soybean seeds on grain weight per plant, weight of 1,000 grains and grain yield in different agroecological conditions. In the three-year research, in the period from 2013 to 2015, the soybean variety Valjevka was used, grown with different amounts of fertilizers (control – without fertilization, 750 kg/ha and 1300 kg/ha). Before sowing, the seed was subjected to PEMP stimulation in variants: control – without stimulation and alternating magnetic field stimulation (PEMP) with induction of 30 mT and exposure time of 15 minutes. The average grain weight per plant during seed stimulation was 11.53% (12.09) higher than without PEMP (10.84). The weight of 1,000 grains with PEMP was 155.99 g, which was 2.06% higher than the weight of 1,000 grains of the variant without PEMP (152.83 g). The average soybean grain yield for all three years of research with seed stimulation was 4.85% higher (3,481.25 kg/ha) than without PEMP (3,320.14 kg/ha). Stimulation of seeds with PEMP has economic justification given the growth of soybean prices on the world stock market. The results show that the PEMP treatment of soybean seeds can significantly affect soybean grain yield and counteract side effects such as drought and lack of fertilizers.

NPK đubriva i efektivni mikroorganizmi imaju veliki uticaj na morfološke osobine biljaka soje. U ovom radu analiziran je uticaj NPK đubriva i efektivnih mikroorganizama na masu i visinu biljaka soje. Najviše vrednosti analiziranih osobina ostvarene su na varijanti sa primenom NPK đubriva u kombinaciji sa efektivnim mikroorganizmima, dok je pojedinačni uticaj NPK đubriva i efektivnih mikroorganizama slabije izražen. NPK fertilizer and effective micro-organisms have a strong influence on morphological characteristics of soybean plants. In this paper, the influence of NPK fertilizers and effective microorganisms on the weight and height of soybean plants is analyzed. The highest values of the analyzed properties were achieved in the variant with the application of NPK fertilizers in combination with effective organisms, while the individual influence of NPK fertilizers and effective microorganisms was less pronounced.

Many studies show that in the last 20 years, the increase in production per hectare has been achieved mainly due to the creation of new varieties and the development of plant breeding. Innovations in plant breeding are the main way to find new traits, values and tolerances, which are the only ones that can respond to the increased demand for yield and more efficient production. In addition to high and stable yields, it is very important that the soybean seed has a satisfactory technological quality. Therefore, the aim of this study was to examine how the application of pulsed electromagnetic fields (PEMFs) affected the protein yield of soybean seed depending on the year, exposure time and frequency. The field trials were conducted in the experimental field of the Institute of Field and Vegetable Crops in Novi Sad, Serbia in 2010-2013. For this research, the seeds of a medium-sized variety Valjevka exposed to a pulsed electromagnetic field (PEMF) using a pulse generator and a strip applicator were used. A low frequency pulsed electromagnetic field (16, 24, 30, 72 Hz) was used at the exposure times of 0, 30, 60, and 90 minutes. The results of the research show that the application of this method can increase the yield of protein in soybean seed for more than 20%, which is a significant increase, especially in organic production, where the use of seed treatment agents is very restricted. However, this measure can also have an inhibitory effect if an adverse combination of exposure time and frequency strength is selected. Mnoga istraživanja pokazuju da se u poslednjih 20 godina povećanje proizvodnje po hektaru ostvaruje uglavnom zahvaljujući stvaranju novih sorti i razvoju oplemenjivanja biljaka. Inovacije u oplemenjivanju biljaka su glavni put za iznalaženje novih osobina, vrednosti i tolerantnosti, koje jedine mogu da odgovore povećanom zahtevu za prinosom i efikasnijom proizvodnjom. Osim visokih i stabilnih prinosa, veoma je važno da seme soje poseduje i zadovoljavajući tehnološki kvalitet. Zbog toga je cilj ovog istraživanja bio da se ispita kako primena pulsirajućeg elektromagnetnog polja (PEMP) deluje na sadržaj proteina u semenu soje u zavisnosti od godine, vremena trajanja ekspozicije i jačine frekvencije. Poljski ogled je izveden na eksperimentalnom polju Instituta za ratarstvo i povrtarstvo u Novom Sadu u periodu od 2010. do 2013. godine. Za ovo istraživanje korišćeno je seme srednjerane sorte Valjevka koje je izlagano pulsirajućem elektromagnetnom polju (PEMP) pomoću generatora impulsa i trakastog aplikatora. Korišćeno je pulsirajuće elektromagnetno polje niskih frekvencija (16, 24, 30, 72 Hz) u vremenu ekspozicije od 0, 30, 60 i 90 minuta. Rezultati istraživanja pokazuju da primena ove metode može povećati prinos proteina u semenu soje do 20%, što predstavlja značajno povećanje i dobru osnovu da se ova mera počne koristiti, pre svega u organskoj proizvodnji, gde je primena sredstava za tretiranje semena veoma ograničena međutim, ova mera može imati i inhibitorni efekat ako se izabere nepovoljna kombinacija vremena ekspozicije i jačine frekvencije.

The objective of this study was to examine the effect of primers on seed quality parameters using different starting values of germination. For this purpose, ten soybean lines selected at the Institute of Field and Vegetable Crops, Novi Sad were evaluated. The starting values of germination ranged between 48% and 89%. Seeds were surface sterilized with 3% sodium hypochlorite and immersed in different primers: 1% potassium nitrate, 1% potassium chloride and 1% hydrogen peroxide. Untreated seeds were used as the control. The obtained results revealed that the effects of priming depended on soybean line and treatment, whereas the efficiency of this pre-sowing treatment was not affected by the starting value of seed germination. Some lines responded favorably to immersion, while in others priming had an inhibitory effect, causing a significant decrease in germination. There was an increase in germination up to 12% or a decrease up to 11%, depending on line and treatment. Lines that were positively affected by this method also exhibited increased values for other germination parameters: mean germination time (MGT) and time to 50% germination (T50). Lower values of MGT and T50 were observed in lines which showed a negative response to priming and a decrease in germination, but also a more rapid radicle protrusion, as compared to the control. In conclusion, there is no universal applicability of one single primer as it might cause a negative response in some lines and thus reduce seed quality.

The aim of the research was to test the effect of pulsed electromagnetic field (PEMF) on soybean seed germination and yield depending on specific field conditions, years of study, exposure duration and frequency. Field trial was conducted on an experimental field of Institute of Field and Vegetable Crops in Novi Sad, Serbia in 2010-2013. Seeds of the soybean (Glycine hispida (Moench)) medium-early cultivar. Valjevka 'were exposed to the PEMF therapy using the impulse generator and strip. Low-frequency (16, 24, 30 and 72 Hz) PEMF was used in the duration of 0, 30, 60 and 90 minutes. Research results indicate that this method can increase seed germination up to 8.00% and yield by 960.5 kg, or 21% in field conditions, which is a significant increase and a solid basis to introduce this practice, primarily in organic production with a very limited use of seed treatment preparations. However, the practice can have an inhibitory effect under an unfavourable combination of exposure duration and frequency. The obtained data were processed using the analysis of variance of three-factorial trials considering all years of study. Due to different meteorological conditions in the study years, analysis of variance was conducted for each year of study and correlations between the tested traits were examined.

Soybean yield depends on the choice of cultivar, soil fertility, cultivation practices, and weather conditions in different years. Ploughing down crop residues increases the content of soil organic matter, and thereby positively affects soil fertility. The use of crop residues as an energy source has been promoted in recent years. It would be wrong to refer to this as a renewable energy source as the removal of crop residues from agricultural fields reduces and ultimately damages soil fertility, which in turn leads to reduced yield and a crop residue decrease in the future. Due to the reduced application of manure and organic fertilisers, it is necessary to return crop residues to the soil to preserve soil structure and prevent soil fertility decline. The effect of ploughing down crop residues of preceding crops on soybean yield has been the focus of studies for eleven years. Ploughing down maize crop residues resulted in the soybean yield increase by about 11.69%, i.e. the annual yield increase ranged from 2.89% to 15.94%. Prinos soje zavisi od izbora sorte, plodnosti zemljišta, agrotehničkih mera, kao i od vremenskih uslova u pojedinim godinama. Zaoravanjem žetvenih ostataka preduseva povećava se sadržaj organske materije u zemljištu, što ima pozitivan uticaj na plodnost zemljišta. U jedanaestogodišnjim istraživanjima proučavan je uticaj zaoravanja žetvenih ostataka preduseva kukuruza na prinos soje. Poslednjih nekoliko godina sve više se promoviše korišćenje žetvenih ostataka za dobijanje energije. Pogrešno je nazivati ovaj vid dobijene energije kao obnovljivu energiju, pošto se na duži period odnošenjem žetvenih ostataka sa poljoprivrednih površina pogoršava i trajno narušava plodnost zemljišta, što će dovesti u budućnosti do smanjenja prinosa gajenih biljaka, a samim tim i do smanjenja žetvenih ostataka. Zbog sve manje primene stajnjaka i organskih đubriva, neophodno je bar deo žetvenih ostataka gajenih biljaka vratiti u zemljište, kako bi se sačuvala struktura zemljišta i usporilo opadanje njegove plodnosti. Zaoravanje žetvenih ostataka preduseva kukuruza dovelo je do povećanja prinosa soje u proseku za 11,69%, odnosno po pojedinim godinama povećanje prinosa je bilo od 2,89% do 15,94%.

The aim of this paper was to examine the possibility of gentian generative propagation, because the production of high-quality planting material is very important not only for the beginning of revitalization of this plant species in their natural habitat but also for its large-scale production in Montenegro. Cultivation of gentian, as well as other medicinal plants, represents a safe way for their protection and conservation in the wild. For the purpose of choosing the best population, seed samples from 9 natural habitats were collected in the mountains of the northern part of Montenegro. The field trial in which dynamics of gentian seedlings growth was monitored in the first and the second year of vegetation was set up by sowing of seeds collected in natural conditions at the locality Korita.

Coccidiosis is a common parasitic disease of broiler chickens caused by single-celled protozoan parasites of the genus Eimeria which are commonly referred to as coccidian. This is an infective disease of the digestive tract which is most frequent with poultry, causing a decrease in daily increment, prolonged fattening, poorer skin pigmentation, slower feed conversion and increased mortality. The disease is caused by Protozoas from the genera of Eimeria, Isospora and Cryptospora, and it is manifested by damaging the intestine epithelial cells, less frequently the bile duct and renal tubuli. Coccidiosis is traditionally controlled by chemotherapy. There are many anticoccidial preparations which are used in the prevention of coccidiosis. We are chose a polyether monocarboxylic acid - salinomycine. Salinomycin is monovalent carboxyl-polyether ionophores. Salinomycin, produced by Streptomyces albus, destroys the cell membranes and causes their lysis. Salinomycin and other ionophoric antibiotics combine with a number of mono and divalent cations and in the form of bi-complexes make it possible to transfer metal ions through lipid hydrophobic membrane, and when they are added to diet, they change bioavailability, gut uptake and absorption and reserves of nutrient tissues. In this paper has been developed and validated process of Liquid chromatography determination of ionophoric coccidiostat salinomycin with UV spectrophotometric detection and post-column derivatisation with dimethylaminobenzaldehyde (DMAB). The method is based on extraction of salinomycin in animal feed samples using mixture acetonitrile-water (80:20, v/v) and purification of extracts obtained by the filter 0,2 μm Acrodisc® PSF. The relative standard deviation (RSD) for reproducibility and accuracy varied from 2,4 to 8,8% and from 2,6% to 8,8%, respectively and the values for the relative recovery rate ranged from 89 to 98%. The limit of detection (LOD) and limit of quantification (LOQ) were estimated to be below 47 μg/kg and 71 μg/kg, respectively. Based on this results, it is concluded that the described method is accurate, precise, selective and reproducible and can be applied for determination of salinomycine in feeds and premixes for poultry.

This report describes the effects of therapeutic doses of coccidiocid sulphachloropyrazine on enzymatic and non-enzymatic antioxidative systems in haemolysed blood and liver homogenate from broilers (glutathione, glutathione-reductase, glutathione-peroxidase, peroxidase, superoxidedismutase, xantine-oxidase and lipid peroxidation). The in vivo investigation was carried out on 120 heavy-line broilers (Arbor acres) of both sexes. One-day-old broilers were randomly distributed into 2 groups, each numbering 60 individuals of both sexes: Group 1 - control group; Group 2 - group of broilers inoculated with laboratory derived coccidia species on the 21st day-ofage. When symptoms of coccidiosis appeared (30 th day-of-age), blood sampling and decapitation of 20 chickens were carried out (Group 2a). The remaining broilers were treated with therapeutic doses of sulphachloropyrazine (60 ppm). Decapitation of 20 chickens was carried out after the therapy was concluded (38th day-of-age – Group 2b). Infection of broilers with coccidia intensified free radical processing in haemolysed blood and liver homogenate. This was evident from the increased levels of lipid peroxidation and the catalytic activity of almost all examined enzymes (SOD, GSHPx and Px). Therapeutic doses of sulphachloropyrazine inhibited free-radical activity induced by disease and establishing of physiological values of lipid peroxidation and catalase activity of examined enzymes. Coccidiocid, Eimeria, enzymatic, non-enzymatic antioxidative systems, therapy Coccidiosis is an infectious disease of the digestive tract which is most frequent in poultry, causing prolonged fattening, slower feed conversion and increased mortality (Jenkins et al. 2008). The disease is caused by protozoas from the genera of Eimeria, Isospora and Cryptospora, and it is manifested by damage of the intestinal epithelial cells, less frequently the bile duct and renal tubuli (Perry and Long 1987). If coccidiosis is manifested in its clinical form, the sulphonamide-based derivatives, i.e. the derivatives of p-aminobenzolsulphonic acid are used for treatment (Arakawa et al. 1991; Katzung 1995). Sulphachloropyrazine-4-amino-N(choropyrazinyl)-monosodium monohydrate (active substance of the drug “Esb 3 30%”) is a sulphonamide of a wide spectrum of action, (Bevill 1988). For the diagnostics of blood and organ diseases, catalytic activity of enzymes in erythrocytes and liver is most commonly monitored. Erythrocytes are directly exposed to molecular oxygen; their plasma membrane has high concentrations of polyunsaturated fatty acids and an anionic channel specific for single oxygen. Furthermore, erythrocytes contain a high concentration of haemoglobin that is exposed to antioxidation. Erythrocytes have a highly effective system of protection from free radicals: they contain all the enzymes of antioxidative protection and a high level of glutathion (Jovanovic 1993). The liver is an organ with a central metabolic role in the organism, often referred to as “the main laboratory” since it performs major detoxification functions. For this reason the liver is the prime target for the study of the metabolism of xenobiotics (Popovic 1988). Antioxidant enzymes counteract exessive formation and harmful effects of reactive oxygen

Examination of the impact of electromagnetic fields on function of biological systems is more recent direction in agriculture. Application of electromagnetic waves on seed activates the enzyme complex which results in better germination and growing. The aim of this study was to investigate the use of different groups of microorganisms and low-frequency electromagnetic waves to achieve high yields. The study was conducted at the experimental field of the Institute of Field and Vegetable Crops in Novi Sad. Valjevka soybean variety was used. Necessary nutrients were provided by use of poultry manure in amount of: control, 750 and 1300 kg.ha-1 and incorporated mixture of useful microorganisms. Sub-plots include treatment of seeds with electromagnetic waves (15 Hz frequencies of exposure for 30 minutes) and the foliar treatment of plants with mixture of beneficial microorganisms in two growth stages of development. In the stage of development R3 were defined the basic parameters of the biological value of the soil, and achieved a high yield in the harvest. The results showed significant increase of soybean yield (21.4%) in the version with electromagnetic waves. The highest yield of 3179 kg.ha-1 was achieved in fertilization with 750 kg.ha-1 and use of electromagnetic waves, which was also in 4.44%, or 124 kg.ha-1 higher yield compared to the version without radiation. The results of investigated biogeny parameters of soil were compatible with soybean yield.

Recently, heavy metals concentrations increased in some agricultural areas due to the consequences of anthropogenic impacts. The aim of this study was to determine the level of heavy metals (As, Cr, Ni and Pb) in Medicago sativa L. and Trifolium pratense L. grown on fluvisol, in order to obtain information on safety of these nutrients. The total content of Pb, As, Cr and Ni in the samples of fluvisol was above the maximum allowable amount. The content of heavy metals in Medicago sativa L. and Trifolium pratense L. was below the critical and toxic concentrations in all samples originating from contaminated soil. It was concluded that the accumulation of heavy metals in plants did not depend only on the total content in soil, but also the affinity of the plant, and individual and interactive effects of various soil properties. No statistically significant differences in the accumulation of heavy metals between Medicago sativa L. and Trifolium pratense L were observed. It is necessary to further control of heavy metals in the investigated area, in order to prevent their entry into the food chain and provide healthy food. U poslednje vreme povećana je koncentracija teških metala na nekim poljoprivrednim površinama usled antropogenog uticaja. Cilj rada je bio da se utvrdi nivo teških metala (As, Cr, Ni i Pb) u nekarbonatnom aluvijalnom (fluvijanom) zemljištu, te njihova akumulacija u Medicago sativa L. i Trifolium pratense L., radi dobijanja informacije o zdravstvenoj ispravnostinosti ovih hraniva. Ukupan sadržaj ispitivanih teških metala u uzorcima zemljišta bio je iznad maksimalno dozvoljene količine, što znači da svi uzorci analiziranih lokaliteta pripadaju kategoriji kontaminiranog zemljišta. Sadržaj teških metala u Medicago sativa L. i Trifolium pratense L. bio je ispod kritičnih i toksičnih koncentracija, kao i maksimalno dozvoljenih količina u hrani za životinje u svim uzorcima poreklom sa kontaminiranog zemljišta. Konstatovano je da akumulacija teških metala u biljkama nije zavisila samo od ukupnog sadržaja u zemljištu, nego i afiniteta biljke, te individualnog ili interaktivnog dejstva raznih zemljišnih svojstava. Nije bilo značajnih razlika u akumulaciji teških metala izmeću Medicago sativa L. i Trifolium pratense L.

Soya bean has a great importance in the organic production due to its ability to coexist with nitrogen-fixing bacteria of the genus Bradyrhizobium. The soya bean seed inoculated with the symbiotic nitrogen-fixing bacteria Bradyrhizobium japonicum and with a mixture of nitrogen-fixing bacteria was observed in this study. The following highly efficient strains of free nitrogen-fixing bacteria were in the liquid inoculum:Azotobacter chroococcum, Azospirillum lipoferum, Beijerinckia Derx and Klebsiella planticola. Beside bacterization, different rates of pure nitrogen per hectare were applied (0, 40, 60, 80 kg N/ha). The effect of nitrogen-fixing bacteria at different levels of mineral nitrogen on the abundance of those groups of soil microorganisms and on the amounts of (NO3+NH4)- N/ha at the end of the growing season was determined. Three-year bacterization resulted in the significant increase of the observed parameters. The highest values when inoculation was done with mixed nitrogen-fixing bacteria were obtained with the application of 40 kg N/ha. The application of both types of nitrogen-fixing bacteria in the soya bean production is a very beneficial activity from ecological and economical aspects. Therefore, this measure should be accepted, especially in relation to soils contaminated with excess use of mineral nitrogen fertilisers. Key words: Fertilising, nitrate and ammonium nitrogen, nitrogen-fixing bacteria, soya bean.

Inoculation is the best way to ensure good nodulation with the proper strain of nitrogen-fixing bacteria for increased yield in an environmentally safe manner. This investigation was conducted on three-year experiment which was set up in four replications with three-crop rotation (maize-soybean-wheat) at experimental field of the Institute of Field and Vegetable Crops, Novi Sad, Serbia. Effects of application of microbiological fertilizer (with nitrogen-fixing bacteria Bradyrhizobium japonicum) on root mass, number and mass of nodes per plant, soil biogeneity (number of ammonifiers, Azotobacter, actinomycetes), as well as the effect on soybean yield were studied. Obtained results indicated positive impact of inoculation on nitrogen fixation parameters. The higher amounts of mineral nitrogen had negative impact on atmospheric nitrogen fixation, i.e. by increasing preplanting mineral nitrogen amount in the soil by 1 kg, the amount of calculated nitrogen from the air was decreased by 1.72 kg. Increasing abundance of studied microorganisms in the rhizosphere, as well as soybean yield using microbiological fertilizer was stimulated by plowing under crop residues. The impact of meteorogical conditions on the effects of inoclutaion was very significant. Key words: Inoculation, fertilizing, nitrogen fixation, soybean, microorganisms, yield.

During the two-year study on the influence of presowing fertilization on growth and development of garden pea (Pisum sativum L.) in three different experimental setups, five genotypes of peas were used, two of Dutch origin and three that were created at the Institute of Field and Vegetable Crops. The aim of the study was to determine the extent to which different genotypes and complex NPK fertilizer influence the yield per plant. The average yield per plant for both years was 16.86 g. The influence of genotype on grain yield per plant was statistically significant (p lt 0.01). Tamish cultivar showed significantly lower yields during both study years, in comparison with other genotypes tested, except when compared with the Danube cultivar in year 2007. There was no regularity in the influence of pre-sowing fertilization on grain yield per plant. Regression analysis of the pea genotypes, revealed a slight reduction in yield per plant as a function of increased use of complex fertilizer. Grain yield per plant was in high positive correlation (p lt 0.01) with yield components, and with the length of the stem. The number of pods was in strong correlation with grain numbers and weight of pods. Number of grains and the absolute weight were in highly statistically significant correlation with the mass of pods. U dvogodišnjem istraživanju ispitivan je uticaj predsetvenog đubrenja u tri različite varijante na rast i razviće kod baštenskog graška (Pisum sativum L.). U radu je korišćeno 5 genotipova graška, od kojih su 3 stvorena na Institutu za ratarstvo i povrtarstvo u Novom Sadu, a 2 su holandskog porekla. Cilj je bio da se ustanovi u kojoj meri različiti genotipovi i kompleksno đubrivo NPK utiče na prinos po biljci kod konzumnog graška. Prosečan prinos po biljci za obe istraživane godine iznosio je 16.86 g. Uticaj genotipa graška na prinos zrna po biljci bio je na nivou statističke značajnosti (p lt 0.01). Sorta Tamish imala je vrlo značajno manji prinos u obe istraživačke godine u poređenju sa ostalim ispitivanim genotipovima, izuzev u odnosu na sortu Danube u 2007. godini. Nije zabeležena pravilnost kod uticaja predsetvenog đubrenja graška na prinos zrna po biljci. Regresiona analiza kod ispitivanih genotipova graška pokazala je da sa povećanjem primenjenog komplesnog đubriva dolazi do neznatnog smanjenja prinosa po biljci. Prinos zrna po biljci bio je u visoko pozitivnoj korelaciji (p lt 0.01) sa komponentama prinosa, kao i sa dužinom stabljike. Broj mahuna je u jakoj korelaciji sa brojem zrna i masom mahuna. Broj zrna i apsolutna masa su u visoko statistički značajnoj korelaciji sa masom mahuna.

Effect of environmental conditions (temperatures and precipitation) on soybean yield and seed quality was examined during two years. Trials with four replications were located at experimental fields of Institute of Field and Vegetable Crops at Rimski Šančevi. Environmental conditions had significant influence on examined traits, and higher yield and seed quality was achieved during beneficial year. There was a moderate positive relationship between yield and seed germination. U dvogodišnjem istraživanju ispitivan je uticaj agrometeoroloških činilaca (temperatura i padavina) na prinos i semenske kvalitete zrna soje. Ogled je postavljen u četiri ponavljanja na oglednim parcelama Instituta za ratarstvo i povrtarstvo na Rimskim Šančevima u 2009. i 2010. Vremenski uslovi značajno su uticali na ispitivana svojstva, odnosno u godini sa povoljnim meteorološkim uslovima (2010) ostvaren je veći prinos i kvalitet semena ispitivanih sorti soje. Uočena je umerena pozitivna korelacija između prinosa i klijavosti semena.

Dvogodišnje istraživanje je sprovedeno u uslovima organske i konvencionalne tehnologije gajenja na karbonatnom černozemu posle pšenice kao preduseva. Faktori ispitivanja bili su tri sorte soje različite grupe zrenja koje su sejane na tri različite gustine setve što je predstavljalo drugi faktor ispitivanja. Podaci su obrađeni analizom varijanse po metodi dvofaktorijalnog split – plot ogleda, gde su faktori ispitivanja: sorta i gustina setve, a razlike između tretmana testirane su LSD-testom. Cilj ovog rada bio je da se utvrdi prinos i sadržaj ulja u zrnu soje u zavisnosti od genotipa i gustine setve kod organskog i konvencionalnog načina gajenja. Prosečan prinos u konvencionalnoj tehnologiji proizvodnje iznosio je 4,84 t ha-1 i bio je veći u poređenju sa ekološkim načinom proizvodnje gde je zabeležen prinos od 4,68 t ha-1. Utvrđen je veći procenat ulja u ekološkoj proizvodnji (21,88 %) u odnosu na konvencionalnu proizvodnju (21,68 %).