Efficiency of Biopreparation Application in Soya Cultivation on Common Chernozem Soil

Sustainable development of agricultural systems can be ensured by stable and guaranteed yields of agricultural crops. The aim of the research was to select biopreparations influencing the processes of symbiosis in crops for stable production of soybean seeds. The object of the research was medium-ripening soybean variety Duniza. We studied biopreparations containing bacteria of the genus Rhizobium of different preparative forms - dry on the basis of peat: Nitrofix P, Rhizotorfin 634a (dry form), and liquid: Nitrofix Zh, Rhizotorfin 634b (liquid form) and adhesive Adjugrain, which includes polysaccharides of natural origin and the system of their application. On average for three years, the crude mass of active nodules - 25.7 g/m2, as well as the active symbiotic potential of soybean were the greatest when combining the preparation Rhizotorfin, strain 626a with film-forming Adjugrain, ASP was - 8226 kg × day/ha. Economic efficiency in the form of cash proceeds from the application of this agro-approach was the maximum, with a yield of 2.23 tonnes/ha, cost of production - 12282 rub/t and seed production costs - 24318 rub/ha was 25182 rub/ha.