Postharvest crop residues are an important source of nutrient inputs in the soil because of the limited application of organic fertilizers in modern agricultural systems. The article presents the results of experimental research on the substantiation of optimal parameters of methods and depth of basic tillage of dark chestnut soil for growing agricultural crops under different systems of cultivation and fertilization in an irrigated row crop rotation. The objective of the study was to determine the humus status, soil nutrient regime and productivity of agricultural crops under different rates of mineral fertilizers against the background of the burial of leaves, stems and roots of agricultural crops using implements with a different design of the working parts. The research was carried out in the area of the Ingulets irrigation system in 2010-2018 as part of the stationary experiment of the irrigated agriculture department of the Institute of Irrigated Agriculture of the National Academy of Agrarian Sciences of Ukraine. The research findings prove the expediency of applying the organo-mineral system of fertilization with the use of postharvest residues of grain corn, soybeans, winter wheat, grain sorghum as a fertilizer, combined with mineral fertilizers at a rate of N120P60 at the background of a multi-depth system of basic tillage with plowing up and differentiated (option 1) cultivation with one soil slitting per rotation, which creates favorable nutrient and water regimes in the soil and promotes the formation of crop rotation productivity at a level of 8.17 - 8.43 tons / ha of grain
crop rotation, method, system, soil tillage, humus, corn, sorghum, soybeans, winter wheat
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