OPTIMIZATION OF AGROTECHNOLOGICAL CONDITIONS FOR GROWING SOYBEANS ON CHERNOZEM SOILS: IMPACT ON YIELD AND SEED QUALITY

The article presents the results of studies of the effect of mineral fertilizers on the agrocenosis of early-maturing low-growing determinant soybeans of the Unica variety grown on leached low-humus super-powerful light clay chernozem formed on loess-like heavy loams. The research was conducted in 2023-2024 in a stationary experiment of the Department of Agrochemistry of the Kuban Experimental Farm in the Central Agro-climatic Zone of the Krasnodar Territory. The field experiment scheme included the following variants: N0P0K0, N20P40K20, N40P80K40, N60P120K60, N0P0K0 +AgroMix T, N20P40K20+AgroMix T, N40P80K40+AgroMix T, N60P120K60+AgroMix T. The objects of the study were: soil - chernozem and plants - soybeans. The soil of the experimental site was leached chernozem, low-humus, super-powerful, light clay on heavy loam forests. The 0-20 cm thick soil layer contained 3.0% humus, 15.3 mg/kg of available phosphorus and potassium, and 269.5 mg/kg of soil (State Standard 26205-91 as amended by T