CHANGES IN PHYSICAL AND CHEMICAL PROPERTIES AND HUMUS CONTENT OF TYPICAL BLACK SOIL IN TREATMENT AND FERTILIZER SYSTEMS

The article presents the results of studies on the effectiveness of various systems of basic soil cultivation and fertilizer systems for growing winter wheat, and their impact on the physicochemical properties of typical black soil and organic matter content. The experiment included plough tillage, tillage with a 10-12 cm disc harrow, 'No-till' technology, and a mineral fertilizer system - source-saving minimized and intensive. The study was conducted in the agrocenosis of winter wheat. The results showed that shallow tillage with a disc harrow and resource-saving minimized mineral fertilizer increased the humus content in the 0-15 cm layer by 0.04% and in the 15-30 cm layer by 0.03% compared to inversion tillage. High rates of hydrolytic acidity (1.61-2.92 mol/m3/100 g of soil) were noted at all doses of mineral fertilizer when using inversion tillage. More optimized indicators of the sum of exchangeable bases of typical chernozem in a layer of 15-30 cm were noted during inversion tillage - 28.0 mol/m3/100 g of soil. The lowest value of the sum of exchangeable bases in the 15-30 cm layer was noted using the No-till technology - 27.6 mol/m3/100 g of soil. High rates of hydrolytic acidity (1.61-2.92 mol/m3/100 g of soil) were observed at all doses of mineral fertilizer using surface tillage. More optimized indicators of the sum of exchangeable alkaline of typical black soil in a layer of 15-30 cm were noted during shelf tillage - 28.0 mol/m3/100 g of soil. The lowest value of the sum of exchangeable alkalines in the soil layer of 15-30 cm according to the No-till technology was 27.6 mol/m3/100 g of soil.