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The purpose of the research was to establish the most rational soil cultivation system for irrigated conditions, contributing to the preservation of ecological balance and increasing the profitability of pepper production. Experimental studies were carried out on meadow-chestnut soils of the plain zone of the Republic of Dagestan in 2017-2019. in a two-factor experiment to determine the most effective combination of soil cultivation and irrigation regime. The paper presents the results of the influence of plowing and disc cultivation on the water-physical properties of the soil and its biological activity, as well as on the yield of sweet pepper under drip irrigation. The results of three-year research have established that, under irrigation conditions, the most effective method of basic soil cultivation is moldboard soil cultivation to a depth of 0.23 ... 0.25 m, which contributed to the improvement of soil density, its permeability, structural state and increased biological activity in the treated layer. On plowing, the yield of sweet pepper fruits was obtained at the level of 6.23 t/ha. The use of disc processing by 0.10 ... 0.12 m leads to a deterioration of agrophysical indicators of fertility, phytosanitary state of irrigated fields by 1.7 ... 2.2 times, a decrease in yield by 5.1 ... 9.6% and profitability of pepper fruit production by 25.3 ... 31.0%.

Influence of basic treatment of irrigated land on Fertility indicators and harvest formation of sweet pepper