EFFECT OF NORMAL BENTONITE CLAY, MINERAL FERTILIZERS, AND IRRIGATION REGIME ON WINTER WHEAT

In addition to the norm N150P105K75 kg/ha of mineral fertilizers for winter wheat under conditions of typical gray soils of the Tashkent region, 3000 kg/ha of bentonite clay was applied for plowing, with soil moisture before irrigation during the growing season in the irrigation mode 60-70-60 and 70-80- 70% of the LFMC at the end of the growing season, the bulk density of the soil relative to the control variant decreased to 0,03-0,05 g/cm3 in the 0-30 cm. layer and to 0,07-0,11 g/cm3 in the 30-50 layer see, an increase in soil water permeability from 30 m3 to 100 m3/ha was noted. When irrigating under irrigation regimes of 60–70–60 and 70–80–70% of the LFMC and additional application of bentonite clay at a rate of 3000 kg/ha against the background of mineral fertilizers at a rate of N150P105K75 kg/ha, the increase in grain yield was 11,9–13,4 c/ha, and the level of profitability increased by 18,9–21,1% compared to the control.