The Role of Grain and Legume Crops in Increasing Soil Fertility in the Republic of Karakalpakstan

The article was scientifically analyzed a large number of nutrients in the treated layers of soil (0-30 cm) at maturity effect of soy, according to the study systems of cotton and soybean in rotation of crops on the territory of the Aral sea in the Republic of Karakalpakstan. The increase in the amount of humus by 0.002 %, -NH4 by 0.7 mg/kg and N-NO by 0.3 mg/kg at the end of the season relative to the primary agrochemical indicators of soils was scientifically justified.