Efficiency of the irrigation norm for winter wheat and soy varieties in the typical land of Uzbekistan

In this article, in the conditions of grassland soils of Andijan region, pre-irrigation varieties of winter wheat Tanya, Vershina, Kalym, Andijan-4 have a high yield when the soil moisture is irrigated in the order of 75-75-75% relative to the limit field moisture capacity. In particular, the average yield of soybeans was 66.0 quintals (q)/ha from Tanya, 69.5 q/ha from Vershina, 69.2 q/ha from Kalym and 67.2 q/ha from Andijan-4. and Oyjamol cultivars received high yields when irrigated in the order of 70-75-65% of the pre-irrigation soil moisture limit, including the average yield of 26.8 q/ha from Tomaris and 27.0 q/ha from Oyjamol. Water consumption of winter wheat and soybean varieties was determined, the minimum water consumption for the cultivation of one quintal of grain was 75.45-75% of the soil moisture before the threshold field moisture capacity, which is 58.5 m³/sec in "Kalym" variety, 59.6 m³/sec in "Andijan-4" variety, pre-irrigation soil moisture of soybeans cultivated as a secondary crop in 70-75-65% of the field moisture capacity 81.3 m³/sec in the variety "Oyjamol" and 86.4 m3/sec.