CHOOSING AN IRRIGATION REGIME FOR SOYBEANS THAT ENSURES STABLE YIELDS IN THE DRY-STEPPE VOLGA REGION

The article considers the results of research on the soybean irrigation regime in conditions of water scarcity. Irrigation norms of soybeans have been developed taking into account plant transpiration, evaporation from the soil surface, the amount of effective precipitation, recharge from groundwater, surface discharge, evaporation in the rain cloud zone, the volume of water necessary to create an optimal irrigation regime. The application of the developed norms and terms of irrigation will ensure the yield of soybean grain of 3.5 t / ha 2–3 times higher than from rain-fed lands.