STUDY OF NATURAL WATER SUPPLY OF AGRICULTURAL CROPS IN FOREST-STEPPE AND STEPPE ZONES

N. A. Shumova

The approach proposed for estimation of the water supply of agricultural plants is based on the ratio of the water amount extracted by plants under concrete conditions of growth and development (transpiration) to the moisture amount necessary for plants to create a high yield (potential transpiration). Estimates of spatial, inter- and intra-annual water supply variability of the spring wheat crop in basic agricultural zones are given. Dependence of the spring wheat yield on water supply is presented.