Rudakov L. Moisture content in soil and water supply for crops in the southern Steppe Zone in Ukraine

Object: time and territorial dynamic process of moisture storage under seedings; Aim: appreciation of main crops' moisture saturation on the basis of daily moisture storages in the one and a half meter soil layers and on the analysis of its influence on the harvest. Yroundwork of resource sowing of irrigation of main cgops on research territory; Metohods: analysis, mathematical and statistical. Novelry - for the tirst time discovered for the research territory empiric dependence of moisture deposit from complex range indicator of previons weather conditions under leading crops sowing; developed methodins of calculation of daily moisture deposit in 0-50 cm and 0-100 cm of soil layer; for the first time for every day of critical period the mark relating to the providing of leading crops with moisture deposit is given according to different natural moistened years. The author also suggested a Vegetation period moisture ratio, which is useful in deermining the uniformity of natural moisturing of soils andtheir characteristics. Results: for theory - methods of calculation of moisture deposit can be developed for anolher agroclimatical sones and agricultural crops; for practicl - implementation info production of proposed methods of calculation moisture deposit will promote the effective mechanesm of regulation of to create water distribution, economical using of irrigation water, for creation of automated regime management in irri gation. Field - agriculture.