On transformation of drip soil moisture contour in after-irrigation period

Purpose: to determine special features of changes in the geometric and moisture parameters soil drip contours after irrigation. Materials methods. The basis for generalizations on dynamics transformation was results field studies conducted three experimental plots, top which is represented by medium-thick southern chernozem, characterized content physical clay Wг equal 45.0; 52.5 70.2 % dry weight. Measurements contour were carried out 0, 12, 24, 36, 48, 72 96 hours completion irrigation during post-irrigation period. Results discussion. An analysis shape dimensions internal isopleths, recorded periods different duration, made it possible qualitative their change over time. increase linear, areal volumetric a certain time period, stabilization subsequent decrease, up complete drawdown, has been defined. Of all variety factors influencing process transformation, conditions determined granulometry are considered as main ones. empirical dependence that describes functional relationship between linear contours, moistened profile, duration period obtained. Conclusions. Based study data, qualitative-quantitative typical chernozems light clay, medium heavy loam, determined. predicted compared with known allowing make conclusion about acceptability practical application development regimes agricultural lands.