HUMIDITY RANGES OF ARABLE HORIZON OF SOD-PODZOLIC SOILS WITH DIFFERENT ERODIBILITY DEGREE OF BELARUS (According to data of 10-year study at the experimental stations)

Abstract

The results of studies of humidity over a 10-year period at the experimental stations «Runoff Plots» and «Braslav» are shown at the article. According to data of 10-year study, average moisture content of the arable horizon of sod-podzolic soils with different erodibility degree formed on loess and moraine loams, as well as ranges of their deviations were determined. In the spring period humidity of arable layer of sod-podzolic soils on loess loams was 20-30% (level FC) in more than 70% of the cases, and during the harvest the most probable values are of 15-20%, which corresponds to the humidity rupture of capillaries (HRC). At the beginning of the growing season arable layer moisture of sod-podzolic soils on moraine loam was below field capacity (15-20%) in 50-70% of cases, and at the end of the growing season it was at the level of HRC (10-15%) in 43-71% of cases.