DYNAMIC OF THE BASIC PHYSICAL PROPERTIES OF THE ARABLE HORIZON OF SOD-PODZOLIC ERODED SOILS ON LOESSLIKE LOAMS UNDER THEIR AGRICULTURAL USING

Abstract

The results of 20-years researches of the state of the basic agrophysical properties of the arable horizon of sod-podzolic eroded soils on loesslike loams are presented at the article. Based on the findings the average long-term average density and porosity of the studied soils and ranges of their variation are determined. The average long-term value of the density of the arable horizon of sod-podzolic soils developing on moraine loams changed from 1,20 g/cm³ to 1,43 g/cm³, depending on the degree of erosion. The density of the arable horizon of investigated soils coincided to acceptable values in 50-89 % of cases. The optimal values of porosity were identified in 49 % on non-eroded soils, and 49% critical marks - on highly eroded. The average porosity values amounted 46-53 %. The acceptable values were set at 63-90 % of all cases. The possibility of decrease to critical values is highest on the highly eroded variety (6-20 %), and improvement to optimal ones - on non-eroded (12-34 %).