DYNAMICS OF THE BASIC PHYSICAL PROPERTIES OF THE ARABLE HORIZON OF SOD-PODZOLIC ERODED SOILS ON MORAINE LOAMS UNDER THEIR AGRICULTURAL USE

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 moraine 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 1.41 g/cm³ to 1.62 g/cm³, depending on the degree of erosion. The density of the arable horizon of medium- and non-eroded soils coincided to acceptable values in 45-72 % of cases, highly eroded - to the critical values in 57-78 %. The average porosity sizes of the investigated soils were 40-46 %. The acceptable values were set at 63-90 % of all cases. Decrease to critical values are most typical for the highly eroded variety (15-33 %), and improvements to optimal ones for non-eroded varieties (3-33 %).