Ecological characteristics agrophysical soil aggregates under grass natural and agricultural ecosystems

Comprehensive study of the properties of structural units of different sizes showed that the soil under the grass of natural communities are characterized by high soil structure having good water resistance, which reduces the gradient along the north-south from the leached chernozems to ordinary and south. With the decrease in the value of units increases their water resistance, which is associated with a gradual increase in their natural content of total humus. Reducing the size of the soil structure is accompanied by an increase in content of physical clay (