Abstract
The soil structure is formed by a set of soil aggre� gates, within which soil particles (grains of quartz, feldspar, etc.) are covered and bound with one another by soil gels that work as a glue. The size of the aggre� gates is considered to be the criterion of genetic fea� tures of both the whole soils and its separate horizons. The most optimal for plant development is the struc� ture that consists of 0.25–10 mm aggregates [1]. One of the important properties of soil structure is its water stability. Disorganization of the natural soil structure during plowing is a typical consequence of its anthropogenic degradation and primarily occurs as the loss of water resistance of aggregates [2–5]. Consequently, soils get denser and the disturbance of the water–air regime of the plant root system takes place. In structureless soils, air deficiency occurs after moistening followed by water deficiency. Introduction of fertilizers into the soils with broken structure appears to be ineffective and does increase the productivity.
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