Abstract

The differential water capacity of the main zonal soils of European Russia and Georgia is determined for the first time. This parameter in the A horizon of these soils rises in the sequence soddy-podzolic soil–gray forest soil–brown semidesert soil–chernozem–light chestnut soil–solonchak–krasnozem within the range of hygroscopic moisture and at equal total potential (or tension) of soil moisture. This is related to a rise in the content of physical clay, humus, or water-soluble salts in the soils. Close correlations are revealed between the logarithm of the absolute value of the total moisture potential (tension) and soil moisture content; between the parameters of this correlation and the specific soil surface; and between the specific soil surface and the content of physical clay in the soil.

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