Abstract
The water retention capacity of soils characterizes a quasiequilibrium between the forces retaining and removing the soil water. It has been studied under field and laboratory conditions. It is shown that the gravity factor, as well as the soil particle-size distribution and structure, has an important role in determining the soil water capacity after the outflow of gravitational water. Our study enlarges the traditional notion about the nature of the field water capacity and capillary water capacity. Physically substantiated methods for determining these constants from the soil water retention curves are suggested. The assessment of the amount of perched water in the layers with broken capillary systems, such as in the layered soils and in the artificial soil-like bodies created upon the construction of soil drainage systems, is of particular importance. Regularities of the water retention capacity in such layered soils of different textures with inclusions of gravelly and peat layers have been analyzed. It is shown that the creation of layered soils with gravelly and peat layers may be an efficient method to rise the soil water retention capacity and protect the soil from secondary salinization.
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Original Russian Text © A.V. Smagin, G.M. Khakimova, D.A. Khineeva, N.B. Sadovnikova, 2008, published in Pochvovedenie, 2008, No. 11, pp. 1344–1353.
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Smagin, A.V., Khakimova, G.M., Khineeva, D.A. et al. Gravity factor of the formation of the field and capillary water capacities in soils and artificial layered soil-like bodies. Eurasian Soil Sc. 41, 1189–1197 (2008). https://doi.org/10.1134/S1064229308110070
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DOI: https://doi.org/10.1134/S1064229308110070