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Effect of Mineral Weathering on the Response of Sodic Soils to Exchangeable Magnesium
Author(s) -
Alperovitch N.,
Shainberg I.,
Rhoades J. D.
Publication year - 1986
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1986.03615995005000040014x
Subject(s) - soil water , dissolution , weathering , chemistry , hydraulic conductivity , distilled water , environmental chemistry , magnesium , electrolyte , mineral , mineralogy , soil science , geology , geochemistry , chromatography , organic chemistry , electrode
The clay dispersivity and hydraulic conductivity (HC) properties of three California soils were studied as a function of exchangeable Na and electrolyte concentration in Na/Ca and Na/Mg systems. Soils that are relatively stable chemically are concluded to be the most sensitive to low levels of exchangeable Na and to the “specific” effect of exchangeable Mg when leached with distilled water. The results agree with the hypothesis that the susceptibility of soils to HC decreases produced by exchangeable Na and exchangeable Mg depends on their rates of mineral dissolution. Exchangeable Mg reduces the dissolution rates of noncalcareous soils and increases soil susceptibility to exchangeable Na under conditions of low electrolyte concentrations.