The Movement of Sulfate Salts in Soils1
- A. R. Swoboda2 and
- G. W. Thomas3
The movement of potassium sulfate in columns of calcium-saturated Cecil soil was studied. The desorption by hydrolysis of adsorbed SO42- ions was found to influence the distribution of other ions in the columns. Leaching with 10.4 inches of water caused only slight hydrolysis of adsorbed SO42- and adsorbed cations. Excessive leaching with 104 and 207 inches of distilled water caused considerable hydrolysis and displacement of adsorbed SO42- as well as K+ and Ca2+.
The amount of hydrolysis in columns of calcium-saturated Yolo soil which does not adborb SO42- was found to be much lower than in the Cecil soil columns.
Soil profiles taken from central Piedmont of Virginia showed substantially the same distribution of SO42- as found in laboratory columns. The highest concentration of Mg2+ always was found to occur at the same depth as a maximum concentration of SO42-.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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