Abstract
AbstractThe 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‐.
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