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Lithosolic Solodized-Solonetz Soils in Southwestern South Dakota¹

ABSTRACT

Solonetzic soils with thin calcareous sola occur in southwestern South Dakota. These profiles develop from sodium-rich calcareous bedrock shortly after the bedrock is exposed by erosion. Dispersion and column formation probably occur when most soluble salts are leached. However, there is some Na₂CO₃ and the pH is high so CaCO₃ solubility is reduced. Chestnut soils evolve if there is sufficient mineral-mound Ca to replace the exchangeable Na. Otherwise, solodized-Solonetz soils form without the aid of a fluctuating water table.

¹ Approved for publication by the Director of the South Dakota Agr. Exp. Sta. as Journal Article No. 478. Presented before Div. I, Soil Science Society of America, Dec. 5, 1960, at Chicago, Ill.

² Associate Agronomist and Graduate Assistant in Agronomy, respectively, South Dakota State College, Brookings.

Received for publication January 3, 1961. Accepted for publication August 4, 1961.