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The Effect of Lime on the Phosphate Potential and Resin-Extractable Phosphate in Five Acid Soils¹

Division of Chemical Development, Tennessee Valley Authority, Wilson Dam, Ala.

ABSTRACT

The equilibrium phosphate concentrates in five acid soils showed little change on the addition of excess calcium carbonate, but the amounts of phosphate extracted on shaking with anion exchange resin increased significantly with rising pH. Liming apparently effects some alteration in the soil phosphates, perhaps by causing more phosphate to be adsorbed in a readily removable form.

¹ Contribution from the Fundamental Research Branch, Division of Chemical Development, TVA, Wilson Dam, Ala.

Received for publication December 9, 1964. Accepted for publication March 9, 1965.