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Influence of Calcium on Phosphorus Availability in Muck Soil¹

ABSTRACT

In laboratory tests the addition of Ca greatly decreased the solubility of native and applied P in six different muck soils. Reducing the amount of Ca in the soil solution by applying materials having Ca-bonding properties increased the solubility of P in a muck soil. In a greenhouse experiment, tomatoes grown in muck soil limed and fertilized with phosphate in different amounts showed the depressing influence of lime on yield, P content in the plant tissue, and total P uptake by the plants. Liming increased the Ca content in the plant tissue.

¹ Journal Paper No. 1700, Purdue University, Agr. Exp. Sta., Lafayette, Ind.

² Rockefeller Foundation Fellow, and Professor and Assistant Professor of Horticulture, respectively. Senior author is now Head of Department of Reclamation Institute, Nowogrodzka 50, IMUZ, Warsaw, Poland.

Received for publication January 11, 1961. Accepted for publication May 23, 1961.