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Mineralization of Organic Phosphorus in Soils as Affected by Addition of Inorganic Phosphorus¹

ABSTRACT

The enhancement of mineralization of soil organic P that previous investigators had reported as resulting from incubation of soils with added inorganic P was not found in laboratory experiments. Previously reported recoveries of more than 100% of inorganic P added to certain alkaline soils before incubation, which also might be a consequence of enhanced mineralization of soil organic P, could not be reproduced except where the P was added in an acidified solution. Presumably an acidified solution was used by mistake in the previous work.

¹ Journal Paper no. J-5726 of the Iowa Agr. & Home Econ. Exp. Sta., Ames. Project no. 1183.

² Graduate Assistant and Professor of Soils, respectively.

Received for publication July 10, 1967. Accepted for publication September 5, 1967.