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Phosphorus Fixation as a Transfer Controlled Phenomenon¹

ABSTRACT

Phosphorus fixation in various soils was accelerated by: (i) the application of P in solution thus inducing its immediate dispersion in the soil, and (ii) increasing the rate of movement of the P in the soil by changes in the water regime. It was concluded that the dispersion of P in the fertilized soil volume is the rate-limiting step in the process of its fixation and thus P fixation could be described as a transfer-controlled process.

¹ Contributio from the Fertilizer Development and Soil Fertility Laboratory, Technion, Haifa, Israel. This research is a part of a doctoral thesis submitted to the Hebrew University, Jerusalem, Israel, by the senior author and was supported by the Fertilizer Development Council, Becrsheva, Israel.

² Lecturer and Associate Professor of Soil Chemistry, respectively; Technion—Israel Institute of Technology, Haifa, Israel. The senior author is now at the American Dental Association, Res. Div., Nat. Bur. Stand., Wash., D. C.

Received for publication November 20, 1964. Accepted for publication February 18, 1965.