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This article in SSSAJ

  1. Vol. 29 No. 4, p. 487-488
     
    Received: Jan 6, 1965


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doi:10.2136/sssaj1965.03615995002900040040x

Hydrolysis of Condensed Phosphates in Soils1

  1. R. R. Allmaras and
  2. C. A. Black
  1. Soil and Water Conservation Research Division, ARS, USDA, at Morris, Minnesota
    Iowa State University

Abstract

Abstract

Hydrolytic degradation of the condensed phosphates of fertilizer-grade calcium metaphosphate (CMP) in soils involves several steps, including formation of a dense, viscous liquid from the vitreous portion of the CMP. Experiments indicate that the rate-controlling step in the early stages of transformation of condensed P to orthophosphate in soils treated with solid particles of CMP was the degradation of the viscous liquid and not the hydrolysis of the condensed P in the solution derived from the viscous liquid.

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