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Soil Science Society of America Journal Abstract -

Hydrolysis of Condensed Phosphates in Soils1


This article in SSSAJ

  1. Vol. 29 No. 4, p. 487-488
    Received: Jan 6, 1965
    Accepted: Mar 26, 1965

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



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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