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This article in SSSAJ

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

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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



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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