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This article in SSSAJ

  1. Vol. 26 No. 3, p. 222-227
    Received: June 26, 1961
    Accepted: Sept 6, 1961

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Phosphate Diffusion to Plant Roots1

  1. S. R. Olsen,
  2. W. D. Kemper and
  3. R. D. Jackson2



Diffusion of phosphate appears to account for the observed rates of P uptake by corn roots. A diffusion equation was developed which takes into consideration the effect of plant removal of P on the relationship between solution P and solid phase P, in addition to the tortuosity and ionic interaction factors of the porous system. The equation has the same form as the heat flow equation, hence solutions of the latter can be applied to describe phosphate diffusion in soils.

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