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This article in SSSAJ

  1. Vol. 46 No. 1, p. 155-158
    Received: Apr 29, 1981
    Accepted: Sept 2, 1981

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Water Diffusivity of a Field Soil1

  1. B. E. Clothier and
  2. I. White2



The shapes of absorption profiles of water content in both undisturbed and repacked Bungendore fine sand are compared. As expected the repacked sand has a near-rectangular profile of absorption so that the diffusivity is strongly dependent upon the water content. However, the undisturbed sand has a flatter absorption profile and hence a diffusivity that does not vary as strongly with respect to water content. Thin-section micrographs show that repacking, although not altering the total porosity, had destroyed the continuous, biologically produced mesopores of the undisturbed soil. These mesopores are a possible cause of the different diffusivities in the undisturbed and repacked soil.

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