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Soil Science Society of America Journal Abstract -

Influence of Sand on the Amount of Water-Dispersible Clay in Soil1


This article in SSSAJ

  1. Vol. 36 No. 5, p. 848-849
    Received: Jan 4, 1972
    Accepted: May 3, 1972

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  1. E. M. Ashford,
  2. L. G. Shields and
  3. J. V. Drew2



Water-dispersible clay in soils from a number of geographic locations increased in relation to clay measured by a standard procedure as the proportion of sand in the soils increased. Additions of sand to soils containing relatively small amounts of water-dispersible clay relative to “regular” clay markedly increased the yield of water-dispersible clay; medium sand and coarse sand were the most effective. Conversely, the removal of sand from soil containing large amounts of sand reduced the yield of water-dispersible clay. The abrasive action of sand during agitation associated with water dispersion evidently breaks down aggregates containing clay.

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