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This article in SSSAJ

  1. Vol. 32 No. 3, p. 443-444
    Received: Jan 8, 1968
    Accepted: Feb 28, 1968

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Mechanism for Soil Potassium Release by Drying1

  1. A. D. Scott and
  2. S. J. Smith2



When large flakes of edge-weathered biotite were air-dried, some of the silicate layers were forced apart while others were brought closer together. Since the space between the separated layers developed into visible cracks that penetrated the inner mica core, the dry flakes provide visual evidence for a mechanism by which interlayer K can be released when soils are dried. The collapse of part of the lattice can give rise to a simultaneous occurrence of K fixation.

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