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This article in SSSAJ

  1. Vol. 32 No. 1, p. 64-68
    Received: Apr 10, 1967
    Accepted: Sept 14, 1967

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Interaction of Limestone Particle Size and Phosphorus on the Control of Soil Acidity1

  1. Harold L. Barrows,
  2. Alan W. Taylor2 and
  3. Elmer C. Simpson3



Various size fractions of limestone and calcite were equilibrated in a Leon fine sand previously treated with varying rates of phosphorus. The efficiency of 42- to 48-mesh liming material was reduced 1.1, 1.6, and 5.8%, respectively, by the addition of 25, 50, and 150 ppm P. The same levels of P reduced the efficiency of 12- to 14-mesh material 2.2, 3.6, and 8.5%. Material finer than 80-mesh was not affected. The reduced efficiencies were attributed to the formation of surface coatings of phosphatic material. The susceptibility of a given soil to coat liming material may be assessed by measurements of hydrogen ion (H+) and phosphate (H2PO4-) potentials.

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