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This article in AJ

  1. Vol. 54 No. 5, p. 393-395
    Received: Dec 18, 1961

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Effects of Four Amendments on Soil Physical and on Yield and Quality of Putting Greens1

  1. R. R. Smalley,
  2. W. L. Pritchett and
  3. L. C. Hammond2



Peat and vermiculite increased penetrability. Hydraulic conductivity was increased by fired clay and decreased by vermiculite and colloidal phosphate. Fired day and peat increased noncapillary pore space while vermiculite and colloidal phosphate produced a decrease. Grass yield and quality were increased by vermiculite and cotloidal phosphate treatments. Turf yield and quality decreased with an increase in hydraulic conductivity and in the force required to penetrate the soil. Bulk density was not a satisfactory index of grassproducing ability of soil mixtures.

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