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This article in AJ

  1. Vol. 54 No. 2, p. 101-106

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The Sulfur Status and Sulfur Supplying Power of Oregon Soils1

  1. M. E. Harward,
  2. Tsun Tien Chao and
  3. S. C. Fang2



Levels of organic S in soils were found to range from < 100 to > 700 ppm. Correlation coefficients for relative yields of alfalfa were in the order: sulfur “A” values, % S in plant, and extractable S plus sulfate release on incubation. A sulfur “A” value of 20 pounds per acre and a plant content of 0.22% S represented levels above which little response occurred. S application may affect nitrogen relationships of alfalfa.

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