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This article in AJ

  1. Vol. 60 No. 1, p. 20-23
    Received: Apr 26, 1967

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Sulfur Content and Yield of Alfalfa in Relation to Plant Nitrogen and Sulfur Fertilization1

  1. R. C. Sorensen,
  2. E. J. Penas and
  3. U. U. Alexander2



Nitrogen and S percentages or yields or all of these were determined for alfalfa grown in two areas of Nebraska where soil and environmental conditions are markedly different. The much higher critical concentrations of S found in forage grown on sandy soils of northeast Nebraska than the commonly accepted value of 0.22% were attributed to effects of drouth. N and S contents were closely related in alfalfa grown with and without applied S both on drouthy sandy soils and on a highly fertile soil with natural subirrigation. The curve relating N and S percentages in alfalfa grown on soils where S was applied was essentially parallel to that for soils where S deficiency was not a problem. N concentrations increased with yield increase to applied S.

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