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This article in AJ

  1. Vol. 56 No. 3, p. 355-359
    Received: Dec 6, 1963

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Soil Temperature and Phosphorus Effects Upon Nutrient Absorption by Barley1

  1. J. F. Power,
  2. D. L. Grunes,
  3. G. A. Reichman and
  4. W. O. Willis



N and P absorption by barley was maximum at soil temperatures near optimum for dry matter production. Optimum temperatures were 52 to 59° F. for a soil low in P, and slightly higher for a soil higher in NaHCO3-soluble P. Fertilizer P absorption was more dependent upon soil temperature than was the absorption of soil P. The relation between dry weights and percent P in plant tops varied with temperature. The “critical level” for P was lowest, and the efficiency of P utilization was highest at the 59° F. temperature.

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