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This article in AJ

  1. Vol. 56 No. 2, p. 218-221
    Received: Aug 14, 1963

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Phosphorus Uptake by Plants and Readily Extractable Phosphorus in Soils1

  1. R. W. Blanchar and
  2. A. C. Caldwell



Phosphorus uptake from calcareous and noncalcareous soils was correlated with available P as determined by five methods. With calcareous soils all of the methods except the 1-to-10 Bray No. 1 were suitable for estimating available P. With noncalcareous soils the best correlations between uptake and available P were obtained using the Morgan and water solubility methods. Relationships between available P and soil properties such as amount and kind of carbonates in calcareous soils and forms of P were examined.

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