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Evaluation of laboratory indexes of absorption of soil phosphorus by plants: II

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Summary

A comparison was made of several laboratory methods for estimating the yield of phosphorus in plants grown in greenhouse cultures on samples of 22 soils from different parts of the United States. The methods investigated and their rank in order of increasing precision of the estimates of the yield of phosphorus were as follows: extraction with lactic acid, calcium lactate buffer solution ⪕ extraction with 2 per cent citric acid solution < extraction with 0.03N NH4F, 0.025N HCl solution < “percentage phosphorus saturation” (found as follows: 100 × labile phosphorus by isotopic dilution/ “phosphorus adsorption capacity” according to Langmuir adsorption equation) ⪕ labile phosphorus by isotopic dilution ⪕ phosphorus extracted by water.

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Authors
  1. E. J. Thompson
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  2. A. L. F. Oliveira
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  3. U. S. Moser
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  4. C. A. Black
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Additional information

Journal Paper No. J-3747 of the Iowa Agricultural and Home Economics Experiment Station, Ames, Iowa. Project No. 1183. Contribution from the Department of Agronomy.

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Thompson, E.J., Oliveira, A.L.F., Moser, U.S. et al. Evaluation of laboratory indexes of absorption of soil phosphorus by plants: II. Plant Soil 13, 28–38 (1960). https://doi.org/10.1007/BF01666473

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  • DOI: https://doi.org/10.1007/BF01666473

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