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The effect of phosphate addition on the solubility of phosphate in soil

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Summary

The effect of phosphate addition on the phosphate potential of suspensions of three contrasting soils was investigated.

The results showed that even shaking the soil suspension for 14 days was insufficient to reach equilibrium in the soil: solution system.

Increasing the phosphate additions to the soils resulted in decreasing phosphate potentials. Furthermore, on addition of phosphate to the soils, the solubility data did not conform to those anticipated on the basis of phosphate minerals expected to be present in the soils. The results indicated that the phosphate concentration in the soil-solution was controlled by an adsorption type of mechanism.

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Authors and Affiliations

  1. Department of Soil Fertility and Plant Nutrition, The Royal Veterinary and Agricultural University, Copenhagen, Denmark

    M. A. Elrashidi & S. Larsen

  2. Soils and Water Use Laboratory, National Research Centre, Cairo, Egypt

    M. A. Elrashidi

Authors
  1. M. A. Elrashidi
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  2. S. Larsen
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Elrashidi, M.A., Larsen, S. The effect of phosphate addition on the solubility of phosphate in soil. Plant Soil 50, 585–594 (1978). https://doi.org/10.1007/BF02107211

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  • DOI: https://doi.org/10.1007/BF02107211

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