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Soil Science Society of America Journal Abstract -

Defining Soil Buffer Power: Implications for Ion Diffusion and Nutrient Uptake Modeling


This article in SSSAJ

  1. Vol. 54 No. 5, p. 1505-1507
    Received: June 26, 1989

    * Corresponding author(s):
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  1. K. C. J. Van Rees ,
  2. N. B. Comerford and
  3. P. S. C. Rao
  1. Dep. of Soil Science, Univ. of Saskatchewan, Saskatoon, SK S7N 0W0, Canada
    Soil Science Dep. 2169 McCarty Hall, Univ. of Florida, Gainesville, FL 32611-0151



Various definitions of the nutrient buffer power of soils, based on ion-exchange isotherms, have been proposed in the literature. However, incorrect definitions can result in erroneous estimations of solute diffusion coefficients and nutrient replenishment of soil solution, hence, rates of nutrient supply for plant nutrient uptake. This note presents conditions under which each definition of buffer power is valid, and situations where inherent assumptions may not be valid.

This work was funded by the Cooperative Research in Forest Fertilization (CRIFF) program. A contribution of the Florida Agric. Exp. Stn. Journal Series no. R-00002.

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