Defining Soil Buffer Power: Implications for Ion Diffusion and Nutrient Uptake Modeling
- K. C. J. Van Rees ,
- N. B. Comerford and
- P. S. C. Rao
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.
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