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Defining Soil Buffer Power: Implications for Ion Diffusion and Nutrient Uptake Modeling
Author(s) -
Van Rees K. C. J.,
Comerford N. B.,
Rao P. S. C.
Publication year - 1990
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1990.03615995005400050050x
Subject(s) - nutrient , buffer (optical fiber) , diffusion , soil nutrients , environmental science , power (physics) , soil water , soil science , computer science , chemistry , thermodynamics , physics , telecommunications , organic chemistry
Abstract 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.