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

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...

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Bibliographic Details
Published in:	Soil Science Society of America journal Vol. 54; no. 5; pp. 1505 - 1507
Main Authors:	Van Rees, K. C. J., Comerford, N. B., Rao, P. S. C.
Format:	Journal Article
Language:	English
Published:	Madison, WI Soil Science Society of America 01-09-1990
Subjects:	Agronomy. Soil science and plant productions Biological and medical sciences Fundamental and applied biological sciences. Psychology Physical properties Physics, chemistry, biochemistry and biology of agricultural and forest soils Soil science Water and solute dynamics Availability Soils Isotherm Ion transport Nutrient Ion exchange Buffering capacity Modeling Solution
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Summary:	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.
Bibliography:	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.
ISSN:	0361-5995 1435-0661
DOI:	10.2136/sssaj1990.03615995005400050050x