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Phosphorus sorption by acid soils: comparative study of some parameters

Published online by Cambridge University Press:  27 March 2009

J. Arines  and
Maria Sainz
J. Arines
Affiliation:
Unidad Estructural de Fertilidad de Suelos y Nutritión Vegetal, Institute de Investigaciones Agrobiologicas de Oalicia (CSIC), Apartado 122, 15080- Santiago de Corrvpostela, Spain
Maria Sainz
Affiliation:
Unidad Estructural de Fertilidad de Suelos y Nutritión Vegetal, Institute de Investigaciones Agrobiologicas de Oalicia (CSIC), Apartado 122, 15080- Santiago de Corrvpostela, Spain
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Summary

A comparative study of sorption maxima (simple and double Langmuir equations) and buffer capacity of acid soils was made in order to select the most useful P-sorption parameter. Data were obtained from 20 acid soils from Galicia (north-west Spain) and selection was made by linear and multiple regressions among sorption parameters, and between these and some soil characteristics related to phosphate sorption (clay and organicmatter content, pH in NaF, and 0·5 M-CuCl2-extracted Al).

The phosphate buffer capacity, determined by the slope of the regression ‘sorbed-P v. logc’, was the best parameter to represent soil phosphate sorption behaviour. 0·5 M-CuCl2- extracted Al was the edaphic characteristic which best related to sorption properties.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 109 , Issue 1 , August 1987 , pp. 87 - 94
Copyright
Copyright © Cambridge University Press 1987

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