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Phosphate Sorption by Soils: III. The P Diffusion‐Precipitation Model Tested for Three Acid Sandy Soils
Author(s) -
Riemsdijk W. H.,
Linden A. M. A.,
Boumans L. J. M.
Publication year - 1984
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/sssaj1984.03615995004800030015x
Subject(s) - soil water , subsoil , precipitation , sorption , diffusion , chemistry , phosphate , soil science , mineralogy , environmental chemistry , geology , adsorption , thermodynamics , meteorology , organic chemistry , physics
A recently developed diffusion‐precipitation model was tested for three acid sandy soils: two topsoils and one subsoil. It is shown that experimental data fit the model when constant P concentrations are used. As the model predicts no particular curve, third degree polynomials were used to describe the data. For further testing, increasing and decreasing P concentrations were used. Comparison of experimental and computer simulation data show that the model is also valid for varying concentrations. The concentration at the metal‐oxide/metal‐phosphate interface (indicated as C 4 ) is relatively high: 0.1 to 0.25 mmol/L. The diffusion‐precipitation model is useful in modeling P behavior in soils.