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Predicting the rate of dissolution of lime in soil
Author(s) -
NYE P. H.,
AMELOKO A. Y.
Publication year - 1987
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1987.tb02161.x
Subject(s) - lime , dissolution , diffusion , soil science , mineralogy , soil acidification , chemistry , soil ph , base (topology) , soil water , environmental science , materials science , mathematics , metallurgy , thermodynamics , organic chemistry , physics , mathematical analysis
SUMMARY A disc of CaCO 3 was brought into contact with a column of moist acid soil, incubated for 6 days, the soil cut into thin sections, and the pH measured. The pH profile suggested that the rate of dissolution was controlled by the rate of acid‐base diffusion in the soil near the interface of the soil and the CaCO 3 disc. A mechanistic model was developed, containing no arbitrary assumptions or fitting parameters, to predict the rate of neutralization of acid soil by CaCO 3 particles of different size grades and at different application rates. The course of neutralization of soil at pH 3.0 and 4.9 with fine, medium and coarse grades of CaCO 3 was measured and compared with the model predictions. The agreement was satisfactory within the limits imposed by experimental difficulties.