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THE EFFECT OF PHOSPHATE APPLICATIONS ON THE DIFFUSION COEFFICIENTS AND AVAILABLE PHOSPHATE IN AN ACID SOIL
Author(s) -
KUNISHI H. M.,
TAYLOR A. W.
Publication year - 1975
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.1365-2389.1975.tb01951.x
Subject(s) - monocalcium phosphate , phosphate , diffusion , chemistry , loam , phosphate minerals , inorganic chemistry , soil water , geology , soil science , organic chemistry , thermodynamics , physics , fishery , fish <actinopterygii> , fish meal , biology
Summary The apparent bulk phosphate self‐diffusion coefficient, resin extractable and isotopically exchangeable phosphate were measured on an acid Cecil sandy loam soil pre‐treated with calcium carbonate and monocalcium phosphate. Apparent diffusion coefficients increased four‐fold with a five‐fold increase in phosphate addition, but were not increased by liming. Resin extractable phosphate was greater than isotopically exchangeable after large phosphate additions. Calculated porous self‐diffusion coefficients did not change as a result of phosphate additions. The contribution of solid‐phase phosphate to diffusion was small and close to the limits of measurement.