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THE SOLUBILITY OF PHOSPHATE IN A CALCAREOUS SOIL
Author(s) -
LARSEN SIGURD
Publication year - 1966
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.1365-2389.1966.tb01458.x
Subject(s) - solubility , calcareous , dissolution , monocalcium phosphate , phosphate , lime , precipitation , solubility equilibrium , chemistry , calcium carbonate , carbonate , inorganic chemistry , mineralogy , environmental chemistry , geology , materials science , metallurgy , organic chemistry , paleontology , physics , fishery , meteorology , fish <actinopterygii> , fish meal , biology
Summary The concept of chemical potentials was used to study the solubility of phosphate in a calcareous soil when equilibrium was approached by precipitation. By comparison with results obtained by dissolution of soil phosphate it was demonstrated that precipitation resulted in a considerably greater solubility than did dissolution. The relationship between the monocalcium phosphate potential and lime potential could be reconciled with the presence of hydroxyapatite in the soil. Ion activity products near to those of pure hydroxyapatite in the presence of calcium carbonate were also obtained.