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Physical, Chemical, and Mineralogical Characteristics of Soils from Volcanic Ash in Northern Idaho: II. Phosphorus Sorption
Author(s) -
Jones J. P.,
Singh B. B.,
Fosberg M. A.,
Falen A. L.
Publication year - 1979
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/sssaj1979.03615995004300030023x
Subject(s) - allophane , sorption , volcanic ash , soil water , silt , environmental chemistry , geology , clay minerals , andosol , phosphorus , mineralogy , volcano , geochemistry , soil science , adsorption , chemistry , environmental science , geomorphology , organic chemistry
Volcanic ash soils from northern Idaho sorbed considerable amounts of P depending upon the parent material, physical, chemical, and mineralogical characteristics of the soils. Upper horizons of the soil derived from volcanic ash sorbed more P than did lower horizons which were derived from glacial sediment. The magnitude of P sorption was related to the extractable allophane content and quantity of concretions. The clay fraction adsorbed more P than the silt fraction. Sorption of P was due mainly to the presence of Al in concretions and the presence of higher amounts of amorphous materials. Iron, Al, Mn and other clay minerals contributed to the sorption capacity of the soils. Detailed roles of these factors in sorption of P by soils, clays, and concentrations are discussed.