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Nature of Phosphorus Retention and Adsorption with Depth in Soil Columns
Author(s) -
Logan T. J.,
McLean E. O.
Publication year - 1973
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/sssaj1973.03615995003700030013x
Subject(s) - adsorption , fractionation , chemistry , leaching (pedology) , phosphorus , penetration (warfare) , zoology , analytical chemistry (journal) , chromatography , mineralogy , soil science , soil water , geology , mathematics , biology , organic chemistry , operations research
Sequential fractionation of adsorbed 32 P and changes in equilibrium P concentration (EPC) with depth were studied in a column leaching experiment. In general, the percentage of NH 4 Cl‐extractable P decreased rapidly with depth; the percentage of NH 4 F‐extractable P decreased rapidly in the initial 2‐cm depth and then remained fairly constant. Percentage NaOH‐extractable P increased as that of NH 4 F‐extractable P decreased, and that of H 2 SO 4 ‐extractable P increased gradually with depth. Equilibrium P concentration (EPC) decreased with depth and increased as rate of P applied increased. These EPC values reflected both depth of penetration of applied P and level of native P in the soil.