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A Modified Chang and Jackson Procedure for Routine Fractionation of Inorganic Soil Phosphates
Author(s) -
Petersen G. W.,
Corey R. B.
Publication year - 1966
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/sssaj1966.03615995003000050012x
Subject(s) - fractionation , phosphate , chemistry , phosphorus , extraction (chemistry) , pipette , chromatography , soil test , environmental chemistry , soil water , geology , soil science , organic chemistry
A method is described for the routine fractionation of inorganic soil phosphates. Use of constant suction pipettes, two molybdophosphoric reductants with different sensitivities, and an isobutyl alcohol extraction for the determination of reductant soluble phosphates greatly increased the speed of the phosphorus determinations. Results from 100 deplicated soil samples had average coefficients of variation and correlation between duplicates within samples for the four phosphate fractions of 3.7% and 0.998, respectively.