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Determination of Organic Phosphorus in Soils: I. Extraction Method
Author(s) -
Mehta N. C.,
Legg J. O.,
Goring C. A. I.,
Black C. A.
Publication year - 1954
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/sssaj1954.03615995001800040023x
Subject(s) - phosphorus , extraction (chemistry) , soil water , chemistry , environmental chemistry , significant difference , soil test , environmental science , soil science , chromatography , mathematics , organic chemistry , statistics
Abstract A procedure developed for determining organic phosphorus in soils consisted of successive extractions with concentrated HCl and 0.5 N NaOH at room temperature, and 0.5 N NaOH at 90° C. The difference in content of inorganic and total phosphorus in the combined extracts was taken as total organic phosphorus in the soil. In a group of soils, values obtained by the proposed method were higher than those by other methods. Tests indicated that the higher values resulted from the greater accuracy of the proposed method.