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ABSTRACT
An extraction procedure using the chelating resin Dowex A-1 after an HF-HCl pretreatment is described for the extraction of high molecular weight organic phosphorus compounds. This procedure appears to reduce the degradation of high molecular weight compounds that occur with more drastic extraction techniques now in use
1 Contribution from the Department of Soil Science, University of Guelph, Guelph, Ontario. Presented before Div. S-3, Soil Science Society of America, Columbus, Ohio, Nov. 4, 1965. Financial assistance granted by the National Research Council of Canada is gratefully acknowledged.
2 Assistant Professor and Research Assistant, respectively.
Received for publication July 1, 1966. Accepted for publication August 22, 1966.
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