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Fixed soil potassium nature of the fixation and liberation processes [I.] ; II. Improved extracting solutions for determining available soil potassium with quick tests ; III. Revised procedure for determination of exchangeable potassium, sodium, magnesium, and calcium in soils with the Beckman model DU flame spectrophotometer /Dubrovin, Kenneth Paul, January 1956 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1956. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 148-159).
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