HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Mehta, N. C. Articles by Black, C. A. Search for Related Content PubMed Articles by Mehta, N. C. Articles by Black, C. A. Agricola Articles by Mehta, N. C. Articles by Black, C. A.

Determination of Organic Phosphorus in Soils: I. Extraction Method¹

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.

¹ Soil Phosphorus Research Project of the North Central Region. Contribution from the Iowa Agr. Exp. Sta. and the B.P.I.S.A.E., U. S. Dept. Agr. Journal Paper No. J-2378 of the Iowa Agr. Exp. Sta., Ames, Iowa. Project 1183.

² Former graduate student; Soil Scientist, U. S. Dept. Agr. and former Collaborator, Iowa Agr. Exp. Sta.; former Soil Scientist, U. S. Dept. Agr., and Collaborator, Iowa Agr. Exp. Sta., now Soil Scientist, Dow Chemical Co., Seal Beach, Calif., and Professor of Soils, respectively.

Received for publication December 31, 1953.