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

This Article Full Text (PDF) A correction has been published 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 HighWire Citing Articles via Google Scholar Google Scholar Articles by Van Diest, A. Articles by Black, C. A. Search for Related Content PubMed Articles by Van Diest, A. Articles by Black, C. A. Agricola Articles by Van Diest, A. Articles by Black, C. A.

Test of Two Methods for Measuring a Labile Fraction of Inorganic Phosphorus in Soils¹

ABSTRACT

Measurements of the phosphorus extracted from samples of 70 soils by the 0.03N NH₄F, 0.025N HCl method of Bray and Kurtz and the anion-exchange resin method of Amer and co-workers were used as the basis for predicting the yields of phosphorus in plants grown on the soils in the greenhouse. The latter method gave the more precise prediction, but the regression coefficient was smaller for alkaline soils than for acid soils. No distinction between acid and alkaline soils was necessary where the regression of the yield of phosphorus was calculated on the H₂PO₄^- and HPO₄⁼ taken up from the soils by the resin. The closest agreement between observed and calculated yields of phosphorus in the test plants was obtained with an equation based on the kinetics of phosphorus absorption by plants.

¹ Journal Paper No. J-3439 of the Iowa Agr. and Home Econ. Exp. Sta., Ames. Project No. 1183. Contribution from the Departments of Agronomy and Statistics. Presented before Div. IV, Soil Science Society of America, Nov. 18, 1959, at Cincinnati, Ohio.

² Graduate Assistant, Associates, and Professor, respectively. A. Van Diest is now Assistant Professor, Dept. of Soils, Rutgers University, New Brunswick, N. J.; and R. F. White is Assistant Professor, Dept. of Statistics, University of Wyoming, Laramie. The authors are indebted to Dr. H. O. Hartley for advice on statistical problems.

Received for publication February 10, 1960. Accepted for publication May 13, 1960.

This article has been cited by other articles:

				T. H. Dao Ligands and Phytase Hydrolysis of Organic Phosphorus in Soils Amended with Dairy Manure Agron. J., July 1, 2004; 96(4): 1188 - 1195. [Abstract] [Full Text] [PDF]