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Determination of Organic Phosphorus in Soils: III. Comparison of Methods¹

ABSTRACT

Kaila and Virtanen found that in most of the soils they analyzed for organic phosphorus they obtained a higher figure with an extraction method they proposed than with the extraction method proposed earlier by Mehta and coworkers. Analyses of samples of five soils by the authors showed that the Mehta method yielded more organic phosphorus than the Kaila-Virtanen method in all five samples.

¹ Journal Paper No. J-3270 of the Iowa Agr. and Home Econ. Exp. Station, Ames, Iowa. Project No. 1183. Contribution from the Department of Agronomy.

² Former Graduate Assistant, now Assistant Professor, Dept. of Soils, Rutgers Univ., New Brunswick, New Jersey; and Professor of Soils, respectively.

Received for publication October 7, 1957. Accepted for publication February 26, 1958.