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Evaluating the Sulfur Status of Soils by Plant and Soil Tests¹

ABSTRACT

Several methods for evaluating the sulfur status of soils were compared. Among chemical procedures used, water and phosphate extractions gave the best agreement with sulfur A values and total sulfur uptake by alfalfa from Nebraska soils. Water was an inefficient extractant of sulfate from a Hawaiian Latosol. Calcium phosphate solution was a more convenient extractant than KH₂PO₄ for both Nebraska and Hawaii soils.

¹ Approved by the Directors as Paper Nos. 1398 and 639. Journal Series, Nebraska Agr. Exp. Sta. and Hawaii Agr. Exp. Sta., respectively. Presented before Div. IV, Soil Sci. Soc. Amer., Aug. 1963 at Ithaca, N. Y. Part of this work was supported by a grant from the Sulphur Institute.

² Formerly Associate Professor, Dept. of Agronomy, Univ. of Nebraska, now Associate Professor, Dept. of Agron. and Soil Sci., Univ. of Hawaii, Professor, and former Professor (deceased) Dept. of Agron., Univ. of Nebraska, respectively.

Received for publication July 5, 1963. Accepted for publication September 6, 1963.