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A Comparison of Methods for Determining the Base-Exchange Capacity of Some Soils of the Lower Coastal Plain of the Southeastern United States¹

ABSTRACT

A comparison of 5 methods for the determination of cation-exchange capacity of soils of the Lower Coastal Plain was made on surface and subsoil samples of 4 soil series. The methods employed were: (1) direct distillation of NH₄⁺-saturated soils, (2) distillation of ammonia from NaCl extract, (3) barium chloride-triethanolamine, (4) calcium acetate-barium hydroxide, and (5) calcium acetateflame. On the average, method 3 gave results intermediate between those obtained by methods 1 and 2, method 4 gave low results and method 5 gave high results.

¹ Contribution from the Crops Research Division, A.R.S., U.S.D.A., and the Florida Agr. Exp. Sta., Gainesville.

² Plant physiologist and formerly soil scientist. Crops Research Division, A.R.S., U.S.D.A., Gainesville, Florida, and the Florida Agr. Exp. Sta. cooperating. The authors are indebted to Mrs. Louise S. Clements and Mrs. H. Eloise Taylor for their assistance in the chemical analyses.

Received for publication September 23, 1957. Accepted for publication December 6, 1957.