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Article: Comparison of extraction techniques for measuring exchangeable cations in calcareous soils.
- Article from:
- Australian Journal of Soil Research
- Article date:
- May 1, 2004
- Author:
CopyrightCOPYRIGHT 2004 CSIRO Publishing. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Introduction
Cation exchange capacity (CEC) measurement in alkaline soils is complicated by the need to remove soluble cations and the requirement to buffer extraction solution at a pH to prevent soluble carbonates from dissolving (Tucker 1971, 1974; Ross 1995). Method 15C1 from the Australian Soil and Land Survey Handbook Australian Laboratory Handbook of Soil and Water Chemical Methods" (Rayment and Higginson 1992), colloquially known as the Tucker method, is often quoted as the preferred technique for alkaline soils (Rengasamy and Churchman 1999). Due to the high labour requirements of this method, very few routine testing laboratories have adopted it without ...