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cation-exchange capacity

A Dictionary of Earth Sciences | 1999 | 288 words | Copyright

cation-exchange capacity (CEC) The total amount of exchangeable cations that a particular material or soil can adsorb at a given pH. Exchangeable cations are held mainly on the surface of colloids of clay and humus, and are measured in milligram-equivalents per 100 g of material or soil.

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AILSA ALLABY and MICHAEL ALLABY. "cation-exchange capacity." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

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