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Science Keywords > EARTH SCIENCE > LAND SURFACE > SOILS > CATION EXCHANGE CAPACITY

TERME PRÉFÉRENTIEL

CATION EXCHANGE CAPACITY  

DÉFINITION

  • The sum of exchangeable bases plus total soil acidity at a specific pH value usually 7.0 or 8.0. When acidity is expressed as salt extractable acidity, the cation exchange capacity (CEC) is called the effective cation exchange capacity(ECEC) because this is considered to be the CEC of the exchanger at the native pH value. It is usually expressed in centimoles of charge per kilogram of exchanger.

CONCEPT GÉNÉRIQUE

NOTE DE CHANGEMENT

  • 2017-03-10 09:02:50.0 [tstevens] update Definition (The sum of exchangeable bases plus total soil acidity at a specific pH value usually 7.0 or 8.0. When acidity is expressed as salt extractable acidity, the cation exchange capacity (CEC) is called the effective cation exchange capacity(ECEC) because this is considered to be the CEC of the exchanger at the native pH value. It is usually expressed in centimoles of charge per kilogram of exchanger.); update Definition (Jackson, J.A. (1997) Glossary of Geology. 4th ed. Alexandria, VA:American Geological Institute. 769 p.);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/9bad3c7b-daf6-428a-89bd-ce62b074dfcf

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