Difference between revisions of "Ferralic properties (WRB)"
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* The [http://www.fao.org/ag/agl/agll/wrb/doc/wrb2007_corr.pdf FAO reference text], (2007 version) | * The [http://www.fao.org/ag/agl/agll/wrb/doc/wrb2007_corr.pdf FAO reference text], (2007 version) | ||
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Revision as of 10:47, 25 July 2011
Ferralic properties is one of the diagnostic properties used, in the WRB system, to discriminate some soils from others.
Description
The term "Ferralic properties" (from Latin ferrum, iron, and alumen, alum) refers to mineral soil material that has a relatively low CEC. It also includes soil materials that fulfil the requirements of a ferralic horizon except texture.
Criteria
Ferralic properties require in some subsurface layer :
- a CEC (by 1 M NH4OAc) of less than 24 cmolc kg-1 clay
or :
- a CEC (by 1 M NH4OAc) of less than 4 cmolc kg-1 soil and a Munsell chroma of 5 or more, moist.
RSG in which ferralic properties can be observed
See also
- The FAO reference text, (2007 version)
