Difference between revisions of "Ferralic properties (WRB)"
From Wicri Urban Soils
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==Description== | ==Description== | ||
| − | The term "Ferralic properties" refers to. | + | 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== | ==Criteria== | ||
| − | Ferralic properties : | + | Ferralic properties require in some subsurface layer : |
| − | + | * a CEC (by 1 ''M'' NH<sub>4</sub>OAc) of less than 24 cmol<sub>c</sub> kg<sup>-1</sup> clay | |
| + | or : | ||
| + | * a CEC (by 1 ''M'' NH<sub>4</sub>OAc) of less than 4 cmol<sub>c</sub> kg<sup>-1</sup> soil and a Munsell chroma of 5 or more, moist. | ||
==RSG in which ferralic properties can be observed== | ==RSG in which ferralic properties can be observed== | ||
Revision as of 17:59, 26 October 2009
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)
