Difference between revisions of "Abrupt textural change (WRB)"
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imported>Thierry Daunois (Created page with ''''Abrupt textural change''' is one of the diagnostic properties used, in the WRB system, to discriminate some soils from others. ==Description== The term Abrupt textural change...') |
imported>Jacques Ducloy m (5 revisions imported) |
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==Description== | ==Description== | ||
| − | The term Abrupt textural change | + | The term "Abrupt textural change" (from Latin ''abruptus'') refers to a very sharp increase in clay content within a limited depth range. |
==Criteria== | ==Criteria== | ||
| − | + | An abrupt textural change requires 8 percent or more clay in the underlying layer and : | |
| + | * doubling of the clay content within 7.5 cm if the overlying layer has less than 20 percent clay | ||
| + | or : | ||
| + | * 20 percent (absolute) increase in clay content within 7.5 cm if the overlying layer has 20 percent or more clay. | ||
| − | + | ==RSG in which abrupt textural change can be observed== | |
| − | ==RSG in which | ||
{{#ask: [[Has for diagnostic property::{{PAGENAME}}]] | {{#ask: [[Has for diagnostic property::{{PAGENAME}}]] | ||
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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) | ||
| + | |||
| + | [[Category:Diagnostic properties (WRB)]] | ||
Latest revision as of 19:12, 28 June 2017
Abrupt textural change is one of the diagnostic properties used, in the WRB system, to discriminate some soils from others.
Description
The term "Abrupt textural change" (from Latin abruptus) refers to a very sharp increase in clay content within a limited depth range.
Criteria
An abrupt textural change requires 8 percent or more clay in the underlying layer and :
- doubling of the clay content within 7.5 cm if the overlying layer has less than 20 percent clay
or :
- 20 percent (absolute) increase in clay content within 7.5 cm if the overlying layer has 20 percent or more clay.
RSG in which abrupt textural change can be observed
See also
- The FAO reference text, (2007 version)
