Difference between revisions of "Ornithogenic material (WRB)"
From Wicri Urban Soils
imported>Thierry Daunois |
imported>Thierry Daunois |
||
| Line 19: | Line 19: | ||
* 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 materials (WRB)]] | ||
Revision as of 10:51, 25 July 2011
Ornithogenic material is one of the diagnostic materials used, in the WRB system, to discriminate some soils from others.
Contents
Description
Ornithogenic material (from Greek ornithos, bird, and genesis, origin) is material with strong influence of bird excrement. It often has a high content of gravel that has been transported by birds.
Diagnostic criteria
Ornithogenic material has :
- remnants of birds or bird activity (bones, feathers, and sorted gravel of similar size)
and :
- a P2O5 content of 0.25 percent or more in 1-percent citric acid
RSG in which ornithogenic material can be observed
See also
- The FAO reference text, (2007 version)
