Diagnostic horizons (WRB)
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A diagnostic horizon is a soil layer containing a combination of characteristics typical of that kind of soil. These characteristics may be of structure, origin.
The World Reference Base refers to 39 diagnostic horizons.
The diagnostic horizons
- Albic horizon
- Anthraquic horizon
- Anthric horizon
- Argic horizon
- Calcic horizon
- Cambic horizon
- Cryic horizon
- Duric horizon
- Ferralic horizon
- Ferric horizon
- Folic horizon
- Fragic horizon
- Fulvic horizon
- Gypsic horizon
- Histic horizon
- Hortic horizon
- Hydragric horizon
- Irragric horizon
- Melanic horizon
- Mollic horizon
- Natric horizon
- Nitic horizon
- Petrocalcic horizon
- Petroduric horizon
- Petrogypsic horizon
- Petroplinthic horizon
- Pisoplinthic horizon
- Plaggic horizon
- Plinthic horizon
- Salic horizon
- Sombric horizon
- Spodic horizon
- Takyric horizon
- Terric horizon
- Thionic horizon
- Umbric horizon
- Vertic horizon
- Voronic horizon
- Yermic horizon
Source
- The FAO's [WRB 2007 report]
