Order:
[ ]
| Code |
Name |
Description |
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Oxisols that have aquic conditions for some time in normal years (or artificial drainage) in one or more horizons within 50 cm of the mineral soil surface and have one or more of the following:
- A histic epipedon; or
- An epipedon with a color value, moist, of 3 or less
and, directly below it, a horizon with chroma of 2 or less; or
- Distinct or prominent redox concentrations within 50 cm of the mineral soil surface, an epipedon, and, directly below it, a horizon with one or both of the following:
- 50 percent or more hue of 2.5Y or yellower; or
- Chroma of 3 or less; or
- Within 50 cm of the mineral soil surface, enough active ferrous iron to give a positive reaction to alpha,alpha-dipyridyl at a time when the soil is not being irrigated.
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Other Oxisols that have an aridic moisture regime. |
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Other Oxisols that have an ustic or xeric moisture regime. |
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Other Oxisols that have a perudic moisture regime. |
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Other Oxisols. |
Source:
Keys to Soil Taxonomy, Eighth Edition. 1998.
Links:
> > Suborders
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