Order:
[ ]
| Code |
Name |
Description |
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Entisols that have one or more of the following:
- Aquic conditions and sulfidic materials within 50 cm of the mineral soil surface; or
- Permanent saturation with water and a reduced
matrix in all horizons below 25 cm from the mineral soil surface; or
- In a layer above a densic, lithic, or paralithic contact or in a layer at a depth between 40 and 50 cm below the mineral soil surface, whichever is shallower, aquic conditions for some time in normal years (or artificial drainage) and one or more of the following:
- A texture finer than loamy fine sand and, in 50 percent or more of the matrix, one or more of the following:
- Chroma of 0; or
- Chroma of 1 or less and a color value, moist,
of 4 or more; or
- Chroma of 2 or less and redox concentrations;
or
- A texture of loamy fine sand or coarser and, in 50 percent or more of the matrix, one or more of the following:
- Chroma of 0; or
- Hue of 10YR or redder, a color value, moist,
of 4 or more, and chroma of 1; or
- Hue of 10YR or redder, chroma of 2 or less,
and redox concentrations; or
- Hue of 2.5Y or yellower, chroma of 3 or less,
and distinct or prominent redox concentrations;
or
- Hue of 2.5Y or yellower and chroma of 1; or
- Hue of 5GY, 5G, 5BG, or 5B; or
- Any color if it results from uncoated sand grains; or
- 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 Entisols that have, in one or more layers at a depth between 25 and 100 cm below the mineral soil surface, 3 percent or more (by volume) fragments of diagnostic horizons that are not arranged in any discernible order. |
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Other Entisols that have less than 35 percent (by volume) rock fragments and a texture of loamy fine sand or coarser in all layers (sandy loam lamellae are permitted) within the particle-size control section. |
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Other Entisols that do not have a densic, lithic, or paralithic contact within 25 cm of the mineral soil surface and have:
- A slope of less than 25 percent; and
- Either 0.2 percent or more organic carbon of Holocene age at a depth of 125 cm below the mineral soil surface or an irregular decrease in content of organic carbon from a depth of 25 cm to a depth of 125 cm or to a densic, lithic, or paralithic contact if shallower; and
- A soil temperature regime:
- That is warmer than cryic; or
- That is cryic and the soil has:
- No gelic material; and
- Either a slope of less than 5 percent or less than 15 percent volcanic glass in the 0.02 to 2.0 mm fraction in some part of the particle-size control section.
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Other Entisols. |
Source:
Keys to Soil Taxonomy, Eighth Edition. 1998.
Links:
> > Suborders
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