Term
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Definition
Called Epipedons; Includes upper part of soil darken by OM.
May be upper part of B, if darken by OM.
5 occur naturally. 2 by Human use. |
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Term
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Definition
(SOFT)
Dark color;
> 0.6 OM throughout;
thick horizon 25 cm;
Soft when dry;
High Bas Saturation > 50%
Typical under grasslands |
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Term
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Definition
SHADE;
Very similar to mollic;
Lower Base Saturation < 50%;
Develops where higher rainfall;
PM has lower Ca and Mg content. |
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Term
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Definition
(Pale)
Too low in OM to be either mollic or umbric;
Hard and massive when dry. |
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Term
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Definition
(Black)
Organic carbon content > 6%;
Characteristic of soils high in allophane;
Developed from volcanic ash;
> 30 cm thick;
light and fluffy. |
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Term
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Definition
(tissue)
20 - 60 cm thick layer of organic soil;
Formed in wet areas;
Layer of peat or muck with black or brown color;
Very low density;
Saturated at least 30 days in most years. |
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