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Surface Horizons
Epipedons
8
Science
Undergraduate 3
11/16/2010

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Cards

Term
Anthropic (A)
Definition
Human-modified mollic-like horizon, high in available P
Term
Folistic (O)
Definition
Organic horizon saturated for less than 30 days per normal year
Term
Histic (O)
Definition
Very high in organic content, wet during some part of the year
Term
Melanic (A)
Definition
Thick, black, high in organic matter (>6% organic C), common in volcanic ash soils
Term
Mollic (A)
Definition
Thick, dark-colored, high base saturation, strong structure
Term
Ochric (A)
Definition
Too light-colored, low organic content or thin to be Mollic; may be hard and massive when dry
Term
Plaggen (A)
Definition
Human-made sodlike horizon created by years of manuring
Term
Umbric (A)
Definition
Same as Mollic except low base saturation
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