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a horizon horizon that forms at or near the surface
formed during long-continued use of the soil by humans
organic epipedons that occur primarily in cool hmid regions of the world; saturated with water for less than 30 days a year
high content of organic matter as in Folistic, but normally saturated with water for more than 30 days a year
dark colored surface organic horizon associated with grasslands
thick, dark colored, humus-rich suface horizon with a base saturation of 50% or more. Bivalent cations (Ca++, Mg++) are dominant on the exchange complex. Formed by underground decomposition of organic residues such as roots of grasses
thin, light-colored organic horizon
human-made surface layer produced by long-continued manuraing
mineral soil material that is thick, dark colored, humus-rich, with less base sturation than Mollic epipedon
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