Orthic Humic Regosol (O.HR)

Common horizon sequence: Ah, C

These soils have the properties specified for the Regosolic order and the Humic Regosol great group. They are identified by the following properties:

1. They have an Ah or dark-colored Ap horizon at least 10 cm thick.
2. They have no B horizon or the B horizon is less than 5 cm thick.
3. They have a low content of organic matter throughout the control section below the A horizon; this is reflected in a uniform color with differences of Munsell color value of less than one unit between layers.
4. They lack faint to distinct mottling that indicates gleying within the upper 50 cm.

Note: Diagnostic horizons are underlined.

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