Humic Mesisol (HU.M)
Common horizon sequence: Of, Om or Oh, Om, Oh, Om
Soils of this subgroup have the general properties specified for the Organic order and the Mesisol great group. They differ from Typic Mesisols by having a subdominant humic layer thicker than 25 cm in the middle or bottom tiers. They may also have a subdominant fibric layer.
Note: Diagnostic horizons are underlined.