The soils become Ustults
in the middle-mountain forest (MF) of 800-1600 m a.s.1., which is covered with broad-leaved coniferous mixed forest, including Quercus glandulifera, Brevipetiolata spp., Castanea mollissima, Carpinus fargesiana, Rhododendron spp., and Ilex spp.
In the USDA Soil Taxonomy (Soil Survey Staff 2006), these soils would correspond to Alfisols (Xeralfs and to a lesser extent Aqualfs and Ustalfs) for the higher base status soils, and Ultisols (Ustults
and to a lesser extent Aquults and Xerults) for the more acidic, lower base status soils.
The dominant suborders of Ultisols are Aquults, Humults, Udults, Ustults
, and Xerults (Table 3-5).