Alfisols form in semiarid to humid areas that have a clay enriched and nutrient enriched subsoil (argillic horizon).Alfisol They commonly have a mixed vegetative cover but were dominantly forested soils. Alfisols have the potential to be very productive if conserved, but can also degrade rapidly if eroded.
Alfisols form under forest vegetation where the parent material has undergone significant weathering. These soils are quite widespread in their distribution and are found from southern Florida to northern Minnesota. The most distinguishing characteristics of this soil type are the illuviation of clay in the B horizon, moderate to high concentrations of base cations, and light colored surface horizons.