Soils of the Southeastern U.S.: the BIG picture
Region 1: Blue Ridge & Piedmont
Inceptisols are heavily concentrated in the Blue Ridge & Piedmont region, where the steep topography and bedrock type encourage this type of soil formation. Also present within the region and throughout the entire Southeast are ultisols.
Region 2: Inland Basins
The Inland Basin is characterized by the abundance of alfisols, which are highly productive agricultural soils with high fertility. Ultisols, which possess low native fertility, are also present.
Region 3: Coastal Plain
Much of the Coastal Plain is dominated by the ultisols, but also present are spodosols (particulary within Florida), entisols, inceptisols, mollisols, histosols, alfisols, and vertisols.