They have red subsoil layers overlying chalk. They are acid and are somewhat poorly drained or poorly drained. These clayey soils contain a high percentage of smectitic clays and they shrink and crack when dry and swell when wet. The area is level to undulating. Elevation is about 200 feet.
Soybeans is the main crop.
Most of these soils are used for timber production and pasture. The soils are not extensive but important where they are found along streams and rivers. They are derived from alluvium deposited by the streams. The Cahaba, Annemaine, and Urbo series represent major soils of this area. A typical area consists of cultivated crops on the nearly level terraces and bottomiand hardwood forests on the floodplain of streams.