Cartecay and Enoree soils are coarse-loamy. Chastain and Tawcaw soils are clayey. Chenneby soils are fine-silty. Congaree soils do not have a cambic horizon. Riverview soils are well drained, and Wehadkee soils are poorly drained.
Most areas flood frequently, but flooding frequency ranges from rare to frequent.
The remainder is in forest. Corn is the principal crop, and small grains and hay account for most of the remainder. Common trees in forested areas include yellow poplar, sweetgum, water oak, eastern cottonwood, green ash, blackgum, red maple, willow oak, and American sycamore. Loblolly pines are in some areas that are not subject to frequent flooding. Common understory plants include river birch, winged elm, hackberry, greenbrier, American holly, black willow, sourwood, eastern and hophornbeam.