Colvard and Rosman soils are well or moderately well drained and are on slightly higher parts of flood plains. French soils are in the same position on flood plains as Iotla soils. Toxaway soils are very poorly drained and are in low, wet parts of flood plains. Runoff class is negligible where nearly level and very low on gentle slopes. Flooding is common.
Important crops are corn for grain and silage, vegetables and fescue pasture.
Native forest species include yellow-poplar, eastern white pine, northern red oak, white oak, black oak, American sycamore, black walnut, white ash, river birch, American beech, black locust, basswood, and hemlock. A dense growth of rhododendron forms the understory in many places. Flood plains of the Southern Appalachian Mountains of North Carolina and possibly Georgia, South Carolina, Tennessee, and Virginia. The series is of moderate extent. The Iotla series would confine similar soils of Codorus series to regions other than MLRA 130.