The Louin series consists of deep somewhat poorly drained soils that formed in clayey material in uplands and stream terraces of the Blackland Prairie Major Land Resource Area.
Permeability is very slow.
These are nearly level soils on broad slopes that have gilgai microrelief. Slopes range from 0 to 2 percent. Depth to the C horizon ranges from 38 to 60 inches or more. Depth to intersecting slickensides ranges from 14 to 38 inches. Surface configuration in undisturbed areas is a succession of microbasins and microknolls that is repeated at intervals of 7 to 18 feet.