During parts of the year a temporary water table can be present at 3 to 6 feet for periods of less than 2 weeks. These soils are subject to flooding unless protected by levees. Some areas are partly leveled and cleared of young tree growth and are now cultivated. Corn and soybeans are usually grown. Native vegetation consisted of cottonwoods, elms, willows, and some hardwoods.
Many areas remain partly wooded.
They are of small extent. Total acreage in Iowa is about 9,000 acres. Jasper County, Illinois, 1928. Type location moved to Louisa County, Iowa, in 1987. Further study is needed to determine the range in sand size.