The soil is formed in residuum from siltstone. Mean annual precipitation ranges from 25 to 35 inches, and mean annual temperature ranges from 57 to 62 degrees F. Thornthwaite Annual P-E Index ranges from 44 to 60. The competing Grant and Pond Creek soils are on similar topography, but in areas where the regolith is thicker. Lucian and Quinlan soils are associated in areas where the regolith is less than 20 inches thick and on more sloping topography. Runoff is medium to rapid.
Permeability is moderate.
Sorghums and alfalfa are grown to a lesser extent. Native vegetation is tall and mid prairie grasses. South central Kansas and adjacent parts of Oklahoma. The series is of moderate extent. The Nashville series comprises the fine- silty portion of the previous concept of the Nash series.