Appling, Cecil, Hulett, Pacolet, and Wedowee soils have less than 30 percent silt in the control section. Cataula and Neeses soils have a layer that is partially dense and brittle. Chestatee soils have more than 15 percent by volume of coarse fragments throughout. Darley soils contain layers of fractured ironstone in the B horizon. Mahan soils formed in coastal plain sediments and have coarse fragments of ironstone.
Spotsylvania soils have a lithologic discontinuity.
Herndon soils are on gently sloping to moderately steep Piedmont Uplands. Slope gradients generally are 2 to 15 percent but range to 25 percent. The soil formed in residuum weathered from fine-grained metavolcanic rocks of the Carolina Slate Belt. The mean annual temperature ranges from 59 to 66 degrees F., the annual precipitation ranges from 37 to 60 inches, and the frost-free season ranges from 190 to 225 days. In addition to the competing Georgeville series, these are Alamance , Badin , Goldston , Gundy , Kirksey , Nanford , and Tarrus series.