The Nickerson series consists of very deep, moderately well drained, moderately permeable soils that formed in old alluvium. Slope ranges from 0 to 2 percent. Nickerson loamy fine sand in a cultivated field. All these series except Zellmont have a lower mean annual soil temperature and lower mean annual precipitation.
Zellmont soils are underlain by permian shale.
These are the Carbika and Naron soils. The somewhat poorly drained Carbika soils have a fine textured argillic horizon and are in slightly lower positions on the landscape. The well drained Naron soils have a mollic epipedon, are deeper to free carbonates, and are in slightly higher positions on the landscape. Moderately well drained. Runoff is low.