NRCS

The Doniphan series consists of very deep, well drained, moderately permeable soils formed in cherty sediments and residuum from clayey shales and cherty dolomite or cherty limestone on side slopes and narrow ridgetops. Slopes range from 2 to 60 percent. Mean annual temperature is about 56 degrees F, and mean annual precipitation is about 46 inches.

The Viraton series consists of very deep, moderately well drained soils that have a fragipan. They formed in loess and the underlying cherty residuum or colluvium from limestone. They are on broad ridges, foot slopes and strath terraces. The permeability is moderate above the fragipan, very slow in the fragipan and moderately slow below the fragipan. Slopes range from 1 to 20 percent. Mean annual temperature is 56 degrees F, and mean annual precipitation is 41 inches.

The Watershed Protection and Flood Prevention Act (PL 83-566), August 4, 1954, as amended, authorized NRCS to cooperate with States and local agencies to carry out works of improvement for soil conservation and for other purposes including flood prevention; conservation, development, utilization and disposal of water; and conservation and proper utilization of land.