Dunbridge and Winneshiek have a lithic contact at depths less than 40 inches. Waucoma soils lack hue of 5YR or redder in one or more horizons above the residuum. Oneco soils are on gently undulating to rolling till plains and moraines which are partially controlled by underlying limestone bedrock. Slope gradients range from 1 to 12 percent. These soils formed in Late Sangamon paleosols formed in sandy loam, loam or clay loam Illinoian glacial till and residuum from weathered limestone bedrock, except the upper 10 to 15 inches above the IIB is formed in loess.
Summers are hot and winters are cold.
Mean annual temperature is between 45 and 57 degrees F, and mean annual precipitation ranges from 28 to 40 inches. Woodbine and Hitt are the closest associates. Oneco soils generally are between Woodbineand Hitt soils in the landscape. Oneco soils generally are between Woodbine and Hitt soils in the landscape. Oneco is the intermediate member of a biosequence in which Hitt is the dark colored member and Woodbine the light colored member.