Mean annual temperatures are between 45 and 57 degrees F. and mean annual precipitation is between 28 and 40 inches per year. Myrtle , Flagg , and Fayette soils commonly are on ridgetops above the Woodbine soils where the loess is thicker. Pecatonica and Westville soils are on similar landscape positions where the drift is thicker. Dubuque soils are associated in some places on steeper slopes or on similar slopes where glacial deposits do not occur above the bedrock. Woodbine is the light colored member of a biosequence containing Oneco and Hitt series.
Permeability is moderate in the loess and till and slow in the residuum.
Runoff is medium to rapid. Native vegetation was hardwood trees. Extent is moderate. Stephenson County, Illinois, 1969.