The Port Byron series consists of deep, well drained and moderately well drained soils formed in loess on uplands and high terraces.
Permeability is moderate in the solum and moderate or rapid in the substratum.
Slopes range from 0 to 30 percent. Mean annual temperature is about 48 degrees F, and mean annual precipitation is about 31 inches. The solum is 42 to more than 60 inches in thickness. The mollic epipedon is 10 to 24 inches in thickness. It is medium acid to moderately alkaline, depending upon past liming practices.