The Marengo series consists of very deep, very poorly drained soils formed loamy till on Wisconsinan age till plains.
Permeability is moderate or moderately slow.
Slope ranges from 0 to 2 percent. Mean annual air temperature is about 51 degrees F., and mean annual precipitation is about 36 inches. 39 degrees 48 minutes 02 seconds N., and long. 82 degrees 39 minutes 48 seconds W., NAD 83. Solum thickness ranges from 40 to 75 inches.