The Grayford series consists of deep, well drained soils formed in a thin layer of loess, and the underlying glacial till, and residuum from limestone on till plains.
Permeability is moderate.
Slopes range from 2 to 35 percent. Grayford silt loam on a 13 percent side slope in a pasture. 38 degrees 44 minutes 21 seconds N. and long. Depth to the base of the argillic horizon and a lithic contact ranges from 40 to 60 inches. Loess thickness ranges from 6 to 22 inches.