The Sebbo series consists of very deep, moderately well drained soils formed in loamy and silty colluvium on valley sides in bedrock controlled uplands.
Permeability is moderate.
Slopes range from 1 to 6 percent. Mean annual precipitation is about 30 inches. Sebbo loam - on a northwest facing concave 4 percent slope in a cultivated field at an elevation of about 820 feet. Depth to the base of the argillic horizon ranges from 40 to 80 inches or more. Total sand content in any part of the control section is 52 percent or less.