The Meridian series consists of very deep, well drained soils which are moderately deep to sandy outwash. They formed dominantly in loamy alluvium underlain by sandy outwash on lake terraces and outwash terraces of valley trains.
Permeability is moderate in the loamy alluvium and rapid or very rapid in the sandy outwash.
Slopes range from 0 to 20 percent. Mean annual precipitation is about 30 inches. Thickness of the loamy alluvium and depth to sandy outwash ranges from 20 to 40 inches. Depth to the base of the argillic horizon ranges from 20 to 45 inches. The weighted average clay content in the upper part of the particle-size control section ranges from 18 to 27 percent.