Metea and Seward soils have a higher content of clay in their argillic horizons and do not have eolian silty deposits in the lower part of the solum. Okee and Richford soils have a higher content of sand coarser than very fine in the argillic horizon. Ormas soils contain less silt and formed in outwash deposits. Anoka soils are coarse-loamy and frigid. Backbone and Crocker soils have dark A horizons greater than 7 inches thick.
Tustin soils are similar but the lower part of the solum contains more clay.
Puchyan soils are on uplands and stream terraces. In association with soils formed in glacial till, they occupy short slopes. Slope gradients commonly are 2 to 6 percent with an extreme range of 2 to 12 percent. Puchyan soils formed in 20 to 40 inches of sandy eolian deposits and in the underlying silty and loamy deposits, which, in turn, is underlain by loam glacial till. Mean annual temperature ranges from 45 to 53 degrees F, and mean annual precipitation ranges from 28 to 32 inches.