In most pedons, a thin pebble band is at the boundary between the two materials. Mean annual temperature ranges from about 45 to 49 degrees F, and mean annual precipitation ranges from about 30 to 34 inches. These are the competing Clyde soils and the Cresco, Kenyon, Protivin, and Riceville soils. Clyde soils formed in stratified materials overlying glacial till and are in drainageways below Jameston soils. Cresco, Kenyon, Protivin, and Riceville soils have browner B horizons and are on ridges and side slopes above Jameston soils.
Permeability is moderate in the loamy sediments and moderately slow in the glacial till.
Runoff is slow. Commonly cropped to corn, soybeans, and small grain where drained. Undrainged areas are in pasture. Native vegetation was grasses tolerant to excessive wetness. The series is of small extent.