The competing Unadilla soils are on adjacent landscapes that are level to strongly sloping. The moderately well drained Scio soil, and the poorly drained Raynham soil, and the very poorly drained Birdsall soil are in depressional areas on associated landscapes. Agawam , Enfield , Haven , Ninigret , Tisbury soils are on nearby terraces, but formed in loamy over sandy materials. Deerfield , Merrimac , and Windsor soils are also on nearby terraces, but formed in sandy or gravelly material. Hadley , Limerick , Occum , Pootatuck , Rippowam , Saco , and Winooski soils are on adjacent floodplains.
Permeability is moderate in the solum and moderate or moderately slow in the substratum.
Most areas are forested. Forests include sugar maple, red maple, beech, ash, black, yellow and white birches, white pine, and hemlock. The series is of small extent. Cheshire County, New Hampshire, 1985. Other features include a mesic soil temperature regime and a udic moisture regime.