This nearly level, poorly drained soil is in depressions and small
drainageways of terraces and outwash plains. Areas are irregular in shape and
range mostly from 2 to 70 acres.
Typically the surface layer is very dark brown sandy loam about 7 inches thick.
The subsoil is light brownish gray, mottled sandy loam 12 inches thick. The
substratum is dark yellowish brown and grayish brown, mottled gravelly sand to a
depth of 60 inches or more.
Included with this soil in mapping are small areas of moderately well drained
Sudbury soils and very poorly drained Scarboro soils. Also included are a few
small areas with a surface layer of silt loam. Included areas make up about 10
percent of this map unit.
The permeability of this soil is moderately rapid in the surface layer and
subsoil and rapid or very rapid in the substratum. Available water capacity is
moderate, and runoff is slow. This soil has a seasonal high water table at a
depth of about 6 inches from late fall through midspring. The soil is very
strongly acid through medium acid.
Most areas of this soil are in woodland. Some small areas are cleared and used
for pasture or wildlife habitat.
The seasonal high water table makes the soil poorly suited to community
development. Onsite septic systems need special design and installation, and
areas require extensive filling. Slopes of excavated areas are commonly
unstable. Roads and streets need careful design to prevent frost heaving.
This soil is suited to trees. The main limitation for woodland is wetness, and
tree windthrow is common.
The soil is suited to cultivated crops but is limited by the high water table.
Artificial drainage is needed. The use of cover crops and the return of crop
residue to the soil help to maintain tilth and organic matter content.
The soil is suited to most types of wildlife habitat. Capability subclass IIIw;
woodland group 4w.
Walpole soils are
HYDRIC soils associated with wetlands which are protected from disturbance
under state and Federal law. Any work done in or near this soil should be
conducted following the proper permit procedures.