Soil Map Unit Description from the RI Soil Survey Report
Bc—Birchwood sandy loam.
Official Soil Series Description for Birchwood Soils
This nearly level, moderately well drained soil is on the crests of
upland hills and drumlins and in transitional positions between up lands and
outwash terraces. Areas are irregular in shape and mostly range from 6 to 30
acres. Slopes range from 0 to 3 percent.
Typically the surface layer is dark brown sandy loam about 10 inches thick.
The subsoil is 14 inches thick. It is yellowish brown loamy sand that is mottled
in the lower part. The substratum is very firm, black gravelly sandy loam to a
depth of 60 inches or more.
Included with this soil in mapping are small areas of well drained Poquonock,
Newport, and Paxton soils; moderately well drained Woodbridge and Pittstown
soils; and poorly drained Stissing soils. Also included are small areas of soils
that have slopes of more than 3 percent. Included areas make up about 10 percent
of this map unit.
The permeability of this soil is moderately rapid in the surface layer, rapid
in the subsoil, and slow or very slow in the substratum. Available water
capacity is low, and runoff is slow. This soil has a seasonal high water table
at a depth of about 20 inches from late fall through midspring. The soil is very
strongly acid through medium acid.
Wetness and the slow or very slow permeability of the substratum limit this
soil for community development. Onsite septic systems need special design and
installation, If suitable outlets are available, subsurface drains help prevent
wet basements. Lawn grasses, shallow- rooted trees, and shrubs require watering
in summer. Roads and streets on this soil need special design to prevent frost
Many areas of this soil are farmed, a use to which it is suited. Wetness is
the main limitation. The soil dries out and warms up slowly in the spring, and
artificial drainage is needed, but irrigation is necessary in dry seasons. The
use of cover crops and the return of crop residue to the soil help to maintain
tilth and organic matter content.
This soil is suited to trees, woodland wildlife habitat, and openland
wildlife habitat. It is too dry to provide wetland wildlife habitat. Capability
subclass IIw; wood land group 4o.