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Poquonock Soils

Soil Map Unit Description from the RI Soil Survey Report

PsA—Poquonock loamy fine sand, 0 to 3 percent slopes.

Link to Official Soil Series Description for Poquonock Soils

This nearly level, well drained to somewhat excessively drained soil is on crests of drumlins and hills. Areas are irregular in shape and range mostly from 3 to 40 acres.

Typically the surface layer is dark brown loamy fine sand about 8 inches thick. The subsoil is 20 inches thick. The upper 10 inches is dark yellowish brown loamy fine sand, and the lower 10 inches is light olive brown loamy sand. The substratum is dark gray and gray gravelly loam to a depth of 60 inches or more.

Included with this soil in mapping are small areas of excessively drained Windsor soils; well drained Broadbrook, Newport, and Paxton soils; and moderately well drained Birchwood 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 rapid in the surface layer and subsoil and slow to very slow in the substratum. Available water capacity is low, and runoff is slow. The soil is very strongly acid through medium acid.

This soil is suitable for community development but is limited by the slow or very slow permeability in the substratum. Onsite sewage disposal systems need special design and installation. Lawn grasses, shallow-rooted trees, and shrubs require watering in summer.

This soil is suited to trees, but most areas are cleared and used for farming. The main limitation for woodland is droughtiness. Seedling mortality is high during dry summers.

This soil is suited to farming. Irrigation is needed in dry seasons. Cover crops and the return of crop residue to the soil help to maintain tilth and organic matter content.

This soil is suited to woodland wildlife habitat and openland wildlife habitat. It is too dry to provide wetland wildlife habitat. Capability subclass IIs; woodland group 4s.

Soil Map Unit Description from the RI Soil Survey Report

PsB—Poquonock loamy fine sand, 3 to 8 percent slopes.

Link to Official Soil Series Description for Poquonock Soils

This gently sloping, well drained to somewhat excessively drained soil is on side slopes of drumlins and glacial till uplands. Areas are irregular in shape and range mostly from 5 to 100 acres.

Typically the surface layer is dark brown loamy fine sand about 8 inches thick. The subsoil is 20 inches thick. The upper 10 inches is dark yellowish brown loamy fine sand, and the lower 10 inches is light olive brown loamy sand. The substratum is dark gray and gray gravelly loam to a depth of 60 inches or more.

Included with this soil in mapping are small areas of excessively drained Windsor soils; well drained Broadbrook, Newport, and Paxton soils; and moderately well drained Birchwood soils. Also included are small areas of nearly level soils. Included areas make up about 10 percent of this map unit.

The permeability of this soil is rapid in the surface layer and subsoil and slow to very slow in the substratum. Available water capacity is slow, and runoff is medium. The soil is very strongly acid through medium acid.

This soil is suitable for community development. The main limitation for this use is the slow or very slow permeability in the substratum. Onsite sewage disposal systems need special design and installation. Lawn grasses, shallow-rooted trees, and shrubs require watering in summer. The use of straw bale sediment barriers and quickly establishing plant cover help to control erosion during construction.

This soil is suited to trees, but most areas are cleared and used for farming or openland wildlife habitat. Droughtiness is the main limitation for woodland. Seed ling mortality is high during dry summers.

This soil is suited to farming, but irrigation is needed. The hazard of erosion is moderate. The use of cover crops, diversions, and stripcropping and the return of crop residue to the soil help to control erosion and maintain tilth and organic matter content.

This soil is suited to woodland wildlife habitat and openland wildlife habitat. It is too dry to provide wetland wildlife habitat. Capability subclass IIs; woodland group 4s.

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