LOCATION NUBY                    WA

Established Series
Rev. RFP/SWH/JJR
02/2011

NUBY SERIES

The Nuby series consists of very deep, poorly drained soils that formed in alluvium from basic igneous and sedimentary rocks. Nuby soils are on floodplains below 100 feet elevation and have slopes less than 3 percent. The mean annual precipitation is about 90 inches and the mean annual air temperature is approximately 50 degrees F.

TAXONOMIC CLASS: Fine-silty, mixed, superactive, acid, isomesic Fluvaquentic Endoaquepts

TYPICAL PEDON: Nuby silt loam, pasture. (Colors are for moist soil unless otherwise noted.)

Ap--0 to 7 inches; grayish brown (10YR 5/2) silt loam, very pale brown (10YR 7/3) dry; common fine prominent yellowish red (5YR 5/8) redox concentrations moist and dry; moderate medium and fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many medium, fine and very fine roots; common medium and fine tubular pores; very strongly acid (pH 4.8); abrupt smooth boundary. (6 to 8 inches thick)

Bw1--7 to 17 inches; light brownish gray (10YR 6/2) silt loam, light gray (10YR 7/2) dry; many medium prominent yellowish red (5YR 5/6) redox concentrations moist, strong brown (7.5YR 5/8) dry; moderate medium and fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common medium and fine roots; common medium and fine tubular pores; very strongly acid (pH 4.8); gradual wavy boundary. (8 to 12 inches thick)

Bw2--17 to 60 inches; dark grayish brown (10YR 4/2) silt loam, light gray (10YR 7/2) dry; many medium distinct yellowish red (5YR 5/6) redox concentrations; reddish yellow (7.5YR 6/6) dry; weak medium prismatic structure parting to weak medium to fine subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; few fine roots; few medium and fine tubular pores; strongly acid (pH 5.2).

TYPE LOCATION: Wahkiakum County, Washington; 1,050 feet south and 600 feet east of NW corner section 9, T.10N., R.8W.

RANGE IN CHARACTERISTICS: The mean annual soil temperature is 47 to 52 degrees F. The difference between the mean summer and mean winter soil temperature is 5 to 9 degrees F. It is very strongly to strongly acid. Clay in the control section ranges from 18 to 35 percent.

The A horizon has value of 4 or 5 moist, 6 or 7 dry, and chroma of 2 or 3 moist.

The Bw horizon has value of 6 or 7 dry, and chroma of 2 or 3 moist and dry. It is silt loam and silty clay loam.

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: These soils are nearly level floodplains usually subject to stream overflow. Elevation ranges from 10 to 100 feet. The soils formed in medium and moderately fine textured alluvial deposits derived from basic igneous and sedimentary rocks. These soils occur in cool, coastal areas where the mean annual precipitation is 70 to 120 inches. The mean January temperature is 39 degrees F.; the mean July temperature is 60 degrees F.; and the mean annual temperature is about 50 degrees F. The frost free season is 160 and 200 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Grehalem, Hoh and Ocosta soils. Grehalem soils are well drained. Hoh soils are moderately well or well drained. Ocosta soils have 45 to 60 percent clay and are subject to tidal overflow.

DRAINAGE AND PERMEABILITY: Poorly drained; slow runoff; moderate permeability. These soils are subject to stream overflow.

USE AND VEGETATION: Most of these soils are cleared and used for production of pasture, hay, or silage crops. Areas not cleared have a forest cover of maple, alder, and hemlock with a dense understory of shrubs.

DISTRIBUTION AND EXTENT: Coastal floodplains of western Washington; MLRA 4A. The series is of small extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Mason County, Washington, 1941.

REMARKS: Diagnostic horizons and other features:
Ochric epipedon
Cambic horizon - 7 to 60 inches
The areas mapped as Nuby in Mason County, Washington will need to be re-correlated to a mesic soil.

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National Cooperative Soil Survey
U.S.A.