LOCATION DOTY WA
Established Series
Rev. MEH/WRF/JJR
06/2011
DOTY SERIES
The Doty series consists of very deep, well drained soils that formed in silty and gravelly alluvium weathered from basic igneous and sedimentary rocks. Doty soils are on old stream terraces and have slopes of 0 to 3 percent. The mean annual precipitation is about 60 inches and the mean annual air temperature is about 52 degrees F.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Pachic Humixerepts
TYPICAL PEDON: Doty silt loam - pasture. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 6 inches; very dark brown (10YR 2/2) silt loam, dark yellowish brown (10YR 4/4) dry; strong medium, fine and very fine subangular blocky structure; soft, very friable, slightly sticky and nonplastic; many fine and very fine roots; many very fine interstitial pores; 5 percent gravel; slightly acid (pH 6.2); abrupt smooth boundary. (0 to 7 inches thick)
A--6 to 16 inches; very dark brown (10YR 2/2) silt loam, dark yellowish brown (10YR 4/4) dry; strong medium and fine subangular blocky structure that parts to strong very fine subangular blocky; soft, very friable, slightly sticky and slightly plastic; many fine and very fine roots; common fine and very fine tubular pores and very fine interstitial pores; 5 percent gravel; moderately acid (pH 6.0); clear wavy boundary. (7 to 13 inches thick)
Bw1--16 to 33 inches; very dark brown (10YR 2/2) silty clay loam, dark yellowish brown (10YR 4/4) dry; strong coarse and medium subangular blocky structure that parts to fine and very fine subangular blocky; slightly hard, very friable, slightly sticky and slightly plastic; common very fine roots; common fine and very fine tubular pores; 5 percent gravel; moderately acid (pH 6.0); gradual wavy boundary. (10 to 20 inches thick)
Bw2--33 to 60 inches; dark yellowish brown (10YR 3/4) silty clay loam, yellowish brown (10YR 5/6) dry; weak very coarse and coarse subangular blocky structure that parts to medium and fine subangular blocky; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; many fine and very fine tubular pores; 10 to 15 percent gravel; slightly acid (pH 6.5).
TYPE LOCATION: Lewis County, Washington; about 1/2 mile north of PeEll; 600 feet west, 200 feet south of the center of the southeast 1/4 of section 27. T. 13 N., R. 5 W.
RANGE IN CHARACTERISTICS: Doty soils are usually moist, but are dry in all parts between depths of 4 and 12 inches for more than 60 consecutive days within the 3 months following the summer solstice. Mean annual soil temperature is 47 to 53 degrees F. The control section is dominantly silty clay loam with 27 to 35 percent clay and 15 percent or more fine sand or coarser. These soils are slightly or moderately acid. Hue is 10YR or 7.5YR. The umbric epipedon is 20 to 40 inches thick.
The A horizon has value of 2 or 3 moist, 4 or 5 dry, and chroma of 1 through ?
The B horizon has value of 3 or 4 moist, 5 or 6 dry, and chroma of 4 through 6 moist or dry.
COMPETING SERIES: This is the
Germany series. Germany soils have 2 to 25 percent soft concretions in the A and upper B horizons and have less than 18 percent clay.
GEOGRAPHIC SETTING: Doty soils are on nearly level old stream terraces at elevations of 250 to 450 feet. They formed in silty alluvium and gravel and weathered from basic igneous and sedimentary rocks. Doty soils occur in a marine type climate with 50 to 70 inches annual precipitation occurring mostly as rain during the winter. Mean January temperature is 38 degrees F., mean July temperature is 65 degrees F., and the mean annual temperature is 52 degrees F. The frost-free season is about 150 to 200 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Galvin,
Klaber,
Lacamas, and
Olequa soils. Galvin soils are somewhat poorly drained; Lacamas and Klaber are poorly drained. Olequa soils have umbric epipedons less than 20 inches thick.
DRAINAGE AND PERMEABILITY: Well drained; slow runoff; moderate permeability in the A and upper B horizons and moderately slow in the lower B horizon.
USE AND VEGETATION: Natural vegetation is grasses and ferns. Present use includes production of hay, grain, and pasture. Most of the Doty soils are cultivated.
DISTRIBUTION AND EXTENT: Southwest Washington. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Lewis County, Washington, 1941.
National Cooperative Soil Survey
U.S.A.