LOCATION STATEMEADOW ID
Established Series
Rev: GAH-BDG-EMM
07/2013
STATEMEADOW SERIES
The Statemeadow series consists of very deep, well drained soils formed in reworked loess and material from basalt with a mantle of mixed loess and volcanic ash. They are on hills and terraces on plateaus. Permeability is moderately slow and slopes range from 5 to 40 percent. The average annual precipitation is about 33 inches and the average annual temperature is about 42 degrees F.
TAXONOMIC CLASS: Fine-silty, mixed, active, frigid Vitrandic Hapludalfs
TYPICAL PEDON: Statemeadow ashy silt loam - forested, on a 15 percent slope at 3,050 feet elevation. Aspect is south. (Colors are for dry soil unless otherwise noted.)
Oi--0 to 1 inch; slightly decomposed needles, twigs, leaves and grass. (0 to 3 inches thick)
A--1 to 2 inches; brown (7.5YR 5/4) ashy silt loam, dark brown (7.5YR 3/4) moist, moderate very fine and fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine and common medium roots throughout; many very fine and fine irregular pores; slightly acid (pH 6.2); abrupt smooth boundary. (0 to 10 inches thick)
Bw--2 to 9 inches; brown (7.5YR 5/4) ashy silt loam, brown (7.5YR 4/4) moist, moderate very fine, fine and medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine, common medium and few coarse roots; many very fine and common fine tubular, and many very fine irregular pores; slightly acid (pH 6.2); clear smooth boundary. (2 to 13 inches thick)
Bt1--9 to 14 inches; brown (7.5YR 5/4) silt loam, dark brown (7.5YR 3/4) moist; weak medium prismatic structure parting to moderate medium subangular blocky; hard, very friable, slightly sticky and slightly plastic; common very fine and few fine and medium roots; many very fine and few fine tubular, and few very fine irregular pores; few, distinct clay films lining pores; moderately acid (pH 6.0); clear wavy boundary.
Bt2--14 to 31 inches; light brown (7.5YR 6/4) silt loam, brown (7.5YR 4/4) moist; weak medium and coarse prismatic structure parting to moderate medium subangular blocky; hard, very friable, slightly sticky and slightly plastic; few very fine, fine and medium roots; many very fine, common fine and few medium tubular pores; common distinct clay films lining pores and few distinct clay films on faces of peds; moderately acid (pH 6.0). gradual wavy boundary. (Bt horizons 0 to 42 inches thick)
2Btx--31 to 51 inches; brown (7.5YR 5/4) silt loam, dark brown (7.5YR 3/4) moist; weak medium and coarse prismatic structure parting to moderate fine and medium subangular blocky; 60 percent extremely hard, brittle and 40 percent hard, friable, all is slightly sticky and slightly plastic; few very fine and fine roots; many very fine, common fine and medium and few coarse tubular pores; many prominent, strong brown (7.5YR 4/6) clay films lining pores and few prominent clay films on faces of peds; slightly acid, (pH 6.2); gradual wavy boundary. (12 to 25 inches thick)
2Bt--51 to 61 inches; brown (7.5YR 4/4) silty clay loam, dark brown (7.5YR 3/4) moist; moderate medium prismatic structure parting to moderate very fine, fine and medium subangular blocky; hard, firm, moderately sticky and moderately plastic; few very fine roots; common very fine and fine, and few medium and coarse tubular pores; many prominent, strong brown (7.5YR 4/6) clay films lining pores and few prominent clay films on faces of peds; slightly acid, (pH 6.2).
TYPE LOCATION: Clearwater County, Idaho; about 4.5 miles south and 0.5 miles east of Weippe, Idaho; about 500 feet south and 2,500 feet east of the northwest corner of sec. 11, T.34N., R.4E.; Latitude - 46 degrees, 18 minutes, 32 seconds North; Longitude - 115 degrees, 55 minutes, 18 seconds West. USGS Weippe South quadrangle.
RANGE IN CHARACTERISTICS:
Depth to weak fragic characteristics - 30 to 50 inches
Average annual soil temperature - 39 to 45 degrees F.
Frigid temperature regime.
Soil moisture control section - usually moist, dry for less than 45 consecutive days from June to October.
dic moisture regime.
Combined thickness of A and Bw horizons is greater than 7 inches (Vitrandic feature)
A horizon (when present)
Hue - 7.5YR or 5YR dry, 5YR to 10YR moist
Value - 4 or 5 dry, 3 or 4 moist
Chroma - 3 or 4 dry, 2 to 4 moist
Clay content - 8 to 19 percent
Volcanic glass content - 8 to 10 percent
Acid-oxalate extractable Al + 1/2 Fe - 0.4 to 0.8 percent
Reaction - very strongly acid to moderately acid
Bw horizon
Hue - 5YR or 7.5YR dry, 5YR to 10YR moist
Value - 4 to 6 dry, 3 to 5 moist
Chroma - 3 or 4 dry, 2 to 4 moist
Texture - ashy loam or ashy silt loam
Clay content - 16 to 25 percent
Rock fragments - 0 to 2 percent paragravel
Volcanic glass content - 8 to 10 percent
Acid-oxalate extractable Al + 1/2 Fe - 0.4 to 0.8 percent
Reaction - moderately acid to neutral
Bt horizons
Hue - 2.5Y to 5YR moist
Value - 4 to 6 dry and 3 to 6 moist
Chroma - 2 to 6 moist
Texture - silt loam, or silty clay loam
Clay content - 19 to 34 percent
Rock fragments - 0 to 2 percent gravel
Soft rock fragments - 0 to 20 percent paragravel
Reaction - strongly acid or moderately acid
2Bt and 2Btx horizons
Hue - 7.5YR or 10YR dry, 5YR to 10YR moist
Value - 4 to 6 dry, 3 to 7 moist
Chroma - 3 or 4 dry, 2 to 6 moist
Texture - silt loam, silty clay loam or silty clay
Clay content - 20 to 40 percent
Rock fragments - 0 to 2 percent gravel
Rock fragments - 0 to 15 percent paragravel
Consistence - 30 to 45 percent of horizon is brittle moist and extremely hard dry
Reaction - very strongly acid to slightly acid
2BC and 2C horizons (when present)
Hue - 7.5YR or 10YR moist
Value - 6 to 8 dry, 4 to 8 moist
Chroma - 1 to 3 dry, 1 to 4 moist
Texture - loam or clay loam
Clay content - 25 to 35 percent
Reaction - strongly acid to moderately acid
COMPETING SERIES:
Lynchlake (MT) - have a horizon of secondary calcium carbonate accumulation.
GEOGRAPHIC SETTING: Statemeadow soils are on hills and terraces on plateaus at elevations of 1,600 to 3,800 feet. These soils formed reworked loess and material from basalt with a mantle of loess and volcanic ash. The slope range is 5 to 40 percent. The average annual temperature is 38 to 44 degrees F. The average annual precipitation is 26 to 45 inches and the frost free season is 50 to 110 days (9 in 10 years to 1 in 10 years, respectively).
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Grangemont,
Kauder and the
Reggear series. Grangemont and Kauder soils are on similar positions and have 7 to 14 inches of volcanic ash on the surface. In addition, Kauder soils have a fragipan at 20 to 40 inches. Reggear soils are on similar positions and have a fragipan at 20 to 40 inches.
DRAINAGE AND PERMEABILITY: Well drained; runoff is medium and permeability is moderately slow.
USE AND VEGETATION: Used mainly for timber production, livestock grazing, wildlife habitat and watershed. Potential native vegetation is grand fir, Douglas fir, ponderosa pine, western larch, queencup beadlily, longtube twinflower, goldthread, starry false Solomons seal and common beargrass.
DISTRIBUTION AND EXTENT: North central Idaho; Statemeadow soils are not extensive. MLRA 43A.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Clearwater County, Idaho, 2003.
REMARKS: Diagnostic horizons and other features recognized in this pedon are:
Ochric epipedon - The zone from 0 to 2 inches (Oi and A horizons)
Vitrandic feature - The zone from 1 to 9 inches (A and Bw horizon)
Argillic horizon - The zone from 9 to 61 inches (Bt1, Bt2, 2Btx1 and 2Bt horizons)
Particle size control section - The zone from 9 to 29 inches (Bt1 and part of the Bt2 horizon)
National Cooperative Soil Survey
U.S.A.