LOCATION HADENCREEK WAEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, frigid Vitrandic Haploxerolls
TYPICAL PEDON: Hadencreek ashy silt loam - on a 1 percent slopes, at 3,510 feet elevation under small grains. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 13 inches; grayish brown (10YR 5/2) ashy silt loam, very dark grayish brown (10YR 3/2) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and few fine roots; common very fine tubular pores; neutral (pH 7.0); abrupt smooth boundary. (10 to 16 inches thick)
Bw1--13 to 18 inches; pale brown (10YR 6/3) silt loam, brown (10YR 4/3) moist; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine roots; common very fine tubular pores; slightly alkaline (pH 7.4); clear irregular boundary.
Bw2--18 to 32 inches; pale yellow (2.5Y 7/3) silt loam, light olive brown (2.5Y 5/3) moist; moderate fine angular blocky structure; hard, friable, slightly sticky and slightly plastic; common very fine roots; common very fine tubular pores; slightly alkaline (pH 7.4); clear wavy boundary. (Combined thickness of the Bw horizon is 10 to 23 inches.)
Bk1--32 to 40 inches; pale yellow (2.5Y 7/3) silty clay loam, light olive brown (2.5Y 5/3) moist; varved; hard, firm, moderately sticky and moderately plastic; few very fine roots; few very fine tubular pores; strongly effervescent, lime segregated in common irregularly shaped fine-sized seams; moderately alkaline (pH 8.0); clear wavy boundary. (8 to 20 inches thick)
Bk2--40 to 60 inches; light gray (2.5Y 7/2) silt loam, grayish brown (2.5Y 5/2) moist; varved; slightly hard, friable, moderately sticky and moderately plastic; few very fine tubular pores; slightly effervescent, lime segregated in few irregularly shaped fine-sized seams and filaments; slightly alkaline (pH 7.8).
TYPE LOCATION: Colville Indian Reservation, Okanogan County, Washington; about 7 miles northeast of the town of Disautel; 1,950 feet north and 1,750 feet west of the southeast corner of sec. 25, T. 34 N., R. 29 E., W.M.
RANGE IN CHARACTERISTICS: The mean annual soil temperature at a depth of 20 inches ranges from 44 to 46 degrees F. These soils are usually moist but are dry in all parts between depths of 4 and 12 inches for 60 to 75 consecutive days following the summer solstice. The solum thickness and depth to secondary carbonates is 20 to 36 inches. The upper 7 to 14 inches has an estimated moist bulk density of 1.30 to 1.40 g/cc, volcanic glass content of 5 to 20 percent, acid-oxalate extractable aluminum plus one-half of the acid-oxalate extractable iron of 0.4 to 1.0 percent, and 15-bar water retention of 5 to 10 percent for air dried samples. The control section averages 18 to 27 percent clay and is less than 15 percent fine sand or coarser material.
The A horizon has value of 4 or 5 dry, 2 or 3 moist, and chroma of 2 or 3 dry or moist.
The Bw horizon has hue of 10YR or 2.5Y, value of 5 through 7 dry, 3 through 5 moist, and chroma of 2 or 3 dry or moist. Reaction is neutral or slightly alkaline.
The Bk horizon has hue of 10YR or 2.5Y, value of 6 or 7 dry, 4 or 5 moist, and chroma of 2 or 3 dry or moist. It is silt loam or silty clay loam. Reaction is slightly alkaline or moderately alkaline. The calcium carbonate equivalent is 5 to 10 percent.
Some pedons have a C horizon. It has hue of 2.5Y, value of 6 through 8 dry, 4 through 6 moist, and chroma of 2 or 3 dry or moist. It is silt loam or silty clay loam and commonly has lenses of very fine sandy loam within the varves. Reaction usually is slightly alkaline.
COMPETING SERIES: This is the Topper series. Topper soils have 30 to 60 percent volcanic glass and less than 0.1 percent acid oxalate extractable Al plus one half the Fe in the A horizon. Topper soils are well drained.
GEOGRAPHIC SETTING: Hadencreek soils are on glacial lake terraces and basins and formed in glacial lake sediments with a component of loess and volcanic ash. Slopes are 0 to 8 percent. Elevations range from 1,700 to 3,600 feet. The climate is characterized by warm, dry summers and cold, moist winters. The average annual precipitation is 16 to 18 inches. The mean January temperature is about 22 degrees F, mean July temperature is about 64 degrees F, and the mean annual air temperature about 43 degrees F. The frost-free season is 90 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Donavan, Loony (T), Louploup (T), Martella, Nevine, Republic, Ret, Sanpoil (T), and Torboy soils. Donavan, Republic, Ret, and Sanpoil soils are coarse-loamy. Loony and Louploup soils are ashy over loamy. Martella soils have an argillic horizon. Nevine soils are ashy over loamy-skeletal. Torboy soils are sandy. Loony, Louploup, Martella, Nevine, and Torboy soils lack a mollic epipedon. Also Sanpoil soils hae an aquic moisture regime. Donavan soils are mesic. Also, all of the above soils lack an accumulation of secondary carbonates in the lower subsoil.
DRAINAGE AND PERMEABILITY: Moderately well drained; slow to medium runoff; moderately slow permeability.
USE AND VEGETATION: Hay and pasture, small grain cropland, grazing, wildlife habitat, and watershed are the principal uses. Current vegetation includes mountain big sagebrush, vetch, and shrubby cinquefoil. Potential overstory may be Douglas-fir, lodgepole pine, ponderosa pine, and western larch. Potential understory may be pinegrass, kinnikinnick, common snowberry, white spiraea, ceanothus, creambrush oceanspray, mallow ninebark, Oregon-grape, Saskatoon serviceberry, woods rose, and strawberry.
DISTRIBUTION AND EXTENT: Northcentral Washington. The series is of very small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Colville Indian Reservation, Okanogan County, Washington, 1987.
REMARKS: Diagnostic horizons and features recognized in this soil are a mollic epipedon from the surface to 13 inches, a cambic horizon from 13 to 32 inches, and an accumulation of soft, powdery secondary lime in the lower subsoil.