LOCATION NEWHORN WAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, isotic, frigid Andic Haploxerepts
TYPICAL PEDON: Newhorn ashy fine sandy loam, on a north northeast-facing 28 percent slope at 4,200 feet elevation in a Douglas-fir and western larch forest. (Colors are for dry soil unless otherwise stated. All textures are apparent field textures.)
Oe--0 to 1 inch; moderately decomposed needles and twigs; abrupt smooth boundary. (1 to 3 inches thick)
A--1 to 5 inches; brown (10YR 5/3) ashy fine sandy loam, brown (10YR 4/3) moist; weak fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine and fine, and few medium and coarse roots; common very fine and fine pores; 5 percent gravel; neutral (pH 6.8); clear smooth boundary. (3 to 6 inches thick)
Bw--5 to 14 inches; light yellowish brown (10YR 6/4) ashy fine sandy loam, dark yellowish brown (10YR 4/4) moist; weak fine and medium subangular blocky structure; soft, very friable, nonsticky, nonplastic and moderately smeary; many very fine and fine, and few medium and coarse roots; common very fine and fine pores; 5 percent gravel and 3 percent cobbles; neutral (pH 6.8); clear wavy boundary. (4 to 10 inches thick)
2CB--14 to 29 inches; light brownish gray (10YR 6/2) very gravelly sandy loam, grayish brown (10YR 5/2) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine and fine and few medium roots; common very fine and fine pores; 30 percent gravel and 5 percent cobbles; neutral (pH 7.0); gradual wavy boundary. (9 to 16 inches thick)
2C--29 to 37 inches; very pale brown (10YR 7/3) very gravelly sandy loam, brown (10YR 5/3) moist; massive; hard, friable, nonsticky and slightly plastic; few very fine roots; common very fine and fine pores; 35 percent gravel and 10 percent cobbles; neutral (pH 7.0); gradual wavy boundary. (4 to 12 inches thick)
2Cd--37 to 61 inches; very pale brown (10YR 7/3) very gravelly sandy loam, brown (10YR 5/3) moist; massive, very hard, friable, slightly sticky and slightly plastic; few very fine roots; few very fine and fine pores; 35 percent gravel and 5 percent cobbles; neutral (pH 7.0).
TYPE LOCATION: Okanogan County, Washington; about 7 miles west northwest of Conconully, WA, about 2,200 feet west and 1,300 feet north of the southeast corner of section 30, T. 36 N., R. 24 E. (Latitude 48 degrees, 35 minutes, 12 seconds N., Longitude 119 degrees, 52 minutes, 20 seconds W.)
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 42 to 46 degrees F. These soils are usually moist but are dry in all parts of the moisture control section for 60 to 75 days following the summer solstice. The solum and volcanic ash mantle ranges from 7 to 14 inches thick with an estimated bulk density 0.65 to 0.90 g/cc, volcanic glass content of 30 to 60 percent, acid-oxalate extractable aluminum plus one-half of the acid-oxalate extractable iron of 1.0 to 2.0 percent, and 15-bar water retention of 5 to 12 percent. The particle-size control section averages 35 to 50 percent rock fragments and 5 to 15 percent clay. Depth to densic glacial till ranges from 20 to 40 inches. Reaction ranges from slightly acid to neutral.
The A horizon has value of 3 or 4 moist, and chroma of 2 or 3 dry or moist.
The Bw horizon has chroma of 3 or 4 dry or moist. It is ashy fine sandy loam or gravelly ashy fine sandy loam. It has 0 to 15 percent gravel and 0 to 5 percent cobbles.
The 2CB horizon has value of 5 or 6 dry, 4 or 5 moist, and chroma of 2 to 4 dry or moist. It is very gravelly sandy loam or very gravelly fine sandy loam. It has 25 to 40 percent gravel and 0 to 10 percent cobbles.
The 2C horizon has hue of 2.5Y or 10YR, value of 6 or 7 dry, 5 or 6 moist, and chroma of 2 or 3 dry or moist. It is very gravelly sandy loam or very cobbly sandy loam. It has 20 to 40 percent gravel and 5 to 15 percent cobbles.
The 2Cd horizon has hue of 2.5Y or 10YR, value of 6 or 7 dry, and 5 or 6 moist, and chroma of 2 or 3 dry or moist. It is very gravelly sandy loam or very cobbly sandy loam. It has 25 to 45 percent gravel and 5 to 15 percent cobbles.
COMPETING SERIES: These are the Belzar, Bertolotti, Cliffdell (T), Hartill, Illabot, Inkler, Kloochman, McCree, Newbell, Ohscow, Oxerine, Redriver, Scotties (T), Talls, Threemile, Veridge, Wilma and Wilmont series. Belzar, Hartill, Huntrock, Kloochman, Oxerine, and Wilma soils have a lithic contact at 20 to 40 inches. Bertolotti soils lack a 2Cd horizon and are moderately to strongly acid. Scotties soils lack a 2Cd horizon. Cliffdell soils have a solum more than 30 inches thick. Illabot soils have a paralithic contact at 20 to 40 inches. Inkler soils lack a 2Cd horizon and have 15 to 50 percent gravel in the Bw horizon. McCree soils are 40 to 60 inches to bedrock. Newbell soils are dry in all parts of the moisture control section for 45 to 60 consecutive days following the summer solstice. Talls soils have clay bands in the 2A and 2B horizons. Threemile soils have free carbonates in the lower part of the control section. Ohscow soils lack a 2Cd horizon, have 35 to 70 angular granitic rock fragments and 2 to 8 percent clay in the particle-size control section. Redriver soils have a lithic contact at 20 to 40 inches and are dry for 90 consecutive days. Veridge and Wilma soils are 20 to 40 inches to lithic contact. Wilmont soils are dominated by channer rock fragments and are very channery or extremely channery in the particle-size control section.
GEOGRAPHIC SETTING: Newhorn soils are on backslopes and footslopes of mountains and have slopes of 15 to 35 percent. These soils formed glacial till from granitic with a mantle of volcanic ash 7 to 14 inches thick. Elevations are 3,300 to 4,800 feet. The climate is characterized by warm, dry summers and cool, moist winters. The average annual precipitation is 20 to 24 inches. The mean January temperature is 22 to 26 degrees F, the mean July temperature is 62 or 67 degrees F, and the average annual temperature ranges from 40 to 44 degrees F. The frost-free season is 90 to 115 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Merkel, Myerscreek, and Neuske soils. Merkel and Myerscreek soils are on toeslopes, footslopes, and backslopes of mountains. Merkel soils are vitrandic. Myerscreek soils have a cryic temperature regime. Neuske soils are on till plains, and on backslopes and footslopes of mountains. Neuske soils are vitrandic and have argillic horizons.
DRAINAGE AND PERMEABILITY: Well drained, medium to rapid runoff; moderate over slow permeabilty.
USE AND VEGETATION: This soil is used for timber production, wildlife habitat, watershed, recreation, and livestock grazing. Native vegetation is Douglas-fir, western larch, ponderosa pine and lodgepole pine with an understory of pinegrass, shinyleaf spirea, strawberry, kinnikinnik, silky lupine, Saskatoon serviceberry, and dwarf huckleberry.
DISTRIBUTION AND EXTENT: Okanogan County, Washington. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Okanogan National Forest, Okanogan County, Washington, 2005.
REMARKS: Diagnostic horizons and features in this pedon include:
Ochric epipedon
Cambic horizon - 5 to 14 inches (Bw horizon)
PSCS - 11 to 37 inches (part of the Bw, 2CB, 2C) The zone from 11 to 14 inches is ashy and from 14 to 37 is loamy-skeletal. The control section is not contrasting because the ashy part is 3 inches thick and this material needs to be 4 or more inches thick for pedon to be strongly contrasting; thus the thickest part is used which is loamy-skeletal.
Andic properties from 1 to 14 inches.