LOCATION NARDMONT WAEstablished Series
TAXONOMIC CLASS: Fine-loamy, isotic, frigid Vitrandic Haploxeralfs
TYPICAL PEDON: Nardmont loam - under grand fir and Douglas-fir forest on a 58 percent east facing slope at an elevation of 2,440 feet. (Colors are for dry soil unless otherwise stated. When described the soil was moist)
Oi--2 to 0 inches; undecomposed forest litter.
A--0 to 2 inches; light brownish gray (2.5Y 6/2) loam, very dark grayish brown (2.5Y 3/2) moist; weak fine granular structure; slightly hard, friable, nonsticky and nonplastic; few fine and medium roots; few very fine irregular pores; 5 percent pebbles; slightly acid (pH 6.4); clear wavy boundary. (1 to 3 inches thick)
E--2 to 15 inches; light brownish gray (2.5Y 6/2) loam, very dark grayish brown (2.5Y 4/2) moist; weak medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; few fine roots; few very fine to large irregular pores; 5 percent pebbles; neutral (pH 7.0); clear wavy boundary. (12 to 15 inches thick)
Bt1--15 to 28 inches; dark grayish brown (2.5Y 4/2) loam, very dark grayish brown (2.5Y 3/2) moist; moderate medium subangular blocky structure; hard, firm, slightly sticky and plastic; few fine roots, few very fine and fine irregular pores; few thin clay films in pores and on faces of peds; 5 per;cent pebbles; neutral (pH 6.6); clear wavy boundary.
Bt2--28 to 47 inches; dark grayish brown (2.5Y 4/2) heavy loam, very dark grayish brown (2.5Y 3/2) moist; weak medium subangular blocky structure; hard, firm, slightly sticky and plastic; few fine and medium roots; few very fine and fine irregular and spherical pores; few thin clay films in pores and on faces of peds; 10 percent pebbles and 2 percent cobbles; slightly acid (pH 6.4); gradual wavy boundary. (Combined thickness of the Bt horizon is 22 to 40 inches)
BCt--47 to 60 inches; grayish brown (2.5Y 5/2) gravelly loam, very dark grayish brown (2.5Y 3/2) moist; weak medium subangular blocky structure; hard, firm, slightly sticky and plastic; few fine roots; few very fine and fine tubular pores; 10 percent pebbles; 5 percent cobbles; slightly acid (pH 6.2).
TYPE LOCATION: Chelan County, Washington; about 2 miles south of Winton; 1,100 feet east 1,300 feet north of southwest corner of sec. 32, T. 26 N., R. 17E.
RANGE IN CHARACTERISTICS: The average annual soil temperature at 20 inches ranges from 43 to 45 degrees F. These soils are usually moist but are dry in all parts of the moisture control section for 45 to 60 consecutive days following summer solstice. The upper 7 to 14 inches of the soil has an estimated moist bulk density of 1.15 to 1.35 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 particle-size control section averages 18 to 27 percent clay, 15 to 50 percent sand coarser than very fine sand, and 5 to 20 percent unweathered rock fragments. Base saturation is assumed to be about 35 percent in all parts. Reaction is slightly acid or neutral.
The A horizon has chroma of 2 or 3 dry or moist.
The E horizon has chroma of 2 or 3 dry or moist.
The Bt horizons have value of 4 or 5 dry and chroma is 2 or 3 moist or dry. Texture is loam, or gravelly loam.
The BCt horizon has hue of 2.5Y or 10YR, value of 4 or 5 dry and chroma of 2 to 6 dry or moist.
COMPETING SERIES: These are the McEwen, Nahahum and Panak series. McEwen soils are dry 60 to 80 days and have hue of 7.5YR or 5YR in the Bt horizon. Nardmont soils are dry for 60 to 75 consecutive days. Panak soils are dry for 60 to 75 days, lack an E horizon, and have hard and weathered basalt fragments in the particle-size control section.
GEOGRAPHIC SETTING: Nardmont soils are on mountainsides and have slopes of 3 to 65 percent. Nardmont soils formed in colluvium from schist mixed with volcanic ash and loess. Elevations are 2,000 to 4,000 feet. The soils are in a climate with warm, dry summers and cool, moist winters. The average annual precipitation is 40 to 50 inches. The mean January temperature is about 22 degrees F. Mean July temperature is about 62 degrees F, and the mean annual temperature is 41 to 43 degrees F. The growing season at 28 degrees F is 120 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Chumstick, Mountaineer and Nard soils. Chumstick soils are shallow. Mountaineer soils are skeletal. Nard soils are dry for 60 to 75 consecutive days and lack volcanic ash 7 to 14 inches thick.
DRAINAGE AND PERMEABILITY: Well drained; slow to very rapid runoff; moderate permeability.
USE AND VEGETATION: Woodland, wildlife habitat, recreation, and watershed. Native vegetation is grand fir, Douglas-fir and ponderosa pine with an understory of Oregon-grape, elk sedge, Rocky Mountain maple, and rose.
DISTRIBUTION AND EXTENT: East slopes of the Cascade Mountains in west central Chelan County, Washington. Series is of small extent.
SOURCE OF NAME: Name is coined.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Chelan County, Washington, 1985.
REMARKS: Diagnostic horizons and features recognized in this pedon are ochric epipedon from the surface to 2 inches, an albic horizon from 2 to 15 inches, and an argillic horizon from 15 to 60 inches. This descriptions reflects a change in classification due to Andisols from fine-loamy, mixed, frigid Ultic Haploxeralfs to fine-loamy, mixed, frigid Vitrandic Haploxeralfs.