LOCATION HUSUM WAEstablished Series
TAXONOMIC CLASS: Ashy-skeletal over sandy or sandy-skeletal, amorphic over isotic, mesic Humic Vitrixerands
TYPICAL PEDON: Husum gravelly ashy loam - pasture on a 2 percent slope at an elevation of 380 feet. (Colors are for dry soil unless otherwise noted. All textures are apparent field textures.)
Oi--0 to 1 inch; needles, leaves, and twigs.
A--1 to 11 inches; brown (10YR 4/3) gravelly ashy loam, dark brown (7.5YR 3/2) moist; weak fine granular structure; soft, very friable, slightly sticky and nonplastic; weakly smeary; many very fine and common fine roots; many very fine irregular pores; 20 percent gravel and 10 percent cobbles; moderately acid (pH 6.0); clear smooth boundary. (8 to 15 inches thick)
Bw--11 to 29 inches; yellowish brown (10YR 5/4) very gravelly ashy loam, dark brown (7.5YR 3/4) moist; weak fine subangular blocky structure; soft, very friable, slightly sticky and nonplastic; weakly smeary; few very fine and fine roots; many fine irregular pores; 40 percent gravel and 15 percent cobbles; slightly acid (pH 6.1); clear wavy boundary. (15 to 25 inches thick)
2C--29 to 61 inches; yellowish brown (10YR 5/4) extremely cobbly loamy sand, dark brown (7.5YR 3/4) moist; single grain; loose, nonsticky and nonplastic; few very fine and fine roots; many very fine irregular pores; 50 percent gravel, 20 percent cobbles and 15 percent stones; moderately acid (pH 6.0)
TYPE LOCATION: Klickitat County, Washington; 950 feet north and 1,250 feet east of the southwest corner of section 35, T. 4 N., R. 10 E. Latitude 45 degrees, 47 minutes, 04 seconds N. and Longitude 121 degrees, 31 minutes, 07 seconds W.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 49 to 52 degrees F. The soil moisture control section is usually moist, but is dry for 45 to 60 consecutive days following summer solstice. The upper 24 to 36 inches of 0 to 40 inch particle-size control section has an estimated moist bulk density of 0.65 to 0.85 g/cc, volcanic glass content of 30 to 60 percent, acid oxalate extractable aluminum plus one-half iron of 1.0 to 2.0 percent, phosphate retention of 25 to 50 percent, and 15 bar water retention of 8 to 12 percent. The lower part has moist bulk density of 1.10 to 1.35 g/cc and volcanic glass content of 0 to 5 percent. Rock fragments in the control section averages from 45 to 85 percent. Depth to the 2C horizon is 24 to 36 inches.
The A horizon has hue of 5YR to 10YR and chroma of 2 to 6 dry and moist.
The Bw horizon has hue of 7.5YR or 10YR, value of 4 to 6 dry, 3 to 5 moist and chroma of 4 to 6 dry and moist. Texture is very gravelly ashy loam or extremely gravelly ashy loam. Reaction is slightly acid or moderately acid.
The 2C horizon has hue of 7.5YR or 10YR, value of 4 or 5 dry and 3 or 4 moist. Texture is extremely cobbly loamy sand, extremely gravelly loamy sand or extremely gravelly sandy loam.
COMPETING SERIES: There are no competing series. A similar soil is the Guler series. Guler soils lack sandy-skeletal material in the lower part of the particle-size control section and are dry for 75 to 90 consecutive days.
GEOGRAPHIC SETTING: Husum soils are on river terraces and alluvial fans at elevations of 350 to 800 feet. Slopes are 0 to 15 percent. Husum soils formed in volcanic ash over alluvium derived from basalt and andesite. Summers are warm and dry, winters are cool and wet. The mean annual precipitation is 35 to 45 inches. The average January temperature is 30 degrees F. and the average July temperature is 68 degrees F. The mean annual temperature is 47 to 50 degrees F. The frost-free season is 105 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Chemawa, Hood, and McGowan soils. Hood, and McGowan soils are fine-loamy. Chemawa soils have 10 to 30 percent shot-like aggregates in the surface and have 0 to 5 percent rock fragments.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; flooding is none to rare in early spring; moderate permeability in the A and Bw horizons and rapid in the 2C horizon.
USE AND VEGETATION: These soils are used mainly for timber production, livestock grazing, and haycrops. Native vegetation is Douglas-fir, ponderosa pine, and grand fir, with an understory of western hazel, vine maple, Oregon-grape, common snowberry, and trailing blackberry.
DISTRIBUTION AND EXTENT: Klickitat County, Washington; MLRA 6. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Klickitat County, Washington, 2003.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Umbric epipedon - the zone from 1 to 11 inches
Cambic horizon - the zone from 11 to 29 inches
Particle-size control section - the zone from 1 to 41 inches with the zone from 1 to 29 inches meeting the ashy-skeletal family, and the zone from 29 to 41 inches meeting the sandy-skeletal family.
Classification revised 11/07 from ashy-skeletal, amorphic to ashy-skeletal over sandy or sandy-skeletal, amorphic over isotic based on revision to Keys to Soil Taxonomy 10th Edition.
Depth to diagnostic horizons and features are measured from the top of the first mineral layer.
The mineralogy of this soil is based on laboratory data from the associated Guler soil.