LOCATION DOOWAK NV
Established Series
Rev: CEJ/GJS/JBF
02/2016
DOOWAK SERIES
The Doowak series consists of very deep, excessively drained soils that formed in alluvium derived from mixed rocks. These soils are on inset fans. Slopes are 0 to 2 percent. The mean annual precipitation is about 200 mm and the mean annual temperature is about 9 degrees C.
TAXONOMIC CLASS: Sandy-skeletal, mixed, mesic Xeric Torriorthents
TYPICAL PEDON: Doowak very gravelly loamy sand--rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 15 cm; grayish brown (10YR 5/2) very gravelly loamy sand, very dark grayish brown (10YR 3/2) moist; moderate medium and thick platy structure; soft, very friable, nonsticky and nonplastic; common fine and few very fine roots; many very fine vesicular pores; 40 percent gravel; slightly alkaline (pH 7.6); abrupt smooth boundary. (10 to 15 cm thick)
Bw--15 to 46 cm; grayish brown (10YR 5/2) extremely gravelly sand, very dark grayish brown (10YR 3/2) moist lithochromic colors; single grained; loose, nonsticky and nonplastic; common fine and few medium roots; many very fine interstitial pores; 65 percent gravel; moderately alkaline (pH 8.0); clear smooth boundary. (25 to 64 cm thick)
Bk1--46 to 84 cm; grayish brown (10YR 5/2) extremely gravelly loamy sand, very dark grayish brown (10YR 3/2) moist lithochromic colors; single grained; loose, nonsticky and nonplastic; common very fine and fine roots; many very fine interstitial pores; 70 percent gravel; very thin carbonate coatings on undersides of gravel; slightly effervescent; moderately alkaline (pH 8.0); gradual smooth boundary. (25 to 38 cm thick)
Bk2--84 to 122 cm; grayish brown (10YR 5/2) extremely gravelly loamy sand, very dark grayish brown (10YR 3/2) moist lithochromic colors; single grained; loose, nonsticky and nonplastic; common very fine and fine, few medium roots; many very fine interstitial pores; 75 percent gravel and 2 percent cobbles; very thin carbonate coatings on undersides of rock fragments; slightly effervescent; moderately alkaline (pH 8.0); clear smooth boundary. (25 to 38 cm thick)
Bk3--122 to 152 cm; grayish brown (10YR 5/2) extremely gravelly sand, very dark grayish brown (10YR 3/2) moist lithochromic colors; single grained; loose, nonsticky and nonplastic; many very fine interstitial pores; 60 percent gravel and 5 percent cobbles; very thin carbonate coatings on undersides of rock fragments; strongly effervescent; moderately alkaline (pH 8.4).
TYPE LOCATION: Lander County, Nevada; approximately 18 miles south of Battle Mountain, about 1,000 feet north and 1,000 feet west of the southeast corner of section 9, T. 29 N., R. 44 E.; USGS McCoy NE 7.5 minute topographic quadrangle; latitude 40 degrees 23 minutes 37 seconds N and longitude 117 degrees 1 minutes 29 seconds W; WGS84 Decimal Degrees 40.3936111 latitude, -117.0263889 longitude.
RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry, moist in winter and spring, dry early June through October; aridic soil moisture regime bordering on xeric.
Mean annual soil temperature: 8 to 11 degrees C.
Reaction: Slightly alkaline or moderately alkaline.
Particle-size control section - Clay content: 3 to 8 percent.
Rock fragments: 60 to 80 percent, mainly gravel.
A horizon
Value: 5 or 6 dry.
Bk horizon
Texture: Stratified extremely gravelly sand to extremely gravelly loamy sand.
Effervescence: Slightlyeffervescent through strongly effervescent.
COMPETING SERIES: These are the
Burbank,
Crunkvar,
Denio,
Sheeprock,
Skaha,
Ulymeyer and
Wrango series.
Burbank soils have mean annual soil temperatures of 11 to 13 degrees C and lack lithocromic colors.
Crunkvar and
Ulymeyer soils are noncalcareous. Denoio soils have less than 60 percent rock fragments in the particle-size control section.
Sheeprock soils are calcareous, have a sand fraction that is dominantly coarse and most rock fragments 0.3 to 1.2 cm in diameter.
Skaha soils are neutral and noncalcareous throughout.
Wrango soils are calcareous throughout the particle-size control section.
GEOGRAPHIC SETTING: Doowak soils are on inset fans. These soils formed in alluvium from mixed rock sources. Slopes are 0 to 2 percent. Elevations are 1,375 to 1,830 meters. The climate is cool semiarid with hot, dry summers and cold, moist winters. The mean annual precipitation is 200 to 250 mm; mean annual temperature is 7 to 10 degrees C.; and frost-free season is 100 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Oxcorel and
Zineb soils. Oxcorel soils have a clayey textured natric horizon. Zineb soils have a cambic horizon and are loamy-skeletal.
DRAINAGE AND PERMEABILITY: Excessively drained; slow runoff; very rapid permeability; high saturated hydraulic conductivity; rare or occasionally flooded.
USE AND VEGETATION: Rangeland and wildlife habitat. The present vegetation is mainly Wyoming big sagebrush, spiny hopsage, Thurber needlegrass, and Indian ricegrass.
DISTRIBUTION AND EXTENT: Central Nevada. These soils are not extensive. MLRA 24.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Lander County, North Part, Nevada, 1985.
REMARKS: Diagnostic horizon and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 18 cm (A and part of the Bw horizons).
Particle-size control section - The zone from 250 to 100 cm (The Bk1 and parts of the Bw and Bk2 horizons)
National Cooperative Soil Survey
U.S.A.