LOCATION HOOT NV+WY
Established Series
Rev. TMM-DD-JBF
10/2016
HOOT SERIES
The Hoot series consists of shallow, well drained soils that formed in residuum and colluvium derived from metamorphic and volcanic rocks. Hoot soils are on crests, ridges, summits, and side slopes of hills, mountains and plateaus. Slopes are 4 to 75 percent. The mean annual precipitation is about 180 mm and the mean annual temperature is about 9 degrees C.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Lithic Haplargids
TYPICAL PEDON: Hoot very cobbly loam, rangeland. (Colors are for dry soil unless otherwise noted.) The soil surface is partially covered with approximately 30 percent gravel and 25 percent cobbles and stones.
A1--0 to 5 cm; pale brown (10YR 6/3) very cobbly loam, brown (10YR 4/3) moist; moderate very thin platy structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; many fine vesicular pores; 20 percent gravel, 15 percent cobbles and 5 percent stones; slightly alkaline (pH 7.8); clear smooth boundary. (3 to 10 cm thick)
A2--5 to 10 cm; pale brown (10YR 6/3) very gravelly loam, brown (10YR 4/3) moist; moderate very thin platy structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; common fine tubular pores; 40 percent gravel, 10 percent cobbles; slightly alkaline (pH 7.8); clear smooth boundary. (5 to 18 cm thick)
Bt--10 to 36 cm; light brown (7.5YR 6/4) extremely gravelly clay loam, brown (7.5YR 5/4) moist; weak very fine subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; many very fine, few fine roots; many very fine tubular pores; 50 percent gravel, 15 percent cobbles; common faint clay films on ped faces and lining pores; slightly alkaline (pH 7.8); abrupt smooth boundary. (10 to 30 cm thick)
R--36 cm; andesite.
TYPE LOCATION: Pershing County, Nevada; in the southern part of the Tobin Range on the Jersey Valley side, about 2,100 feet east and 400 feet south of the northwest corner of section 3, T. 26 N., R. 39 E.; USGS Home Station Ranch 7.5 minute topographic quadrangle; latitude 40 degrees 9 minutes 24 seconds N and longitude 117 degrees 34 minutes 51 seconds W; WGS84 Decimal Degrees 40.1566667 latitude, -117.5808333 longitude.
RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry, moist in some part during winter and early spring, dry late May through October; typic aridic soil moisture regime.
Mean annual soil temperature: 8 to 12 degrees C.
Depth to bedrock: 25 to 50 cm.
Particle-size control section - Clay content: Averages 25 to 35 percent.
Rock fragments: 50 to 70 percent, mainly gravel.
A horizon
Hue: 10YR or 2.5Y.
Value: 6 or 7 dry; 4 or 5 moist.
Chroma: 2 or 3 dry and moist.
Reaction: Slightly alkaline or moderately alkaline.
Bt horizon
Hue: 10YR or 7.5YR, clay films range to 5YR.
Value: 5 or 6 dry, 4 or 5 moist.
Chroma: 3 or 4.
Texture: Extremely gravelly loam, extremely gravelly clay loam or very gravelly clay loam.
Structure: Subangular blocky or is massive.
Consistence: Slightly sticky or sticky and slightly plastic or plastic, wet.
Reaction: Slightly alkaline to strongly alkaline.
Carbonates: Commonly noncalcareous. Some pedons have carbonate coats on the undersides of rock fragments that occur directly above the bedrock.
COMPETING SERIES: These are the
Downeyville,
Etinarg,
Mirkwood,
Theon,
Tognoni,
Valleycity,
Vium and
Waucoba series.
Downeyville,
Mirkwood,
Theon,
Vium and
Waucoba soils have mean annual soil temperatures warmer than 12 degrees C.
Etinarg soils average 18 to 25 percent clay in the particle-size control section. Downeyville soils also have carbonate coated rock fragments in the argillic horizon and effervescent Btk horizons. Mirkwood and Vium soils also have 35 to 50 percent rock fragments in particle-size control section. Theon soils also lack A2 horizons. Waucoba soils also have an argillic horizon that is effervescent.
Tognoni soils have abrupt AB horizon boundaries.
Valleycity soils are effervescent throughout their profile and have mainly stones and cobbles in the particle-size control section.
GEOGRAPHIC SETTING: Hoot soils are on summit, crests, ridges and side slopes of hills, mountains and plateaus. These soils formed in residuum and colluvium derived from metamorphic and volcanic rocks. Slopes are 4 to 75 percent. Elevations are 600 to 1,800 meters and as high as 2,100 meters on southerly aspects. The climate is arid with cool, moist winters and hot, dry summers. The annual precipitation is 150 to 200 mm; mean annual temperature is 7 to 11 degrees C., and the frost-free season is 100 to 130 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Atlow,
Burrita and
Trunk soils. Atlow soils have an aridic soil moisture regime that borders on xeric. Burrita soils have a clayey-skeletal particle-size control section. Trunk soils have a fine-textured particle-size control section and are 56 to 97 cm to bedrock.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; medium to very rapid runoff; moderately high saturated hydraulic conductivity.
USE AND VEGETATION: Rangeland and wildlife habitat. The present vegetation is mainly shadscale and bud sagebrush with some Indian ricegrass and bottlebrush squirreltail.
DISTRIBUTION AND EXTENT: Northwestern Nevada. These soils are moderately extensive. MLRA 24.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Owyhee County, Idaho, 1975.
REMARKS: The official series type location was moved from Owyhee County, Idaho to Pershing County, Nevada in 1985.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 10 cm (A1 and A2 horizons).
Argillic horizon - The zone from the 10 to 36 cm (Bt horizon).
Lithic contact - The boundary at 36 cm (2R layer).
Particle-size control section - The zone from the soil surface to 36 cm (A1, A2 and Bt horizons).
National Cooperative Soil Survey
U.S.A.