LOCATION ALADSHI NV
Established Series
Rev. OWB-WED-JVC-JBF
02/2017
ALADSHI SERIES
The Aladshi series consists of very deep, well drained soils that formed in alluvium derived from mixed rocks. Aladshi soils are on the distal parts of fan remnants. Slopes are 2 to 8 percent. The mean precipitation is about 200 mm and the mean annual temperature is about 9 degrees C.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Durinodic Xeric Haplargids
TYPICAL PEDON: Aladshi gravelly sand--rangeland. (Colors are for dry soil unless otherwise noted.) An erosion pavement of gravel covers about 25 percent of the soil surface.
A1--0 to 3 cm; brown (10YR 5/3) gravelly sand, very dark grayish brown (10YR 3/2) moist; single grain; loose, few very fine roots; common very fine vesicular and interstitial pores; 15 percent gravel; slightly acid (pH 6.5); abrupt smooth boundary. (3 or 5 cm thick)
A2--3 to 13 cm; light brownish gray (10YR 6/2) sandy loam, dark grayish brown (10YR 4/2) moist; massive; soft, very friable, slightly sticky and slightly plastic; few very fine roots; many very fine and fine vesicular and few very fine tubular pores; slightly acid (pH 6.5); abrupt wavy boundary. (5 to 15 cm thick)
A3--13 to 18 cm; light brownish gray (10YR 6/2) fine sandy loam, dark grayish brown (10YR 4/2) moist; massive; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; slightly acid (pH 6.5); abrupt wavy boundary. (0 to 10 cm thick)
Bt1--18 to 30 cm; brown (7.5YR 5/4) loam, brown (7.5YR 4/4) moist; weak medium prismatic and angular blocky structure; hard, friable, moderately sticky and slightly plastic; common very fine, fine, and medium roots; common very fine tubular pores; many faint clay films on faces of peds; 10 percent gravel; neutral (pH 6.8); clear wavy boundary. (8 to 15 cm thick)
Bt2--30 to 58 cm; brown (7.5YR 5/4) gravelly loam, brown (7.5YR 4/4) moist; moderate fine prismatic and subangular blocky structure; hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; common faint clay films on faces of peds and lining pores and few distinct clay films on faces of peds; 15 percent gravel; slightly alkaline (pH 7.4); clear wavy boundary. (20 to 30 cm thick)
Btk--58 to 86 cm; brown (7.5YR 5/4) gravelly loam, brown (7.5YR 4/4) moist; massive; hard, friable, slightly sticky and slightly plastic; few fine roots; few fine tubular pores; few faint clay films bridging sand grains; 20 percent gravel; secondary carbonate segregated as common fine filaments; strongly effervescent; moderately alkaline (pH 8.2); clear wavy boundary. (15 to 28 cm thick)
Bqk--86 to 112 cm; brown (7.5YR 5/4) very gravelly loam, brown (7.5YR 4/4) moist; massive; hard, firm and brittle, slightly sticky and slightly plastic; few very fine tubular and common very fine interstitial pores; very few faint clay films bridging sand grains; 55 percent gravel; secondary carbonates segregated as common fine filaments; strongly effervescent; moderately alkaline (pH 8.4); gradual wavy boundary. (15 to 30 cm thick)
Bk--112 to 152 cm; pinkish gray (7.5YR 6/2) extremely gravelly sandy loam, brown (7.5YR 4/2) moist; massive; hard, very friable, slightly sticky and slightly plastic; few very fine roots; few very fine tubular and common very fine interstitial pores; 65 percent gravel; secondary carbonates segregated as few fine filaments; strongly effervescent; moderately alkaline (pH 8.0).
TYPE LOCATION: Washoe County, Nevada; about 21 miles north-northeast of Reno in the Warm Springs Valley; 1,700 feet north and 400 feet east of the southwest corner of section 3, T. 22 N., R. 21 E.; USGS Moses Rock 7.5 minute topographic quadrangle; latitude 39 degrees 48 minutes 4.5 seconds N and longitude 119 degrees 37 minutes 10 seconds W; WGS84 Decimal Degrees 39.8011111 latitude, -119.6191667 longitude.
RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry, moist in winter and spring, dry summer and fall; aridic moisture regime that borders on xeric.
Mean annual soil temperature: 9 to 11 degrees C.
Depth to base of argillic horizon; 50 to 75 cm.
Depth to horizon with firm consistence and brittle manner of failure: 64 to 89 cm.
Particle-size control section - Clay content: 18 to 27 percent.
Rock fragments: 5 to 25 percent, mainly gravel. Lithology of fragments is mixed.
A horizons
Value: 5 through 7 dry, 3 or 4 moist; values of 5 dry and 3 moist are only in the thin A1 horizon.
Chroma: 2 or 3, dry or moist.
Structure: Massive or has moderate or weak, medium or thick platy structure; There is commonly a thin subhorizon that is single grain at the surface of some pedons.
Consistence: Soft or slightly hard when dry.
Reaction: Slightly acid or neutral.
Bt and Btk horizons
Hue: 7.5YR or 10YR.
Value: 5 or 6 dry, 4 or 5 moist.
Chroma: 2 through 4, dry or moist.
Texture: Loam, gravelly loam, sandy clay loam, or sandy loam.
Structure: Weak or moderate prismatic, angular blocky, or subangular blocky structure; In some pedons the Btk horizon is massive.
Reaction: Neutral through moderately alkaline.
Calcium carbonate equivalent: 1 to 5 percent.
Bqk and Bk horizons
Texture: Stratified very gravelly loam to extremely gravelly loamy sand; Thin strata of coarser or finer material is in some pedons.
Calcium carbonate equivalent: 1 to 5 percent.
Other features: Some pedons have up to 25 percent durinodes.
COMPETING SERIES: These are the
Alley,
Allor,
Chime,
Cleghorn,
Glyphs,
Igert,
Mimentor,
Nevador,
Qwynn,
Wedertz,
Wedlar, and
Zevadez series.
Alley soils do not have subhorizons of the argillic horizon with less than 15 percent rock fragments and do not have identifiable secondary carbonates in the argillic horizon.
Allor have 27 to 35 percent clay in the particle-size control section.
Chime soils are moderately deep to paralithic contacts.
Cleghorn soils have 0 to 5 percent rock fragments in the particle-size control section.
Glyphs and
Zevadez soils are 30 to 50 cm to the base of the argillic horizon.
Igert soils are moderately deep to lithic contacts.
Mimentor,
Nevador, and
Wedlar soils do not have identifiable secondary carbonates in the argillic horizon and do not have horizons which are firm and brittle when moist.
Qwynn soils are not intermittently moist during summer months and lack Bk horizons above the argillic horizon.
Wedertz soils do not have secondary carbonates in the lower part of the argillic horizon and have 0 to 5 percent rock fragments in the particle-size control section.
GEOGRAPHIC SETTING: Aladshi soils are on the distal parts of fan remnants. They formed in alluvium derived from mixed rocks. Slopes are 2 to 8 percent. Elevations range from 1,345 to 1,590 meters. The climate is semiarid with cool, moist winters and warm, dry summers. The mean annual precipitation is 180 to 230 mm, mean annual temperature is 8 to 11 degrees C., and the frost-free period is 100 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are
Cassiro and
Kayo soils. Cassiro soils are clayey-skeletal, have mollic epipedons, and do not have horizons which are firm and brittle when moist. Kayo soils are loamy-skeletal and do not have horizons which are firm and brittle when moist.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; medium or high surface runoff; moderately slow permeability; moderately high saturated hydraulic conductivity.
USE AND VEGETATION: Aladshi soils are used for livestock grazing, wildlife, irrigated cropland, and urban development. The vegetation is principally Wyoming big sagebrush, spiny hopsage, bottlebrush squirreltail, Indian ricegrass, Douglas rabbitbrush, and cheatgrass.
DISTRIBUTION AND EXTENT: Western Nevada. These soils are not extensive, with about 6,000 acres of the series mapped to date. MLRA 26.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California.
SERIES ESTABLISHED: Washoe County (South Part), Nevada, 1980.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 18 cm (A1, A2, and A3 horizons).
Argillic horizon - The zone from 18 to 86 cm (Bt1, Bt2, and Btk horizons).
Duric feature - The zone from 86 to 102 cm (part of the Bqk horizon).
Particle size control section - The zone from 18 to 68 cm (Bt1 and Bt2 horizons and part of the Btk horizon).
National Cooperative Soil Survey
U.S.A.