LOCATION TANOB                   NV+CA

Established Series
Rev. OWB/WED/JVC/JBF
06/2017

TANOB SERIES

The Tanob series consists of moderately deep, well drained soils that formed in residuum derived from granitic rocks. Tanob soils are on mountains. Slopes are 8 to 30 percent. The mean annual precipitation is about 400 mm and the mean annual temperature is about 7 degrees C.

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, frigid Ultic Argixerolls

TYPICAL PEDON: Tanob gravelly loamy coarse sand--rangeland. (Colors are for dry soil unless otherwise noted.) The soil surface is covered with 25 percent fine gravel.

A1--0 to 5 cm; grayish brown (10YR 5/2) gravelly loamy coarse sand, very dark grayish brown (10YR 3/2) moist; single grain; loose, nonsticky and nonplastic; common very fine roots; many very fine and fine interstitial pores; 20 percent fine gravel; strongly acid (pH 5.4); abrupt smooth boundary. (3 to 8 cm thick)

A2--5 to 43 cm; dark grayish brown (10YR 4/2) loamy coarse sand, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine, fine, and medium roots; many very fine, fine and medium tubular pores; 10 percent fine gravel; moderately acid (pH 6.0); clear smooth boundary. (33 to 46 cm thick)

Bt1--43 to 56 cm; yellowish brown (10YR 5/4) coarse sandy loam, brown (10YR 4/3) moist; weak medium subangular blocky structure; hard, friable, slightly sticky and nonplastic; many very fine, fine and medium roots; many very fine and fine tubular pores; 10 percent fine gravel; few faint clay films bridging sand grains and lining pores; moderately acid (pH 6.0); clear smooth boundary. (5 to 13 cm thick)

Bt2--56 to 71 cm; light yellowish brown (10YR 6/4) sandy loam, dark yellowish brown (10YR 4/4) moist; massive; very hard, friable, slightly sticky and slightly plastic; many very fine and common fine roots; many very fine tubular pores; 5 percent fine gravel; common distinct clay films bridging sand grains and lining pores; slightly acid (pH 6.4); clear smooth boundary. (13 to 20 cm thick)

C--71 cm; weathered granodiorite.

TYPE LOCATION: Washoe County, Nevada; on the east side of Petersen Mountain; approximately 700 feet south and 700 feet west of the northeast corner of section 20, T. 23 N., R. 18 E.; USGS Granite Peak 7.5 minute topographic quadrangle; latitude 39 degrees 50 minutes 58 seconds N and longitude 119 degrees 58 minutes 52 seconds W; WGS84 Decimal Degrees 39.8494444 latitude, -119.9811111 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry in the summer and moist in winter and spring; xeric moisture regime that borders on aridic.
Mean annual soil temperature: 6 to 8 degrees C.
Mollic epipedon thickness: 36 to 46 cm.
Depth to base of argillic horizon: 50 to 100 cm.
Depth to bedrock: 50 to 100 cm to a paralithic contact. The paralithic materials below the contact are weathered granitic rock such as granodiorite or granite.
Base saturation: 50 to 75 percent (by sum of cations) in the mollic epipedon.

Particle-size control section - Clay content: 8 to 18 percent.
Rock fragments: 5 to 15 percent, mainly fine gravel. Lithology of fragments is granitic rock such as granodiorite.

A horizons
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 2 or 3, dry or moist.
Reaction: Strongly acid through slightly acid.
Organic matter content: 1 to 3 percent.

Bt horizons
Value: 5 or 6 dry, 4 or 5 moist.
Chroma: 3 or 4, dry or moist.
Texture: Sandy loam or coarse sandy loam.
Rock fragments: 5 to l5 percent fine gravel.
Clay content: 8 to 18 percent.
Reaction: Moderately acid or slightly acid.
Organic matter content: 0.5 to 1 percent.

COMPETING SERIES: There are currently no other series in this family.

GEOGRAPHIC SETTING: Tanob soils are on mountains. These soils formed in residuum derived from granitic rocks. Slopes are 8 to 30 percent. Elevations range from 1,525 to 2,290 meters. The climate is semiarid with cold, moist winters and warm, dry summers. The mean annual precipitation is 360 to 460 mm, the mean annual temperature is 6 to 7 degrees C, and the frost-free period is 50 to 80 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Graufels and Haypress soils. Graufels soils are sandy and do not have argillic horizons. Haypress soils are sandy, deep to bedrock, and do not have argillic horizons.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; low or medium surface runoff; moderate permeability; moderately high saturated hydraulic conductivity.

USE AND VEGETATION: Tanob soils are used for rangeland and wildlife habitat. The vegetation is mountain big sagebrush, antelope bitterbrush, snowberry, Douglas rabbitbrush, Indian ricegrass, and Thurber's needlegrass.

DISTRIBUTION AND EXTENT: Western Nevada and northeastern California. These soils are not extensive with about 3,100 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:
Mollic epipedon - The zone from the soil surface to 43 cm (A1 and A2 horizons).
Ultic subgroup feature - The zone from 25 to 43 cm with less than 75 percent base saturation (part of the A2 horizon).
Argillic horizon - The zone from 43 to 71 cm (Bt1 and Bt2 horizons).
Paralithic contact - The boundary at 71 cm to underlying weathered bedrock (Cr layer).
Particle-size control section - The zone from 43 to 71 cm (Bt1 and Bt2 horizons).

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National Cooperative Soil Survey
U.S.A.