LOCATION SIEGEL NV

Established Series
Rev. CWL/JBF
11/2016

SIEGEL SERIES

The Siegel series consists of very deep, well drained soils that formed on sideslopes of eroded mudflow deposits from welded tuff, limestone and quartzite. Siegel soils are on mountains. Slopes range from 4 to 30 percent. The mean annual precipitation is about 450 mm and the mean annual air temperature is about 5 degrees C.

TAXONOMIC CLASS: Clayey-skeletal, smectitic, frigid Calcic Argixerolls

TYPICAL PEDON: Siegel gravelly loam--rangeland. (Colors are for dry soil unless otherwise noted.) The surface is covered with approximately 20 percent gravel.

A1--0 to 8 cm; grayish brown (10YR 5/2), gravelly loam, very dark grayish brown (10YR 3/2) moist; moderate medium subangular blocky structure parting to strong medium granular; soft, very friable, nonsticky and nonplastic; many very fine and few fine roots; common very fine and fine, few medium interstitial and tubular pores; 20 percent gravel; slightly alkaline (pH 7.6); clear smooth boundary.

A2--8 to 23 cm; dark grayish brown (10YR 4/2), gravelly loam, very dark brown (10YR 2/2) moist; strong medium subangular blocky structure parting to weak fine subangular blocky; hard, firm, slightly sticky and slightly plastic; common very fine and fine, and few medium roots; common very fine and few fine and medium interstitial and tubular pores; 20 percent gravel; slightly alkaline (pH 7.4); clear smooth boundary. (combined thickness of the A1 and A2 horizons is 12 to 25 cm)

Bt--23 to 46 cm; yellowish brown (10YR 5/4), very gravelly clay loam, dark yellowish brown (10YR 3/4) moist; strong coarse angular blocky structure parting to moderate medium angular blocky; hard, firm, very sticky and moderately plastic; common very fine and few roots; common very fine and few fine and medium tubular pores; common faint and few distinct clay films on faces of peds; 40 percent gravel; slightly effervescent; slightly alkaline (pH 7.6); clear smooth boundary.

Btk--46 to 89 cm; light yellowish brown (10YR 6/4), very gravelly clay, dark yellowish brown (10YR 4/4) moist; strong coarse angular blocky structure parting to moderate medium angular blocky; very hard, very firm, very sticky and moderately plastic; few very fine and fine roots; few very fine, fine, and medium tubular pores; common distinct clay films on faces of peds; common distinct (10 percent) secondary calcium carbonate concretions on bottom of rock fragments; 45 percent gravel; violently effervescent; moderately alkaline (pH 8.0); clear smooth boundary. (combined thickness of the Bt and Btk horizons is 35 to 70 cm thick)

Bkk--89 to 158 cm; very pale brown (10YR 8/2), gravelly clay loam, very pale brown (10YR 7/3) moist; moderate coarse subangular blocky structure ; slightly hard, friable, moderately sticky and slightly plastic; few very fine roots; few very fine and fine tubular pores; many distinct (50 percent) secondary calcium carbonate masses; 20 percent gravel; violently effervescent; moderately alkaline (pH 8.3);. (50 to 100 cm thick)

TYPE LOCATION: White Pine County, Nevada; about 1 mile south of McCurdy Creek and 1 miles north of Mud Spring and 25 feet east of jeep trail; about 800 feet south and 1,700 feet east of the northwest corner of sec. 22, T. 22 N., R. 65 E.; USGS Stonehouse 7.5 minute quadrangle; latitude 39 degrees 46 minutes 25.8 seconds N and longitude 114 degrees 37 minutes 1.6 seconds W; WGS84 Decimal Degrees 39.7738333 latitude, -114.6171111 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry; moist in winter and spring, dry in all parts at least 45 consecutive days following the summer solstice (July and August); xeric soil moisture regime bordering aridic. Most of the snow received on the site blows off resulting in patchy snow cover from December through February.
Soil temperature: 5.5 to 7 degrees C.
Thickness of mollic epipedon: 18 to 25 cm.
Organic matter: 2 to 4 percent.
Depth to argillic horizon: 13 to 25 cm.
Thickness of argillic horizon: 46 to 70 cm.
Depth to carbonates: 45 to 75 cm.

Particle-size control section - Clay content: 35 to 45 percent.
Rock fragments: 35 to 50 percent, mainly angular and subangular gravel. Lithology of the fragments is mainly welded tuff.

A horizons
Value: 4 or 5 dry, and 2 or 3 moist
Chroma: 2 or 3, dry and moist
Mineralogy: 5 to 15 percent volcanic glass in the 0.02 to 2 mm fraction and averages 0.01 to 0.05 percent Al plus 1/2Fe, extracted by ammonium oxalate.
Reaction: Slightly alkaline or moderately alkaline.

Bt horizon
Hue: 7.5YR or 10YR.
Value: 5 or 6 dry, and 3 or 4 moist.
Chroma: 3 or 4, dry or moist.
Texture: Clay loam or clay.
Clay: 35 to 45 percent.
Rock fragments: 35 to 50 percent, mainly as gravel.
Structure: Subangular blocky or angular blocky.
Effervescence: None to slightly effervescent.
Soil reaction: Slightly alkaline or moderately alkaline.
Calcium carbonate equivalence: 0 to 5 percent.

Btk horizon
Hue: 7.5YR or 10YR.
Value: 5 or 6 dry, and 3 or 4 moist.
Chroma: 3 or 4, dry or moist.
Texture: Clay loam or clay.
Clay: 35 to 45 percent.
Rock fragments: 35 to 50 percent, mainly as gravel.
Structure: Subangular blocky or angular blocky.
Effervescence: Slightly effervescent to violently effervescent.
Soil reaction: Slightly alkaline or moderately alkaline.
Calcium carbonate equivalence: 5 to 15 percent.

Bkk horizon
Value: 7 to 8 dry, and 6 or 7 moist.
Chroma: 2 or 3 dry and moist.
Texture: Clay loam or sandy clay loam.
Clay: 30 to 35 percent.
Rock fragments: 20 to 40 percent.
Structure: Subangular blocky or massive.
Soil reaction: Moderately alkaline to strongly alkaline.
Calcium carbonate equivalence: 30 to 40 percent.

COMPETING SERIES: These are the Acord, Challis, and Datwyler series.

Acord soils have a mollic epipedon that is 25 to 50 cm thick and the rock fragments are mainly cobbles. Challis soils have a mollic epipedon that is 25 to 38 cm thick and have Bkq horizons. Datwyler soils are moderately deep to a lithic contact.

GEOGRAPHIC SETTING: Siegel soils are on sideslopes of eroded mudflow deposits in mountains. These soils formed in a mudflow deposit. Slopes range from 4 to 30 percent.
Elevation ranges from 2,300 to 2,500 meters. The climate is dry-subhumid with cool moist winters and warm dry summers. The mean annual precipitation ranges from 400 to 500 mm. The mean annual air temperature ranges from 4 to 6 degrees C. The frost-free period ranges from about 40 to 70 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Aurum, Mattier, and McIvey series. Aurum soils have a duripan. Mattier soils are shallow to a lithic contact. McIvey soils do not have secondary calcium carbonate in the profile.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; very high runoff; moderately low saturated hydraulic conductivity.

USE AND VEGETATION: Siegel soils are used for livestock grazing, recreation, and wildlife habitat. The potential native vegetation is bluebunch wheatgrass and low sagebrush. This pedon is correlated to Ecological Site Description R028BY037NV, Claypan 12-14 P.Z.

DISTRIBUTION AND EXTENT: East Central Nevada, U.S.A.; These soils are not extensive. The series concept and main acreage is in MLRA 28B.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California.

SERIES ESTABLISHED: White Pine County, Humboldt-Toiyabe National Forest, South Part, Nevada, 2013 (NV778). The name is from a local drainageway.

REMARKS: Diagnostic horizons and features recognized in the profile are:
Mollic epipedon - The zone from 0 to 23 cm (A1 and A2 horizons).
Argillic horizon - The zone from 23 to 89 cm (Bt and Btk horizons).
Calcic horizon - The zone from 89 to 158 cm (Bkk horizon).
Particle-size control section - The zone from 23 to 73 cm (Bt and upper part of the Btk horizons).

ADDITIONAL DATA: User Pedon ID: 09NV778062-CWL

National Cooperative Soil Survey
U.S.A.