LOCATION HOME CAMP               NV+CA

Established Series
Rev. JBF/TM/JVC
02/2012

HOME CAMP SERIES

The Home Camp series consists of moderately deep, well drained soils that formed in colluvium and residuum derived from volcanic rocks with additions of volcanic ash. Home Camp soils are on mountains and plateaus. Slopes are 4 to 50 percent. The mean annual precipitation is about 360 mm and the mean annual temperature is about 6 degrees C.

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

TYPICAL PEDON: Home Camp stony ashy loam--rangeland. (Colors are for dry soil unless otherwise noted.)

A1--0 to 5 cm; grayish brown (10YR 5/2) stony ashy loam, very dark brown (10YR 2/2) moist; moderate fine and medium granular structure; slightly hard, friable, slightly sticky, slightly plastic; many very fine and fine roots; many very fine and fine interstitial, and few very fine tubular pores; 10 percent gravel, 5 percent cobbles, and 5 percent stones; slightly acid (pH 6.4); abrupt smooth boundary. (3 to 8 cm thick)

A2--5 to 20 cm; grayish brown (10YR 5/2) very gravelly ashy loam, very dark brown (10YR 2/2) moist; moderate fine and medium granular structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine roots; many very fine and fine interstitial, and few very fine tubular pores; 35 percent gravel and 10 percent cobbles; slightly acid (pH 6.5); abrupt smooth boundary. (10 to 20 cm thick)

BAt--20 to 36 cm; brown (10YR 5/3) very gravelly ashy sandy clay loam, dark brown (10YR 3/3) moist; moderate fine and medium subangular blocky structure; hard, friable, moderately sticky and moderately plastic; common very fine and fine roots; many very fine and fine interstitial pores; few faint clay films on faces of peds; 25 percent gravel and 10 percent cobbles; slightly acid (pH 6.5) abrupt smooth boundary. (0 to 28 cm thick)

Bt1--36 to 46 cm; brown (10YR 5/3) very gravelly ashy sandy clay loam, dark yellowish brown (10YR 3/4) moist; moderate fine and medium subangular blocky structure; very hard, friable, moderately sticky and moderately plastic; few very fine and fine roots; common very fine and fine interstitial pores; common faint and few distinct clay films on faces of peds and common faint clay films lining pores; 25 percent gravel and 10 percent cobbles; slightly acid (pH 6.5); abrupt wavy boundary. (8 to 30 cm thick)

Bt2--46 to 69 cm; pale brown (10YR 6/3) very gravelly clay, brown (7.5YR 4/4) moist crushed; weak fine and medium prismatic and strong very fine and fine angular blocky structure; very hard, firm, very sticky and very plastic; few very fine and fine roots; common very fine and fine interstitial pores; common distinct brown (7.5YR 4/2) and yellowish brown (10YR 5/4) clay films on faces of peds and common distinct clay films lining pores; 25 percent gravel and 10 percent cobbles; neutral (pH 6.6): abrupt wavy boundary. (20 to 46 cm thick)

Bt3--69 to 91 cm; very pale brown (10YR 7/3) very gravelly sandy clay loam, yellowish brown (10YR 5/4) moist crushed; moderate fine subangular blocky structure; hard, friable, moderately sticky and moderately plastic; few very fine and fine roots; common very fine and fine interstitial pores; few distinct and common faint brown (7.5YR 4/2) clay films on faces of peds; 35 percent gravel and 15 percent cobbles; neutral (pH 7.0); diffuse smooth boundary. (0 to 60 cm thick)

Cr--91 to 102 cm; very pale brown (10YR 7/3) tuff bedrock, brown (10YR 5/3) moist.

TYPE LOCATION: Washoe County, Nevada; about 1.25 miles south of Pilgrim Lake and the Buckhorn Road; approximately 400 feet south and 2,600 feet west of the northeast corner of section 5, T. 34 N., R. 18 E.; USGS Hole in the Ground 7.5 minute topographic quadrangle; latitude 40 degrees 51 minutes 23.5 seconds N and longitude 119 degrees 59 minutes 32.2 seconds W; NAD 83.

RANGE IN CHARACTERISTICS:
Soil moisture: Moist winter and spring and early summer, dry late summer and fall; xeric soil moisture regime.
Mean annual soil temperature: 6 to 7 degrees C.
Mollic epipedon thickness: 23 to 40 cm.
Depth to bedrock; 50 to 100 cm to a paralithic contact. The paralithic materials below the contact are weathered tuff.
Hard bedrock: Greater than 100 cm.
Reaction: Slightly acid or neutral.
Other features: Noncalcareous throughout.

Particle-size control section - Clay content: Averages 35 to 50 percent.
Rock fragments: 35 to 50 percent, mainly gravel and cobbles. Lithology of fragments is volcanic rocks such as basalt and andesite.

A horizons
Hue: 10YR or 7.5YR.
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 2 or 3, dry or moist.
Structure: Platy, granular, subangular blocky or is massive.
Consistence: Soft or slightly hard.
Volcanic glass content: 5 to 15 percent in the 0.2 to 2.0 mm fractions.
Oxalate extractable aluminum plus one-half oxalate iron: 0.2 to 0.4 percent.

BAt and Bt1 horizons
Hue: 10YR or 7.5YR.
Value: 4 or 5 dry, 3 or 4 moist.
Chroma: 2 through 4, dry or moist.
Texture: Ashy sandy clay loam or ashy clay loam.
Clay content: 25 to 35 percent
Rock fragments: 35 to 60 gravel, cobbles or stones
Structure: Subangular blocky or angular blocky.
Volcanic glass content: 5 to 15 percent in the 0.2 to 2.0 millimeter fractions.
Oxalate extractable aluminum plus one-half oxalate iron: 0.2 to 0.4 percent.

Bt2 horizon
Hue: 10YR or 7.5YR.
Value: 4 through 6 dry, 3 or 4 moist.
Chroma: 2 through 4, dry or moist.
Texture: Clay or sandy clay.
Rock fragments: 35 to 50 percent.
Clay content: 40 to 50 percent.
Structure: Subangular blocky, angular blocky, or prismatic.

COMPETING SERIES: These are the Breeseranch, Dupratt, Erakatak, Finsel, Hamtah, Humarel, Lamulita, Maule, Menbo, Potlid, Shotsprings , Squatterflat, and Wiltop series.

Breeseranch, Lamulita and Wiltop soils are deep to hard bedrock. Dupratt, Erakatak, Maule, Menbo, Humarel, Potlid, Shotspring soils have hard rock within 100 cm. Finsel soils have mollic epipedons that are more than 50 cm thick and that include all or part of the argillic horizon. Hamtah and Squatterflat soils are very deep

GEOGRAPHIC SETTING: Home Camp soils are on mountains and plateaus. They typically occur on footslope and backslope positions. These soils formed in colluvium and residuum derived from volcanic rocks such as tuff, andesite, and basalt with additions of volcanic ash. Slopes are 4 to 50 percent. Elevations range from 1,495 to 2,365 maters. The climate is subhumid having a mean annual precipitation of 300 to 400 mm, with most of the precipitation coming as snow. The mean annual temperature ranges from 5 to 7 degrees C and the mean summer temperature is 13 to 14 degrees C. The frost-free period is 30 to 70 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Newlands and Runyon soils. Newlands soils have a cryic soil temperature regime and are fine-loamy. Runyon soils are fine-loamy.

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

USE AND VEGETATION: Home Camp soils are used for rangeland and wildlife habitat. The vegetation is mainly mountain big sagebrush, antelope bitterbrush, Idaho fescue, bluebunch wheatgrass, basin wildrye, Sandberg's and Canby bluegrass, and Thurber's needlegrass.

DISTRIBUTION AND EXTENT: Northwestern Nevada and northeastern California. These soils are not extensive with about 9,200 acres of the series mapped to date. MLRAs 21 and 23.

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

SERIES ESTABLISHED: Washoe County, Nevada, 1971.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 36 cm (A1, A2, and BAt horizons).
Argillic horizon - The zone from 20 to 91 cm (BAt, Bt1, Bt2, and Bt3 horizons).
Vitrandic intergrade feature - The zone from the soil surface to 46 cm (A1, A2, Bat, and Bt1 horizons).
Paralithic contact - The boundary at 91 cm to underlying soft, weathered bedrock (Cr layer).
Particle-size control section - The zone from 20 to 71 cm (BAt, Bt1, and Bt2 horizons and part of the Bt3 horizon).

The concept of this soil was changed in 2006 from cryic to frigid based on historic documentation of soil temperature from study sites in California and Nevada.

ADDITIONAL DATA: Volcanic glass content and oxalate extractable aluminum plus one-half iron content is based on lab data from the associated Runyon series, reference pedons S98NV-031-013 through 015.

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National Cooperative Soil Survey
U.S.A.