LOCATION REDHOME                 NV+CA

Established Series
Rev. SES/TM-JVC
01/2020

REDHOME SERIES

The Redhome series consists of moderately deep, well drained soils that formed in residuum and colluvium derived from volcanic rocks with a component of volcanic ash. Redhome soils are on plateaus and mountains. Slopes are 4 to 15 percent. The mean annual precipitation is about 360 mm and the mean annual temperature is about 6.7 degrees C.

TAXONOMIC CLASS: Fine, mixed, superactive, frigid Vitritorrandic Argixerolls

TYPICAL PEDON: Redhome cobbly ashy loam--rangeland. (Colors are for dry soil unless otherwise noted.) The soil surface is partially covered with 5 percent stones, 10 percent cobbles, and 10 percent gravel.

A1--0 to 5 cm; brown (7.5YR 5/3) cobbly ashy loam, dark brown (7.5YR 3/2) moist; moderate thin and medium platy structure; hard, very friable, slightly sticky and slightly plastic; common very fine roots; many very fine vesicular pores; 5 percent stones, 10 percent cobbles, and 10 percent gravel; slightly acid (pH 6.4); clear wavy boundary. (5 or 8 cm thick)

A2--5 to 15 cm; brown (7.5YR 4/3) ashy sandy clay loam, dark reddish brown (5YR 3/2) moist; moderate fine and medium subangular blocky structure; hard, very friable, moderately sticky and moderately plastic; many very fine and fine roots; many very fine and common fine tubular pores; neutral (pH 7.0); clear wavy boundary. (8 to 13 cm thick)

Bt1--15 to 33 cm; brown (7.5YR 4/3) gravelly ashy clay loam, dark reddish brown (5YR 3/2) moist; strong medium subangular blocky structure; hard, very friable, moderately sticky and moderately plastic; many very fine and fine, common medium and coarse roots; many very fine tubular pores; common distinct dark reddish brown (5YR 3/2) clay films on faces of peds and lining pores; 5 percent cobbles and 20 percent gravel; neutral (pH 7.2); clear wavy boundary. (15 to 20 cm thick)

Bt2--33 to 56 cm; brown (7.5YR 5/4) gravelly clay loam, dark reddish brown (5YR 3/4) moist; moderate medium and coarse subangular blocky structure; hard, very friable, moderately sticky and moderately plastic; many very fine, common fine and medium roots; many very fine and common fine tubular pores; common distinct reddish brown (5YR 4/3) clay films on faces of peds and lining pores, dark reddish brown (5YR 3/3) moist; 5 percent cobbles and 20 percent gravel; neutral (pH 7.2); clear wavy boundary. (15 to 25 cm thick)

Bt3--56 to 71 cm; yellowish red (5YR 4/6) gravelly clay loam, dark reddish brown (5YR 3/4) moist; weak medium and coarse subangular blocky structure; hard, very friable, moderately sticky and moderately plastic; common very fine, fine and medium roots; many very fine tubular pores; common distinct reddish brown (5YR 4/3) clay films on faces of peds and lining pores; 5 percent cobbles and 20 percent gravel; neutral (pH 7.2); clear wavy boundary. (13 to 20 cm thick)

Bt4--71 to 91 cm; brown (7.5YR 4/4) gravelly clay loam, dark reddish brown (5YR 3/4), crushed, moist; weak medium subangular blocky structure; hard, very friable, moderately sticky and moderately plastic; common very fine, fine and medium roots; many very fine tubular pores; common distinct reddish brown (5YR 4/3) clay films on faces of peds and lining pores, dark reddish brown (5YR 3/3) moist; 5 percent cobbles and 25 percent gravel; neutral (pH 7.2); clear irregular boundary. (0 to 25 cm thick)

Cr--91 to 117 cm; soft, weathered vesicular basalt.

TYPE LOCATION: Washoe County, Nevada; about 2.5 miles northeast of Rowland Mountain; approximately 2,290 feet west and 1,900 feet north of the southeast corner of section 25, T. 35 N., R. 18 E.; USGS Burnt Lake 7.5 minute topographic quadrangle; 40 degrees 52 minutes 38.46 seconds north latitude and 119 degrees 54 minutes 30.91 seconds west longitude; WGS84 Decimal Degrees 40.8773500 latitude, -119.9085861 longitude.

RANGE IN CHARACTERISTICS:

Soil moisture - Usually moist from late fall through spring, dry from late June through October; Aridic moisture regime that borders on xeric.
Mean annual soil temperature - 44.4 to 8.3 degrees C.
Mollic epipedon thickness - 25 to 50 cm; includes the Bt1 horizon.
Depth to bedrock - 50 to 100 cm to a paralithic contact. The paralithic materials below the contact are weathered vesicular andesite or basalt.

Particle-size control section - Clay content: 35 to 45 percent;
Rock fragments: 15 to 35 percent, mainly gravel. Lithology of fragments are mainly andesite or basalt.

Base saturation - 60 to 75 percent by sum of cations.


A1 horizon
Hue: 7.5YR or 5YR.
Value: 2 or 3 moist.
Chroma: 2 or 3, dry or moist.
Clay content: 18 to 25 percent.
Organic matter content: 2 to 4 percent.
Volcanic glass content: 5 to 15 percent in the coarse silt through sand fractions.
Oxalate extractable aluminum plus one-half iron: 0.4 to 1 percent.
Reaction: Slightly acid or neutral.


A2 horizon
Hue: 7.5YR or 5YR.
Value: 2 or 3 moist.
Chroma: 2 or 3, dry or moist.
Clay content: 27 to 30 percent.
Organic matter content: 1 to 3 percent.
Volcanic glass content: 5 to 15 percent in the coarse silt through sand fractions.
Oxalate extractable aluminum plus one-half iron: 0.4 to 1 percent.
Reaction: Slightly acid or neutral.


Bt1 horizon
Hue: 7.5YR or 5YR.
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 2 or 3, dry or moist.
Clay content: 30 to 40 percent.
Rock fragments: 15 to 35 percent, mainly gravel.
Organic matter content: 1 or 2 percent.
Structure: Moderate or strong subangular blocky.
Volcanic glass content: 5 to 15 percent in the coarse silt through sand fractions.
Oxalate extractable aluminum plus one-half iron: 0.4 to 1 percent.
Reaction: Slightly acid or neutral.


Bt2, Bt3 and Bt4 horizons
Hue: 7.5YR or 5YR.
Value: 4 or 5 dry, 3 or 4 moist.
Chroma: 3 through 6, dry or moist.
Clay content: 35 to 45 percent.
Texture: Gravelly clay loam or gravelly clay.
Rock fragments: 15 to 30 percent gravel, 1 to 10 percent cobbles, 0 to 5 percent stones.
Structure: Subangular blocky or angular blocky.
Reaction: Neutral or slightly alkaline.

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

GEOGRAPHIC SETTING: Redhome soils are on plateaus and mountains. They typically occur on shoulder and footslope positions. These soils formed in residuum and colluvium derived from volcanic rocks such as tuff, andesite, or basalt with a component of volcanic ash. Slopes are 4 to 15 percent. Elevations range from 5,400 to 6,800 feet. The climate is semiarid with cool, moist winters and warm, dry summers. The mean annual precipitation is 12 to 16 inches, the mean annual temperature is 42 to 45 degrees F., and the frost-free period is 80 to 100 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dosie, Menbo, and Softscrabble soils. Dosie soils are clayey-skeletal, deep to bedrock, and have thick mollic epipedons. Menbo soils are clayey-skeletal. Softscrabble soils are loamy-skeletal, very deep, and have thick mollic epipedons.

DRAINAGE AND PERMEABILITY: Well drained; medium surface runoff; slow permeability (moderately low or moderately high saturated hydraulic conductivity).

USE AND VEGETATION: Redhome soils are used for rangeland and wildlife habitat. The vegetation is mainly mountain big sagebrush, antelope bitterbrush, squawapple, Douglas rabbitbrush, bluebunch wheatgrass, basin wildrye, and Thurber's needlegrass.

DISTRIBUTION AND EXTENT: Northwestern Nevada and northeastern California. These soils are not extensive with about 3,900 acres of the series mapped to date. MLRA 23.

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

SERIES ESTABLISHED: Surprise Valley-Home Camp Area, California and Nevada, 2006.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 33 cm (A1, A2 and Bt1 horizons).
Vitrandic intergrade feature - The zone from the soil surface to 33 cm (A1, A2 and Bt1 horizons).
Argillic horizon - The zone from 15 to 91 cm (Bt1, Bt2, Bt3 and Bt4 horizons).

Paralithic contact - The boundary at 91 cm to underlying soft, weathered bedrock (Cr layer).

Particle-size control section - The zone from 15 to 65 cm (Bt1 and Bt2 horizons and part of the Bt3 horizon).

ADDITIONAL DATA: The typical pedon at the series type location has partial data by the Soil Survey Laboratory (SSL), Lincoln, NE, as soil survey sample number S98NV-031-012 (pedon # 99P0165). Another reference pedon is S98NV-031-011 (pedon # 99P0164).

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National Cooperative Soil Survey
U.S.A.