LOCATION SOUTHCAMP NVEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, isotic, frigid Ultic Palexeralfs
TYPICAL PEDON: Southcamp very gravelly fine sandy loam on a north facing (10 degree), 70 percent slope at an elevation of 2137 meters. When described on06/14/2004 the soil was dry throughout. Colors are for dry soils unless otherwise noted.
Oi--0 to 3 cm; slightly decomposed plant material; abrupt smooth boundary. (0 to 8 cm thick)
Oe--3 to 5 cm; moderately decomposed plant material; abrupt smooth boundary. (0 to 5 cm thick)
A--5 to 10 cm; grayish brown (10YR 5/2) very gravelly fine sandy loam, very dark grayish brown (10YR 3/2) moist; 13 percent clay; weak very fine granular structure; soft, very friable, many very fine roots throughout; many very fine through very coarse irregular pores; 35 percent gravel; neutral, pH 7.0 by Bromthymol blue; clear smooth boundary. (3 to 25 cm thick)
E--10 to 38 cm; very pale brown (10YR 8/2) extremely cobbly loam, grayish brown (10YR 5/2) moist; 23 percent clay; moderate fine granular structure; soft, very friable, moderately sticky and moderately plastic; many fine and very fine and common medium through very coarse roots throughout; many very very fine through coarse irregular; 25 percent gravel 40 percent cobbles and 10 percent stones; neutral, pH 6.8 by Bromthymol blue; gradual smooth boundary. (13 to 50 cm thick)
Bt1--38 to 87 cm; light yellowish brown (10YR 6/4) extremely cobbly clay loam, yellowish brown (10YR 5/4) moist; 29 percent clay; moderate fine granular structure; soft, very friable, moderately sticky and moderately plastic; many fine and very fine and common medium through very coarse roots throughout; many very fine through very coarse irregular pores; 70 percent distinct clay films; 18 percent gravel, 20 stones and 50 percent cobbles; slightly acid, pH 6.5 by Bromthymol blue; clear smooth boundary. (25 to 64 cm thick)
Bt2--87 to 152 cm; brownish yellow (10YR 6/6) extremely stony clay loam, yellowish brown(10YR 5/6) moist; 33 percent clay; moderate fine subangular blocky structure; soft, very friable, moderately sticky and moderately plastic; common very fine through very coarse roots throughout; common very fine through medium irregular and tubular pores; 70 percent distinct clay films; 18 percent gravel, 20 percent cobbles, and 50 percent stones; slightly acid, pH 6.5 by Bromthymol blue; clear irregular boundary.
TYPE LOCATION: Douglas County, Nevada, above the big road cuts on highway 50 between spooner summit and shakespeare rock, 132 meters west and 25 meters south of the northeast corner of Section 14, Township 14N, Range 18E, 39 degrees, 5 minutes, 0 seconds North latitude and 119 degrees, 55 minutes, 8 seconds West longitude, NAD83 - U.S.G.S Quad: Glenbrook, Nevada.
RANGE IN CHARACTERISTICS:
Soil moiosture: usually moist between depths of 38 to 91 cm and are only dry in all parts from early August until early October. The soils have a xeric moisture regime.
Soil Temperature: mean annual soil temperature is 4 to 8 degrees C. and the mean summer soil temperature is 10 to 13 degrees C.
Surface rock fragment content:
0 to 5 percent consisting of: mainly cobbles but a few stones are possible.
Reaction: slightly acid to neutral
Base saturation: 35 to 75 percent. (By amonium acetate)
Control section:
Rock fragments: 35 to 90 percent, with 10 to 40 percent gravel, 10 to 60 percent
cobbles, and 10 to 60 percent stones.
Clay content: averages 18 to 35 percent clay
Mineralogy: isotic
A horizon:
Hue: 10YR
Value: 5 to 7 dry; 3 to 5 moist
Chroma: 2 to 4 dry; 2 to 4 moist
Organic matter: 4 to 10 percent
Texture of the fine earth fraction: Sandy loam, fine sandy loam, or loam
Clay content: 7 to 20 percent
Rock fragments: 20 to 50 percent
20 to 50 percent gravel
0 to 15 percent cobbles
Reaction: pH 6.1 to 7.3
E horizon:
Hue: 10YR
Value: 6 through 8 dry; 4 to 7 moist
Chroma: 2 dry; 3 moist
Organic matter: 0.25 to 1 percent
Texture of the fine earth fraction: Sandy loam, fine sandy loam, or loam
Clay content: 10 to 27 percent
Rock fragments: 60 to 90 percent
15 to 35 percent gravel
25 to 60 percent cobbles
5 to 20 percent stones
Reaction: pH 6.1 to 7.3
Bt horizons:
Hue: 10YR
Value: 5 to 7 dry; 4 to 7 moist
Chroma: 4 to 6 dry; 4 to 6 moist
Organic matter: 0.2 to 2 percent
Texture of the fine earth fraction: Sandy loam, sandy clay loam, and clay loam
Clay content: 27 to 35 percent
Rock fragments: 60 to 90 percent
10 to 35 percent gravel
15 to 60 percent cobbles
15 to 60 percent stones
Reaction: pH 6.1 to 7.3
COMPETING SERIES: These are the Inville soils. Inville soils are derived from mixed materials consisting of andesite and granodiorite and are formed in outwash and alluvium and averages less than 18 percent clay in the control section.
GEOGRAPHIC SETTING: The Southcamp soils are on mountain flanks and hill sides and ridge tops. Slopes range from 9 to 70 percent. These soils formed in colluvium over residuum weathered from porphyritic trachyte. Elevation is 1920 to 2310 meters. The climate is subhumid-continental with cold, moist winters and cool, dry summers. The frost free season is 40 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cagwin, Cassenai, Deerhill and Zephyrcove soils. The Cagwin and Cassenai soils are on granodiorite, while Deerhill soils are on metamorphics. Zephyrcove soils are moderately deep to a paralithic contact.
DRAINAGE AND PERMEABILITY: Well drained, moderate permeability, high runoff.
USE AND VEGETATION: This soil is used for wildlife and recreation. Vegetation is Jeffrey pine, white fir and sugar pine.
DISTRIBUTION AND EXTENT: Southcamp soils are of minor extent in Nevada in MLRA 22A -- Sierra Nevada Mountains
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Douglas County, (Tahoe Basin area), Nevada. Source of name is from a local peak.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Particle Size Control Section for this pedon: 38 to 88 cm (the Bt1 and portions of the Bt2)
Argillic horizon: 38 to 152 cm (the Bt1 and Bt2 horizons)