LOCATION SUTRO NVEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Aridic Haploxerolls
TYPICAL PEDON: Sutro very stony loam, woodland. (Colors are for dry soil unless otherwise noted.)
A1--O to 2 inches; brown (10YR 5/3) very stony loam, very dark grayish brown (10YR 3/2) moist; massive; soft, very friable, slightly sticky and slightly plastic; many very fine and fine roots; common fine and medium tubular pores; 5 percent stones, 20 percent pebbles; neutral (pH 6.6); abrupt smooth boundary. (1 to 5 inches thick)
A2--2 to 6 inches; brown (10YR 5/3) gravelly loam, dark brown (10YR 3/3) moist; weak fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine roots; common fine and medium tubular pores; 20 percent pebbles; neutral (pH 6.8); abrupt smooth boundary. (4 to 7 inches thick)
Bw--6 to 14 inches; brown (10YR 5/3) gravelly loam, brown (10YR 4/3) moist; weak coarse and very coarse subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine, and common medium and coarse roots; common fine and medium tubular pores; 25 percent pebbles; neutral (pH 6.8); abrupt smooth boundary. (4 to 12 inches thick)
C1--14 to 24 inches; brownish yellow (10YR 6/6) gravelly loam, dark yellowish brown (10YR 4/4) unrubbed and yellowish brown (10YR 5/4) rubbed moist; massive; slightly hard, very friable, slightly sticky and slightly plastic; common fine, medium and coarse roots; common fine and medium tubular pores; 30 percent pebbles; neutral (pH 7.0); clear wavy boundary. (8 to 20 inches thick)
Cr--24 to 48 inches; soft metavolcanic rock.
TYPE 10CATIONS: Carson City, Nevada; about 8 miles east and 4 miles south of Carson City, Nevada; about 500 feet south and 1,500 feet west of the NE corner of sec. 34, T.15N., R.21E.
RANGE IN CHARACTERISICS:
The mean annual soil temperature is 49 to 54 F., these soils are dry during summer and autumn.
Depth to the paralithic contact - 20 to 40 inches.
The mollic epipedon - 7 to 10 inches thick.
The control section from 10 inches to the paralithic contact is gravelly loam .
Rock fragments: 15 to 35 percent
Clay content: Less than 18 percent clay.
A1 horizon - Value of 4 or 5 dry, 2 or 3 moist,
Chroma: 2 or 3.
Rock fragment: 15 to 30 percent pebbles, 5 to 10 percent cobbles.
Structure: This horizon has weak fine or medium granular or subangular blocky structure, or it is massive.
Bw borizon: Value of 4 or 5 dry, 3 or 4 moist,
Chroma: 2 through 4.
Texture: Loam but is clay loam in some pedons.
Rock fragments: 10 to 20 percent pebbles, 5 to 15 percent cobbles.
Structure: Weak fine subangular or coarse subangular blocky structure, or it is massive.
C horizon: Value of 5 or 6 dry, 3 or 4 moist,
Chroma: 3 or 4.
Texture: Loam but is very fine sandy loam in some pedons.
Rock fragments: 5 to 20 percent pebbles and cobbles .
COMPETING SERIES: This is the tentative Capona series. Capona soils havc sola more than 20 inches thick, lack C horizons and have lithic contacts.
GEOGRAPHIC SETTING: Sutro soils are on uplands or low hills at elevations of 4,800 to 6,000 feet. Many hills have short rounded ridges and side slopes. Slopes are 15 to 50 percent. The soils formed in residuum weathered from soft metavolcanic rock that can be dug with hand tools. The climate is cool and arid with moist winters and dry summers. The mean annual precipitation, mostly snow, is 10 to 14 inches; mean annual temperature is 47 to 51 F.; and the frost-free season is 100 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cagle Koontz, Nosrac Tarloc and Xerta soils. Cagle soils have clayey argillic horizons. Koontz soils are shallow over metavolcanic rocks. Nosrac soils have clay loam argillic horizons. Tarloc soils have coarse-loamy argillic horizons. Xerta soils have clayey argillic horizons and are shallow over basalt rock.
DRAINAGE AND PERMIABILITY: Well drained; rapid runoff; moderate permeability.
USE AND VEGETATION: Woodland and wildlife habitat. Vegetation is principally pinyon and juniper with an understory of big sagebrush, ephedra, bitterbrush, desert peach and squirreltail.
DISTRIBUTION AND EXTENT: Western Nevada. These soils are of sma11 extent.
MLRA OFFICE RESPONSIBLE: Reno, Nevada
SERIES PROPOSED: Carson City Area, Nevada, 1975.
REMARKS:
Diagnistic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from 0 to 6 inches (the A1 and A2 horizon)
Cambic horizon - The zone from 6 to 14 inches (the Bw horizon)
Paralithic - The zone from 24 to 48 inches (the Cr horizon)
Scanned by NSSQA last state update 4/75
The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Reno MLRA office, without review of the soil series property data. The remainder of this document has not been updated.