LOCATION PEGLER NV+CAEstablished Series
TAXONOMIC CLASS: Ashy, glassy, mesic, shallow Vitrixerandic Haplocambids
TYPICAL PEDON: Pegler ashy fine sandy loam, rangeland. (Colors are for dry soil unless otherwise noted.) The soil surface is partly covered with 10 percent volcanic and obsidian gravel.
A--0 to 2 inches, light gray (10YR 7/2) ashy fine sandy loam, dark grayish brown (10YR 4/2) moist; weak, thick platy structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; many very fine interstitial pores; strongly effervescent; strongly alkaline (pH 8.8); abrupt smooth boundary. (1 to 3 inches thick).
Bw1--2 to 5 inches, pale brown (10YR 6/3) ashy sandy loam, brown (10YR 5/3) moist; weak, medium prismatic and moderate very fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; few very fine and fine roots; many very fine interstitial and few fine tubular pores; common faint colloidal clay coatings on sand grains; strongly effervescent; strongly alkaline (pH 8.6); abrupt wavy boundary. (3 to 7 inches thick).
2Bw2--5 to 10 inches, very pale brown (10YR 7/4) paragravelly ashy sandy clay loam, yellowish brown (10YR 5/4) moist; moderate, medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; common very fine, and few fine through coarse roots, medium and coarse roots are horizontal at the lower boundary; many very fine interstitial, and few fine tubular pores; 20 percent paragravel; common thin colloidal clay coatings on sand grains; violently effervescent; strongly alkaline (pH 8.8); clear irregular boundary.(4 to 6 inches thick).
2Crk--10 to 14 inches, fractured tuff, slightly curved fracture plains; many .5 millimeter thick lime coats in fractures.
2Cr--14 to 30 inches, fractured, weathered tuff.
TYPE LOCATION: Washoe County, Nevada; in an unsectioned area; about 100 feet south and 200 feet east of the apparent center of section 10, T.36 N., R.19 E.;
41 degrees, 1 minute, 3.9 seconds north latitude and 119 degrees, 50 minutes, 15.15 seconds west longitude; NAD-27 datum; Juniper Springs, NV 7.5 minute quadrangle.
RANGE IN CHARACTERISTICS:
Soil moisture - Usually dry; dry summer and fall, moist in late winter and spring. Aridic bordering xeric soil moisture regime.
Mean annual soil temperature - 47 to 50 F.
Depth to a paralithic contact - 10 to 14 inches.
Mineralogy - 40 to 75 percent volcanic glass in the 0.2 to 2.0 millimeter fraction.
Control section: Clay content - 18 to 24 percent.
Rock fragments - 0 to 10 percent volcanic pebbles; 0 to 30 percent paragravel, usually less than 10 percent in all horizons except immediately above the paralithic contact.
A horizon: Hue: 10YR or 2.5Y.
Value: 6 or 7 dry, 3 or 4 moist.
Chroma: 2 or 3.
Reaction: moderately alkaline or strongly alkaline.
Sodicity: SAR is 0 to 5.
Bw horizons: Value: 6 or 7 dry, 4 or 5 moist.
Chroma: 2 through 4.
Texture: Dominantly ashy sandy clay loam or ashy sandy loam, subhorizons of ashy loam are in some pedons.
Other features: few or common collodial stains on sand grains and pebbles in the lower part.
Reaction: moderately alkaline or strongly alkaline.
Sodicity: SAR is 0 to 5.
COMPETING SERIES: These are the Jackpot and Weash series. Jackpot soils have 5 to 10 percent clay in the control section. Weash soils are neutral or slightly alkaline in the A horizon.
GEOGRAPHIC SETTING: Pegler soils are on rock pediments at elevations of 4,500 to 5,000 feet. These soils formed in volcanic ash and alluvium from mixed volcanic and sedimentary rocks over residuum from soft tuff. Slopes range from 0 to 8 percent. The climate is cool, semiarid with a mean annual precipitation of about 8 to 10 inches. Mean annual temperature ranges from 44 to 47 F. The frost-free period is 100 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are Nopeg (T, NV) and Old Camp soils. Nopeg soils have Bw horizons with SAR greater than 13 and have a typic aridic soil moisture regime. Old Camp soils have lithic contacts, loamy-skeletal control sections and have argillic horizons.
DRAINAGE AND PERMEABILITY: Well drained; very high runoff; moderate permeability.
USE AND VEGETATION: These soils are used for livestock grazing. The vegetation is principally Wyoming big sagebrush, spiny hopsage, and Indian ricegrass.
DISTRIBUTION AND EXTENT: Washoe County, Nevada, Surprise Valley-Home Camp Area; MLRA 23. These soils are of small extent.
MLRA OFFICE RESPONSIBLE: Reno, Nevada
SERIES ESTABLISHED: Surprise Valley-Home Camp Area, California and Nevada, 1974.
REMARKS: The classification of the series is changed (5/2000) based on optical grain counts of volcanic glass and field investigation of the series.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from 0 to 7 inches (A, Bw1 and part of Bw2 horizons)
Cambic horizon - The zone from 2 to 10 inches (The Bw1 and Bw2 horizons)
Paralithic contact - The contact at 10 inches (Cr horizon)
The particle size control section - The zone from 0 to 10 inches (The A, Bw1, and Bw2 horizons)
Mineralogy - Glass content of the .2 to 2 millimeter fraction is more than 30 percent.