LOCATION SHROE NVEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Aridic Argixerolls
TYPICAL PEDON: Shroe gravelly loam, woodland. (Colors are for dry soil unless otherwise noted.) The surface is partially covered with 5 percent cobbles and 20 percent pebbles.
A--0 to 5 inches; brown (10YR 5/3) gravelly loam, dark brown (10YR 3/3) moist; moderate thick platy structure; soft, very friable, nonsticky and slightly plastic; many very fine and fine roots; many very fine and fine vesicular pores; 3 percent cobbles; 20 percent pebbles; neutral (pH 7.0); abrupt smooth boundary. (3 to 6 inches thick)
Bt1--5 to 13 inches; brown (7.5YR 4/2) very gravelly clay loam, dark brown (7.5YR 3/2) moist; strong medium subangular blocky structure; hard, firm, very sticky and plastic; many very fine and fine and common medium roots; common very fine and fine interstitial and tubular pores; common thin clay films on faces of peds; 40 percent pebbles; neutral (pH 7.2); clear smooth boundary. (5 to 9 inches thick)
Bt2--13 to 36 inches; brown (7.5YR 5/4) very gravelly sandy clay loam, dark brown (7.5YR 4/4) moist; common medium prismatic structure parting to strong fine angular blocky; hard, firm, very sticky and plastic; common very fine through medium and few coarse roots; common very fine and fine interstitial and tubular pores; common thin clay films on faces of peds; 50 percent pebbles; mildly alkaline (pH 7.4); clear smooth boundary. (12 to 18 inches thick)
2C--36 to 60 inches; light brown (7.5YR 6/4) loam, strong brown (7.5YR 5/6) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine and fine roots; common very fine and fine interstitial and tubular pores; 5 percent pebbles; mildly alkaline (pH 7.4)
TYPE LOCATION: Lincoln County, Nevada; in Barnes Canyon, approximately 1 mile south of the southwest corner of section 31, T. 4 S., R. 68 E.; 37 degrees, 32 minutes, and 4 seconds north latitude, 114 degrees, 25 minutes, and 38 seconds west longitude.
RANGE OF CHARACTERISTICS:
Soil moisture - Usually dry, moist in winter and early spring and for 10 to 20 days cumulative during July through October due to convection storms.
Soil temperature - 47 to 50 degrees F.
Thickness of mollic epipedon - 7 to 13 inches.
Thickness of argillic horizon - 20 to 36 inches.
Control section - Clay content: 27 to 35 percent.
Rock Fragment: 35 to 50
Bt1 horizon - Hue: 10YR or 7.5YR.
Value: 3 or 4
Chroma: 2 through 4 dry, 2 or 3 moist.
Clay content: 35 to 45.
Texture of the fine earth: Sandy clay, clay loam, or clay.
Rock fragments: 35 to 50 percent.
Structure: Moderate to strong, medium or fine subangular blocky.
Consistence: Slightly hard or hard.
Reaction: Slightly acid or neutral.
Bt2 horizon - Hue: 7.5YR or 5YR.
Value: 4 or 5 dry, 3 or 4 moist.
Chroma: 3 or 4.
Clay content: 20 to 35 percent.
Texture of the fine earth: Sandy clay loam or clay loam.
Rock fragments: 35 to 50 percent.
Structure: Weak to moderate, medium or coarse prismatic, parting to moderate angular blocky.
2C horizon - Loamy lacustrine sediments.
Other features: Thin lime coats may occur on undersides of rock fragments in some pedons.
COMPETING SERIES: These are the Ashue(WA), Badena(T NV), Badenaugh(CA), Collard(UT), Eaglerock(NV), Grinrod(T WA), Ister(NV), Lemm(NV), Leviathan(NV), Nosrac(NV), Oest(NV), Searles(NV), Searvar(T CA), Shree(NV), Tollgate(NV), Trid(NV) and Tristan(NV) series. Ashue, Badena, Collard, Lemm, Leviathan, Nosrac, Shree, Tollgate and Tristan soils have less than 35 percent clay in the Bt2 horizon. Badena soils contain more than 60 percent coarse fragment in the particle size control section. Badenaugh soils are greater than 60 inches to the base of the Bt horizon. Oest soils contain 18 to 25 percent clay in the particle size control section. Eaglerock, Grinrod, Ister, Searles, Searvar and Trid soils have a lithic or paralithic contact at depths of 20 to 40 inches.
GEOGRAPHIC SETTING: Shroe soils are on old valley fill terraces and fan piedmonts at elevations of 5000 to 6200 feet. Slopes range from 2 to 30 percent. These soils formed in alluvium from ignimbrite and old lacustrine sediments influenced by small amounts of pyroclastic materials. The climate is cool continental. The mean annual precipitation is 10 to 14 inches; the annual temperature is 45 to 52 degrees F., and the frost-free season is 110 to 130 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Acoma, Cedaran, Itca, and Minu soils. Acoma soils lack mollic epipedons. Cedaran and Itca soils have mean annual soil temperatures of less than 47 degrees F. and have lithic contacts within a depth of 20 inches. Minu soils are shallow to an indurated duripan.
DRAINAGE AND PERMEABILITY: Well drained; medium or rapid runoff; slow permeability.
USE AND VEGETATION: Woodland and wildlife habitat. The dominant vegetation is Utah juniper with an understory of big sagebrush, rabbitbrush, squirreltail, and needleandthread.
DISTRIBUTION AND EXTENT: East-central Nevada. Shroe soils are moderately extensive. MLRA 28A,28B,29.
MLRA OFFICE RESPONSIBLE: Reno, Nevada
SERIES ESTABLISHED: Lincoln County (Meadow Valley Area), Nevada, 1971.
REMARKS: The type location was moved in 1990 to better reflect the series concept.
Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 13 inches (A1, A2, and Bt1 horizons).
Argillic horizon - The zone from 5 to 36 inches (Bt1 and Bt2 horizons).
Particle-size control section - The zone from 5 to 25 inches (Bt1 and part of the Bt2 horizons).
Aridic feature - Soil has an Ustic soil moisture that borders on Aridic.