LOCATION STUMBLE NV+NMEstablished Series
TAXONOMIC CLASS: Mixed, mesic Typic Torripsamments
TYPICAL PEDON: Stumble loamy sand--rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 6 inches; light brownish gray (10YR 6/2) loamy sand, dark grayish brown (10YR 4/2) moist; single grain; loose, nonsticky and nonplastic; many fine roots; moderately alkaline (pH 8.3); clear smooth boundary. (3 to 7 inches thick)
C1--6 to 14 inches; light brownish gray (10YR 6/2) loamy sand, brown (10YR 4/3) moist; massive; slightly hard, very friable, nonsticky and nonplastic; many fine roots; many fine and very fine tubular pores; moderately alkaline (pH 8.3); clear smooth boundary. (6 to 16 inches thick)
C2--14 to 29 inches; light brownish gray (10YR 6/2) loamy sand, brown (10YR 4/3) moist; massive; soft, very friable, nonsticky and nonplastic; many fine roots; many fine and very fine tubular pores; strongly effervescent; moderately alkaline (pH 8.3); clear smooth boundary. (6 to 26 inches thick)
C3--29 to 60 inches; light brownish gray (10YR 6/2) gravelly loamy sand, brown (10YR 4/3) moist; massive; soft, very friable, nonsticky and nonplastic; common fine roots; many very fine pores; slightly effervescent; moderately alkaline (pH 8.4).
TYPE LOCATION: Lincoln County, Nevada; approximately 500 feet south and 500 feet west of the northeast corner of section 15, T. 4 S., R. 54 E.; USGS White Blotch Springs 7.5 minute topographic quadrangle; latitude 37 degrees 36 minutes 24.84 seconds N. and longitude 115 degrees 53 minutes 27.25 seconds W., NAD83.
RANGE IN CHARACTERISTICS:
Soil moisture - Usually dry, moist in some part for short periods during winter and early spring, and for 10 to 20 day cumulative between July and October due to convection storms; Typic torric moisture regime.
Mean annual soil temperature - 53 to 59 degrees F.
Control section - Rock fragments: 5 to 35 percent, dominantly pebbles in some horizon. Lithology of fragments is mixed.
A horizon
Value: 6 or 7 dry, 4 or 5 moist.
Chroma: 2 or 3, dry or moist.
Reaction: Neutral to moderately alkaline.
C1 and C2 horizons
Hue: 10YR or 2.5Y.
Value: 6 or 7 dry, 4 or 5 moist.
Chroma: 2 or 3, dry or moist.
Texture: Loamy sand or loamy fine sand, with strata of fine sand and sand.
Structure: Single grain, massive, or weak subangular blocky.
Consistence: Soft or slightly hard.
Salinity (EC): 0 to 4 mmhos/cm.
Sodicity (SAR): 0 to 5.
Effervescence: Slightly effervescent to violently effervescent.
Calcium carbonate equivalent: 1 to 5 percent.
C3 horizon
Texture: Gravelly loamy sand or gravelly loamy fine sand with strata of fine sand and sand.
Structure: Single grain, massive, or weak subangular blocky.
Reaction: Moderately alkaline or strongly alkaline.
Salinity (EC): 0 to 8 mmhos/cm.
Sodicity (SAR): 0 to 5.
Effervescence: Slightly effervescent to violently effervescent.
Calcium carbonate equivalent: 1 to 5 percent.
Other features: A clayey substratum phase is recognized in Nevada with texture of clay below 40 inches. This phase also has sodium adsorption ratio as high as 12 and calcium carbonate equivalent as high as 10 percent.
COMPETING SERIES: These are the Als, Ecklund, Hawsley, Isolde, Kawich, Kewake, Razito, Sheppard, Sundown, Tipper, Tipperary, Tricera, and Yenrab series.
Als soils have mean annual soil temperature of 47 to 50 degrees F., do not have gravelly strata above 40 inches, and are not intermittently moist for 10 to 20 days during summer months. Ecklund soils are moderately deep to lithic contacts. Hawsley soils are dominantly sand or fine sand. Isolde soils are dominantly fine sand or sand and have no rock fragments. Kawich soils are calcareous throughout and are fine sand. Kewake soils have mean annual soil temperature of 47 to 53 degrees F. and are not intermittently moist for 10 to 20 days during summer months. Razito soils have 0 to 5 percent rock fragments in the particle-size control section. Sheppard soils have 5YR hue. Sundown soils are calcareous throughout. Tipper soils are moderately deep to paralithic contacts. Tipperary soils have mean annual soil temperature of 47 to 53 degrees F. Tricera soils have mean annual soil temperature of 47 to 50 degrees F. and are not intermittently moist for 10 to 20 days during summer months. Yenrab soils are calcareous throughout and have 20 to 50 percent exchangeable sodium.
GEOGRAPHIC SETTING: Stumble soils are on inset fans, fan skirts, pediments, alluvial flats, alluvial fans, sand sheets, and fan aprons. In New Mexico these soils also occur on fan remnants. They formed in eolian sand and alluvium derived from mixed rocks. Slopes are mainly 0 to 15 percent in Nevada. In New Mexico slopes range up to 40 percent on backslopes of fan remnants. Elevations range from 4,000 to 6,000 feet in Nevada. In New Mexico, elevations range to 6,400 feet. The mean annual precipitation is 5 to 8 inches, the mean annual temperature is 47 to 55 degrees F., and the frost-free period is 130 to 160 days. In New Mexico mean annual precipitation ranges from 8 to 10 inches, most of which comes from convective storms between July and September.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Fang, Jarboe, Papoose, Tickapoo, and Timper soils. Fang soils are coarse-loamy. Jarboe soils are fine-loamy, have carbonatic mineralogy, and calcic horizons with carbonate concretions. Papoose soils are fine-loamy, very deep, and have argillic horizons. Tickapoo soils are clayey, shallow to duripans, and have argillic horizons. Timper soils are loamy and shallow to duripans.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; rapid permeability (high saturated hydraulic conductivity).
USE AND VEGETATION: Stumble soils are used for rangeland and wildlife habitat. The vegetation is mainly littleleaf horsebrush, low Douglas rabbitbrush, desert needlegrass, fourwing saltbush, and Indian ricegrass.
DISTRIBUTION AND EXTENT: Southern and western Nevada. These soils are extensive with about 238,000 acres of the series mapped in Nevada. MLRAs 27 and 29 in Nevada. These soils have also been mapped in MLRA 35 in northwestern and northcentral New Mexico.
MLRA OFFICE RESPONSIBLE: Reno, Nevada.
SERIES ESTABLISHED: Churchill County, Nevada (Fallon-Fernley Area), 1971.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 6 inches (A horizon).
Particle-size control section - The zone from 10 to 40 inches (C2 horizon and parts of the C1 and C3 horizons).