LOCATION BARNMOT                 NV

Established Series
Rev. DJM/EWB/JVC
05/2016

BARNMOT SERIES

The Barnmot series consist of very deep, well drained soils that formed in colluvium derived from mixed rocks over lacustrine sediments. Barnmot soils are on terraces, hills, and fan remnants. Slopes are 8 to 75 percent. The mean annual precipitation is about 150 mm and the mean annual temperature is about 11.5 degrees C.

TAXONOMIC CLASS: Fine, smectitic, calcareous, mesic Typic Torriorthents

TYPICAL PEDON: Barnmot very gravelly clay--rangeland. (Colors are for dry soil unless otherwise noted.) The soil surface is covered with 45 percent gravel, 5 percent cobbles, and 1 percent stones.

A--0 to 5 cm; pale brown (10YR 6/3) very gravelly clay, brown (10YR 5/3) moist; moderate thin platy structure; soft, very friable, moderately sticky and moderately plastic; very few fine roots; common very fine interstitial and few very fine vesicular pores; 55 percent gravel and 5 percent cobbles; strongly effervescent; moderately alkaline (pH 8.2); abrupt smooth boundary. (3 to 13 cm thick)

C1--5 to 18 cm; pale brown (10YR 6/3) clay, brown (10YR 5/3) moist; weak medium prismatic structure; slightly hard, very friable, very sticky and moderately plastic; few very fine roots; many very fine interstitial and few very fine tubular pores; strongly effervescent; strongly alkaline (pH 8.5); clear wavy boundary. (8 to 25 cm thick)

C2--18 to 41 cm; pink (7.5YR 7/4) clay, brown (7.5YR 5/4) moist; moderate fine and medium prismatic structure; slightly hard very friable, very sticky and moderately plastic; few very fine roots; many very fine interstitial and few very fine tubular pores; strongly effervescent; strongly alkaline (pH 8.5); clear wavy boundary. (15 to 30 cm thick)

C3--41 to 152 cm; light gray (10YR 7/2) clay loam, brown (10YR 5/3) moist; strong very coarse subangular blocky structure; very hard, firm, very sticky and moderately plastic; few very fine roots between peds; few very fine and fine interstitial pores; slightly effervescent; moderately alkaline (pH 8.4).

TYPE LOCATION: Churchill County, Nevada; about 27 miles east of Fallon and 10 miles north of Frenchman near the south end of the Stillwater Range; 1,300 feet east and 1,300 feet north of the projected southwest corner of section 16, T. 18 N., R. 33 E.; USGS La Plata Canyon 7.5 minute topographic quadrangle; latitude 39 degrees 25 minutes 11 seconds N and longitude 118 degrees 17 minutes 24 seconds W; WGS84 Decimal Degrees 39.4197222 latitude, -118.2888889 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry in summer and autumn, and moist for short periods during spring and winter; typic aridic soil moisture regime.
Mean annual soil temperature: 12 to 13 degrees C.
Effervescence: Slightly effervescent or strongly effervescent.

Particle-size control section - Clay content: 35 to 55 percent.
Rock fragments: Less than 15 percent.

A horizon
Value: 5 through 7 dry, 4 or 5 moist.
Chroma: 2 or 3, dry or moist.

C horizons
Hue: 7.5YR through 2.5Y.
Value: 5 through 8 dry, 4 through 6 moist.
Chroma: 2 through 4, dry or moist.
Texture: Clay or clay loam.
Structure: Prismatic, subangular blocky, or massive.
Consistence: Slightly hard to very hard; very friable to firm; moderately sticky or very sticky.
Reaction: Moderately alkaline or strongly alkaline.
Salinity (EC): 0 to 8 mmhos/cm.
Sodicity (SAR): 1 to 12

COMPETING SERIES: These are the Benin, Deaver, Ragtown, and Stutzman series.

Benin soils have secondary carbonates and gypsum and have sodium adsorption ratios of 13 to 440. Deaver soils are moderately deep to paralithic contacts of soft shale. Ragtown soils are stratified, moderately well drained, and average 25 to 35 percent clay in the upper part of the control section. Stutzman soils have more than 40 percent silt in the control section and a mean annual soil temperature less than 12 degrees C.

GEOGRAPHIC SETTING: Barnmot soils are on terraces, hills, and fan remnants. They formed in colluvium derived from mixed rocks over lacustrine sediments. Slopes are 8 to 75 percent. Elevations range from 1,340 to 1,950 meters. The climate is cool-arid with cool, moist winters and hot, dry summers. The mean annual precipitation is 100 to 200 mm, the mean annual temperature is 10 to 12 degrees C, and the frost-free period is 100 to 120 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bluewing, Celeton, Kleinbush, Rednik, and Ricert soils. Bluewing soils are sandy-skeletal. Celeton soils are loamy, very shallow and shallow to paralithic contacts, and formed in residuum derived from diatomite. Kleinbush soils have natric horizons. Rednik soils are loamy-skeletal and have argillic horizons. Ricert soils are fine-loamy and have natric horizons.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; very high surface runoff; slow saturated hydraulic conductivity.

USE AND VEGETATION: Barnmot soils are used for livestock grazing and wildlife habitat. The vegetation is principally shadscale, Bailey greasewood, Nevada ephedra, Indian ricegrass, and bottlebrush squirreltail.

DISTRIBUTION AND EXTENT: Western Nevada. These soils are moderately extensive. MLRAs 27 and 29.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California.

SERIES ESTABLISHED: Mineral County Area, Nevada, 1985.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 5 cm (A horizon).
Particle-size control section - The zone from 25 to 100 cm (parts of the C2 and C3 horizons).

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National Cooperative Soil Survey
U.S.A.