LOCATION BRUFFY                  NV

Established Series
Rev. WMA/ELS/JBF
11/2016

BRUFFY SERIES

The Bruffy series consists of very deep, well drained soils that formed in alluvium derived from mixed rocks. Bruffy soils are on slough channels and floodplains. Slopes are 0 to 4 percent. The mean annual precipitation is about 230 mm and the mean annual temperature is about 6.5 degrees C.

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, calcareous, frigid Xeric Torrifluvents

TYPICAL PEDON: Bruffy silt loam--rangeland. (Colors are for dry soil unless otherwise noted.)

A1--0 to 5 cm; very pale brown (10YR 7/3) silt loam, dark brown (10YR 3/3) moist; weak thick platy structure; soft, very friable, slightly sticky and nonplastic; many very fine roots; many very fine vesicular and tubular pores; neutral (pH 7.0); abrupt smooth boundary. (0 to 15 cm thick)

A2--5 to 18 cm; very pale brown (10YR 7/3) silt loam, brown (10YR 4/3) moist; moderate thin platy structure; soft, very friable, moderately sticky and slightly plastic; common very fine roots; many very fine tubular pores; slightly effervescent; moderately alkaline (pH 8.2); clear wavy boundary. (10 to 20 cm thick)

C--18 to 46 cm; very pale brown (10YR 7/3) silt loam, brown (10YR 5/3) moist; moderate fine subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; common very fine roots; common very fine tubular pores; 10 percent cylindrical durinodes; slightly effervescent; moderately alkaline (pH 8.0); abrupt wavy boundary. (0 to 30 cm thick)

Ab--46 to 58 cm; dark grayish brown (10YR 4/2) silt loam, very dark gray (10YR 3/1) moist; moderate fine granular structure; soft, very friable, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; slightly effervescent; moderately alkaline (pH 8.2); abrupt wavy boundary. (10 to 25 cm thick)

2Ck--58 to 71 cm; light gray (10YR 7/2) gravelly sandy clay loam, grayish brown (10YR 5/2) moist; massive; slightly hard, friable, moderately sticky and moderately plastic; few very fine roots; many very fine interstitial pores; 15 percent hard durinodes; strongly effervescent; strongly alkaline (pH 9.0); clear wavy boundary. (0 to 25 cm thick)

3Ck--71 to 89 cm; pale brown (10YR 6/3) gravelly fine sandy loam, brown (10YR 4/3) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; many very fine interstitial and tubular pores; strongly effervescent; strongly alkaline (pH 9.0); clear wavy boundary. (0 to 30 cm thick)

4C--89 to 152 cm; light brownish gray (10YR 6/2) gravelly sand, brown (10YR 4/3) moist; single grained; loose, nonsticky and nonplastic; many very fine interstitial pores; slightly effervescent; strongly alkaline (pH 8.6).

TYPE LOCATION: Eureka County, Nevada; Eureka County airport; approximately 2,250 feet east of the northwest corner of section 16, T.20N., R.53E.; USGS Devon Peak 7.5 minute topographic quadrangle; latitude 39 degrees 36 minutes 11 degrees N and 116 degrees 0 minutes 36 degrees W; WGS84 Decimal Degrees 39.6030556 latitude, -116.0100000 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry; moist in winter and spring; aridic soil moisture regime bordering on xeric.
Mean annual soil temperature: 7 to 8 degrees C.
Depth to the unconformable sand and gravel: 76 to 122 cm
Other features: Buried A horizons usually occur within the particle-size control section.

Particle-size control section - Clay content: Averages 18 to 35 percent with 20 to 35 percent in the upper part and 5 to 10 percent in the lower part and 8 to 18 percent in between.
Rock fragments: 10 to 25 percent in the upper part and 10 to 35 in the lower part.

A horizons
Hue: 10YR or 2.5Y.
Value: 6 or 7 dry, 3 through 5 moist.
Chroma: 2 or 3.
Structure: Weak or moderate thin to thick platy or is massive.
Reaction: Neutral through moderately alkaline.
Calcium carbonate equivalent: 0 to 15 percent.
Electrical conductivity (EC): 0 to 4 millimhos/cm.

C horizon
Hue: 10YR or 2.5Y.
Value: 6 or 7 dry, 3 through 5 moist.
Chroma: 2 or 3.
Texture: Stratified silty clay through fine sandy loam.
Rock fragments: Average 10 to 25 percent, but sonme strata may contain up to 35 percent.
Calcium carbonate equivalent: 1 to 15 percent.
Electrical conductivity (EC): 2 to 8 millimhos/cm.

Ab horizon
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 1 or 2.
Calcium carbonate equivalent: 1 to 15 percent.
Electrical conductivity (EC): 2 to 8 millimhos/cm.

2Ck, 3Ck and 4C horizons
Hue: 10YR or 2.5Y.
Value: 6 or 7 dry, 3 through 5 moist.
Chroma: 2 or 3.
Texture: Stratified gravelly sand through very gravelly sandy loam.
Calcium carbonate equivalent: 1 to 15 percent.
Electrical conductivity (EC): 2 to 4 millimhos/cm.
Sodicity (SAR): 5 to 12.
Other features: Up to 15 percent durinodes can occur in 1 or more horizons. Relict redox features are in some pedons.

COMPETING SERIES: There are no other series in this family.

GEOGRAPHIC SETTING: Bruffy soils are in slough channels and floodplains Elevations are 1,750 to 2,020 meters. Slopes are 0 to 4 percent. The soils formed in moderately fine textured alluvium derived from mixed parent rocks. The climate is cool, semiarid continental with an average annual precipitation of about 200 to 250 mm. The mean annual temperature is 6 to 7 degrees C. The growing season is about 90 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Shipley and Kobeh soils. Shipley soils have coarse-loamy particle-size control sections. Kobeh soils have loamy-skeletal particle-size control sections.

DRAINAGE AND PERMEABILITY: Well drained; slow runoff; moderately slow permeability; high saturated hydraulic conductivity.

USE AND VEGETATION: Livestock grazing and irrigated cropland. Principal crops are small grains and alfalfa. The principal vegetation is big sagebrush, annuals, shadscale, and black greasewood.

DISTRIBUTION AND EXTENT: High elevation valleys in central and northeastern Nevada. The series is inextensive. MLRA 28B

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

SERIES ESTABLISHED: Eureka County (Diamond Valley Area), Nevada, 1971.

REMARKS: Bruffy soils were formerly classified as Alluvial soils.

Diagnostic horizons and features recognized in this pedon:
Ochric epipedon - The zone from the soil surface to 18 cm (A1 and A2 horizons).
Particle-size control section - The zone from 25 to 100 cm (Ab, 2Ck, 3Ck and part of C and 4C horizons).

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National Cooperative Soil Survey
U.S.A.