LOCATION RUSTY                   NV

Established Series
WMA/RPZ/JBF
05/2016

RUSTY SERIES

The Rusty series consists of very deep, well drained soils that formed in lacustrine sediments reworked by wind. The sediments are from mixed rock sources. These soils are on lake plains and have slopes of 0 to 8 percent. The mean annual precipitation is about 125 mm and the mean annual temperature is about 12 degrees C.

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Typic Natrargids

TYPICAL PEDON: Rusty sand, rangeland. (Colors are for dry soils unless otherwise noted.)

A1--0 to 8 cm; pale brown (10YR 6/3) sand, brown (10YR 5/3) moist; single grain; loose, nonsticky and nonplastic; many very fine and fine roots; many fine interstitial pores; moderately alkaline (pH 8.4); abrupt smooth boundary. (5 to 36 cm thick)

A2--8 to 23 cm; light gray (10YR 7/1) loamy sand, brown (10YR 4/3) moist; moderate medium and thick platy structure; slightly hard, very friable, nonsticky and nonplastic; few fine and medium roots; many very fine and fine interstitial pores, many fine vesicular pores in lower part; moderately alkaline (pH 8.4); abrupt irregular boundary. (8 to 25 cm thick)

2Btn--23 to 33 cm; pale brown (10YR 6/3) sandy clay loam, dark yellowish brown (10YR 4/4) moist; strong medium and coarse columnar structure; hard, very friable, moderately sticky and moderately plastic; many very fine and fine, and few medium roots; common fine tubular inped pores; common thin clay bridges and coatings on mineral grains; strongly alkaline (pH 8.6); clear, wavy boundary. (10 to 25 cm thick)

2Btnk--33 to 56 cm; brown (10YR 5/3) sandy clay loam, brown (10YR 4/3) moist; strong medium angular blocky structure; hard, friable, moderately sticky and moderately plastic; common very fine and fine, and few medium roots; many fine tubular pores; common thin clay coatings on mineral grains; many thin silt coatings on mineral grains; violently effervescent; common fine soft masses and filaments of carbonate; strongly alkaline (pH 8.8); clear smooth boundary. (20 to 30 cm thick)

3C--56 to 86 cm; very pale brown (10YR 7/3) stratified fine sandy loam and silt loam, brown (10YR 5/3) moist; massive; slightly hard, very friable, nonsticky and slightly plastic; few fine and medium roots; common fine tubular pores; slightly effervescent; strongly alkaline (pH 9.0); abrupt wavy boundary. (0 to 30 cm thick)

4C--86 to 102 cm; uncoated sand with many relict mottles that are strong brown (7.5YR 5/8) and strong brown (7.5YR 5/6) both dry and moist; single grain; loose, nonsticky and nonplastic; common fine and few medium roots; many fine interstitial pores; slightly effervescent; strongly alkaline (pH 8.6); clear wavy boundary. (0 to 20 cm thick)

5C--102 to 122 cm; very pale brown (10YR 7/3) silt loam, brown (10YR 5/3) moist; with many relict mottles that are strong brown (7.5YR 5/8) and strong brown (7.5YR 5/6) both dry and moist; massive; slightly hard, very friable, nonsticky and slightly plastic; few fine roots; common tubular and few vesicular pores; slightly effervescent; strongly alkaline (pH 9.0); clear smooth boundary. (15 to 50 cm thick)

6C--122 to 152 cm; uncoated sand with many relict mottles that are strong brown (7.5YR 5/8) and strong brown 7.5YR 5/6) both dry and moist; single grain; loose, nonsticky and nonplastic; many fine and few medium roots; many very fine and fine interstitial pores; slightly effervescent; moderately alkaline (pH 8.0)

TYPE LOCATION: Lyon County, Nevada; about l/4 mile east of U.S. Highway 95A and 200 feet south of Fir Avenue in Silver Springs; approximately 200 feet south and 300 feet east of the northwest corner of section 6, T. l7 N. R. 25 E.; USGS Silver Springs South, NV 7.5 minute topographic quadrangle; latitude 39 degrees 22 minutes 26 seconds N and longitude 119 degrees 13 minutes 47 seconds W; WGS84 Decimal Degrees 39.3747222 latitude, -119.230000 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Moist in winter and early spring, dry from late spring through fall; typic aridic soil moisture regime.
Mean annual soil temperature: 12 to 14 degrees C.
Depth to base of argillic: 50 to 86 cm.

Particle-size control section - Clay content: 20 to 27 percent.

A horizons
Value: 6 or 7 dry, 4 or 5 moist.
Chroma: l through 3.
Structure: Blocky, platy, or single grain.
Reaction: Neutral through moderately alkaline.

2Btn and 2Btnk horizons
Hue: l0YR or 7.5YR.
Value: 5 through 7 dry, 4 or 5 moist.
Chroma: 3 or 4.
Structure: Prismatic or columnar in upper part. Some pedons have angular blocky structure in the lower part.
Reaction: Strongly alkaline or very strongly alkaline.

C horizons
Texture: Stratified lacustrine sand to silt loam; clayey textures are below 100 cm in some pedons.
Reaction: Slightly alkaline through strongly alkaline.
Effervescence: Noneffervescent or slightly effervescent.

COMPETING SERIES: These are the Azabache, Fajada, Hadden, Highrock, Leebench, Leeko, Muff, Pizene, Recapture. Swasey, Terlco, Thermosprings and Uffens series.

Azabache soils have horizons with more than 35 percent rock fragments within 100 cm. Fajada, Muff and Hadden soils have a paralithic contact within 100 cm. Highrock, Homko and Leeko soils have 27 to 35 percent clay in the particle-size control section. Leebench soils have a mean annual soil temperature of 8 to 9 degrees C. Pizene soils have a mean annual soil temperature of 10 to 12 degrees C. Recapture soils have a Hue of 2.5YR or 5YR in the natric and C horizons. Swasey soils have hard bedrock within 100 cm. Thermosprings are moist for 10 to 20 days cumulative in summer due to convection storms. Terlco soils have 15 to 35 percent gravel in the particle-size control section. Uffens soils are moderately or strongly calcareous, have an A horizon less than 15 cm thick, and the C horizon is within 50 cm.

GEOGRAPHIC SETTING: Rusty soils are on lake plains at elevations of 1,250 to 1,340 meters. Slopes are 0 to 8 percent. The soils formed in lacustrine sediments reworked by wind. The sediments are derived from mixed parent materials. The climate is warm, continental arid, with mean annual precipitation of 100 to 150 mm. The mean annual temperature is 11 to 13 degrees C.; the frost-free season ranges from l20 to l40 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Express, Hawsley, Hough, and Patna series. Express and Hawsley soils lack an argillic horizon. Patna soils are coarse-loamy. Hough soils have less than 15 percent exchangeable sodium in the B2t horizon and are fine-loamy over sandy or sandy-skeletal.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; slow runoff; moderately low saturated hydraulic conductivity.

USE AND VEGETATION: Urban development, rangeland, and wildlife habitat. Native vegetation is Bailey greasewood, shadscale, Douglas rabbitbrush, rubber rabbitbrush, and Indian ricegrass.

DISTRIBUTION AND EXTENT: Western Nevada. The soils are of small extent. MLRA 27.

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

SERIES ESTABLISHED: Lyon County Area, Nevada, l98l.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The surface to 23 cm (A1 and A2 horizons).
Natric horizon - 23 to 56 cm (Btn and Btnk horizons).
Particle-size control section - 23 to 56 cm (Btn and Btnk horizons).

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National Cooperative Soil Survey
U.S.A.