LOCATION RUSTIGATE NV
Established Series
Rev. JBF-WED-JVC
05/2016
RUSTIGATE SERIES
The Rustigate series consists of very deep, somewhat poorly drained soils that formed in alluvium derived from mixed rocks. Rustigate soils are on lake plains, lake terraces, alluvial flats, and stream terraces. Slopes are 0 to 4 percent. The mean annual precipitation is about 150 mm and the mean annual temperature is about 12 degrees C.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, calcareous, mesic Oxyaquic Torriorthents
TYPICAL PEDON: Rustigate silt loam--rangeland. (Colors are for dry soil unless otherwise noted.)
A1--0 to 8 cm; very pale brown (10YR 7/3) silt loam, brown (10YR 5/3) moist; moderate medium platy structure; soft, very friable, slightly sticky and slightly plastic; common very fine roots; violently effervescent; very strongly alkaline (pH 9.6); clear smooth boundary. (5 to 13 cm thick)
A2--8 to 25 cm; very pale brown (10YR 7/3) silt loam, yellowish brown (10YR 5/4) moist; weak thin platy structure parting to moderate medium granular; soft, very friable, slightly sticky and slightly plastic; common very fine roots; violently effervescent; moderately alkaline (pH 8.4); clear smooth boundary. (0 to 30 cm thick)
C1--25 to 51 cm; very pale brown (10YR 7/3) loam, yellowish brown (10YR 5/4) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; violently effervescent; strongly alkaline (pH 8.6); clear smooth boundary. (10 to 38 cm thick)
C2--51 to 84 cm; very pale brown (10YR 7/3) loam, brown (10YR 5/3) moist; massive; hard, firm, slightly sticky and slightly plastic; common very fine and fine roots; violently effervescent; strongly alkaline (pH 8.8); clear smooth boundary. (18 to 46 cm thick)
C3--84 to 102 cm; very pale brown (10YR 7/3) sandy loam, brown (10YR 4/3) moist; massive; soft, very friable, slightly sticky and nonplastic; violently effervescent; strongly alkaline (pH 8.6); clear smooth boundary. (18 to 56 cm thick)
C4--102 to 152 cm; pale brown (10YR 6/3) loam, brown (10YR 4/3) moist; massive; soft, very friable, slightly sticky and slightly plastic; violently effervescent; moderately alkaline (pH 8.4).
TYPE LOCATION: Churchill County, Nevada; about 41 miles east-northeast of Fallon in Dixie Valley; 1,900 feet south and 600 feet west of the northeast corner of section 21, T. 21 N., R. 35 E.; USGS Dixie Valley 7.5 minute topographic quadrangle; latitude 39 degrees 40 minutes 28 seconds N and longitude 118 degrees 02 minutes 42 seconds W; WGS84 Decimal Degrees 39.6744444 latitude, -118.0450000 longitude.
RANGE IN CHARACTERISTICS:
Soil moisture: Usually moist in some part of the moisture control section for short periods during winter and early spring, and for 10 to 20 days cumulative between July to October due to convection storms; typic aridic soil moisture regime.
Mean annual soil temperature: 12 to 15 degrees C.
Reaction: Moderately alkaline through very strongly alkaline (up to pH 9.6).
Salinity (EC): 0 to 4 mmhos/cm.
Sodicity (SAR): 1 to 12.
Effervescence: Slightly effervescent through violently effervescent.
Calcium carbonate equivalent: 1 to 20 percent.
Particle-size control section - Clay content: Averages 18 to 27 percent.
A horizons
Value: 6 through 8 dry, 3 through 6 moist.
Chroma: 2 through 4, dry or moist.
C horizons
Value: 6 through 8 dry, 3 through 5 moist.
Chroma: 2 through 4, dry or moist.
Texture: Loam or sandy loam; some pedons have silt loam below 100 cm from the soil surface.
Consistence: Soft to hard, very friable to firm, nonsticky or slightly sticky and nonplastic or slightly plastic.
COMPETING SERIES: These are the
Bastian,
Mikett,
Parohtog, and
Umbo series.
Bastain soils have horizons within 100 cm of the soil surface with 30 to 80 percent brittle peds due to accumulation of secondary silica.
Mikett soils have mean annual soil temperature of 9 to 11 degrees C. and have an aridic (torric) moisture regime that borders on ustic.
Parohtog and
Umbo soils have mean annual soil temperature of 8 to 11 degrees C.
GEOGRAPHIC SETTING: Rustigate soils are on lake plains, lake terraces, alluvial flats, and low stream terraces. They formed in alluvium derived from mixed rocks. Slopes are 0 to 4 percent. Elevations range from 1,030 to 1,920 meters. The climate is arid with cool, moist winters and warm, dry summers. The mean annual precipitation is 100 to 200 mm, the mean annual temperature is 11 to 13 degrees C, and the frost-free period is 120 to 140 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Louderback,
Settlement, and
Slaw soils. Louderback soils are sandy and somewhat poorly drained. Settlement soils are fine, poorly drained, and have sodium adsorption ratios of 13 to 30. Slaw soils are fine-silty, well drained, and stratified.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained; very low or low surface runoff; moderately high saturated hydraulic conductivity. Endosaturation is present with an apparent seasonal high water table between 90 and 152 cm (moderately deep and deep free water occurrence classes) between December and July. Cumulative annual duration class is Persistent. The saturated zone drops below 152 cm in August through November.
USE AND VEGETATION: Rustigate soils are used for livestock grazing with limited use for urban development and irrigated cropland. The vegetation is mainly black greasewood, seepweed, shadscale, inland saltgrass, alkali sacaton, and basin wildrye.
DISTRIBUTION AND EXTENT: Western, central, and southern Nevada. These soils are moderately extent. MLRAs 27, 28B, and 29.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California.
SERIES ESTABLISHED: Esmeralda County, Nevada, 1984.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 18 cm (A1 and part of the A2 horizons).
Endosaturation feature - The condition of ground water with an upper boundary between 90 and 152 cm for some time during normal years.
Particle-size control section - The zone from 25 to 100 cm (C1, C2, and C3 horizons).
National Cooperative Soil Survey
U.S.A.