LOCATION YOBE                    NV+CA

Established Series
Rev. JDH/WED/JVC/JBF
07/2016

YOBE SERIES

The Yobe series consists of very deep, somewhat poorly drained soils that formed in lacustrine deposits derived from mixed rocks. Yobe soils are on alluvial flats and lake plains. Slopes are 0 to 2 percent. The mean annual precipitation is about 125 mm and the mean annual temperature is about 12 degrees C.

TAXONOMIC CLASS: Fine-silty, mixed, superactive, calcareous, mesic Aeric Halaquepts

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

A--0 to 3 cm; light gray (10YR 7/1) silt loam, grayish brown (2.5Y 5/2) moist; massive; slightly hard, very friable, nonsticky and nonplastic; many very fine and few fine interstitial, and few fine tubular pores; very few 1.2 to 3.8 cm carbonate nodules; violently effervescent; very strongly alkaline (pH 9.4); abrupt smooth boundary. (0 to 10 cm thick)

C1--3 to 18 cm; light gray (10YR 7/2) silt loam, light brownish gray (2.5Y 6/2) moist; massive; soft, very friable, nonsticky and nonplastic; few fine and medium roots; many very fine interstitial pores; very few 1.2 to 3.8 cm carbonate nodules; violently effervescent; strongly alkaline (pH 9.0); clear wavy boundary. (15 to 28 cm thick)

C2--18 to 61 cm; light gray (10YR 7/2) silt loam, brown (10YR 5/3) moist; massive; slightly hard, very friable, slightly sticky and nonplastic; common micro and few medium roots; common very fine tubular pores; very few 1.2 to 3.8 cm carbonate nodules; violently effervescent; moderately alkaline (pH 8.4); clear wavy boundary. (0 to 70 cm thick)

2C--61 to 152 cm; very pale brown (10YR 7/3) silty clay loam, yellowish brown (10YR 5/4) moist; massive; slightly hard, very friable, moderately sticky and moderately plastic; few very fine and fine roots; common very fine and fine tubular pores; very few 1.2 to 3.8 cm carbonate nodules; violently effervescent; moderately alkaline (pH 8.4).

TYPE LOCATION: Nye County, Nevada; about 4.5 miles west-southwest of the mouth of Northumberland Canyon and about 0.4 mile west of an access road; approximately 1,300 feet west and 2,600 feet south of the northeast corner of section 9, T. 13 N., R. 44 E.; USGS East of Millett Ranch 7.5 minute topographic quadrangle; latitude 39 degrees 0 minutes 3 seconds N and longitude 117 degrees 2 minutes 11 seconds W; WGS84 Decimal Degrees 39.0009444 latitude, -117.0361111 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: The water table is at 90 to 120 cm for one month or more during most years and the capillary fringe moistens the soil to within at least 76 cm of the surface.
Mean annual soil temperature: 8 to 11 degrees C.
Sodicity (SAR): Greater than l3, decreasing with depth below 50 cm.

Particle-size control section - Clay content: 18 to 25 percent.

A horizon
Reaction: Strongly alkaline or very strongly alkaline.

C horizons
Hue: 10YR through 5Y.
Value: 6 through dry; 4 through 6 moist.
Chroma: 2 through 4, dry or moist.
Texture: Stratified very fine sandy loam to silty clay loam.
Effervescence: Strongly effervescent or violently effervescent.
Calcium carbonate equivalent: 5 to 10 percent.
Reaction: Moderately alkaline or strongly alkaline.
Other features: Carbonate nodules range from very few through common in most subhorizons.

COMPETING SERIES: These are the Bezo and Nuyobe series.

Bezo soils have 27 to 35 percent clay in the particle-size control section. Nuyobe soils have a mean annual soil temperature of more than 12 degrees C, and have seasonal high water tables at 30 to 90 cm.

GEOGRAPHIC SETTING: Yobe soils are on alluvial flats and lake plains. These soils formed in lacustrine deposits derived from mixed sources. Slopes are 0 to 2 percent. Elevations range from 1,220 to 1,830 meters. The mean annual precipitation is 100 to 200 mm, the mean annual temperature is 11 to 14 degrees C, and the frost-free period is 100 to 120 days.

GEOGRAPHICALLY ASSOCIATED SOILS: This is the Parran soil. Parran soils are fine textured and have a salic horizon.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained; negligible through medium surface runoff; moderately high saturated hydraulic conductivity. The water table fluctuates between depths of 90 and 180 cm.

USE AND VEGETATION: Yobe soils are used for livestock grazing and wildlife habitat. The vegetation is principally black greasewood, inland saltgrass, iodinebush, common reed, and big saltbush.

DISTRIBUTION AND EXTENT: Central Nevada and northeastern California. These soils are moderately extensive. The series concept and main acreage is in MLRA 28B, while other acreage occurs in MLRAs 23, 24, and 28A.

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

SERIES ESTABLISHED: Nye County (Big Smoky Valley Area), Nevada, l972.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 18 cm (A and C1 horizons).
Particle-size control section - The zone from 25 to 100 cm (parts of the C2 and 2C horizons).

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National Cooperative Soil Survey
U.S.A.