LOCATION DIANEV                  NV

Established Series
Rev. WMA/RAF/GJS/JBF
01/2019

DIANEV SERIES

The Dianev series consists of very deep, somewhat poorly drained soils that formed in alluvium derived from mixed rocks including limestone, chert, dolostone, and volcanic ash. Dianev soils are on flood plains and low lake plain terraces. Slopes are 0 to 2 percent. The mean annual precipitation is about 230 mm and the mean annual temperature is about 7 degrees C.

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

TYPICAL PEDON: Dianev silty clay loam - rangeland. (Colors are for dry soil unless otherwise noted.)

A--0 to 5 cm; light gray (10YR 7/2) silty clay loam, dark grayish brown (10YR 4/2) moist; moderate very fine granular structure; slightly hard, friable, moderately sticky and moderately plastic; many fine and very fine vesicular pores; violently effervescent; very strongly alkaline (pH 9.6); abrupt smooth boundary. (5 to 18 cm thick)

C1--5 to 25 cm; light gray (10YR 7/2) heavy silty clay loam, brown (10YR 5/3) moist; moderate fine angular blocky structure; hard, friable, moderately sticky and moderately plastic; many medium, common fine and very fine roots; common fine, and many very fine tubular pores; violently effervescent; very strongly alkaline (pH 9.4); clear smooth boundary. (13 to 30 cm thick)

C2--25 to 66 cm; light gray (10YR 7/2) silty clay loam, brown (10YR 5/3) moist; weak medium platy structure; hard, friable, moderately sticky and moderately plastic; common very fine roots; many very fine tubular pores; violently effervescent; strongly alkaline (pH 9.0); clear smooth boundary. (0 to 64 cm thick)

C3--66 to 101 cm; light gray (10YR 7/2) silty clay loam, brown (10YR 5/3) moist; weak medium platy structure; hard, friable, moderately sticky and slightly plastic; few very fine roots; many very fine tubular pores; violently effervescent; strongly alkaline (pH 9.0); clear smooth boundary. (25 to 64 cm thick)

C4--101 to 152 cm; light gray (10YR 7/2) silty clay loam, pale brown (10YR 6/3) moist; common coarse faint brown (10YR 5/3) redox concentrations, moist; massive; hard, firm, moderately sticky and moderately plastic; violently effervescent; strongly alkaline (pH 8.6).

TYPE LOCATION: Eureka County, Nevada; approximately 12 miles northwest of Eureka in Kobeh Valley about 700 feet east and 1,250 feet south of the north- west corner of section 18, T. 20 N., R. 52 E.; USGS Hay Ranch 7.5 minute topographic quadrangle; latitude 39 degrees 35 minutes 59 second N and longitude 116 degrees 9 minutes 37 seconds W; WGS84 Decimal Degrees 39.5997222 latitude, -116.1602778 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Saturated within a depth of 76 to 100 cm for 1 month or more during most years; dry late July through October.
Mean annual soil temperature: 7 to 8 degrees C.

Particle size control section - Clay content: 20 to 30 percent.

A horizon
Hue: 10YR to 5Y.
Value: 5 to 7 dry, 3 to 6 moist.
Chroma: 1 to 3.
Structure: Platy or granular
Reaction: Strongly alkaline or very strongly alkaline.
Carbonates: Strongly effervescent or violently effervescent.
Electrical conductivity (EC): 4 to 32 millimhos/cm.
Sodicity (SAR): 13 to 45.

C1, C2 and C3 horizons
Hue: 10YR to 5Y.
Value: 6 to 8 dry, 3 to 6 moist.
Chroma: 1 to 3.
Texture: Silt loam or silty clay loam.
Structure: Platy or it is massive.
Reaction: Moderately alkaline or strongly alkaline.
Carbonates: Strongly effervescent or violently effervescent.
Electrical conductivity (EC): 4 to 32 millimhos/cm.
Sodicity (SAR): 13 to 45.
Redox or gleyed colors: Normally redoximorphic features or gleyed at some depth below 76 cm with hue of l0YR to 5Y or neutral. Gleyed colors have moist value of 4 to 6, and chroma of 0 to 3. Faint or distinct iron concentrations with chroma of 3 to 6 are common in some subhorizon of most pedons.
Other features: Lake sediments with a texture of stratified loamy sand to clay are found at a depth below 100 cm in some pedons.

C4 or 2C horizons
Hue: 10YR to 5Y.
Value: 6 to 8 dry, 3 to 6 moist.
Chroma: 1 to 3.
Texture: Stratified loamy fine sand to clay.
Electrical conductivity (EC): 8 to 16 millimhos/cm.
Sodicity (SAR) 5 to 12.
Redoximorphic features: Faint or distinct iron concentrations with chroma of 3 to 6 are common in some subhorizon of most pedons.
Gleyed colors: Moist value of 4 to 6, and chroma of 0 to 3.
Other features: Lake sediments with an A horizon are found at a depth below 100 cm in some pedons.

COMPETING SERIES: There are no other series in this family at the present time.

GEOGRAPHIC SETTING: Dianev soils are on flood plains and low lake plain terraces. These soils formed in alluvium derived from mixed rocks, including limestone, chert, dolostone, and volcanic ash. Slopes are 0 to 2 percent. Elevation are 1,740 to 2,190 meters. The climate is cool, semiarid with cool, moist winters and warm, dry summers. The mean annual precipitation is 200 to 250 mm, mean annual temperature is 6 to 7 degrees C, and the frost-free season is 70 to 100 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Sader, Shipley and Vinsad soils. Sader soils have a natric horizon. Shipley soils are coarse-loamy. Vinsad soils are coarse-loamy and have a salic horizon.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained; slow runoff or ponded; moderately low saturated hydraulic conductivity. Drained phases are recognized.

USE AND VEGETATION: Livestock grazing and wildlife habitat. The present vegetation is mainly black greasewood, alkali sacaton, and inland saltgrass on the strongly salt and sodium affected areas, and bluejoint ryegrass, basin wildrye, bottlebrush squirreltail, and rubber rabbitbrush where drained and less salt and sodium affected.

DISTRIBUTION AND EXTENT: North-central Nevada. These soils are moderately extensive. MLRA 28B.

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

SERIES ESTABLISHED: Eureka County Area (Diamond Valley Area), Nevada, l97l.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the surface to 18 cm. (A and part of the C1 horizons).
Redoximorphic concentrations - The zone from 101 to 152 cm (C4 horizon).
Seasonal water table - Saturated within a depth of 76 to 100 cm.
Particle-size control section - The zone from 25 to 100 cm (C2 and part of the C3 horizons).

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National Cooperative Soil Survey
U.S.A.