LOCATION DANGBERG NV

Established Series
Rev. DMC-ELS-JVC-JBF
03/2017

DANGBERG SERIES

The Dangberg series consists of moderately deep to a duripan, poorly drained soils that formed in alluvium derived mainly from granitic rock. Dangberg soils are on stream terraces and inset fans. Slopes are 0 to 2 percent. The mean annual precipitation is about 230 mm and the mean annual temperature is about 9 degess C.

TAXONOMIC CLASS: Fine, smectitic, mesic Aquic Natrargidic Natridurids

TYPICAL PEDON: Dangberg clay--meadow. (Colors are for dry soil unless otherwise noted.)

A--0 to 8 cm; gray (10YR 5/1) clay, very dark brown (10YR 2/2) moist; moderate medium and coarse subangular blocky structure; extremely hard, firm, very sticky and very plastic; many very fine and few fine roots; common very fine and fine interstitial pores; strongly alkaline (pH 8.6); abrupt wavy boundary. (5 to 13 cm thick)

Btkn1--8 to 38 cm; light brownish gray (10YR 6/2) clay, dark grayish brown (2.5Y 4/2) moist; weak very coarse prismatic structure; very hard, friable, very sticky and very plastic; many very fine and few fine roots; few very fine tubular and many very fine interstitial pores; many faint clay films on faces of peds, lining pores, and bridging mineral grains; slightly effervescent; secondary carbonates segregated as common fine strongly effervescent masses; strongly alkaline (pH 8.8); abrupt wavy boundary. (20 to 38 cm thick)

Btkn2--38 to 63 cm; light brownish gray (10YR 6/2) sandy clay, dark brown (10YR 3/3) moist; massive; very hard, friable, very sticky and very plastic; few very fine roots; few very fine tubular and many very fine interstitial pores; few fine and medium prominent dark brown (7.5YR 3/2) masses of iron and manganese accumulation, dark brown (7.5YR 3/2) moist; few faint clay films lining pores and common distinct clay films on faces of peds; slightly effervescent; secondary carbonates segregated as common fine and medium violently effervescent masses; strongly alkaline (pH 8.7); gradual wavy boundary. (18 to 33 cm thick)

Bqkm--63 to 109 cm; light brownish gray (10YR 6/2) cemented material, dark brown (10YR 3/3) moist; weak medium and thick platy structure; very hard, very firm, brittle; strongly cemented by opaline silica; few fine horizontal roots between plates; many fine interstitial pores; common medium prominent dark brown (7.5YR 3/3) masses of iron and manganese accumulation, dark brown (7.5YR 3/2) moist; slightly effervescent; secondary carbonates segregated as common fine, medium, and coarse violently effervescent masses and a few fine nodules; moderately alkaline (pH 8.4); abrupt smooth boundary. (38 to 70 cm thick)

2C--109 to 152 cm; pale brown (10YR 6/3) coarse sand, brown (10YR 4/3) moist; single grain; loose, nonsticky and nonplastic; many very fine and fine interstitial pores; many medium faint dark brown (7.5YR 3/2), prominent olive (5Y 5/6), and faint reddish brown (5YR 4/3) moist masses of iron accumulation; slightly effervescent; moderately alkaline (pH 8.2).

TYPE LOCATION: Douglas County, Nevada; in Carson Valley about 2 miles north of Minden; 600 feet south and 800 feet east of the north quarter corner of section 19, T. 13 N., R. 20 E.; USGS Minden 7.5 minute topographic quadrangle; latitude 38 degrees 58 minutes 53 seconds N and longitude 119 degrees 46 minutes 35 seconds W; WGS84 Decimal Degrees 38.9813889 latitude, -119.7763889 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry but are moist between depths of about 10 and 30 cm in the winter and spring, and are usually saturated below the duripan; aridic moisture regime that borders on xeric.
Mean annual soil temperature: 9 to 12 degrees C.
Ochric epipedon thickness: 5 to 13 cm.
Natric horizon thickness: 50 to 70 cm.
Depth to strongly cemented duripan: 60 to 84 cm.

Particle-size control section - Clay content: 35 to 55 percent.
Sand content: More than 35 percent.

A horizon
Hue: 10YR or 2.5Y.
Value: 5 or 6 dry, 2 or 3 moist.
Chroma: 1 or 2, dry or moist.
Reaction: Strongly alkaline or very strongly alkaline (up to pH 9.6).
Salinity (EC): 4 to 32 mmhos/cm.
Sodicity (SAR): 13 to 90.

Btkn1 and Btkn2 horizons
Value: 3 or 4 moist.
Chroma: 2 or 3, dry or moist.
Texture: Clay loam, clay, or sandy clay.
Reaction: Strongly alkaline or very strongly alkaline (up to pH 9.6).
Salinity (EC): 8 to 32 mmhos/cm.
Sodicity (SAR): 31 to 90.
Calcium carbonate equivalent: 1 to 5 percent.
Redoximorphic features: Redox concentrations occur in the Btkn2 horizon as masses of iron and manganese accumulation.

Bqkm horizon
Structure: Commonly is platy, but is massive in some pedons or in subhorizons of some pedons.

2C horizon
Texture: Coarse sand or sandy loam.
Clay content: 1 to 10 percent.
Reaction: Moderately alkaline through very strongly alkaline (up to pH 9.6).
Salinity (EC): 0 to 16 mmhos/cm.
Sodicity (SAR): 0 to 45.

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

GEOGRAPHIC SETTING: Dangberg soils are on smooth, linear or slightly concave areas of stream terraces and inset fans. These soils formed in alluvium derived mainly from granitic rock and partly from other igneous rocks and some metamorphic rocks. Slopes are 0 to 2 percent. Elevations range from 1,410 to 1,530 meters. The climate is semiarid with cool, moist winters and warm, dry summers. The mean annual precipitation is 200 to 250 mm, the mean annual temperature is 8 to 11 degrees C., and the frost-free period is 90 to 110 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Ormsby and Voltaire soils. Ormsby soils are sandy. Voltaire soils are fine-loamy and have mollic epipedons.

DRAINAGE AND SATURATED HYDRAULICCONDUCTIVITY: Poorly drained; very high surface runoff; very slow permeability; low saturated hydraulic conductivity. Endosaturation is present with an artesian seasonal high water table between 30 and 90 cm feet (shallow and moderately deep free water occurrence classes) between December and May. Cumulative annual duration class is Common. The drainage in some areas has been altered and may be very poorly drained due to irrigation water perched above the duripan or broken duripans allowing ground water under artesian pressure to rise higher than normal. Drained phases of this soil are also recognized. These soils are susceptible to rare flooding for very brief periods year-round or occasional flooding for brief periods between December and March.

USE AND VEGETATION: Dangberg soils are used for irrigated pasture and urban development. The vegetation is mainly inland saltgrass, clover, alkali bluegrass, carex, Rumex, and plantain. Potential native vegetation is black greasewood, basin big sagebrush, basin wildrye, and shadscale.

DISTRIBUTION AND EXTENT: Western Nevada. These soils are not extensive with about 3,200 acres of the series mapped to date. MLRA 26.

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

SERIES ESTABLISHED: Douglas County (Carson Valley Area), Nevada, 1975.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 8 cm (A horizon).
Natric horizon - The zone from 8 to 63 cm (Btkn1 and Btkn2 horizons).
Identifiable secondary carbonates - The zone from 8 to 109 cm (Btkn1, Btkn2, and Bqkm horizons).
Endosaturation feature - The condition of ground water with an upper boundary between 30 and 90 cm at certain times during normal years (parts of the Btkn1, Btkn2, and Bqkm horizons).
Duripan - The zone from 63 to 109 cm (Bqkm horizon).
Particle-size control section - The zone from 8 to 58 cm (Btkn1 horizon and part of the Btkn2 horizon).

National Cooperative Soil Survey
U.S.A.