LOCATION WEISHAUPT               NV

Established Series
Rev. MAT-TM-JVC
05/2016

WEISHAUPT SERIES

The Weishaupt series consists of very deep, somewhat poorly drained soils that formed in alluvium over lacustrine deposits derived from mixed igneous rocks. Weishaupt soils are on flood plains on deltas. Slopes are 0 to 1 percent. The mean annual precipitation is about 127 mm and the mean annual temperature is about 12 degrees C.

TAXONOMIC CLASS: Fine-loamy over clayey, mixed over smectitic, superactive, calcareous, mesic Cumulic Vertic Endoaquolls

TYPICAL PEDON: Weishaupt clay loam--irrigated cropland. (Colors are for dry soil unless otherwise noted.)

Ap--0 to 13 cm; gray (10YR 5/1) clay loam, very dark gray (10YR 3/1) moist; weak medium and fine granular structure; hard, friable, very sticky and very plastic; many very fine, fine and medium roots; many fine and very fine tubular pores; slightly effervescent; moderately alkaline (pH 8.4); abrupt wavy boundary. (10 to 20 cm thick)

A--13 to 28 cm; gray (10YR 5/1) clay loam, very dark gray (10YR 3/1) moist; moderate medium and fine granular structure; hard, friable, very sticky and very plastic; many very fine through medium roots; many fine and very fine tubular pores; few worm casts; slightly effervescent; strongly alkaline (pH 8.6); clear smooth boundary. (10 to 20 cm thick)

Ak1--28 to 38 cm; grayish brown (10YR 5/2) clay loam, very dark grayish brown (10YR 3/2) moist; weak medium and fine granular structure; slightly hard, friable, very sticky and very plastic; many very fine and fine roots; many fine and very fine tubular pores; common worm casts; few pockets of dark gray (5Y 4/1) fine sandy loam and few coarse distinct black (10YR 2/1) moist stains of organic matter; strongly effervescent; secondary carbonates segregated as few medium distinct light gray (2.5Y 7/2) masses; strongly alkaline (pH 8.6); abrupt wavy boundary. (8 to 15 cm thick)

Ak2--38 to 58 cm; grayish brown (2.5Y 5/2) sandy clay loam, very dark grayish brown (2.5Y 3/2) moist; weak medium and fine granular structure; slightly hard, friable, moderately sticky and moderately plastic; many very fine and fine roots; many fine tubular pores; strongly effervescent; secondary carbonates segregated as few fine prominent very pale brown (10YR 8/2) masses; moderately alkaline (pH 8.4); clear wavy boundary. (15 to 25 cm thick)

2Byzgb1--58 to 79 cm; gray (5Y 5/1) clay, very dark gray (5Y 3/1) moist; moderate coarse angular and subangular blocky structure; hard, firm, very sticky and very plastic; common very fine roots; few fine tubular pores; many fine distinct dark brown (7.5YR 3/2) moist zones of iron depletion; many medium prominent white (10YR 8/1) salt and gypsum crystals along root channels and on faces of peds; moderately alkaline (pH 8.2); clear wavy boundary. (20 to 51 cm thick)

2Byzgb2--79 to 99 cm; gray (5Y 5/1) clay, very dark gray (5Y 3/1) moist; moderate fine subangular and angular blocky structure; hard, firm, very sticky and very plastic; few very fine dead roots; few very fine tubular pores; many fine prominent dark reddish brown (5YR 3/3) moist masses of iron accumulation; few medium prominent very pale brown (10YR 8/2) salt and gypsum crystals; moderately alkaline (pH 8.1); clear wavy boundary. (15 to 46 cm thick)

2Cyzg--99 to 152 cm; gray (5Y 5/1) clay, very dark gray (5Y 3/1) moist; moderate medium and fine subangular blocky structure; hard, firm, very sticky and very plastic; few very fine tubular pores; many coarse distinct very dark grayish brown (10YR 3/2) moist zones of iron depletion on faces of peds and many medium prominent dark reddish brown (5YR 3/3) moist masses of iron accumulation; few medium prominent very pale brown (10YR 8/2) gypsum and salt crystals; moderately alkaline (pH 8.2).

TYPE LOCATION: Churchill County, Nevada; about one mile north of Stillwater on the M. Weishaupt ranch; approximately 1,400 feet west and 1,300 feet south of the east quarter corner of section 6, T. 19 N., R. 31 E.; USGS Stillwater 7.5 minute topographic quadrangle; latitude 39 degrees 32 minutes 15.71 seconds N. and longitude 118 degrees 32 minutes 34.51 seconds W.; WGS84 Decimal Degrees 39.5376972 latitude, -118.5429194 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Saturated with water at some period during the year or are artificially drained.
Mean annual soil temperature: 12 to 14 degrees C.
Mollic epipedon thickness: 76 to 122 cm; includes the Ak and 2Ab horizons.
Effervescence: Calcareous in all parts at depths between 25 and 50 cm.
Depth to lacustrine deposits: 41 to 86 cm.
Linear extensibility (LE): 6 to 9 cm between the soil surface and 100 cm.
Salinity and sodicity: Distinct soluble salts and sodium bulge occurs normally immediately above or at the top of the unconformable clayey materials in most cultivated areas. Salt and exchangeable sodium are highest at the surface in native areas.
Other features: Organic carbon content decreases irregularly with depth.

Particle-size control section - Clay content: 25 to 35 percent in the loamy upper part over 55 to 70 percent in the strongly contrasting lower part.

A horizons
Hue of 10YR through 5Y or neutral (N).
Value: 3 through 5 dry, 2 or 3 moist.
Chroma: 0 through 2. The yellow and neutral hues occur only in the lower part of the mollic epipedon.
Texture: Clay loam, silty clay loam, or sandy clay loam high in very fine sand.
Redoximorphic features: Distinct or prominent dark colored redox concentrations occur at depths of 45 to 75 cm.
Reaction: Slightly alkaline through strongly alkaline; highest pH values are immediately the fine textured horizons.
Calcium carbonate equivalent: 1 to 10 percent.
Gypsum content: 0 to 1 percent.
Organic matter content: 1 to 3 percent.

2Bb and 2C horizons
Hue: 2.5Y, 5Y, or neutral (N).
Value: 5 through 7 dry, 3 through 5 moist.
Chroma: 0 through 2, dry or moist.
Texture: Clay or silty clay.
Clay content: 55 to 70 percent.
Reaction: Moderately alkaline or strongly alkaline.
Calcium carbonate equivalent: 0 to 5 percent.
Gypsum content: 0 to 2 percent.
Organic matter content: 0.5 to 2 percent.

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

GEOGRAPHIC SETTING: Weishaupt soils are on smooth flood plains on deltas. They formed in alluvium over lacustrine deposits derived from mixed igneous rocks. Slopes are 0 to 1 percent. Elevations range from 1158 to 1219 meters. The climate is arid with cool, moist winters and hot, dry summers. The mean annual precipitation is 100 to 150 mm. The mean annual temperature is 11 to 13 degrees C., the mean January temperature is -1 to 0 degrees C., and the mean July temperature is 21 to 22 degrees C. The frost-free period is 120 to 140 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Carson and Stillwater soils. Carson soils are very-fine and higher shrink-swell properties. Stillwater soils are fine textured and have thinner mollic epipedons.

DRAINAGE AND PERMEABILITY: Somewhat poorly drained in most areas where diversion of water for irrigation and artificial drainage have altered the drainage; very slow permeability (low saturated hydraulic conductivity). Endosaturation is present with an apparent seasonal high water table between 3 and 5 feet (moderately deep or deep free water occurrence classes) between March and July. Cumulative annual duration class is Common.

USE AND VEGETATION: Weishaupt soils are irrigated and cultivated. The principal crops are small grains, sugar beets, alfalfa, and pasture. The native vegetation in rangeland is black greasewood and inland saltgrass.

DISTRIBUTION AND EXTENT: Western Nevada. These soils are not extensive with about 2,000 acres of the series mapped to date. MLRA 27.

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

SERIES ESTABLISHED: Churchill County (Fallon-Fernley Area), Nevada, 1971.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

Mollic epipedon - The zone from the soil surface to 99 cm (Ap, A, Ak1, Ak2, 2Byzgb1, and 2Byzgb2 horizons).

Identifiable secondary carbonates - The zone from 28 to 58 cm (Ak1 and Ak2 horizons).

Major lithologic discontinuity - The change to clayey material at 58 cm (2Byzgb1 horizon).

Aquic conditions - The conditions of endosaturation, reduction, and redoximorphic features between 91 and 152 cm at certain times during normal years (parts of the 2Byzgb2 and 2Cyzg horizons).

Particle-size control section - The zone from 25 to 100 cm (Ak1, Ak2, and 2Byzgb2 horizons and parts of the A and 2Cyzg horizons)


The revision of May 2004 updated the taxonomic class from Fine-loamy over clayey, mixed over smectitic, superactive, calcareous, mesic Cumulic Endoaquolls based on clay mineralogy and linear extensibility values in the NASIS database.

ADDITIONAL DATA: The typical pedon at the series type location has full characterization data by the Soil Survey Laboratory (SSL), Riverside, CA as user pedon ID 59NV001001 (pedon # 40A3227). The data is published on page 167 of Soil Survey Investigations Report No. 23.

---

National Cooperative Soil Survey
U.S.A.