LOCATION HAARVAR                 NV

Established Series
Rev. JFS-EWB-WED-JBF
06/2016

HAARVAR SERIES

The Haarvar series consists of shallow, well drained soils that formed in residuum derived from tertiary sedimentary rock. Haarvar soils are on rock pediment remnants, hills and low mountains. Slopes are 4 to 50 percent. The mean annual precipitation is about 200 mm and the mean annual temperature is about 12 degrees C.

TAXONOMIC CLASS: Clayey, smectitic, calcareous, mesic, shallow Xeric Torriorthents

TYPICAL PEDON: Haarvar gravelly clay loam--rangeland. (Colors are for dry soil unless otherwise noted.) The soils surface is partially covered with 20 percent gravel.

A--0 to 3 cm; brown (10YR 5/3) gravelly clay loam, brown (10YR 4/3) moist; massive; slightly hard, very friable, very sticky and very plastic; few fine and medium roots; common very fine and fine interstitial and few fine tubular pores; 20 percent gravel; slightly effervescent; moderately alkaline (pH 8.2); clear wavy boundary. (3 to 8 cm thick)

C1--3 to 10 cm; light yellowish brown (10YR 6/4) clay, yellowish brown (10YR 5/4) moist; massive; slightly hard, very friable, very sticky and very plastic; common fine and few medium roots; few very fine interstitial and few fine tubular pores; 10 percent gravel; slightly effervescent; moderately alkaline (pH 8.2); clear wavy boundary. (5 to 20 cm thick)

C2--10 to 30 cm; pale yellow (5Y 7/4) clay, pale olive (5Y 6/4) moist; massive; hard, very firm, very sticky and very plastic; many fine and few medium roots; few very fine interstitial pores; slightly effervescent; moderately alkaline (pH 8.4); abrupt wavy boundary. (0 to 25 cm thick)

Cr--30 cm; tertiary sedimentary rock.

TYPE LOCATION: Mineral County, Nevada about 500 feet west and 2,000 feet north of the southeast corner of section 15, T. 7 N., R. 36 E., latitude 38 degrees 27 minutes 45 seconds N and longitude 117 degrees 57 minutes 05 seconds W; WGS84 Decimal Degrees 38.4626111 latitude, -117.9513889 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Moist in winter and spring, dry in summer and fall, except for 10 to 20 days cumulative between July and October due to convection storms; aridic soil moisture regime bordering bordering on xeric.
Soil temperature: 12 to 15 degrees C.
Depth to soft rock: 25 to 50 cm.
Profile reaction: Slightly alkaline or moderately alkaline.
Profile carbonates: Slightly effervescent or strongly effervescent.

Particle-size control section - Clay content: 40 to 55 percent.
Rock fragments: 5 to 10 percent.

A horizon
Value: 5 or 6 dry, 4 or 5 moist.
Chroma: 2 or 3 dry or moist.

C horizon
Hue: 10YR, 2.5Y, 5Y.
Value: 6 or 7 dry, 5 or 6 moist.
Chroma: 2 through 6 dry or moist.
Clay content: 40 to 55 percent.
Structure: Massive or angular blocky.
Rock fragments: 0 to 10 percent.

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

GEOGRAPHIC SETTING: Haarvar soils are on rock pediment remnants, hills and low mountains. These soils formed in residuum derived from tertiary sedimentary rock. Slopes are 4 to 50 percent. Elevations are 1,830 to 2,140 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 10 to 12 degrees C, and the frost-free season is 100 to 130 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Kyler, Stewval and Wrango series. Kyler and Stewval soils are less than 50 cm deep to a lithic contact. Stewval soils have an argillic horizon. Wrango soils are greater than 150 cm to bedrock and have a sandy-skeletal particle-size control section.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; medium to rapid runoff; moderately low saturated hydraulic conductivity.

USE AND VEGETATION: Livestock grazing and wildlife habitat. The present vegetation is mainly black sagebrush, Nevada ephedra, spiny menodora, bottlebrush squirreltail, Indian ricegrass and galleta.

DISTRIBUTION AND EXTENT: West-central Nevada. These soils are not extensive.

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

SERIES ESTABLISHED: Mineral County, Nevada, 1985.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the surface to 18 cm (A, C1 and part of C2 horizons).
Paralithic contact - The boundary at 30 cm (Cr layer).
Particle-size control section - The zone from the surface to 30 cm (A, C1 and C2 horizons).

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National Cooperative Soil Survey
U.S.A.