LOCATION ARDIVEY                 NV

Established Series
Rev. JBF/WED/JVC
05/2016

ARDIVEY SERIES

The Ardivey series consists of very deep, well drained soils that formed in alluvium derived from mixed rocks. Ardivey soils are on fan remnants. Slopes are 2 to 15 percent. The mean annual precipitation is about 150 mm and the mean annual temperature is about 12 degrees C.

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Durinodic Haplargids

TYPICAL PEDON: Ardivey very gravelly loam--rangeland. (Colors are for dry soil unless otherwise noted.)

A--0 to 8 cm; very pale brown (10YR 7/3) very gravelly loam, dark grayish brown (10YR 4/2) moist; moderate very coarse subangular blocky structure; slightly hard, very friable, moderately sticky and slightly plastic; few very fine roots; many very fine vesicular and tubular pores; 2 percent stones, 10 percent cobbles, and 45 percent gravel; noneffervescent; moderately alkaline (pH 8.2); abrupt smooth boundary. (5 to 20 cm thick)

Bt1--8 to 15 cm; brown (10YR 5/3) very gravelly clay loam, dark yellowish brown (10YR 4/4) moist; moderate medium and fine subangular blocky structure; soft, very friable, moderately sticky and moderately plastic; many very fine and few fine roots; many very fine tubular pores; few thin clay films on faces of peds and in pores; 30 percent gravel and 5 percent cobbles; thin lime and silica coatings on the underside of some gravel and cobbles; noneffervescent; moderately alkaline (pH 8.2); abrupt smooth boundary. (8 to 23 cm thick)

Bt2--15 to 25 cm; yellowish brown (10YR 5/4) very gravelly clay loam, dark yellowish brown (10YR 4/4) moist; weak medium prismatic that parts to moderate medium subangular blocky structure; hard, very friable, moderately sticky and moderately plastic; many very fine and few fine roots; many very fine tubular pores; 40 percent gravel and 5 percent cobbles; common thin clay films on faces of peds and in pores; some gravel have thin lime and silica coating the underside; noneffervescent; neutral (pH 7.0); clear smooth boundary. (0 to 13 cm thick)

2Btqk--25 to 43 cm; pale brown (10YR 6/3) extremely gravelly loam, brown (10YR 4/3) moist; weak medium and fine subangular blocky structure; hard, very friable, slightly sticky and slightly plastic; many very fine and few fine roots; many very fine tubular pores; few thin clay films coating and bridging sand grains; 50 percent gravel and 20 percent cobbles; common fine lime and silica coating on most gravel and cobbles; noneffervescent; moderately alkaline (pH 8.3); clear smooth boundary. (10 to 33 cm thick)

3Bqk--43 to 152 cm; very pale brown (10YR 7/3) extremely gravelly loamy sand, brown (10YR 4/3) moist; massive; slightly hard, very friable, nonsticky and nonplastic; many very fine and few fine roots; 60 percent gravel, 25 percent cobbles, and 2 percent stones; 20 percent discontinuous strong lime and silica cemented layers with 35 percent durinodes; plates and pendants; violently effervescent; strongly alkaline (pH 8.6).

TYPE LOCATION: Nye County, Nevada; about 0.7 mile west of State Route 8A and .5 mile north of Park Canyon Road; approximately 2,100 feet north and 1,585 feet west of the southeast corner of section 13, T. 13 N., R. 42 E.; USGS Carvers NW 7.5 minute topographic quadrangle; latitude 38 degrees 59 minutes 16 seconds N and longitude 117 degrees 12 minutes 15 seconds W; WGS84 Decimal Degrees 38.9878889 latitude, -117.204444 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry, moist in some part for short periods during winter and early spring and for 10 to 20 days cumulative between July through October following summer convection storms; typic aridic soil moisture regime.
Mean annual soil temperature: 12 to 15 degrees C.

Particle-size control section - Clay content: 18 to 35 percent.
Rock fragments: 35 to 60 percent, mainly gravel.

A horizon
Hue: 10YR or 2.5Y.
Value: 6 or 7 dry, 3 or 4 moist.
Chroma: 2 or 3.
Reaction: Moderately alkaline or strongly alkaline.
Effervescence: Noneffervescent or slightly effervescent.

Bt horizons
Value: 5 or 6 dry, 3 through 5 moist.
Chroma: 2 through 4.
Reaction: Neutral to moderately alkaline.
Structure: Weak or moderate prismatic or subangular blocky.
Texture: Very gravelly, sandy clay loam, very gravelly clay loam, or very gravelly loam.
Consistence: Soft to hard dry, very friable to firm moist.
Effervescence: Noneffervescent or slightly effervescent. Strongly effervescent in lower part of some pedons.

Btqk or Btk horizons
Value: 5 or 6 dry, 3 or 4 moist.
Chroma: 2 through 4.
Structure: Massive or subangular blocky
Texture: Very gravelly coarse sandy loam, very gravelly loam or extremely gravelly loam.
Consistence: Slightly hard to hard dry, very friable to firm moist.

Bqk horizon
Value: 6 through 8 dry, 4 through 6 moist.
Chroma: 2 or 3.
Consistence: Slightly hard to very hard dry, very friable to very firm moist.
Rock fragments: 50 to 70 percent gravel, 5 to 30 percent cobbles and 0 to 10 percent stones.
Silica cementation: Many lime coatings and pendants on underside of rock fragments and contains weakly cemented lenticular layers.
Reaction: Moderately alkaline to very strongly alkaline.
Other features: 20 to 60 percent weakly to strongly discontinuous silica and lime cementation.

COMPETING SERIES: This is the Redflame series. Redflame soils have a mean annual temperature of 6 to 10 degrees F. and does not receive summer precipitation.

GEOGRAPHIC SETTING: Ardivey soils are on fan remnants. These soils formed in mixed alluvium dominantly from volcanic rocks, tuff, shale and granitic rocks. Elevations are 1,178 to 2,091 meters. Slopes are 2 to 15 percent. The mean annual precipitation is 100 to 200 mm. The mean annual temperature is 11 to 14 degrees C and the frost-free season is 120 to 140 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Izo, Spanel, and Wardenot soils. Izo and Wardenot soils lack argillic horizon and are sandy-skeletal. Spanel soils are loamy and have a duripans.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; moderately high saturated hydraulic conductivity.

USE AND VEGETATION: Ardivey soils are used for livestock grazing. The vegetation is principally Bailey's greasewood, shadscale, bud sagebrush, galleta, Indian ricegrass, and bottlebrush squirreltail.

DISTRIBUTION AND EXTENT: Central Nevada. These soils are extensive with about 102,000 acres of the series mapped to date. The series concept and main acreage is in MLRA 29, while other acreage occurs in MLRA 27.

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

SERIES ESTABLISHED: Nye County (Big Smoky Valley Area), Nevada, 1972.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 8 cm (A horizon).
Argillic horizon - The zone from 8 to 43 cm (Bt1, Bt2, and 2Btqk horizons).
Cemented durinodes - The zone from 43 to 152 cm (3Bqk horizon).
Identifiable secondary carbonates - The zone from 25 to 152 cm (2Btqk and 3Bqk horizons).
Particle-size control section - The zone from 8 to 43 cm (Bt1, Bt2, and 2Btqk horizons).

ADDITIONAL DATA: NASIS User pedon ID 2006NV023901.

---

National Cooperative Soil Survey
U.S.A.