LOCATION JAMCANVAR               NV

Established Series
Rev. JBF/EWB
03/2017

JAMCANVAR SERIES

The Jamcanvar series consists of very deep, somewhat poorly drained soils that formed alluvium derived from mixed rocks and hot spring deposits. The Jamcanvar soils are on stream terraces. Slopes are 2 to 4 percent. The mean annual precipitation is about 230 mm and the mean annual temperature is about 10 degrees C.

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Aquic Haploxerolls

TYPICAL PEDON: Jamcanvar, loam--hayland. (Colors are for dry soil unless otherwise noted.)

Ap--0 to 23 cm; very dark gray (10YR 3/1) loam, black (10YR 2/1) moist; moderate fine and medium granular structure; slightly hard, friable, nonsticky and nonplastic; many fine and very fine roots; many fine and very fine interstitial pores; micaceous; neutral (pH 7.0); abrupt smooth boundary.

A--23 to 38 cm; very dark gray (10YR 3/1) sandy clay loam, black (10YR 2/1) moist; common faint very dark grayish brown (10YR 3/2) moist and few medium distinct dark reddish brown (5YR 3/3) moist iron redox concentrations; weak fine and medium granular structure; slightly hard, friable, moderately sticky and moderately plastic; common very fine and fine roots; few fine and medium wormholes; common fine tubular pores; micaceous; neutral pH 7.0); abrupt smooth boundary. (combined thickness of the A horizons is 38 to 50 cm)

Bk1--38 to 76 cm; about 65 percent very pale brown (10YR 8/2) and 35 percent grayish brown (10YR 5/2) sandy clay loam, dark grayish brown (10YR 4/2) moist; massive; slightly hard, friable, moderately sticky and moderately plastic; common very fine and fine roots; many very fine to medium tubular pores; violently effervescent; many soft carbonate masses; moderately alkaline pH 8.0); gradual wavy boundary. (30 to 60 cm thick)

Bk2--76 to 91 cm; pale brown (10YR 6/3) sandy loam, brown (10YR 4/3) moist; massive; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; micaceous; violently effervescent; common soft carbonate masses; moderately alkaline (pH 8.0); clear smooth boundary. (0 to 25 cm thick)

Cg1--91 to 107 cm; brown (10YR 5/3) loamy sand, brown (10YR 4/3) moist; few medium and coarse distinct reddish brown (5YR 4/4) moist iron redox concentrations; massive; soft, very friable, nonsticky and nonplastic; few very fine roots; many very fine and fine interstitial pores; micaceous; neutral pH 7.0); clear smooth boundary. (10 to 38 cm thick)

Cg2--107 to 135 cm; pale brown (10YR 6/3) loamy sand, brown (10YR 5/3) moist; few medium and coarse distinct reddish brown (5YR 5/4) moist iron redox concentrations; massive; soft, very friable, nonsticky and nonplastic; few very fine roots; common very fine and fine interstitial pores; neutral pH 7.0); abrupt smooth boundary. (0 to 38 cm thick)

Cg3--135 to 152 cm; pale brown (10YR 6/3) loamy coarse sand, brown (10YR 5/3) moist; many medium prominent strong brown (7.5YR 5/6) and common coarse distinct reddish brown (5YR 4/4) moist iron redox concentrations; massive; soft, very friable, nonsticky and nonplastic; highly micaceous; neutral pH 7.0).

TYPE LOCATION: Douglas County, Nevada; about 500 meters south and 200 meters east of the northwest corner of section 14, T. 14 N., R. 19 E. USGS Genoa 7.5 minute topographic quadrangle; latitude 39 degrees 4 minutes 49 seconds N and longitude, 119 degrees 49 minutes 23 seconds W; WGS84 Decimal Degrees 39.0802778 latitude, -119.8230556 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry in the moisture control section; moist winter and spring, usually dry summer and fall; aridic soil moisture regime that borders on xeric. Saturated within 50 to 75 cm during the late winter and early spring in most years.
Mean annual soil temperature: 9 to 11 degrees C.
Mollic epipedon thickness: 38 to 50 cm.

Particle-size control section - Clay content: Averages 18 to 25 percent.
Rock fragments: Less than 15 percent when averaged. Lithology of rock fragments is mainly igneous rock.

A horizons
Value: 3 or 4 dry.
Chroma: 1 or 2.
Reaction: Neutral through moderately alkaline.
Organic matter content: 2 to 4 percent.
Redox concentrations: Common faint iron redox concentrations are in the lower part of the A horizon in some pedons.

Bk horizons
Value: 5 through 8 dry, 4 or 5 moist.
Chroma: 2 or 3.
Texture: Sandy loam, loam or sandy clay loam.
Clay content: Averages 18 to 25 percent.
Rock fragment content: Less than 15 percent.
Consistence: Soft to slightly hard, very friable to friable, slightly sticky to sticky and slightly plastic to plastic.
Calcium carbonate equivalent: 20 to 40 percent.
Reaction: Moderately alkaline or strongly alkaline.

Cg horizons
Value: 5 or 6 dry, 4 or 5 moist.
Chroma: 3 or 4.
Texture: Stratified loamy sand or loamy coarse sand.
Redox concentrations: Few to many distinct to prominent iron redox concentrations.

COMPETING SERIES: This is the Lunsford series. Lunsford soils have a Bt horizon and a Bq horizon and lack a calcic horizon.

GEOGRAPHIC SETTING: Jamcanvar soils are on stream terraces. These soils formed in alluvium derived from mixed rocks and hot spring deposits. Slopes are 2 to 4 percent. Elevations are 1,435 to 1,550 meters. The climate is cool, semiarid with warm summers and moist winters. The mean annual precipitation is 200 to 250 mm; Mean annual temperature is 9 to 11 degrees C., and frost-free season is 100 to 120 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Holbrook, Jamescanny and Ophir soils. These soils all lack calcic horizons.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat Poorly drained, medium runoff; moderately low saturated hydraulic conductivity. Endosaturation is present with an apparent seasonal high water table between 50 and 75 cm (moderately deep free water occurrence class) between December and June. Cumulative annual duration class is common.

USE AND VEGETATION: Hayland, cropland and wildlife habitat.

DISTRIBUTION AND EXTENT: Valleys of western Nevada. These soils are not extensive. MLRA 26.

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

SERIES ESTABLISHED: MLRA 26 update, Nevada. 2012.

REMARKS:Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 38 cm. (Ap and A horizons)
Calcic horizon - The zone from 38 to 91 cm. (Bk1 and Bk2 horizons)
Aquic conditions - The conditions of endosaturation and reduction in horizons between 50 and 75 cm at certain times in normal years (lower Bk1, Bk2, Cg1, Cg2 and Cg3 horizons)
Particle-size control section - The zone from 25 to 100 cm. (A, Bk1, BK2 and upper Cg1 horizons)

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National Cooperative Soil Survey
U.S.A.