LOCATION CLEMENTINE NV

Established Series
Rev. PWB/TSB/DD/JBF
12/2022

CLEMENTINE SERIES

The Clementine series consists of very deep, poorly drained soils that formed in alluvium derived from mixed rocks with influence from loess. The Clementine soils are on flood plains, stream terraces and inset fans. Slopes are 0 to 8 percent. The mean annual precipitation is about 230 mm and the mean annual temperature is about 10 degrees C.

TAXONOMIC CLASS: Fine-silty, mixed, superactive, mesic Cumulic Endoaquolls

TYPICAL PEDON: Clementine silt loam--rangeland. (Colors are for dry soil unless otherwise noted.)

A1--0 to 8 cm; grayish brown (10YR 5/2) silt loam, very dark grayish brown (10YR 3/2) moist; moderate medium platy structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and few fine roots; few very fine tubular and common very fine interstitial pores; neutral (pH 6.6); abrupt wavy boundary. (5 to 10 cm thick)

A2--8 to 30 cm; grayish brown (10YR 5/2) silty clay loam, very dark grayish brown (10YR 3/2) moist; moderate coarse subangular blocky structure; hard, friable, moderately sticky and slightly plastic; many very fine and fine, few medium and coarse roots; common very fine tubular and interstitial pores; slightly alkaline (pH 7.6); abrupt wavy boundary. (0 to 30 cm thick)

A3--30 to 51 cm; dark grayish brown (10YR 4/2) silty clay loam, black (10YR 2/1) moist; few fine distinct strong brown (7.5YR 4/6) iron mottles; moderate medium subangular blocky structure; hard, friable, moderately sticky and moderately plastic; many very fine, fine, medium and coarse roots; common very fine tubular and interstitial pores; slightly alkaline (pH 7.6); clear wavy boundary. (0 to 25 cm thick)

Ak--51 to 69 cm; grayish brown (10YR 5/2) silt loam, very dark grayish brown (10YR 3/2) moist; common fine distinct strong brown (7.5YR 4/6) iron mottles; few, fine manganese stains; moderate medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; common very fine and fine, few medium and coarse roots; many very fine, few fine tubular pores; few, fine generally rounded soft carbonate masses; slightly effervescent matrix; moderately alkaline (pH 8.2); clear wavy boundary. (13 to 30 cm thick)

Bk1--69 to 84 cm; light brownish gray (2.5Y 6/2) silty clay loam, dark grayish brown (2.5Y 4/2) moist, few, fine, distinct, strong brown (7.5YR 4/6) iron mottles; few fine manganese stains on peds; moderate medium, subangular blocky structure; hard, friable, moderately sticky and moderately plastic; few very fine and fine roots; many very fine tubular pores; common fine generally rounded soft carbonate masses; slightly effervescent; moderately alkaline, (pH 8.4); clear wavy boundary. (13 to 20 cm thick)

Bk2--84 to 112 cm; light brownish gray (2.5Y 6/2) silty clay loam, dark grayish brown (2.5Y 4/2) moist; few, fine, distinct strong brown (7.5YR 4/6) iron mottles; weak medium, subangular blocky structure; hard, friable, moderately sticky and moderately plastic; few very fine and fine roots; many very fine tubular pores; many, fine, generally rounded soft carbonate masses; strongly effervescent; moderately alkaline (pH 8.4); clear wavy boundary. (0 to 30 cm thick)

Bk3--112 to 147 cm; light brownish gray (2.5Y 6/2) clay loam, dark grayish brown (2.5Y 4/2) moist; common, fine, distinct strong brown (7.5YR 4/6) iron mottles; weak medium subangular blocky structure; hard, friable, moderately sticky and moderately plastic; few very fine and fine roots; many very fine tubular pores; few fine carbonate filaments; noneffervescent matrix; moderately alkaline (pH 8.4); clear wavy boundary. (0 to 20 cm thick)

Bk4--147 to 152 cm; light gray (2.5Y 7/2) loam, grayish brown (2.5Y 5/2) moist, common, fine, distinct strong brown (7.5YR 4/6) iron mottles; few fine manganese stains; massive; slightly hard, friable, moderately sticky and slightly plastic; few very fine roots; many very fine interstitial and few very fine tubular pores; slightly effervescent; carbonate is disseminated; moderately alkaline (pH 8.4)

TYPE LOCATION: Elko County, Nevada; about 900 feet west and 1,700 feet south of the northeast corner of section 11, T. 39 N., R. 47 E.; USGS Scraper Springs 7.5 minute topographic quadrangle; latitude 41 degrees 16 minutes 26 seconds N and longitude 116 degrees 37 minutes 36 seconds W; WGS84 Decimal Degrees 41.2738889 latitude, -116.6266667 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Saturated at or near the surface for one month or more during February through July. Drained phases are recognized.
Mean annual soil temperature: 8 to 12 degrees C.
Mollic epipedon thickness: 61 to 76 cm.
Depth to carbonates: 30 to 100 cm.
Other features: Few to common, fine, redox concentrations occur below depths of 30 cm.

Particle-size control section - Clay content: 25 to 35 percent.

A horizon
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 1 through 3 dry or moist.
Reaction: Neutral through strongly alkaline.

Bk horizon
Hue: 10YR or 2.5Y.
Value: 5 through 7 dry, 3 through 5 moist.
Chroma: 1 through 3 dry or moist.
Texture: Stratified silt loam or silty clay loam. Strata of loam or clay loam are below depths of 100 cm in some pedons.
Structure: Subangular blocky or is massive.
Consistence: Friable or firm, moist, slightly sticky or moderately sticky, wet.
Reaction: Moderately alkaline or strongly alkaline.
Other features: Few fine manganese stains are on peds in most pedons.

COMPETING SERIES: These are the Afton, Catherine, Colo, Humansville, Otter, Pastolla, Sawmill and Whitewood soils.

Afton, Humansville, Sawmill and Whitewood soils have Bg horizons. Catherine, Colo, Otter, Pastolla, soils lack carbonate within depths of 50 to 100 cm.

GEOGRAPHIC SETTING: Clementine soils are on flood plains, stream terraces and inset fans. These soils formed in alluvium derived from mixed rock with influence from loess and volcanic ash. Slopes are 0 to 8 percent. Elevations are 1,220 to 1,770 meters. The climate is semi-arid with cool, moist winters and warm, dry summers. The mean annual precipitation is 200 to 250 mm, mean annual temperature is 7 to 11 degrees C, and the frost-free season is 100 to 120 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Hunnton and Wieland soils. Hunnton soils are moderately deep to a duripan. Wieland soils have a weakly silica-cemented Bq horizons.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Poorly drained; drained phases are recognized; slow or medium runoff; moderately high saturated hydraulic conductivity.

USE AND VEGETATION: Rangeland and wildlife habitat. The present vegetation is mainly tufted hairgrass, Nevada bluegrass, sedges, and willows. Drained phases have mainly basin big sagebrush, basin wildrye, rubber rabbitbrush and Nevada bluegrass vegetation.

DISTRIBUTION AND EXTENT: Northeast Nevada. MLRA 25. The soils are not extensive.

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

SERIES ESTABLISHED: Northwest Elko County, Nevada, 1986.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the surface of the soil to a depth of about 69 cm (A1, A2, A3 and Ak horizons).
Zone of Endosaturation - The zone from 30 to 152 cm (A3, Ak, Bk1, Bk2 Bk3 and Bk4 horizons). Particle-size control section - The zone from 25 to 100 cm (part of A2, A3, Ak, Ck1 and part of Ck2 horizons).

Classification was changed in 1992 from Haplaquolls to Endoaquolls.

National Cooperative Soil Survey
U.S.A.