LOCATION CLEMENTINE NVEstablished Series
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 3 inches; 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. (2 to 4 inches thick)
A2--3 to 12 inches; grayish brown (10YR 5/2) silty clay loam, very dark grayish brown (10YR 3/2) moist; moderate coarse subangular blocky structure; hard, friable, sticky and slightly plastic; many very fine and fine, few medium and coarse roots; common very fine tubular and interstitial pores; mildly alkaline. (pH 7.6); abrupt wavy boundary. (0 to 12 inches thick)
A3--12 to 20 inches; 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, sticky and plastic; many very fine, fine, medium and coarse roots; common very fine tubular and interstitial pores; mildly alkaline (pH 7.6); clear wavy boundary. (0 to 10 inches thick).
Ak--20 to 27 inches; 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, sticky and plastic; common very fine and fine, few medium and coarse roots; many very fine, few fine tubular pores; few, fine generally rounded soft lime masses; slightly effervescent matrix; moderately alkaline (pH 8.2); clear wavy boundary. (5 to 12 inches thick)
Bk1--27 to 33 inches; 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, sticky and plastic; few very fine and fine roots; many very fine tubular pores; common fine generally rounded soft lime masses; slightly effervescent; moderately alkaline, (pH 8.4); clear wavy boundary. (5 to 8 inches thick)
Bk2--33 to 44 inches; 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, sticky and plastic; few very fine and fine roots; many very fine tubular pores; many, fine, generally rounded soft lime masses; strongly effervescent; moderately alkaline, (pH 8.4); clear wavy boundary. (0 to 12 inches thick)
Bk3-44 to 58 inches; 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, sticky and plastic; few very fine and fine roots; many very fine tubular pores; few fine lime filaments; noneffervescent matrix; moderately alkaline (pH 8.4); clear wavy boundary. (0 to 20 inches thick)
Bk4-58 to 60 inches; 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, sticky and slightly plastic; few very fine roots; many very fine interstitial and few very fine tubular pores; slightly effervescent; lime is disseminated; moderately alkaline (pH 8.4)
TYPE LOCATION: Elko County, Nevada; approximately 8 miles northeast of the Squaw Valley Ranch, about 900 feet west and 1,700 feet south of the northeast corner of section 11, T. 39 N., R. 47 E.; 41 degrees, 16 minutes, 29 seconds north latitude and 116 degrees, 37 minutes, 42 seconds west 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.
Soil temperature - 47 to 53 degrees F.
Mollic epipedon thickness - 24 to 30 inches.
Depth to carbonates - 12 to 40 inches.
Other features - Few to common, fine, redox concentrations occur below depths of 12 inches.
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 to 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 40 inches in some pedons.
Structure: Subangular blocky or is massive.
Consistence: Friable or firm, moist, slightly sticky or 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 (IA), Catherine (OR), Clubcaf (VA), Colo (IA), Otter (IS), Sawmill (IL) and Whitewood (SD) soils. (Series are expected to be reclassified to this family.) The Afton, Clubcaf, Colo, Otter, Sawmill and Whitewood soils lack a dry summer period and have mean annual precipitation of more than 25 inches. In addition, Afton and Whitewood soils have B horizons. Colo soils have B horizons and range from neutral to medium acid in their profile. Otter soils range from neutral to mildly alkaline in their profile and Sawmill soils have B horizons and reaction of slightly acid to mildly alkaline in their solum. Catherine soils lack lime within depths of 20 to 40 inches and range from slightly acid to mildly alkaline in their solum.
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 4,000 to 5,800 feet. The climate is semi- arid with cool, moist winters and warm, dry summers. The mean annual precipitation is 8 to 10 inches; mean annual temperature is 45 to 52 degrees F.; 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 PERMEABILITY: Poorly drained; drained phases are recognized; slow or medium runoff; moderately slow permeability.
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 OFFICE RESPONSIBLE: Reno, Nevada
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 27 inches (A1, A2, A3 and Ak horizons).
Particle-size control section - The zone from 10 to 40 inches (part of A2, A3, Ak, Ck1 and part of Ck2 horizons).
"Classification was changed in 1992 from Haplaquolls to Endoaquolls."
The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Reno MLRA office, without review of the soil series property data. The remainder of this document has not been updated.