LOCATION BLOOR                   NV+CA ID

Established Series
Rev. PWB/DD/RLB/JBF
02/2016

BLOOR SERIES


The Bloor series consists of very deep, moderately well drained soils that formed in alluvium derived from mixed rocks with a component of loess. Bloor soils are on fan skirts, axial stream flood plains and alluvial flats. Slopes are 0 to 8 percent. The mean annual precipitation is about 200 mm and the mean annual temperature is about 9 degrees C.

TAXONOMIC CLASS: Fine-silty, mixed, superactive, mesic Durinodic Xeric Natrargids

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

A--0 to 13 cm; light brownish gray (10YR 6/2) silt loam, dark brown (10YR 3/3) moist; moderate thick platy structure parting to moderate very thin platy; soft, very friable, slightly sticky and slightly plastic; many very fine and few fine roots; many very fine vesicular pores; moderately alkaline (pH 8.4); clear wavy boundary. (5 to 28 cm thick)

E--13 to 20 cm; light gray (10YR 7/2) very fine sandy loam, brown (10YR 4/3) moist; moderate very thin platy structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine roots with pockets of many very fine roots; many very fine vesicular and few very fine tubular pores; moderately alkaline (pH 8.4); abrupt wavy boundary. (0 to 10 cm thick)

Btn1--20 to 30 cm; pale brown (10YR 6/3) silty clay loam, brown (10YR 4/3) moist; moderate medium prismatic structure; hard, friable, moderately sticky and very plastic; common very fine roots; few very fine tubular pores; many moderately thick clay films on faces of peds and lining pores; few iron-manganese concretions present; few 5 to 10 mm vertical root channels filled with soil; strongly alkaline (pH 8.6); clear wavy boundary. (10 to 30 cm thick)

Btn2--30 to 41 cm; very pale brown (10YR 7/3) silty clay loam, yellowish brown (10YR 5/4) moist; common fine distinct very dark grayish brown (10YR 3/2) and black (10YR 2/1) moist iron-manganese coatings; weak medium and coarse prismatic structure parting to moderate fine and medium angular blocky; hard, firm, moderately sticky and very plastic; common very fine roots; few very fine tubular pores; common moderately thick clay films on faces of peds and lining pores; 10 percent, 10 to 15 mm weak durinodes; strongly alkaline (pH 8.6); clear irregular boundary. (0 to 25 cm thick)

Btkqy--41 to 50 cm; very pale brown (10YR 7/3) silty clay loam, yellowish brown (10YR 5/4) moist; moderate fine and medium angular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; common very fine roots; few very fine tubular pores; common thin clay films on faces of peds and lining pores; 45 percent, 10 to 30 mm weak durinodes; few fine secondary carbonates and gypsum filaments; strongly effervescent; moderately alkaline (pH 8.4); clear wavy boundary. (0 to 10 cm thick)

Bkqy--50 to 66 cm; very pale brown (10YR 8/3) silt loam, light yellowish brown (10YR 6/4) moist; few fine distinct brownish yellow (10YR 6/6) and dark yellowish brown (10YR 4/4) moist iron mottles; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; few very fine tubular pores; 25 percent, 5 to 15 mm weak durinodes; common fine gypsum filaments; strongly effervescent; strongly alkaline (pH 8.8); clear wavy boundary. (0 to 30 cm thick)

Bkq--66 to 107 cm; very pale brown (10YR 8/2) silt loam, very pale brown (10YR 7/3) moist; massive; hard, firm, slightly sticky and slightly plastic; few very fine roots; few very fine tubular pores; 25 percent, 5 to 15 mm weak durinodes; few thin (less than one-half mm) discontinuous horizontal silica laminae; violently effervescent; very strongly alkaline (pH 9.2); clear wavy boundary. (13 to 79 cm thick)

2Bky1--107 to 137 cm; very pale brown (10YR 8/2) sandy loam, very pale brown (10YR 7/3) moist; massive; soft, very friable, nonsticky and nonplastic; few very fine roots; few very fine tubular pores; few fine gypsum filaments; violently effervescent; very strongly alkaline (pH 9.2); clear wavy boundary. (13 to 43 cm thick)

2Bky2--137 to 150 cm; very pale brown (10YR 8/3) sandy loam, very pale brown (10YR 7/4) moist; massive; soft, very friable, nonsticky and nonplastic; few very fine roots; few very fine tubular pores; 10 percent gravel; common fine gypsum filaments; violently effervescent; strongly alkaline (pH 8.6).

TYPE LOCATION: Elko County, Nevada; approximately 11 miles southeast of Elko about 2,200 feet east and 100 feet north of the southwest corner of section 12, T. 33 N., R. 56 E.; USGS Boyd Reservoir 7.5 minute topographic quadrangle; latitude 40 degrees 45 minutes 08 seconds N and longitude 115 degrees 36 minutes 56 seconds W; WGS84 Decimal Degrees 40.752222240.7522222 latitude, -115.6155556 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry, moist in the winter and spring, dry mid-June through October; aridic soil moisture regime bordering on xeric. Seasonal water table is 150 to 180 cm.
Soil temperature: 8 to 12 degrees C.
Depth to carbonates: 23 to 84 cm.
Depth to silica cementation: 38 to 76 cm.
Depth to iron concentrations: 25 to 107 cm.
Other features: Some pedons have AB horizons above the Btn horizon.

Particle-size control section - Clay content: 27 to 35 percent.

A horizon and AB horizon or E horizon (when present)
Hue: 2.5Y or 10YR.
Value: 5 through 7 dry, 3 or 4 moist.
Value of E horizon is one unit higher than that of the overlying horizon.
Chroma: 2 or 3.
Reaction: Moderately alkaline through very strongly alkaline.
Other features: Buried A horizons are in some pedons.

Bt horizon
Hue: 2.5Y or 10YR.
Value: 4 through 7 dry, 3 through 5 moist.
Chroma: 2 through 5.
Texture: Silty clay loam with thin subhorizons of clay loam.
Structure: Prismatic or columnar, usually parting to angular or subangular blocky. Commonly subangular or angular blocky in lower part.
Consistence: Sticky or very sticky and plastic or very plastic, wet.
Reaction: Moderately alkaline to very strongly alkaline.
Durinodes: Commonly 10 to 50 percent in the lower subhorizon.
Exchangeable sodium: 15 to 45 percent.
Effervescence: Noneffervescent through strongly effervescent.
Other features: Iron manganese concretions are common in most pedons.

Bqky and Bqk horizons
Hue: 2.5Y or 10YR.
Value: 6 through 8 dry, 3 through 6 moist.
Chroma: 2 through 4.
Texture: Silt loam or loam; sandy loam layers are in the lower part of some pedons.
Clay content: 10 to 18 percent.
Structure: Massive or subangular blocky near krotovinas.
Cementation: Discontinuously weakly silica cemented or have 20 to 50 percent durinodes. Layers with consistence that is hard, firm and brittle are in most pedons.
Consistence: Soft to hard, dry; very friable to firm, moist.
Reaction: Strongly alkaline or very strongly alkaline.
Effervescence: Strongly effervescent or violently effervescent.
Other features: Some pedon may have a small amount of mica in some subhorizons, gypsum is usually present in some subhorizon between 38 to 100 cm, but may not be present in some pedons.

Bky horizon
Hue: 2.5Y or 10YR.
Value: 7 or 8 dry, 3 through 5 moist.
Chroma: 2 through 4.
Texture: Stratified sandy loam to silty clay loam.
Clay content: Averages 10 to 20 percent.
Rock fragments: 0 to 20 percent, mainly gravel.
Structure: Massive; subangular blocky near krotovinas.
Reaction: Strongly alkaline or very strongly alkaline.
Effervescence: Strongly effervescent or violently effervescent.
Other features: May have a small amount of mica.

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: Bloor soils are on fan skirts, lake plain, axial stream flood plains and alluvial flats. These soils formed in alluvium derived from mixed rocks with a component of loess. Slopes are 0 to 8 percent. Elevations are 1,220 to 1,770 meters. The climate is cool, semiarid with warm, dry summers and cool, moist winters. The mean annual precipitation is 150 to 300 mm; mean annual temperature is 8 to 11 degrees C, and the frost-free season is 80 to 120 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Connel, Enko, Hunnton, Kelk and Ocala series. Hunnton soils have a fine argillic horizon. Enko, Kelk, Connel and Ocala soils lack argillic horizons. In addition Ocala soils are somewhat poorly drained.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Moderately well drained; slow or medium runoff; moderately low saturated hydraulic conductivity.

USE AND VEGETATION: Rangeland and wildlife habitat. The present vegetation is mainly big sagebrush, black greasewood, shadscale, rubber rabbitbrush, Douglas rabbitbrush, bottlebrush squirreltail, basin wildrye, saltgrass, Sandberg bluegrass and cheatgrass.

DISTRIBUTION AND EXTENT: Northeast and north-central Nevada and southeastern Idaho. These soils are extensive. MLRA 24, 25 and 28A.

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

SERIES ESTABLISHED: Elko County, Nevada, Central Part, 1986.

REMARKS: The classification was changed from Durixerollic Natrargids to Durinodic Xeric Natrargids in 12/94.

Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 20 cm (A and E horizons).
Natric horizon - The zone from about 20 to 50 cm (Btn1, Btn2 and Btqk horizons).
Duric horizon - The zone from about 50 to 107 cm (Bqky and Bqk horizons).
Particle-size control section - The zone from 20 to 50 cm (Btn1, Btn2 and Btqk horizons).


National Cooperative Soil Survey
U.S.A.