LOCATION EENREED                 NV

Established Series
Rev. EWB-RLB-JVC
02/2012

EENREED SERIES

The Eenreed series consists of very deep, well drained soils that formed in alluvium derived from quartzite and with local admixtures of shale and limestone. Eenreed soils are on fan remnants. Slopes are 4 to 50 percent. The mean annual precipitation is about 350 mm and the mean annual temperature is about 7 degrees C.

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Aridic Calcixerolls

TYPICAL PEDON: Eenreed very gravelly loam--rangeland. (Colors are for dry soil unless otherwise noted.) The soil surface is covered with approximately 80 percent gravel and less than 1 percent stones.

A1--0 to 5 cm; grayish brown (10YR 5/2) very gravelly loam, very dark grayish brown (10YR 3/2) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine roots; many very fine interstitial pores; 45 percent gravel; slightly alkaline (pH 7.8); abrupt smooth boundary. (5 to 10 cm thick)

A2--5 to 13 cm; grayish brown (10YR 5/2) very gravelly loam, dark brown (10YR 3/3) moist; weak fine and medium subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine, common fine, medium, and coarse roots; common very fine tubular and interstitial pores; 45 percent gravel; slightly alkaline (pH 7.8); abrupt smooth boundary. (0 to 10 cm thick)

Bt--13 to 30 cm; brown (10YR 5/3) very gravelly loam, dark brown (10YR 3/3) moist; weak fine and medium subangular blocky structure; slightly hard, friable, moderately sticky and slightly plastic; many very fine, common fine, medium, and coarse roots; common very fine tubular and interstitial pores; few faint clay films on faces of peds and lining pores; 50 percent gravel; strongly effervescent; moderately alkaline (pH 8.0); clear wavy boundary. (15 to 28 cm thick)

Bk1--30 to 119 cm; white (10YR 8/1) extremely gravelly loam, light gray (10YR 7/2) moist; massive, hard, firm, slightly sticky and slightly plastic; common very fine and few fine roots; few very fine tubular pores; 60 percent gravel, 5 percent cobbles, and 5 percent stones; many (20 percent) secondary calcium carbonate concretions around rock fragments and finely disseminated throughout the matrix; violently effervescent; moderately alkaline (pH 8.4); gradual wavy boundary. (38 to 89 cm thick)

Bk2--119 to 152 cm; very pale brown (10YR 8/2) extremely gravelly sandy loam, pale brown (10YR 6/3) moist; massive; hard, firm, slightly sticky and nonplastic; 60 percent gravel, 5 percent cobbles, and 5 percent stones; common (15 percent) secondary calcium carbonate concretions around rock fragments and finely disseminated throughout the matrix; violently effervescent; strongly alkaline (pH 8.6).

TYPE LOCATION: White Pine County, Nevada; 0.25 miles east of the Great Basin National Park about 0.75 miles south of Mill Creek; USGS Lehman Caves 7.5 minute topographic quadrangle; latitude39 degrees 02 minutes 25 seconds N and longitude 114 degrees 14 minutes 18 seconds W; UTM zone 11, 739022e, 4324870n, NAD 83.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually moist in winter and spring, dry in all parts at least 45 consecutive days following the summer solstice (July and August), but intermittently moist in the upper part for 10 to 20 days cumulative due to convection storms between July and September; aridic soil moisture regime that borders on xeric.
Mean annual soil temperature: 7 to 8 degrees C.
Mollic epipedon thickness: 18 to 40 cm; includes the Bt horizon.
Depth to effervescent matrix: 5 to 20 cm (upper 18 cm calcareous throughout when mixed).
Depth to secondary carbonates: 18 to 40 cm.

Particle-size control section - Clay content: 18 to 27 percent.
Rock fragments: 50 to 80 percent, mainly gravel. Lithology of fragments is dominantly quartzite.

A horizons
Value: 4 or 5 dry.
Chroma: 2 or 3, dry or moist.
Organic matter content: 1 or 2 percent.

Bt horizon
Value: 4 or 5 dry, 3 or 4 moist.
Chroma: 2 or 3, dry or moist.
Clay content: 18 to 27 percent.
Rock fragments: 50 to 80 percent, mainly as pebbles.
Organic matter content: 1 or 2 percent.
Reaction: Slightly alkaline or moderately alkaline.
Effervescence: Slightly effervescent or strongly effervescent.
Other features: Some pedons have subhorizons with dry value of 6, moist value of 4, and chroma of 4.
Calcium carbonate equivalent: 1 to 5 percent.

Bk horizons
Value: 6 through 8 dry, 5 through 7 moist.
Chroma: 1 through 3 dry, 2 through 4 moist.
Texture: Loam or Sandy loam.
Clay content: 12 to 20 percent.
Rock fragments: 60 to 85 percent, mainly as gravel.
Consistence: Slightly hard or very hard dry, very friable to firm moist, nonplastic or slightly plastic; some pedons may have discontinuous bands of extremely hard material.
Reaction: Moderately alkaline or strongly alkaline.
Carbonates: Distinct to prominent secondary calcium carbonate concretions around rock fragments or on the bottom of rock fragments.
Calcium carbonate equivalent: 15 to 20 percent.

COMPETING SERIES: These are the Becreek, Deecree, Denray, Eaglecone, Nirac, Pamison, Rudeen, Wereld, and Xine series.

Becreek soils have 7 to 15 percent clay in the particle size control section and are not moist for 10 to 20 days in the summer. Deecree soils average 31 to 40 percent calcium carbonate equivalent in the particle-size control section and have 15 to 30 percent rock fragments in the upper part. Denay soils have 10 to 15 percent clay in the particle-size control section and are not moist for 10 to 20 days in the summer. Eaglecone soils are dry from Aug 15 to Oct 15, have 20 to 39 percent calcium carbonate equivalent in the particle-size control section and rock fragments are dominated by basalt cobbles. Nirac soils are moderately deep to bedrock. Pamison soils have 8 to 15 percent clay in the particle size control section, and have secondary silica accumulation in the calcic horizon. Rudeen soils have a lithic contact at 50 to 100 cm. Wereld soils are 100 to 150 cm deep to a lithic contact and have 12 to 18 percent clay in the particle size control section. Xine soils have a paralithic contact at 50 to 100 cm and have 10 to 18 percent clay in the particle-size control section.

GEOGRAPHIC SETTING: Eenreed soils are on fan remnants. These soils formed in alluvium derived dominantly from quartzite with local admixtures of shale and limestone. Slopes are 4 to 50 percent. Elevations range from 1,920 to 2,380 m. The climate is dry-subhumid with cool moist winters and warm dry summers. The mean annual precipitation is 300 to 500 mm, mean annual temperature is 6 to 7 degrees C, and the frost-free period is 70 to 100 days.

GEOGRAPHICALLY ASSOCIATED SOILS: This is the Millan soil. Millan soils do not have calcic horizons.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; medium or high surface runoff; moderately high saturated hydraulic conductivity.

USE AND VEGETATION: Eenreed soils are used for livestock grazing, recreation, and wildlife habitat. The potential native vegetation is mainly black sagebrush, bluebunch wheatgrass, needleandthread, bluegrass, and scattered singleleaf pinyon. This site is correlated to Ecological Site R28AY034NV Shallow Calcareous Slope 10-14 P.Z.

DISTRIBUTION AND EXTENT: Eastern Nevada. These soils are not extensive. MLRA 28A.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona.

SERIES ESTABLISHED: White Pine County, Humboldt National Forest, Nevada, South Part, 2004. The name is coined.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 30 cm (A1, A2, and Bt horizons).
Argillic horizon - The zone from 13 to 30 cm (Bt horizon).
Calcic horizon - The zone from 13 to 152 cm (Bk1 and Bk2 horizons).
Particle-size control section - The zone from 13 to 30 cm (Bt horizon).

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National Cooperative Soil Survey
U.S.A.