LOCATION LEHMANDOW               NV

Established Series
Rev. JBF/BKP
02/2012

LEHMANDOW SERIES

The Lehmandow series consists of very deep, poorly drained soils that formed in alluvium over till derived mainly from quartzite, with minor amounts of limestone and granite. Lehmandow soils occur in seep areas and on stream terraces. Slopes are 0 to 8 percent. The mean annual precipitation is about 450 mm and the mean annual temperature is about 5 degrees C.

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Typic Endoaquolls

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

A1--0 to 10 cm; dark gray (10YR 4/1) loam, very dark brown (10YR 2/2) moist; strong very fine subangular blocky structure parting to strong fine granular; slightly hard, friable, nonsticky and nonplastic; many very fine, and few fine roots; many very fine and common fine tubular and interstitial pores; slightly alkaline (pH 7.4); clear smooth boundary. (5 to 20 cm thick)

A2--10 to 25 cm; very dark grayish brown (10YR 3/2) clay loam, very dark brown (10YR 2/2) moist; strong coarse subangular blocky structure parting to strong fine subangular blocky; very hard, very firm, moderately sticky and moderately plastic; common very fine, and many fine and medium roots; few very fine, fine and medium tubular and interstitial pores; 5 percent gravel and 5 percent cobbles; neutral (pH 6.9); clear smooth boundary. (10 to 20 cm thick)

Bwg1--25 to 61 cm; gray (10YR 6/1) very stony clay loam, dark gray (10YR 4/1) moist; strong coarse subangular blocky structure parting to strong medium subangular blocky; very hard, very firm, moderately sticky and moderately plastic; few very fine, common fine and medium roots; common very fine and fine, and few medium interstitial pores; common (10 percent) distinct fine irregular, light brown (7.5YR 6/4) masses of iron accumulation; 10 percent gravel, 15 percent cobbles, and 20 percent stones; slightly alkaline (pH 7.4); clear smooth boundary. (25 to 40 cm thick)

Bwg2--61 to 114 cm; light gray (10YR 7/2) very stony clay loam, grayish brown (10YR 5/2) moist; strong coarse subangular blocky structure parting to strong medium subangular blocky; hard, firm, slightly sticky and slightly plastic; few very fine, common fine and medium roots; common very fine and fine, and few medium interstitial pores; many (25 percent) distinct medium irregular, light brown (7.5YR 6/4) masses of iron accumulation; 15 percent gravel, 10 percent cobbles, and 25 percent stones; slightly alkaline (pH 7.5); clear smooth boundary. (50 to 60 cm thick)

Cg--114 to 152 cm; white (10YR 8/1) very stony clay loam, gray (10YR 6/1) moist; massive; hard, firm, moderately sticky and slightly plastic; few very fine, fine, and medium roots; common very fine and fine, and few medium interstitial pores; many (20 percent) distinct large irregular, light brown (7.5YR 6/4) masses of iron accumulation; 5 percent gravel, 10 percent cobbles, and 30 percent stones; slightly alkaline (pH 7.7); clear smooth boundary.

TYPE LOCATION: White Pine County, Nevada; in Great Basin National Park in Strawberry Creek drainage about 300 feet west of Blue Canyon; USGS Windy Peak 7.5 minute topographic quadrangle; latitude 39 degrees 3 minutes 20 seconds N and longitude 114 degrees 18 minutes 21 seconds W; UTM Zone 11, 733129e, 4326402n, NAD 83.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually moist throughout the year below 100 cm; ground water has an upper boundary between 15 to 30 cm between March and May during normal years; aquic soil moisture regime.
Mean annual soil temperature: 5.5 to 7 degrees C
Mollic epipedon thickness: 25 to 60 cm
Reaction: Neutral to slightly alkaline.
Particle-size control section: Clay content: Averages 20 to 35 percent.
Rock fragments: Averages 35 to 60 percent, mainly cobbles and stones. Lithology of fragments is mainly quartzite.

A1 horizon
Value: 3 through 5 dry, 2 or 3 moist.
Chroma: 1 or 2, dry or moist.
Organic matter content: 2 to 4 percent.

A2 horizon
Value: 3 through 5 dry, 2 or 3 moist.
Chroma: 1 or 2, dry or moist.
Clay content: 27 to 35 percent.
Rock fragments: O to 15 percent.
Organic matter content: 2 to 4 percent.

Bwg horizons
Value: 6 through 8 dry, 4 through 6 moist.
Chroma: 1 or 2, dry or moist.
Texture: Loam or clay loam.
Clay content: 20 to 35 percent.
Rock fragments: 35 to 65 percent, dominantly cobbles and stones.
Soil structure: Coarse or medium subangular blocky structure.
Redoximorphic features: Redoximorphic concentrations occur as common or many masses of iron accumulation.

Cg horizon - Value: 6 through 8 dry, 4 through 6 moist.
Chroma: 1 or 2, dry or moist.
Texture: Loam or clay loam.
Clay content: 20 to 35 percent.
Rock fragments: 35 to 65 percent, dominantly cobbles and stones.
Redoximorphic features: Redoximorphic concentrations occur as common or many masses of iron accumulation.

COMPETING SERIES: These are the Allwit, Irim, Pronto, and Swampcreek series.

Allwit soils have less than 20 percent clay in the particle-size control section. Irim soils have uniformly calcareous material ranges from 100 to more than 150 cm and have hues of 5YR through 7.5YR in the A and Bw horizons. Pronto soils have a seasonal high water table at 30 to 60 cm. Swampcreek soils have secondary carbonates at a depth of 50 to 100 cm.

GEOGRAPHIC SETTING: Lehmandow soils occur in seep areas and on stream terraces. They formed in alluvium over till derived mainly from quartzite, with minor amounts of limestone and granite. Slopes are 0 to 8 percent. Elevations range from 2,130 to 2,950 meters. The climate is dry-subhumid with cool moist winters and warm dry summers. The mean annual precipitation is 400 to 500 mm, mean annual temperature is 4 to 6 degrees C, and the frost-free period is 40 to 60 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Brokit, Glideski, Jumble, and Lemcave series. Brokit soils have a strongly contrasting particle-size control section with 12 to 20 percent clay in the upper part and 3 to 10 percent clay in the lower part. Glideski soils have argillic horizons and are well drained, and occur on higher stream terraces. Jumble soils are have ochric epipedons, cambic horizons, horizons with thin lamellae, and occur on adjacent moraines. Lemcave soils are sandy-skeletal, have ochric epipedons, and occur on adjacent moraines.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Poorly drained; low surface runoff; low saturated hydraulic conductivity. Endosaturation is present with an apparent seasonal high water table between 15 to 30 cm (very shallow free water occurrence class) between March and May. Cumulative annual duration class is common. These soils are susceptible to occasional flooding for brief periods between March and September.

USE AND VEGETATION: Lehmandow soils are used for livestock grazing, recreation, and wildlife habitat. The potential native vegetation is mainly tufted hairgrass, sedges, and Nevada bluegrass. This site is correlated to Ecological Site R28AY072NV Wet Meadow.

DISTRIBUTION AND EXTENT: Eastern Nevada. These soils are not extensive. The main acreage occurs in MLRA 28A with additional acreage occurring in MLRA 28B and 29.

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

SERIES ESTABLISHED: White Pine County, Great Basin National Park, Nevada, 2009. The name is coined.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 25 cm (A1 and A2 horizons).
Cambic horizon - The zone from 25 to 114 cm (Bwg1 and Bwg2 horizons).
Endosaturation feature - The condition of ground water with an upper boundary of 25 cm at certain times during normal years (Bg1 horizon).
Particle-size control section - The zone from 25 to 100 cm (Bwg1 and upper part of the Bwg2 horizons).

ADDITIONAL DATA: NASIS user Pedon ID: 07NV778029-CWL
Previous authors and editors include: CWL/PWB/TM.

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National Cooperative Soil Survey
U.S.A.