LOCATION ZYMANS NV
Established Series
Rev. JBF/TM
05/2016
ZYMANS SERIES
The Zymans series consists of deep and very deep, well drained soils that formed in residuum and colluvium derived from volcanic rocks with additions of loess and ash. The Zymans soils are on mountains, hills, plateaus and rock pediments. Slopes are 2 to 50 percent. The mean annual precipitation is about 250 mm and the mean annual temperature is about 8 degrees C.
TAXONOMIC CLASS: Fine, smectitic, mesic Aridic Argixerolls
TYPICAL PEDON: Zymans very cobbly loam--rangeland. (Colors are for dry soil unless otherwise noted.)
A1--0 to 5 cm; grayish brown (10YR 5/2) very cobbly loam, very dark brown (10YR 2/2) moist; moderate medium platy structure; soft, very friable, slightly sticky and slightly plastic; many very fine roots; common very fine and fine vesicular and interstitial pores; 25 percent gravel, 20 percent cobbles, 2 percent stones; neutral (pH 6.8); abrupt smooth boundary. (3 to 10 cm thick)
A2--5 to 10 cm; dark grayish brown (10YR 4/2) very cobbly clay loam, very dark grayish brown (10YR 3/2) moist; moderate fine and medium subangular blocky structure parting to moderate very fine granular; slightly hard, friable, moderately sticky and moderately plastic; many very fine and common fine and medium roots; many very fine and common fine tubular pores; 25 percent gravel, 20 percent cobbles; neutral (pH 7.0); clear smooth boundary. (5 to 13 cm thick)
Bt1--10 to 15 cm; dark grayish brown (10YR 4/2) very cobbly clay, very dark brown (10YR 2/2) moist, few medium prominent relict black (N 2/) redox concentrations and stains; moderate fine subangular blocky structure parting to moderate very fine granular; hard, friable, very sticky and very plastic; many very fine and common fine to coarse roots; many very fine and fine tubular pores; common faint clay films lining pores and coating on faces of ped; 20 percent gravel, 15 percent cobbles; neutral (pH 7.0); clear smooth boundary. (5 to 25 cm thick)
Bt2--15 to 30 cm; brown (10YR 5/3) clay, dark brown (10YR 3/3) moist; common medium, prominent black (N 2/0) relict redox concentrations and stains; strong coarse prismatic structure parting to strong fine angular blocky; very hard, firm, very sticky and very plastic; common very fine and fine roots, mainly exped; common very fine and fine tubular pores; common prominent clay films lining pores and coating faces of peds; 10 percent gravel, 2 percent cobbles; neutral (pH 7.0); clear smooth boundary. (13 to 64 cm thick)
Bt3--30 to 94 cm; brown (10YR 5/3) clay, brown (10YR 4/3) moist, common medium, prominent black (N 2/0) redox concentrations in the upper part; strong coarse prismatic structure parting to strong angular blocky; very hard, firm, very sticky and very plastic; common very fine, fine and medium roots, mainly exped; common very fine tubular pores; many prominent clay films on faces of peds; many pressure faces; 5 percent gravel; neutral (pH 7.0); gradual smooth boundary. (13 to 90 cm thick)
Bt4--94 to 127 cm; pale brown (10YR 6/3) silty clay loam, dark yellowish brown (10YR 4/4) moist; moderate fine subangular blocky structure; hard, firm, moderately sticky and moderately plastic; few very fine and fine roots; common very fine and fine tubular pores; many prominent clay films on faces of peds; many pressure faces; 10 percent gravel; slightly alkaline (pH 7.8); abrupt wavy boundary. (0 to 46 cm thick)
Btk--127 to 142 cm; light brown (7.5YR 6/4) clay, strong brown (7.5YR 4/6) moist; moderate fine angular blocky structure; very hard, firm, very sticky and very plastic; few fine roots; few very fine and fine tubular pores; many prominent clay films on faces of peds; many pressure faces; many coarse seams and soft filaments of carbonate; violently effervescent; 5 percent gravel; moderately alkaline (pH 8.4); abrupt wavy boundary. (0 to 28 cm thick)
Cr--142 to 160 cm; weathered volcanic bedrock.
TYPE LOCATION: Humboldt County, Nevada; approximately four miles southwest of Jordan Meadow; about 500 feet south and 2000 feet east of the northwest corner of section 16, T. 45 N., R. 36 E.; USGS Jordan Meadows 7.5 minute topographic quadrangle; latitude 41 degrees 47 minutes 8 seconds N and longitude 117 degrees 56 minutes 18 seconds W; WGS84 Decimal Degrees 41.7855556 latitude, -119.6075000 longitude.
RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry, moist late October to mid June; aridic soil moisture regime bordering xeric.
Mean annual soil temperature: 8 to 11 degrees C.
Mollic epipedon: 25 to 48 cm thick, includes the upper Bt horizon.
Depth to base of Bt horizon: 100 to more than 150 cm.
Depth to weathered bedrock: 100 to more than 150 cm.
Other features: Clay increase is gradual with less than a 20 percent increase within 8 cm of the boundary between the A and Bt horizon or below subhorizons of the Bt.
Particle-size control section - Clay content: 45 to 60 percent, subhorizons in some pedons range from 35 to 60 percent.
Rock fragments: 5 to 20 percent.
A horizon
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 2 or 3.
Reaction: Neutral or slightly alkaline.
Bt horizon
Hue: 10YR or 7.5YR.
Value: 4 through 6 dry, 2 through 4 moist.
Chroma: 2 through 6. (Low value and chroma are in the upper part of the horizon)
Structure: Prismatic or blocky.
Consistence: Hard to very hard, dry.
Texture: The textures of the upper part of the Bt horizon are clay and silty clay, the lower part of the Bt horizon textures are silty clay loam, clay loam and clay with 0 to 15 percent rock fragments and averages 5 to 20 percent rock fragments;
Reaction: Neutral through moderately alkaline, increasing with depth.
Secondary carbonate accumulation: Segregated carbonate below 100 cm is in most pedons.
COMPETING SERIES: These are the
Brownscombe,
Bucklake,
Cagle,
Correco,
Holmzie,
Jasseek,
Northmore,
Perla,
Schoer,
Sherar, and
Wicup series.
Brownscombe,
Bucklake,
Cagle,
Holmzie,
Perla,
Sherar and
Wicup soils are moderately deep.
Correco soils have 35 to 45 percent clay in their argillic horizons, are slightly or medium acid, and are underlain by C horizons with loam or clay loam textures.
Jasseek soils have less than 45 percent clay and have a discontinuity at 100 to 150 cm.
Northmore soils have 35 to 45 percent clay in the argillic horizons textures are mainly sandy clay or sandy clay loam, and are underlain by sandy loam C horizons.
Schoer soils have a lithologic discontinuity of very gravelly coarse sand within 150 cm.
GEOGRAPHIC SETTING: Zymans soils are on mountains, hills, plateaus and rock pediments. These soils formed in residuum and colluvium from volcanic rocks with additions of loess and volcanic ash. Slopes are 2 to 50 percent. Elevations are 1,345 to 2,030 meters. The climate is cool, semiarid with hot, dry summers and cold, moist winters. The mean annual precipitation is 250 to 300 mm, mean annual temperature is 7 to 9 degrees C, and the frost-free season is 80 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Burrita and
Devada series. Burrita soils lack mollic epipedons and are shallow to hard bedrock. Devada soils are shallow to hard bedrock.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; medium to rapid runoff; moderately low saturated hydraulic conductivity.
USE AND VEGETATION: Rangeland and wildlife habitat. The present vegetation is mainly big sagebrush, bluebunch wheatgrass, Thurber needlegrass and basin wildrye.
DISTRIBUTION AND EXTENT: North-central Nevada. These soils are not extensive. MLRA 23, 24.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Humboldt County, Nevada, East Part, 1993.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the surface to 30 cm (A1, A2, Bt1 and Bt2 horizons).
Argillic horizon - The zone from 10 to 142 cm (Bt1, Bt2, Bt3, Bt4 and Btk horizons).
Aridic feature - Aridic soil moisture regime bordering on xeric.
Particle-size control section - The zone from 10 to 60 cm (Bt1, Bt2 and Bt3).
National Cooperative Soil Survey
U.S.A.