LOCATION GLEAN CA+NVEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Pachic Haploxerolls
TYPICAL PEDON: Glean extremely stony sandy loam, rangeland on a 50 percent North facing slope under big sagebrush and perennial grasses at 5600 feet elevation. (Colors are for dry soil unless otherwise noted.)
A1--0 to 3 inches; dark grayish brown (10YR 4/2) extremely stony sandy loam, very dark grayish brown (10YR 3/2) moist; moderate fine and medium granular structure; soft, very friable, nonsticky and nonplastic; many very fine and common medium and coarse roots; many very fine interstitial pores; slightly acid (pH 6.4); clear wavy boundary. (1 to 14 inches thick)
A2--3 to 6 inches; dark grayish brown (10YR 4/2) extremely stony sandy loam, very dark grayish brown (10YR 3/2) moist; moderate fine and medium granular structure; soft, very friable, nonsticky and nonplastic; many very fine and common medium and coarse roots; many very fine interstitial pores; slightly acid (pH 6.4); clear wavy boundary. (2 to 7 inches thick)
A3--6 to 17 inches; dark grayish brown (10YR 4/2) very gravelly sandy loam, very dark grayish brown (10YR 3/2) moist; weak medium and coarse granular structure; slightly hard, friable, nonsticky and nonplastic; common very fine, medium, and coarse roots; many very fine interstitial pores; slightly acid (pH 6.5); clear wavy boundary. (0 to 14 inches thick)
AC--17 to 29 inches; grayish brown (10YR 5/2) very gravelly sandy loam, dark brown (10YR 3/3) moist; weak medium and coarse granular structure; slightly hard, friable, nonsticky and nonplastic; common fine, medium and coarse roots; common very fine tubular and interstitial pores; very few thin colloid stains on sand grains; slightly acid (pH 6.5); gradual wavy boundary. (7 to 15 inches thick)
C1--29 to 39 inches; grayish brown (2.5Y 5/2) very gravelly sandy loam, olive brown (2.5Y 4/4) moist; massive parting to weak very coarse granular structure; slightly hard, friable, slightly sticky and nonplastic; common very fine and fine and few medium and coarse roots; common very fine tubular and interstitial pores; very few thin colloid stains on sand grains; slightly acid (pH 6.5); gradual wavy boundary. (5 to 23 inches thick)
C2--39 to 51 inches; grayish brown (2.5Y 5/2) very cobbly sandy loam, olive brown (2.5Y 4/4) moist; massive; slightly hard, friable, nonsticky and nonplastic; common very fine and fine and few medium and coarse vertical roots; few fine tubular and interstitial pores; slightly acid (pH 6.5). (0 to 25 inches thick)
2R--51 to 54 inches; andesite with some fractures.
TYPE LOCATION: Lassen County, California; about 4.5 mile southwest of Hallelujah Junction; 1,320 feet south nd 600 feet west of center of section 29, T.22 N., R.17 E. MDEM.
RANGE IN CHARACTERISTICS: Depth to a lithic contact of basalt, rhyolite or andesite is 40 to 70 inches. The mean annual soil temperature is about 43 to 47 degrees F. The soil temperature is above 41 degrees F., from April 1 to November 1 and above 47 degrees F., from about April 15 to November 1. The soil is moist from the 1st of November until the 15th of July. Rock fragments increase with increasing soil depth. The soil between depths of 10 and 40 inches averages 40 to 70 percent by volume of gravel, cobblestones, and stones. It ranges from sandy loam to loam modified by gravel, cobblestones, stones, and boulders. It averages 8 to 18 percent clay. The soil is slightly acid to mildly alkaline and increases with increasing soil depth.
The A horizon is grayish brown, very dark grayish brown, brown, dark grayish brown or dark brown. Value is 3 or 4 dry 2 or 3 moist and chroma of 1 or 2. It has granular or subangular blocky structure. Organic matter content ranges from 1 to 3 percent and decreases regularly with depth to less than 1 percent 22 to 39 inches below the surface.
The C horizon is light brownish gray, pale brown, light yellowish brown, grayish brown, brown, yellowish brown or light olive brown in hue of 10YR, 7.5YR or 2.5Y, Value of 4 or 5 dry, 2 or 3 moist and chroma of 1 or 2.
COMPETING SERIES: These are the Baldridge, Burgi, Chambean, Climine (T), Fredonyer (T), Ginser, Lambring (T), Rondowa (T), Sinker, St. Anthony (T), Webfoot and Westbutte (T) series. Baldridge and Chambeam soils are dry 45 to 60 days. Burgi, Climine and St. Anthony soils have 18 to 27 percent clay in the control section. Fredonyer, Sinker and Westbutte soils are moderately deep to hard bedrock. Lambring soils (see Remarks). Rondowa soils are dry less than 90 days. Webfoot soils are saturated at a depth of 1.0 to 2.0 feet form march through June.
GEOGRAPHIC SETTING: The Glean soils are on moderately sloping to very steep colluvial mountain slopes at elevations of 4,500 to 8,200 feet. They formed in gravelly, cobbly, and stony colluvium from mixed rocks including metamorphic rocks, basalt, and andesite. The climate is cool, semiarid with warm, dry summers and cold, moist winters. Mean annual precipitation is 10 to 16 inches. Average January temperature is about 27 degrees F., and average July temperature is 62 degrees F. The mean annual air temperature is 41 to 45 degrees F. The frost-free season is 30 to 45 days and up to 80 days in Nevada.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Aldax, Millich, and Trosi soils. Aldax and Millich soils have a lithic contact at depths of less than 20 inches. Trosi soils lack a mollic epipedon and have a duripan.
DRAINAGE AND PERMEABILITY: Well-drained; medium to very rapid runoff; moderately rapid permeability.
USE AND VEGETATION: Used for rangeland. The vegetation is big sagebrush, bitterbrush, scattered Jeffrey pine, cheatgrass, squirreltail, Nevada bluegrass, Idaho fescue, and Great Basin wildrye.
DISTRIBUTION AND EXTENT: Northeastern California and northern Nevada. The soils of this series are extensive.
MLRA OFFICE RESPONSIBLE: Reno, Nevada
SERIES ESTABLISHED: Lassen County, California, 1973.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Pachic horizon - The zone from the soil surface to about 29 inches (A1, A2, A3 and AC horizons).
Particle-size control section - The zone from 10 to 40 inches (the AC and C1 horizons and portions of the A3 and C2 horizons).
The tentative Lambring Series (3/81) is not adequately separated from the Established Glean Series (1973).