LOCATION ZANBUR CAEstablished Series
TAXONOMIC CLASS: Sandy over loamy, mixed, superactive, mesic Entic Haploxerolls
TYPICAL PEDON: Zanbur sandy loam - on a 1 percent slope under barley stubble at 4040 feet elevation. (When described on September 9, 1985, the soil was dry throughout. Colors are for dry soil unless otherwise noted.)
Ap--0 to 10 inches; grayish brown (10YR 5/2) sandy loam, very dark grayish brown (10YR 3/2) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine roots; common very fine interstitial and tubular pores; slightly effervescent with disseminated lime; moderately alkaline (pH 8.0); clear smooth boundary. (10 to 14 inches thick)
AC--10 to 13 inches; light brownish gray (10YR 6/2) loamy fine sand, very dark grayish brown (10YR 3/2) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots; common very fine interstitial, few very fine tubular pores; slightly effervescent with disseminated lime; moderately alkaline (pH 8.0); abrupt smooth boundary. (0 to 4 inches thick)
C--13 to 20 inches; light brownish gray and light gray (10YR 6/2, 7/2) loamy sand, very dark grayish brown (10YR 3/2) moist; massive; loose; nonsticky and nonplastic; many very fine ant fine roots; many very fine interstitial and tubular pores; slightly effervescent with disseminated lime; moderately alkaline (pH 8.0); abrupt wavy boundary. (6 to 20 inches thick)
2C1--20 to 30 inches; white (2.5Y 8/2) silt loam, light yellowish brown (2.5Y 6/4) moist; weak fine platy structure; slightly hard, friable, slightly sticky and plastic; few very fine roots; few very fine interstitial and tubular pores; slightly effervescent with disseminated lime; moderately alkaline (pH 8.0); clear wavy boundary. (8 to 12 inches thick)
2C2--30 to 60 inches; white (2.5Y 8/2) silt loam, light yellowish brown (2.5Y 6/4) moist; moderate fine platy structure; hard, firm, slightly sticky and plastic; few very fine roots; common very fine tubular pores; slightly effervescent with disseminated lime; moderately alkaline (pH 8.0); clear wavy boundary.
TYPE LOCATION: Modoc County, California; about 6 miles east of the town of Tulelake, CA, about 1 700 feet west and 775 feet north of the southeast corner of section 27, T. 48 N., R. 5 E.
RANGE IN CHARACTERISTICS: Depth of lacustrine sediments is 60 inches or more. The mean annual soil temperature ranges from 48 to 52 degrees F. The soil temperature at a depth of 20 inches is above 41 degrees F from about March 15 to December 1 (255 days) and is above 47 degrees F from about April 15 to November 15 (210 days). The soil between depths of 10 to 24 inches is dry in all parts from about July 1 to November 1 (l20 days). The soil moisture control section is dry less than half the time the soil temperature is about 41 degrees F. Reaction is mildly or moderately alkaline.
The A horizon has try color of 10YR 4/2, 5/2 or 5/3 and moist color of 10YR 3/1, 3/2 or 3/3. Texture is sandy loam with 10 to 18 percent clay. Gravel range from 0 to 15 percent.
The C horizon has dry color of 10YR 6/1, 6/2, 6/3 or 7/2 and moist color of 10YR 3/2, 4/2, 4/3 or 4/4. Texture is loamy fine sand or loamy sand with 0 to 10 percent clay. Gravel range from 0 to 15 percent.
The IIC horizon has dry color of 10YR 6/2, 6/3, 7/2, 7/3, 8/2, 8/3; 2.5Y 7/2, 7/4, 8/2 or 8/4 and moist color of 10YR 5/2, 5/3, 6/2, 6/3; 2.5Y 5/2, 5/4, 6/2 or 6/4. Texture is silt loam with 10 to 18 percent clay. Electrical conductivity ranges from 2 to 8.
COMPETING SERIES: These are the Francis, La Fosta and Wasatch in other families. These soils lack a contrasting particle size control section.
GEOGRAPHIC SETTING: Zanbur soils are on basin terraces. Slopes are 0 to 2 percent. The soils formed in alluvium from volcanic ash and weathered tuff that is deposited over lacustrine sediments. Elevations are 4035 to 4045 feet. The climate is semi-arid with warm dry summers and cool moist winters. The average annual precipitation is about 12 to 16 inches. Snowfall is 20 to 30 inches. Mean January temperature is about 30 degrees F; mean July temperature is about 65 degrees F; mean annual temperature is about 48 degrees F. Frost-free Season is about 60 to 80 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Laki, Osborn, Poe and Zuman soils. Laki, Osborn and Zuman soils lack a contracting particle size control section. Poe soils have a duripan at depths of 20 to 40 inches .
DRAINAGE AND PERMEABILITY: Moderately well drained, slow runoff, rapid over moderate permeability. A water table occurs at depths of 42 to 60 inches from March to September unless artificially drained.
USE AND VEGETATION: Zanbur soils are used as cropland. Crop commonly grown are wheat, barley, oats and alfalfa.
DISTRIBUTION AND EXTENT: Northcentral California. These soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Siskiyou County, California, 1986.
REMARKS: Diagnostic horizons and features recognized in the pedon are:
Mollic epipedon--the zone from the surface of the soil to a depth of 10 inches. (Ap)
Lacks cambic horizon - the AC and C horizons have textures coarser than loamy very fine sand. The 2C horizons lack stronger chroma, redder hue or higher clay content than the underlying horizon. Structure is present in the 2C horizon, however, fine stratification (1/4 5mm) in unconsolidated lacustrine sediments is considered as rock structure.
Texture control: sandy over loamy family: The particle control section (10 to 40 inches) the weighted average of the upper part of the control section is loamy sand and has 5 percent clay. The lower part of the control section is silt loam and has 15 percent clay.
Moderately well drained - Has a water table at depths of 42 to 60 inches unless artificially drained. Water table within 72 inches during winter month will effect septic tank interpretation and could decrease the longevity of deep rooted crops.
OSED scanned by SSQA. Last revised by state on 4/86.
The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Reno MLRA office, without review of the soil series property data. The remainder of this document has not been updated.