LOCATION BOOTH OR+CAEstablished Series
TAXONOMIC CLASS: Fine, smectitic, frigid Vertic Palexerolls
TYPICAL PEDON: Booth very stony loam, range. (Colors are for moist soil unless otherwise noted.)
A--0 to 4 inches; very dark brown (10YR 2/2) very stony loam, dark gray (10YR 4/1) dry; weak thin platy structure; hard, friable, slightly sticky and slightly plastic; many roots; many very fine pores; 20 percent gravel and 20 percent cobbles and stones; slightly acid (pH 6.2); clear smooth boundary. (1 to 12 inches thick)
2Bt1--4 to 12 inches; very dark brown (10YR 2/2) clay, dark grayish brown (10YR 4/2) dry; moderate medium and coarse prismatic structure; very hard, very firm, very sticky and very plastic; common roots; few very fine tubular pores; nearly continuous stress cutans on peds; slightly acid (pH 6.4); clear smooth boundary. (6 to 12 inches thick)
2Bt2--12 to 24 inches; dark brown (10YR 3/3) clay, grayish brown (10YR 5/2) dry; dark brown (10YR 4/3) rubbed; strong coarse prismatic structure; very hard, very firm, very sticky and very plastic; few roots; few very fine tubular pores; continuous stress cutans on peds; neutral (pH 6.6); abrupt smooth boundary. (10 to 20 inches thick)
3Cr--24 to 26 inches; olive brown (2.5Y 4/4) weathered tuff, light gray (2.5Y 7/2) and olive yellow (2.5Y 6/6) dry; extremely firm.
3R--26 inches; unweathered tuff.
TYPE LOCATION: Lake County, Oregon; 2,000 feet east and 600 feet north of the southwest corner sec. 20, T. 36 S., R. 21 E., in Crooked Creek Valley.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 42 to 47 degrees F. The soils are usually moist and are dry in all parts between depths of 4 and 12 inches for 80 to 110 consecutive days in the four months after the summer solstice. The mollic epipedon is 7 to 15 inches thick and includes the upper part of the argillic horizon. Solum thickness and depth to a lithic contact is 20 to 40 inches. It is slightly acid or neutral. There is an absolute increase of clay of 20 percent or more between the A and 2Bt horizons.
The A horizon has hue of 10YR or 7.5YR, value of 2 or 3 moist, 3 through 5 dry, and chroma of 1 through 3 moist and dry. It has 5 to 20 percent gravel and 0 to 25 percent cobbles and/or stones.
The 2Bt horizon has hue of 7.5YR through 2.5Y, value of 2 through 4 moist, 3 through 6 dry, and chroma of 2 through 4 moist and dry. It is clay or silty clay with 45 to 60 percent clay and 0 to 10 percent rock fragments.
COMPETING SERIES: These are the Bridgecreek, Campcreek, Coser, Deer Creek, Goodington, Harkers, Lynnbow, Mohocken, Norcan, and Rands series. Bridgecreek soils have a mollic epipedon 15 to 20 inches thick and have a Bw developed in the loess cap above the 2Bt (argillic horizon). Campcreek, Deer Creek, Goodington, Harkers, Lynnbow, Norcan and Rands soils are over 40 inches deep. Coser soils have a paralithic contact at 20 to 40 inches. Mohocken soils have 20 to 35 percent rock fragments in the particle-size control section.
GEOGRAPHIC SETTING: Booth soils are on uplands at elevations of 4,000 to 6,500 feet. Slopes range from 0 to 60 percent. The soils formed in clayey material weathered from tuff. The climate is characterized by hot dry summers and cold wet winters. The mean annual precipitation is 12 to 18 inches. The mean July temperature is 60 to 65 degrees F, mean January temperature is about 25 to 28 degrees F, mean annual temperature is 40 to 45 degrees F. The frost-free period is 50 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Nuss and Royst soils. Nuss soils are loamy and are 10 to 20 inches deep to bedrock. Royst soils have a mollic epipedon over 20 inches thick and are clayey-skeletal.
DRAINAGE AND PERMEABILITY: Well drained; slow permeability.
USE AND VEGETATION: Used for livestock grazing, wildlife, and recreation. Native vegetation is low sagebrush, bluebunch wheatgrass, and Idaho fescue.
DISTRIBUTION AND EXTENT: South-central Oregon and northern California (MLRA 21). The series is extensive.
MLRA OFFICE RESPONSIBLE: Reno, Nevada
SERIES ESTABLISHED: Jackson County Area, Oregon (Klamath County part); 1988.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - from 0 to 12 inches (A and 2Bt1 horizons).
Argillic horizon - 4 to 24 inches (2Bt1 and 2Bt2 horizons).
Pale features - from the above laboratory data, the percent clay in the A horizon is 35 percent and in the 2Bt1 it is 57 percent with an abrupt boundary.
ADDITIONAL DATA: NSSL DATA; sample numbers 79P2288-2292, pedon number S79OR-037-001.