LOCATION KUBLI OREstablished Series
TAXONOMIC CLASS: Fine-loamy over clayey, mixed, superactive, mesic Aquic Haploxerolls
TYPICAL PEDON: Kubli loam, cultivated. (Colors are for moist conditions unless otherwise noted.)
Ap--0 to 9 inches; very dark brown (10YR 2/2) loam, grayish brown (10YR 5/2) dry; massive; slightly hard, friable, slightly sticky and slightly plastic; many fine roots; neutral (pH 6.8); abrupt smooth boundary. (6 to 9 inches thick)
A--9 to 15 inches; very dark grayish brown (10YR 3/2) loam, grayish brown (10YR 5/2) dry; common fine faint dark brown (7.5YR 4/4) mottles; weak medium and coarse subangular blocky structure; hard, friable, slightly sticky and slightly plastic; few roots; many very fine tubular pores; light brownish gray (10YR 6/2) coatings dry; neutral (pH 6.8); clear smooth boundary. (4 to 8 inches thick)
Bw1--15 to 25 inches; dark grayish brown (10YR 4/2) loam, brown (10YR 5/3) dry; common medium faint dark brown (7.5YR 4/4) and dark grayish brown (2.5Y 4/2) mottles; weak medium and coarse subangular blocky structure; hard, friable, slightly sticky and slightly plastic; few roots; many very fine tubular pores; neutral (pH 6.8); gradual smooth boundary. (8 to 12 inches thick)
Bw2--25 to 31 inches; dark grayish brown (10YR 4/2) loam, brown (10YR 5/3) dry; common medium and large distinct reddish brown (5YR 4/4) mottles; weak medium and coarse subangular blocky structure; very hard, friable, slightly sticky and slightly plastic; few roots; many very fine tubular pores; neutral (pH 6.8); abrupt smooth boundary. (4 to 8 inches thick)
2C1--31 to 47 inches; brown (10YR 4/3) clay, brown (10YR 5/3) and light brownish gray (2.5Y 6/2) dry; massive; extremely hard, very firm, slightly sticky and slightly plastic; common very fine tubular pores; neutral (pH 6.6); clear smooth boundary. (10 to 20 inches thick)
2C2--47 to 60 inches; brown (10YR 4/3) with very dark grayish brown (2.5Y 3/2) coatings, clay loam, light brownish gray (2.5Y and 10YR 6/2) and pale brown (10YR 6/3) dry; massive; hard, firm, slightly sticky and slightly plastic; neutral (pH 6.8).
TYPE LOCATION: Jackson County, Oregon; about one mile southwest of Central Point; about 1,200 feet south and 400 feet east of the northwest corner of sec. 15, T 37 S., R. 2 W.
RANGE IN CHARACTERISTICS: The soils are usually moist but dry throughout between 4 to 12 inches for 70 to 100 consecutive days in most years. The mean annual soil temperature is 52 to 56 degrees F. Depth to the 2C horizon is 25 to 35 inches. Depth to bedrock is 60 inches or more. Coarse sand makes up a large porportion of the sand fraction. The particle-size control section has 0 to 15 percent gravel.
The A horizon has hue of 10YR, value of 2 or 3 moist and 5 dry, chroma of 1 or 2 moist and 2 or 3 dry. Faint mottles are common in the lower part.
The B horizon has hue of 10YR or 2.5Y, value of 3 through 5 moist and 4 through 6 dry, chroma of 2 or 3 dry. It is loam with 18 to 25 percent clay.
The 2C horizon has hue of 10YR or 2.5Y, value of 4 or 5 moist, 5 or 6 dry, chroma of 2 or 3 moist and dry. It is clay loam or clay and averages 35 to 50 percent clay.
COMPETING SERIES: There are no competing series in this family.
GEOGRAPHIC SETTING: The Kubli soils are on stream terraces at elevations of 1,000 to 2,300 feet. Slopes are 0 to 7 percent. The soils formed in alluvium from granitic materials deposited over clayey alluvium. The mean annual precipitation is 18 to 30 inches. The mean annual temperature is 50 to 54 degrees F. The frost-free period is 150 to 180 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Barron, Central Points, Cove, Medford and Shefflein soils. All of these soils lack contrasting textures. The Barron and Central Points soils are somewhat excessively drained and lack mottles and clayey textures. Medford soils have silty clay loam in the B horizons and lack mottles with chromas of 2 above 30 inches. Cove soils are fine textured throughout, mottled and chroma of 2 or less throughout the sola. Shefflein soils are fine-loamy.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Runoff is slow. Permeability is moderate in B horizon and very slow in the 2C horizons.
USE AND VEGETATION: The soils are used for dryland and irrigated pasture, hay, grass seed, and orchards. Vegetation is common snowberry, Idaho fescue, Oregon white oak, ponderosa pine, Pacific madrone and poison oak.
DISTRIBUTION AND EXTENT: Southwestern Oregon. The soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Jackson County Area, Oregon, 1988.
REMARKS: The activity class was added to the classification in March of 2003. Competing series were not checked at that time. - ET