LOCATION DODES OR+CAEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Aridic Argixerolls
TYPICAL PEDON: Dodes loam, cultivated. (Colors are for moist soil unless otherwise noted.)
Ap--0 to 7 inches; very dark brown (10YR 2/2) loam, grayish brown (10YR 5/2) dry; weak thin platy structure parting to moderate very fine granular; soft, very friable, slightly sticky and slightly plastic; common fine and very fine roots; many very fine pores; neutral (pH 6.6); abrupt smooth boundary. (5 to 10 inches thick)
A3--7 to 12 inches; very dark brown (10YR 2/2) loam, grayish brown (10YR 5/2) dry; weak medium subangular blocky and weak very fine granular structure; slightly hard, friable, slightly sticky and slightly plastic, common fine and very fine roots; many very fine tubular pores; neutral (pH 6.6); clear wavy boundary. (0 to 12 inches thick)
B21t--12 to 15 inches; very dark grayish brown (10YR 3/2) clay loam, dark brown (10YR 4/3) dry; brown (10YR 5/3) rubbed and dry; weak medium subangular blocky structure; hard, firm, sticky and plastic; common fine and very fine roots; many very fine tubular pores; few thin clay films on peds and many thin clay films in pores, thin clay bridges between sand grains; slightly acid (pH 6.5); clear wavy boundary. (0 to 12 inches thick)
B22t--15 to 22 inches; dark brown (10YR 3/3) clay loam, brown (10YR 5/3) dry; pale brown (10YR 6/3) rubbed and dry; weak medium subangular blocky structure; very hard, firm, very sticky and plastic; common fine and very fine roots; many very fine tubular pores; few thin clay films on peds and in pores, thin clay bridges between sand grains; slightly acid (pH 6.5); abrupt wavy boundary. (5 to 12 inches thick)
IICr--22 to 29 inches; black (N 2/) partially weathered sandy tuff interbedded with brown (10YR 5/3) diatomite.
TYPE LOCATION: Klamath County, Oregon; about 8 miles southeast of Klamath Falls; 750 feet east and 30 feet north of the SW corner of section 17, T.39S., R.10E.
RANGE IN CHARACTERISTICS: The mean annual soil temperature ranges from 48 degrees to 53 degrees F. The soils usually are dry and are dry at depths between 4 to 12 inches for about 100 to 120 consecutive days in the four-month period following the summer solstice. Depth to soft bedrock ranges from 20 to 40 inches. The mollic epipedon is 7 to 20 inches thick. Rock fragments in the Bt horizon range from 5 to 30 percent hard lava pebbles and 10 to 30 percent soft weathered tuffaceous diatomaceous pebbles. The solum is neutral or slightly acid.
The A horizon has value of 2 or 3 moist and 4 or 5 dry.
The B2t horizon has value of 4 through 6 dry and chroma of 2 or 3 moist and dry. It is clay loam or sandy clay loam and averages 25 to 35 percent clay and 35 to 50 percent fine sand and coarser.
COMPETING SERIES: These are the Bissell, Bjork, Cowiche, Frederickson, Galeppi, Harriman, Indiano, Margerum, Orr, Simcoe and Springmeyer series. Bissell, Cowiche, Galeppi, Harriman, Margerum, Orr and Springmeyer soils are deeper than 40 inches to bedrock. Also, Harriman soils have mollic epipedons 20 to 35 inches thick and Orr soils have 18 to 25 percent clay in the Bt horizon. Bjork, Indiano and Simcoe soils have a lithic contact at depths of 20 to 40 inches. Frederickson soils have Bt horizons that average more than 50 percent fine sand or coarser and are underlain by pumiceous tuff.
GEOGRAPHIC SETTING: The Dodes soils are on pediments and terraces at elevations of 4,100 to 4,500 feet. Slopes range from 0 to 15 percent. These soils formed in alluvium weathered from tuff, basalt, and diatomite. The climate is semiarid with warm dry summers and cool moist winters. Annual precipitation is 10 to 14 inches. Mean January temperature is 27 degrees to 29 degrees F. and the mean July temperature is 65 degrees to 69 degrees F. The average annual temperature is 46 degrees to 49 degrees F. The frost-free period is 90 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Capona, Fordney, Lorella and Modoc soils and the competing Harriman soils. Capona soils have cambic horizons with 18 to 27 percent clay. Fordney soils are sandy throughout and deeper than 60 inches to bedrock. Lorella soils have gravelly and very gravelly heavy clay loam and clay Bt horizons and have bedrock at depths of 10 to 20 inches. Modoc soils have duripans at depths of 20 to 40 inches.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; moderately slow permeability.
USE AND VEGETATION: These soils are used for irrigated barley, wheat, oats, alfalfa hay, annual hay crops, pasture, and range. The natural vegetation is dominantly western juniper, big sagebrush, antelope bitterbrush, rabbitbrush, bluebunch wheatgrass, Idaho fescue, and Sandberg bluegrass.
DISTRIBUTION AND EXTENT: Lake basins in south-central Oregon. These soils are inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Klamath County, Oregon, Southern Part, 1977.
REMARKS:
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.