LOCATION YAINAX OREstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Mollic Haploxeralfs
TYPICAL PEDON: Yainax loam, woodland. (Colors are for moist soil unless otherwise noted.)
01--1 inch to 0; loose mat of pine needles, partly decomposed in lower part.
A1--0 to 5 inches; very dark grayish brown (10YR 3/2) loam, light brownish gray (10YR 6/2) dry; weak thin platy structure parting to weak very fine granular; soft, very friable, slightly sticky and slightly plastic; many very fine roots; many very fine pores; about 25 percent ash; slightly acid (pH 6.4); abrupt wavy boundary. (4 to 8 inches thick)
A2--5 to 14 inches; dark grayish brown (10YR 4/2) loam, light gray (10YR 7/2) with few fine brown flecks dry; weak medium and fine angular blocky structure; slightly hard, friable, sticky and slightly plastic; many roots; many very fine tubular pores; about 10 percent ash; nearly continuous bleached silt coatings on peds; slightly acid (pH 6.4); clear wavy boundary. (0 to 12 inches thick)
A&B--14 to 24 inches; dark brown (10YR 4/3) clay loam, light gray (10YR 7/2) with many flecks and patches of light yellowish brown (10YR 6/4) dry; moderate medium and fine angular blocky structure; hard, firm, sticky and plastic; many roots; many very fine tubular pores; many bleached silt coatings on surfaces of peds; few thin clay films on peds; slightly acid (pH 6.4); clear wavy boundary. (0 to 12 inches thick)
B&A--24 to 31 inches; dark brown (10YR 4/3) and brown (10YR 5/3) clay loam, yellowish brown (10YR 5/4) dry with thick tongues and coatings of light gray (10YR 7/2) dry; strong medium and fine angular blocky structure; very hard, firm, sticky and plastic; many roots to depths of 27 inches, common roots below; many very fine tubular pores; many moderately thick clay films on peds, thin clay films in pores; many soft pebbles of diatomite, about 10 percent hard lava pebbles and cobbles; slightly acid (pH 6.4); clear wavy boundary. (6 to 15 inches thick)
Cr--31 to 37 inches; very pale brown (10YR 7/3) and yellowish brown (10YR 5/4) diatomite breccia, white (N 8/ ) and very pale brown (10YR 7/3) dry; breccia consists mainly of subangular diatomite fragments.
TYPE LOCATION: Klamath County, Oregon; about 2 miles southwest of Council Butte; 2,100 feet west and 1,350 feet south of the northeast corner section 35, T. 36 S., R. 11 E.
RANGE IN CHARACTERISTICS: Mean annual soil temperature ranges from 44 to 47 degrees F. The soils are usually moist and are dry 65 to 90 days in summer. Depth to soft bedrock ranges from 20 to 40 inches. The solum is slightly acid or neutral. Hard lava rock fragments average 5 to 35 percent in the argillic horizon.
The A1 horizon has value of 5 or 6 dry and 2 or 3 moist. Where value is 5 dry the horizon thickness is less than 4 inches. The A horizon has about 5 to 20 percent pebbles.
The Bt horizon has value of 4 or 5 moist, 5 through 7, and chroma of 2 through 4 dry. Values of 6 or 7 mainly are bleached silt coatings on faces of peds and interiors. This horizon averages 27 to 35 percent clay and more than 15 percent fine sand and coarser. It has 0 to 30 percent pebbles and 0 to 5 percent cobbles of unweathered hard lava.
COMPETING SERIES: These are the Bancas, Blakeport, Bull Trail, Bullnell, Delleker, Duzel, Hilt, Kilfoil, Mary, Morical, Neuske and Steinbeck series. Bancas, Blakeport, Bull Trail, Duzell, Hilt, Mary, Morical and Steinbeck soils have a soil temperature warmer than 47 degrees F. Bullnell soils have hue of 10YR, 5YR or 2.5YR in the B2t horizon and are mildly to strongly alkaline and moderately or strongly calcareous in the lower part. Delleker soils lack moist value darker than 3.5 in the upper 4 inches and are deeper than 40 inches to bedrock. Kilfoil soils have weakly to strongly calcareous and mildly to strongly alkaline B2t horizons. Neuske soils have bisequum profiles and are deeper than 40 inches to bedrock.
GEOGRAPHIC SETTING: Yainax soils are on pediments and dissected rock benches at elevations of 4,300 to 4,700 feet. Slopes are 1 to 15 percent. The soils formed in material weathered mainly from diatomite. The climate is subhumid with dry summers and cold winters with much snow. The mean annual precipitation is 15 to 18 inches. The mean January temperature is 27 degrees F., the mean July temperature is 62 degrees F., and the mean annual temperature is 43 to 45 degrees F. The frost-free period is 50 to 70 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Fuego, Merlin, Woodcock and Yancy soils. Fuego soils are skeletal, have mollic epipedons and have sandy loam texture throughout. Merlin soils have hard bedrock at depths of 10 to 20 inches, mollic epipedons and clayey argillic horizons. Woodcock soils have thick mollic epipedons, are skeletal and commonly are more than over 60 inches deep to bedrock.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderately slow permeability.
USE AND VEGETATION: The soils are used for timber, irrigated hay and pasture, homesites and wildlife habitat. Vegetation on noncultivated areas mainly is ponderosa pine, bitterbrush, sedge and bottlebrush squirreltail.
DISTRIBUTION AND EXTENT: Colder basins in south-central Oregon. The soils are moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Klamath County, Oregon, 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.