LOCATION LAKEVIEW OR+CAEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Cumulic Haploxerolls
TYPICAL PEDON: Lakeview loam, range. (Colors are for moist soil unless otherwise noted.)
A--0 to 4 inches; black (10YR 2/1) loam, dark gray (10YR 4/1) dry; weak very thin platy structure parting to moderate very fine granular; soft, friable, slightly sticky and slightly plastic; many very fine roots; many very fine pores; mildly alkaline (pH 7.4); clear smooth boundary. (4 to 8 inches thick)
Bt1--4 to 8 inches; black (N 2/0) silty clay loam, dark gray (N 4/0) dry; weak medium prismatic structure; very hard, firm, sticky and plastic; common very fine roots; few very fine tubular pores; few faint cutans on peds; neutral (pH 7.2); clear smooth boundary. (3 to 10 inches thick)
Bt2-8 to 14 inches; black (N 2/0) silty clay loam, dark gray (10YR 4/1) dry; weak coarse prismatic structure; hard, firm, sticky and plastic; common very fine roots; few very fine tubular pores; few faint cutans on peds; neutral (pH 7.2); gradual smooth boundary. (4 to 10 inches thick)
2Btb--14 to 20 inches; very dark brown (10YR 2/2) sandy clay loam, dark grayish brown (2.5Y 4/2) dry; weak medium prismatic and weak medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots; common very fine tubular pores; common faint cutans on peds; mildly alkaline (pH 7.4); clear smooth boundary. (0 to 10 inches thick)
2C1--20 to 32 inches; very dark grayish brown (2.5Y 3/2) sandy clay loam, grayish brown (2.5Y 5/2) dry; massive; slightly hard, friable, slightly sticky and slightly plastic; few roots; many very fine pores; mildly alkaline (pH 7.4); clear smooth boundary. (8 to 15 inches thick)
2C2--32 to 60 inches; dark grayish brown (2.5Y 4/2) sandy clay loam, light brownish gray (2.5Y 6/2) dry; massive; slightly hard, friable, slightly sticky and slightly plastic; few roots; many very fine pores; scattered white mycelial lime; mildly alkaline (pH 7.8).
TYPE LOCATION: Lake County, Oregon; 50 feet south of Highway 140 on the west bank of Muddy Creek; NW corner of the NE1/4 NE1/4 section 20, T. 39 S., R. 19 E.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 47 to 52 degrees F. Soils are usually moist but are dry in all parts between depths of 4 to 12 inches for 50 to 90 days in the summer. The solum and mollic epipedon range from 20 to 56 inches thick. The 10 to 40-inch control section averages 20 to 35 percent clay and more than 15 percent fine sand or coarser. The A and upper part of the B horizon are slightly acid to mildly alkaline. The lower part of the B horizon and the C horizon are neutral to mildly alkaline. Some pedons lack a B horizon.
The A horizon and upper part of the Bt horizon have value of 3 through 5 dry, 2 moist, and chroma of 0 through 2 dry and moist. The A horizon is loam, clay loam, or silty clay loam.
The 2B horizon has hue of neutral, 10YR or 2.5Y, value of 4 through 6 dry, 2 or 3 moist and chroma of 0 through 3 dry and moist. It is clay loam, loam or sandy clay loam.
The 2C horizon has hue of 2.5YR or 10YR, value of 2 to 4 moist, 3 to 6 dry and chroma of 2 or 3 moist and dry. It is sandy clay loam, silt loam, or loam. Some pedons have a few scattered mycelial lime veins below 30 inches.
COMPETING SERIES: These are the Birdow, Blackrock, Coit, Dagor, Eastcan, Goose Creek, Soquel, and Willowdale series. Birdow soils are calcareous throughout and are usually dry. Blackrock soils have 20 to 35 percent rock fragments in the 10 to 40-inch control section and have Bk horizons at depths of 23 to 46 inches. Coit soils are mottled and calcareous throughout the control section. Dagor soils are medium textured, well drained, noncalcareous throughout and lack a water table to depths of 60 inches. Eastcan soils are calcareous throughout and have mottles below depth of 25 to 40 inches. Goose Creek soils are mottled at depths of less than 35 inches. Monroe soils have a loam or fine sandy loam texture control section and are usually dry. Soquel soils have mean annual soil temperature of about 57 degrees F. Willowdale soils are usually dry, well drained and are calcareous at depths below 20 inches.
GEOGRAPHIC SETTING: Lakeview soils are on flood plains and alluvial fans at elevations of 4,050 to 5,500 feet. Slopes are 0 to 5 percent. The soils formed in alluvium weathered from tuff, andesite, rhyolite, and basalt and mixed with small amounts of ash. The climate is characterized by hot dry summers and cool wet winters. The mean annual precipitation is 8 to 18 inches. The mean January temperature is 27 to 29 degrees F., the mean July temperature is 65 to 69 degrees F., and the mean annual temperature is 45 to 50 degrees F. The frost-free period is 70 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Drews, Goose Lake, Malin, Ozmais, and Stockdrive soils. Drews soils are on terraces, are well drained and have an argillic horizon. Goose Lake soils are poorly drained and have an albic horizon that grades abruptly to a clayey Bt horizon. Malin soils are sodic and average 35 to 50 percent clay. Ozamis soils are poorly drained and have a mollic epipedon 10 to 15 inches thick. Stockdrive soils are sodic and have a natric horizon.
DRAINAGE AND PERMEABILITY: Moderately well drained and somewhat poorly drained; moderately slow permeability. The soils have rare or occasional flooding.
USE AND VEGETATION: Lakeview soils are used for irrigated pasture, small grains, and alfalfa, and wildlife habitat. Potential native vegetation is basin wildrye and basin big sagebrush. In areas with a more alkali surface, black greasewood and inland saltgrass are present.
DISTRIBUTION AND EXTENT: Lake basins in south-central Oregon and northern California; MLRA 21. The soils are moderately extensive.
MLRA OFFICE RESPONSIBLE: Reno, Nevada
SERIES ESTABLISHED: Modoc County (Alturas Area), California, 1974.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: The zone from 0 to 20 inches (A, Bt1, Bt2, 2Btb horizons)
Irregular decrease in organic matter with depth
In some pedons, the Bt horizon is absent and Bw and/or AC horizons are present.