LOCATION REDOLA UT+CAEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Cumulic Haploxerolls
TYPICAL PEDON: Redola loam--cultivated. (Colors are for air-dry soils unless otherwise stated.)
Ap--0 to 8 inches; grayish brown (10YR 5/2) loam, very dark grayish brown (10YR 3/2) moist; the upper 1 or 2 inches of this horizon has a weak thin platy structure, below this the structure is weak medium subangular blocky; hard, friable, slightly sticky and slightly plastic; few medium, fine and very fine roots; few medium, fine and very fine discontinuous pores; strongly calcareous; carbonates are disseminated; moderately alkaline (pH 7.9); clear smooth boundary. (6 to 8 inches thick)
A--8 to 20 inches; grayish brown (10YR 5/2) loam, very dark grayish brown (10YR 3/2) moist; weak fine subangular blocky structure; hard, friable, slightly sticky and slightly plastic; few medium, fine and very fine roots; few fine and common very fine pores; moderately calcareous; carbonates are disseminated; mildly alkaline (pH 7.8); gradual smooth boundary. (9 to 20 inches thick)
C1--20 to 30 inches; grayish brown (10YR 5/2) loam, very dark
grayish brown (10YR 3/2) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few medium fine and very fine roots; few fine and common very fine discontinuous pores; moderately calcareous; moderately alkaline (pH 7.9); gradual wavy boundary. (4 to 18 inches thick)
C2--30 to 50 inches; grayish brown (10YR 5/2) very fine sandy loam, stratified with thin lenses of coarse sand and gravelly coarse sand; very dark grayish brown (10YR 3/2) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few fine and very fine roots; few fine and common very fine pores; moderately calcareous; carbonates are disseminated; mildly alkaline (pH 7.8); clear smooth boundary. (0 to 20 inches thick)
2C--50 to 60 inches; light brownish gray (10YR 6/2) gravelly coarse sand; dark grayish brown (10YR 4/2) moist; single grain ; loose; few fine; and very fine roots; slightly calcareous; moderately alkaline (pH 8.0).
TYPE LOCATION: Utah County, Utah about 1/2 mile east of Alpine; 1,500 feet east and 1,250 feet north of the southwest corner, sec. 19, T. 4 S., R. 2 E.
RANGE IN CHARACTERISTICS: The mollic epipedon is 20 to 35 inches thick and organic matter decreases irregularly or remains above 0.5 percent to a depth of 50 inches. Mean annual soil temperature is 47 to 52 degrees F, and average summer temperature is 67 to 70 degrees F. The soils are mildly alkaline or moderately alkaline and slightly calcareous to strongly calcareous. The 10 to 40 particle size control inch section is loam, silt loam or fine sandy loam, averaging less than 18 percent clay and more than 15 percent sand coarser than very fine sand. Below 49 inches textures range from sand to loam and may be gravelly. Some mottling occurs below a depth of 40 inches in some pedons.
The A horizon has hue of 10YR or 2.5Y, value of 3 to 5 dry, 2 or 3 moist and chroma of 2 or 3. Texture is loam or sandy loam. Clay content is 10 to 18 percent. Rock fragment content is 0 to 15 percent. Carbonate equivalent is 1 to 15 percent. Reaction is mildly alkaline or moderately alkaline.
The C horizon has hue of 10YR, 2.5Y or 7.5YR, value of 4 to 6 dry, 2 to 4 moist, and chroma of 1 to 4. Texture is stratified loam and sandy loam and many have thin strata of clay loam. Clay content averages 10 to 18 percent. Rock fragment content average 0 to 15 percent. Pockets of gravelly loamy sand are common. Carbonate equivalent is 1 to 15 percent. Reaction is mildly alkaline or moderately alkaline.
COMPETING SERIES: These are the Endersby, Evans, Leavenworth, Narcisse, Patit Creek and Pleasant View series. Endersby, Evans, Leavenworth, Narcisse and Patit Creek soils are all noncalcareous throughout. Pleasant View soils have gravelly particle size control sections, are noncalcareous in the A horizon and have a Bk horizons. Patit Creek soils have more than 50 percent rock fragments in the lower part of the particle size control section.
GEOGRAPHIC SETTING: The Redola soils are at elevations of 4,500 to 6,000 feet. Slopes are 0 to 9 percent. The soils occur on nearly level to sloping alluvial fans, flood plains, stream terraces and are formed in mixed alluvium derived from a wide range of parent material, mainly limestone, sandstone, and quartzite. The climate is dry or moist subhumid. The average annual precipitation is 12 to 20 inches. The mean annual temperature is 47 to 52 degrees F, mean summer temperature is 65 to 70 degrees F, and the freeze-free period is 100 to 180 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Antelope Springs, Eastcan, Heist, Hiko Peak, Kirkham, Pleasant Vale, Pleasant Grove, Steed, and Sunset soils. Antelope Springs soils have a salt and alkali affected Bt horizon. Eastcan, Kirkham and Taylorsville soils have more than 18 percent clay in the particle size control section. Kirkham and Taylorsville soils also have less than 15 percent sand greater than very fine sand. Kirkham soils also have a seasonal high water table. Pleasant Vale and Steed soils have mollic epipedons less than 20 inches thick. Pleasant Grove, Hiko Peak and Steed soils have more than 35 percent rock fragments. Antelope Springs, Heist, Hiko Peak and Taylorsville soils lack mollic epipedons. Sunset soils have a seasonal high water table.
DRAINAGE AND PERMEABILITY: Well drained; slow runoff; moderate permeability.
USE AND VEGETATION: Irrigated cropland produces small grains, corn, alfalfa, orchards and pasture. Native vegetation is basin big sagebrush, cheatgrass, basin wildrye, western wheatgrass and weeds.
DISTRIBUTION AND EXTENT: Western California and along the Wasatch Front in north-central Utah. These soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Utah County, Utah, 1972.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon--the zone of dark colored soil material that is
not massive from the soil surface to a depth of 20 inches. (A1, A2 horizons)
Cumulic feature--the mollic epipedon in this soil is 20 to 35
inches thick.
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.