LOCATION WOODS CROSS UTEstablished Series
TAXONOMIC CLASS: Fine, smectitic, mesic Cumulic Endoaquolls
TYPICAL PEDON: Woods Cross silty clay loam - cultivated
(Colors are for dry soils unless otherwise noted.)
Ap--0 to 6 inches; dark gray (10YR 4/1) silty clay loam, black (10YR 2/1) moist; weak medium and fine granular structure; slightly hard, friable, slightly sticky, plastic; many medium and fine roots; many medium and fine pores; slightly calcareous; mildly alkaline (pH 7.5); abrupt smooth boundary. (5 to 10 inches thick. )
A--6 to 37 inches; dark gray (l0YR 4/1) silty clay loam, black (10YR 2/1) moist; few fine distinct yellowish brown (10YR 5/6) redoximorphic concentrations; weak medium, subangular blocky structure; very hard, firm, sticky, plastic; many medium and fine roots; many medium and fine pores; slightly calcareous; mildly alkaline (pH 7.6); abrupt smooth boundary. (15 to 40 inches thick.)
Cg--37 to 72 inches; light gray (5Y 7/1) silty clay, gray (5Y 5/1) moist; common distinct yellowish brown (10YR 5/6) redoximorphic concentrations; weak medium and fine subangular blocky structure; very hard, firm, very sticky, very plastic; few fine roots; few fine pores; noncalcareous, mildly alkaline (pH 7.7).
TYPE LOCATION: Davis County, Utah; 1,000 feet south and 300 feet east of the north 1/4 corner of Sec. 25, T. 2 N., R. 1W.
RANGE IN CHARACTERISTICS: A layer of peat 1 1/2 to 3 inches thick is at the surface in many places. Reaction is mildly alkaline to neutral and the soil is noncalcareous or slightly calcareous. Texture of the 10 to 40 inch control section is silty clay or heavy silty clay loam. The soil is saturated at 1 to 2 feet, unless drained,
The A horizon has hues of 10YR and 2.5Y, values of 3 or 4 dry, and 2 or 3 moist, and chromas of 1 or less. Distinct redoximorphic concentrations are within 30 inches of the surface. The A horizon contains 4 to 10 percent organic matter.
The C horizon has hues of 2.5Y or 5Y, values of 4 through 7 dry, and 2 through 5 moist, and chromas of 2 or less. Texture is dominantly silty clay or silty clay loam, but the horizon contains thin lenses of coarser material ln some places. Buried A horizons are common.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Woods Cross soils are on smooth to slightly undulating, nearly level to gently sloping, broad alluvial fans and flood plains. Slopes are 0 to 3 percent. The soils have formed in alluvium and lake sediments derived from gneiss, schist, granite, quartzite and sandstone. The climate is dry subhumid. The mean annual air temperature ranges from 45 to 52 degrees F., the average summer temperature from 65 to 73 degrees F., and the frost-free season from 120 to 175 days. The average annual precipitation ranges from 14 to 18 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: Woods Cross soils are in the same general area as the competing Draper, Logan, and Ironton soils and the Airport soils. Airport soils have natric horizons and their mollic epipedons are less than 24 inches thick.
DRAINAGE AND PERMEABILITY: Poorly drained. Runoff is slow or very slow, and permeability is slow or very slow.
USE AND VEGETATION: Largely used for meadow hay and pasture. Some areas have been drained and are used for general crops under irrigation. The native vegetation is mostly wiregrass, sedges and saltgrass.
DISTRIBUTION AND EXTENT: Woods Cross soils are mainly in north central Utah. They are of small extent. MLRA 28A.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Davis County, Utah (Davis-Weber Area), 1967.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from the surface to 37 inches (Ap and A1 horizons).
Particle-size control sections - the zone from 10 to 40 inches.
Classification: Keys to Soil Taxonomy, Eighth Edition, 1998.