LOCATION WOODROW UT+NVEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, calcareous, mesic Xeric Torrifluvents
TYPICAL PEDON: Woodrow silty clay loam - rangeland. (Colors are for dry soil unless otherwise stated.)
A1--0 to 8 cm; pale brown (10YR 6/3) silty clay loam, dark grayish brown (10YR 4/2) moist; thin platy structure; soft, friable, slightly sticky and moderately plastic; few fine and medium roots; few fine pores; strongly effervescent, carbonates are disseminated; moderately alkaline (pH 8.3); clear smooth boundary. (3 to 10 cm thick)
A2--8 to 33 cm; pale brown (10YR 6/3) stratified silty clay loam and clay loam, brown (10YR 4/3) moist; weak fine and medium subangular blocky structure; hard, firm, slightly sticky and moderately plastic; few fine roots; few fine pores; strongly effervescent, carbonates are disseminated; moderately alkaline (pH 8.3); clear wavy boundary. (8 to 25 cm thick)
C1--33 to 69 cm; light gray (10YR 7/2) stratified silty clay loam and clay loam, pale brown (10YR 6/3) moist; massive; hard, firm, moderately sticky and moderately plastic; few fine roots; few fine pores; strongly effervescent, carbonates are mostly disseminated; moderately alkaline (pH 8.4) diffuse irregular boundary. (25 to 66 cm thick)
C2--69 to 183 cm; light gray (10YR 7/2) silty clay loam laminated with thin lenses of clay loam or silt loam, light brownish gray (10YR 6/2) moist; massive; hard, firm, moderately sticky and moderately plastic; strongly effervescent, carbonates are mostly disseminated but some segregations as fine flakes or mottles; strongly alkaline (pH 8.5)
TYPE LOCATION: Millard County, Utah; about 1 mile west of Flowell. 150 feet east and 2000 feet north of the southwest corner of section 11, T. 15 S., R. 4 W.; latitude 39 degrees 32 minutes 39.3 seconds N and longitude 112 degrees 39 minutes 43.1 seconds W; NAD 83
RANGE IN CHARACTERISTICS:
Soil moisture: The soils are usually dry but are continually moist in some part of the moisture control section for 25 to 35 percent of the time the soil temperature is above 5 degrees C. The soil moisture regime is aridic bordering on xeric.
Mean annual soil temperature: 8 to 12 degrees C.
Other features: Fine stratification generally occurs throughout the profile.
Particle-size control section - Clay content: Average 28 to 35 percent.
Sand content: Less than 15 percent.
A horizon:
Hue: 10YR or 7.5YR
Value: 5 to 7 dry, 4 to 6 moist
Chroma: 2 or 3
Reaction: Slightly alkaline through strongly alkaline
Calcium carbonate equivalent: Commonly 15 to 25 percent, but can range from 10 to 40 percent
C horizon:
Hue: 10YR or 7.5YR
Value: 6 to 8 dry, 4 to 7 moist
Chroma: 2 to 4
Texture: Dominantly silty clay loam but thin lenses of silt loam, clay loam, or clay are common in most pedons. Sandy loam lenses occur in some pedons
Calcium carbonate equivalent: Commonly 15 to 25 percent, but can range from 10 to 40 percent
Exchangeable sodium percentage (ESP): 0 to 40 percent
Reaction: Moderately alkaline through very strongly alkaline
COMPETING SERIES: These are the Alovar and Genola series.
Alovar soils have hue of 2.5Y or 5Y. Genola soils have 18 to 27 percent clay.
GEOGRAPHIC SETTING: These soils are on lake terraces, alluvial fans, flood plains, and in narrow alluvial valleys. Slopes range from 0 to 5 percent. They formed in alluvium and lacustrine deposits derived from sedimentary and igneous rocks. Elevation ranges from 1,400 to 1,830 meters. The climate is semiarid. The average annual precipitation ranges from 200 to 300 mm.The mean annual temperature ranges from 7 to 11 degrees C. and the mean summer temperature ranges from 18 to 23 degrees C. The frost free period ranges from 100 to 160 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Deseret, Mellor, McCornick, and Palisade soils and the competing Genola and Oasis soils. Deseret soils have horizons of gypsum accumulation and are saturated within 100 cm for more than 90 days. Mellor soils have natric horizons. McCornick soils have calcic horizons and more than 40 percent calcium carbonate equivalent. Palisade soils have a coarse-loamy particle-size control section.
DRAINAGE AND PERMEABILITY: Well-drained; slow to medium runoff; slow permeability; moderately low saturated hydraulic conductivity.
USE AND VEGETATION: Used for irrigated crops and range. Crops are mainly alfalfa, small grains, corn, and pasture. Vegetation in the non-cultivated areas is big sagebrush, rabbitbrush, shadscale, snakeweed, and some greasewood.
DISTRIBUTION AND EXTENT: West-central Utah and parts of Nevada. MLRA 28A, and 29. This series is moderately extensive.
MLRA OFFICE RESPONSIBLE: Reno, Nevada
SERIES ESTABLISHED: Delta Area, Utah, 1919.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: The zone from the soil surface to 18 cm. (A1 and part of the A2 horizons).
Particle-size control section - the zone from 25 to 100 cm. (C1 and part of A2 and C2 horizons).