LOCATION MAPLE HOLLOW UTEstablished Series
TAXONOMIC CLASS: Fine, smectitic, mesic Typic Argixerolls
TYPICAL PEDON: Maple Hollow loam - rangeland. (colors are for air-dry soil unless otherwise stated.)
A1--0 to 2 inches; grayish brown (10YR 5/2) loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; slightly hard, friable, slightly sticky, slightly plastic; many very fine and fine roots; few very fine irregular pores; neutral (pH 6.6); abrupt smooth boundary. (2 to 6 inches thick.)
A2--2 to 8 inches; brown (10YR 5/3) clay loam, very dark grayish brown (10YR 3/2) moist; weak thin platy structure; slightly hard, friable, slightly sticky, slightly plastic; many very fine and fine roots; few very fine irregular pores; neutral (pH 6.6); clear smooth boundary. (0 to 10 inches thick.)
Bt1--8 to 16 inches; reddish brown (5YR 5/3) clay loam, dark reddish brown (5YR 3/3) moist; weak fine and medium subangular blocky structure; hard, firm, sticky, plastic; many very fine and fine roots; few very fine and fine tubular pores; thin continuous clay films on faces of peds; neutral (pH 6.6); clear smooth boundary. (5 to 15 inches thick.)
Bt2--16 to 44 inches; light reddish brown (5YR 6/4) clay, reddish brown (5YR 4/4) moist; moderate medium subangular blocky structure; very hard, very firm, very sticky, very plastic; common very fine and fine roots, common very fine tubular pores; moderately thick continuous clay films on faces of peds; neutral (pH 6.8); abrupt wavy boundary. (7 to 24 inches thick)
Bk--44 to 60 inches; reddish brown (5YR 5/3) loam, pink (5YR 7/3) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; few very fine roots; strongly effervescent, calcium carbonate occurs in blotches, pockets and filaments; moderately alkaline (pH 8.2).
TYPE LOCATION: Millard County, Utah; about 6.5 miles northeast of Fillmore, Utah. About 2500 feet east, 1400 feet north of the southwest corner Section 10, T.20S., R.3W., 39 degrees, 05 minutes and 06 seconds north latitude and 112 degrees, 10 minutes and 29 seconds west longitude.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 48 ot 50 degrees F. and the mean summer soil temperature at a depth of 20 inches is 63 to 66 degrees F. These soils are continually dry for more than 60 consecutive days during the summer in more than 7 out of 10 years. The moisture regime is Xeric bordering on Aridic.
The mollic epipedon ranges from 10 to 16 inches thick. Depth to the argillic horizon is 5 to 15 inches. Depth to secondary carbonates is greater than 36 inches. The particle size control section averages 35 to 50 percent clay and 0 to 15 percent rock fragments.
The A horizon has hue of 5YR to 10YR, value of 4 or 5 dry, 2 or 3 moist, and chroma of 2 or 3. It is neutral to slightly alkaline.
The Bt horizon has hue of 5YR to 10YR, value of 4 to 6 dry, 2 to 4 moist, and chroma of 3 to 6. It is clay loam or clay. It has thin to moderately thick and continuous clay films on faces of peds. Effervescence is none to slight. It is neutral to slightly alkaline.
The Bk horizon has hue of 5YR or 7.5YR, value of 5 to 7 dry, 4 to 6 moist, and chroma of 2 to 4. It is loam or clay loam. Effervescence is slight to strong. It is mildly to moderately alkaline. Rock fragment content is 0 to 15 percent.
COMPETING SERIES: These are the Daphnedale (CA), Keating (OR), Midvale (ID) and Ramo (OR) series. Daphnedale soils have a paralithic contact at 20 to 40 inches. Keating soils are 20 to 40 inches to bedrock. Midvale soils have silica-iron duripan between 20 and 40 inches. Ramo soils have 15 to 35 percent rock fragments in the particle size control section.
GEOGRAPHIC SETTING: These soils are on gently sloping to steep alluvial fans with gradients of 5 to 20 percent. Elevations range from 5,400 to 6,500 feet. The climate is dry subhumid. The mean annual temperature is 46 to 52 degrees F. and the mean summer temperature is 62 to 70 degrees F. The frost-free period is 100 to 150 days. Average annual precipitation is 14 to 16 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are Borvant, Collard, Pavant, Current Spring, Kapod and Calita soils. Pavant and Borvant soils have less than 35 percent clay and are shallow to a carbonate cemented hardpan. Current Spring soils contain more than 35 percent rock fragments throughout. Kapod soils contain more than 35 percent rock fragments in the particle size control section. Calita soils have less that 35 percent clay and lack argillic horizons.
DRAINAGE AND PERMEABILITY: Well drained; medium to rapid runoff; slow permeability.
USE AND VEGETATION: Principally used as rangeland for cattle and wildlife. Principal native vegetation is big sagebrush, bitterbrush, bluebunch wheatgrass, squirreltail, and sandberg bluegrass.
DISTRIBUTION AND EXTENT: Central Utah. MLRA 28A. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Millard County, Utah; Millard County, Eastern Part Soil Survey, 1995.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from the surface to 16 inches (A1, A2 and Bt horizons).
Argillic horizon - the zone of clay accumulation from 8 to 44 inches (Bt horizon).
Calcic horizon - the zone of calcium carbonate accumulation from 44 to 60 inches (Bk horizon).
The classification is based on the "Keys to Soil Taxonomy, Eighth Edition, 1998".