LOCATION CHECKETT UT+NV
Established Series
Rev. GCC/TAD/MJD/JBF
08/2012
CHECKETT SERIES
The Checkett series consists of shallow, well drained soils that formed in alluvium, colluvium and residuum derived dominantly from igneous, quartzite and metamorphic rocks. Checkett soils are on hills and mountains. Slopes range from 2 to 50 percent. The average annual precipitation is about 250 mm and the mean annual temperature is about 9 degrees C.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Lithic Xeric Haplargids
TYPICAL PEDON: Checkett very cobbly loam--rangeland. (Colors are for air-dry soil unless otherwise stated.)
A--0 to 5 cm; pale brown (10YR 6/3) very cobbly loam, dark grayish brown (10YR 4/2) moist; very thin platy structure; soft, friable, slightly sticky and slightly plastic; few fine roots; common fine vesicular pores; 3 percent stones, 23 percent cobbles and 20 percent gravel; strongly effervescent; moderately alkaline (pH 8.4); clear smooth boundary. (5 to 10 cm thick)
Bk--5 to 15 cm; brown (10YR 5/3) very cobbly clay loam, brown (7.5YR 4/2) moist; weak fine subangular blocky structure; hard, friable, slightly sticky and moderately plastic; few fine and medium roots; few fine tubular pores; common thin clay films as bridges; 3 percent stones, 23 percent cobbles and 20 percent gravel; strongly effervescent, carbonates are in threadlike soft masses; moderately alkaline (pH 8.4); gradual smooth boundary. (0 to 18 cm thick)
Bt--15 to 41 cm; brown (7.5YR 5/3) very cobbly clay loam, reddish brown (5YR 4/4) moist; moderate fine subangular blocky structure; very hard, firm, moderately sticky and moderately plastic; few fine roots; few fine pores; common thin clay films; 3 percent stones, 23 percent cobbles and 20 percent gravel; strongly effervescent; moderately alkaline (pH 8.2); gradual wavy boundary. (8 to 38 cm thick)
BC--41 to 48 cm; pinkish gray (7.5YR 7/2) very cobbly loam, brown (7.5YR 5/3) moist; weak fine subangular blocky structure; soft, friable, slightly sticky and slightly plastic; few fine and very fine roots; 3 percent stones, 23 percent cobbles and 20 percent gravel; strongly effervescent; strongly alkaline (pH 8.6); abrupt irregular boundary. (0 to 10 cm thick)
R--48 cm; fractured quartzite bedrock.
TYPE LOCATION: Millard County, Utah; 2 miles south and 1/2 mile east of microwave tower; west slope of ridge about 1,750 feet north and 2,000 feet west of the southeast corner of sec. 29, T. 20 S., R. 9 W.; Red Pass USGS 7.5 minute quadrangle; latitude 39 degrees 02 minutes 37 seconds N and longitude 112 degrees 53 minutes 8 seconds W; NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry; moist in winter and spring, and intermittently moist in the upper part for 10 to 20 days cumulative due to convection storms between July and September; aridic bordering on xeric soil moisture regime.
Mean annual soil temperature: 8 to 12 degrees C.
Depth to a paralithic contact: 36 to 50 cm.
Reaction: Slightly alkaline through strongly alkaline.
Particle-size control section - Percent clay: Average 18 to 35 percent.
Rock fragments: 35 to 60 percent, mainly cobbles.
A horizons
Hue: 10YR or 7.5YR.
Value: 5 through 7 dry, 4 or 5 moist.
Chroma: 2 or 3, dry or moist.
Bt horizons; BC and Bk horizons (when present).
Hue: 10YR or 5YR.
Value: 5 through 7 dry, 4 or 5 moist.
Chroma: 2 through 4, dry or moist.
Texture: Loam, sandy clay loam, or clay loam.
COMPETING SERIES: These are the
Atlow,
Boomstick,
Chubard,
Cottle,
Doorkiss,
Fortyday,
Gabbvally,
Hooplite,
Nevo,,
Olac, Old Camp,
Phliss,
Richinde,
Rowel,
Soughe,
Stewval and
Thike series.
Atlow,
Cottle, Dorrkiss, fortyday,
Gabbvally,
Olac,
Old Camp, and
Soughe soils are noncalcareeous throughout.
Boomstick and
Phliss are dominated by channers.
Chubard, Gabbvalley,
Hooplite,
Nevo, Olac,
Rowel and
Stewval soils are less than 36 cm to bedrock.
Thike soils have less than 18 percent clay in the particle-size control section.
Richinde soils contain 15 to 30 percent volcanic glass in the .02 to 2 mm fraction.
GEOGRAPHIC SETTING: Checkett soils are mountains hills and ridgetops. These soils formed in residuum colluviums, and slope alluvium derived from igneous, quartzite, and metamorphic rocks. Slopes are 2 to 50 percent. Elevations are 1,340 to 2,330 meters. The mean annual precipitation is 200 to 300 mm, mean annual temperature is 7 to 11 degrees C, and the frost-free season is 90 to 140 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Berent,
Heist, Hiko Peak, Hiko Springs, and
Penoyer soils. All of these soils lack a lithic contact within 100 cm and do not have argillic horizons.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; medium to high runoff; moderately high saturated hydraulic conductivity.
USE AND VEGETATION: These soils are used mainly for livestock grazing by cattle and sheep. The native vegetation is big sagebrush, black sagebrush, Indian ricegrass, galleta, horsebrush and bottlebrush squirreltail. These soils are correlated to semidesert ecological sites in Utah.
DISTRIBUTION AND EXTENT: East Central Nevada. MLRA 28A. These soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Millard County (Delta Area Soil Survey), Utah 1970..
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 15 cm (A and Bk horizons).
Argillic horizon - The zone from 15 to 41 cm (Bt horizon).
Lithic contact - The boundary at 48 cm (R layer).
Particle-size control section - The zone from 15 to 41 cm (Bt horizon).
National Cooperative Soil Survey
U.S.A.