LOCATION PLEASANT GROVE UTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Pachic Calcixerolls
TYPICAL PEDON: Stony loam D rangeland (Colors are for dry soil unless otherwise noted.)
All--0 to 2 inches; very dark grayish brown (10YR 3/2) stony loam, very dark brown (10YR 2/2) moist; weak fine granular structure; soft, very friable, nonsticky, slightly plastic; many fine and very fine roots; common fine and medium pores; moderately calcareous; disseminated lime; mildly alkaline (pH 7 4); clear smooth boundary. (2 to 12 inches thick)
A12--2 to 6 inches; dark grayish brown (10YR 4/2) cobbly loam, very dark brown (10YR 2/2) moist; weak thick platy structure that parts to weak fine subangular blocky structure; soft, very friable, nonsticky, slight plastic; many fine and very fine roots; few large and medium pores; moderately calcareous; disseminated lime; mildly alkaline (pH 7.7); clear smooth boundary. (O to 10 inches thick)
A13--6 to 21 inches; dark grayish brown (10YR 4/2) very cobbly light loam, very dark grayish brown (10YR 3/2) moist; weak medium and fine subangular blocky structure; soft, friable, slightly sticky, slightly plastic; many fine and few medium roots; few medium and common fine pores; moderately calcareous; disseminated lime; mildly alkaline (pH 7.6); gradual smooth boundary. (0 to 10 inches thick)
Clca--21 to 38 inches; pale brown (10YR 6/3) very cobbly light loam, brown (10YR 4/3) moist; massive; slightly hard, friable, slightly sticky, slightly plastic; common fine and few medium roots; few medium and fine pores; strongly calcareous, lime is disseminated and has moderate and thick coatings on rock fragments; mildly alkaline (pH 7 8); clear wavy boundary. (7 to 26 inches thick)
C2ca--38 to 49 inches; pale brown (10YR 6/3) very cobbly fine sandy loam, brown (10YR 4/3) moist; massive; soft, very friable, nonsticky, nonplastic; few fine roots; interstitial pores; strongly calcareous; lime is disseminated and has moderate or thick coatings on rock fragments; mildly alkaline (pH 7.8); clear wavy boundary. (6 to 20 inches thick)
C3ca--49 to 60 inches; brown (10YR 5/3) very cobbly light loam, brown (10YR 4/3) moist; massive; soft, friable, slightly sticky, slightly plastic; few fine roots; interstitial pores; strongly calcareous; lime is disseminated and has moderate or thick coatings on rock fragments; mildly alkaline (pH 7.8); clear wavy boundary. (6 to 20 inches thick)
TYPE LOCATION: Utah County, Utah; 2 miles southeast of Provo, south of Thorn Rock Products (.company; 350 feet south and 3,000 feet east of the NW corner of sec. 17, T.7S., R.3E.
RANGE IN CHARACTERISTICS: The mollic epipedon is more than 20 inches thick. The mean annual silty temperature is 47 to 54 degrees F. Clay minerals are mixed, but strongly montmor-illonitic. The soils are not usually dry, but are dry in the 7 to 20 inch section for more than 45 consecutive days. They are neutral to moderately alkaline and moderately to strongly calcareous. Lacustrine sediments are at depths of 40 to 60 inches in some pedons. The Al horizon has hue of 10YR or 2.5Y, value of 3 through 5 dry, 2 or 3 moist, and chroma of 2 or 3. It is stony or cobbly loam with 20 to 50 percent rock fragments. The Cca horizon has hue of 10YR or 2.5Y, dry value of 4 through 7, moist value of 3 through 5, and chroma of 2 or 3. It is light loam or sandy loam with more than 50 percent rock fragments by volume. Lime content ranges from 15 to 88 percent and cementation may occur with the higher lime contents. A calcic horizon immediately underlies the mollic epipedon. Below 40 inches the C horizon has hue of 10YR or 2.5Y, value of 5 or 6 dry, 4 or 5 moist, and chroma of 2 or 3. It is light loam or sandy loam with 50 to 80 percent rock fragments.
COMPETING SERIES: These are the Bingham, Blackrock, lakewin, Pleasant View, Kake, and Sterling series. Bigham, Lakewin, Rake, and Sterling soils have mollic epipedons less than 20 inches thick. Also, Bingham and Rake soils have argillic horizons. Blackrock soils have more than 18 percent clay and less than 35 percent rock fragments in the control section. Pleasant View soils have less than 35 percent rock fragments in the control section.
GEOGRAPHIC SETTING: Pleasant Grove soils are at elevations of 4,600 to 5,700 feet on sloping to very steep alluvial fans and colluvial slopes near the base of the Wasatch Mountains with slopes of 3 to 60 percent. They formed in materials derived from limestone, shale, and minor amounts of quartzite parent rocks. The climate is dry subhumid. Mean annual temperature is 49 to 52 degrees F., average summer temperature is 70 degrees F., and average annual precipitation is 14 to 18 inches. The frost free period is 150 to 170 days.
PRINCIPAL ASSOCIATED SOILS: These are the Parleys, Taylorsville, and Welby soils. These soils lack rock fragments. Parleys and Taylorsville soils have mollic epipedons less than 20 inches thick.
DRAINAGE AND PERMEABILITY: Well-drained; medium runoff; moderately rapid permeability.
USE AND VEGETATION: Irrigated cropland, mainly in orchards. Native vegetation is big sagebrush, oakbrush, rabbitbrush, wheatgrasses, and weeds.
DISTRIBUTION AND EXTENT: These soils are along the Wasatch Front of north-central Utah. They are inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Utah County, Utah, 1972.
REMARKS: Previously classified as Calcisols.
OSED scanned by NSSQA. Last revised by state 7/72.
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 Lakewood MLRA office, without review of the soil series property data. The remainder of this document has not been updated.