LOCATION LEWISTON UT+IDEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Aquic Calcixerolls
TYPICAL PEDON: Lewiston fine sandy loam--cultivated. (Colors are for dry soil unless otherwise noted.)
Ap--0 to 10 inches; grayish brown (10YR 5/2) fine sandy loam, very dark grayish brown (10YR 3/2) moist; mixed weak fine granular and weak coarse subangular blocky structure; slightly hard, very friable, nonsticky, nonplastic; few fine roots; few fine pores; slightly calcareous; slightly alkaline (pH 7.8); clear smooth boundary. (5 to 10 inches thick)
A--10 to 13 inches; brown (10YR 5/3) fine sandy loam, dark brown (10YR 3/3) moist; mixed weak fine granular and weak coarse subangular blocky structure; slightly hard, very friable, nonsticky, nonplastic; few fine roots; few fine pores; slightly calcareous; moderately alkaline (pH 8.0); clear wavy boundary. (3 to 6 inches thick)
Ckl--13 to 22 inches; light gray (10YR 7/2) fine sandy loam, light brownish gray (10YR 6/2) moist; common medium faint grayish brown (10YR 5/2) mottles; massive; slightly hard, very friable, nonsticky, nonplastic; few fine roots; many fine and medium pores strongly calcareous; moderately alkaline (pH 8.4); clear smooth boundary. (6 to 12 inches thick)
Ck2--22 to 32 inches; light gray (10YR 7/2) fine sandy loam, grayish brown (10YR 5/2) moist; common medium faint yellowish brown (10YR 5/8) mottles; massive; slightly hard, very friable, nonsticky, nonplastic; few fine pores; strongly calcareous; strongly alkaline (pH 8.7); diffuse wavy boundary. (5 to 14 inches thick)
C--32 to 50 inches; pinkish gray (7.5YR 7/2) loamy fine sand, pinkish gray (7.5YR 6/2) moist; many medium distinct strong brown (7.5YR 5/8) mottles; massive; slightly hard, very friable, nonsticky, nonplastic; few fine pores; strongly calcareous; strongly alkaline (pH 8.6)
TYPE LOCATION: Cache County, Utah; 1 1/4 miles south and 1 1/4 miles west of Lewiston; 850 feet north and 110 feet east of the southwest corner of the northeast 1/4 of sec. 18, T 14N., R.1E.
RANGE IN CHARACTERISTICS: The mollic epipedon is 10 to 15 inches thick. Depth to the horizon of carbonate accumulation is 12 to 16 inches. The mean annual soil temperature is 47 degrees to 51 degrees F., and the mean summer soil temperature at 20 inches depth is 65 degrees to 70 degrees F. The soils are saturated with water at some period during the year unless drained. The depth to water table is 26 to 40 inches, where the soils have not been drained. The control section averages fine sandy loam.
The A horizon has value of 4 or 5 dry, 2 or 3 moist and chroma of 2 or 3, it has 1 to 3 percent organic matter, it has weak to moderate fine to medium granular or weak coarse to fine subangular blocky structure. It is mildly to strongly alkaline.
The Ck and C horizons have hue of l0YR or 7 5YR, value of 6 or 7 dry, 5 or 6 moist and chroma of 2 through 4. Textures range from loam to loamy fine sand. Reaction ranges from moderately alkaline to very strongly alkaline.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Lewiston soils are at elevations of 4,430 to 4,500 feet above sea level on nearly level to gently sloping low lake terraces with slopes of 0 to 3 percent. They formed in moderately coarse, mixed lake sediments. The climate is dry subhumid, mean annual temperature is 45 degrees to 48 degrees F., the mean summer temperature is 68 degrees to 72 degrees F., and the average annual precipitation is 13 to 17 inches. The frost-free period is 130 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Layton, Jordan, Quinney, and Trenton soils. Layton soils have loamy fine sand control sections and lack calcic horizons within 16 inches. Jordan, Quinney and Trenton soils have natric horizons, Jordan and Trenton soils are silty clay or clay in the control section.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; slow or very slow runoff; moderate permeability.
USE AND VEGETATION: Lewiston soils are used as irrigated cropland of small grains, sugar beets, corn silage, alfalfa and improved pasture. The native vegetation is inland saltgrass, foxtail, alkali sacaton, and basin wildrye.
DISTRIBUTION AND EXTENT: Northern Utah and southern Idaho. These soils are not extensive. MLRAs 13 and 28A.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona.
SERIES ESTABLISHED: Cache Area, Utah, 1969.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 13 inches (Ap and A horizons).
Calcic horizon - The zone from 13 to 22 inches based on 1971 series description horizon designations (Ck1 and Ck2 horizons).
The series was last reviewed in the field in 1971. The depths to a seasonal high water table need to be verified in the field.
There are soils named Lewiston that were correlated in the Soil Survey of Bradley County, Arkansas in 1959. These soils need future correlation to another series.