LOCATION CLEMS ID+CAEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Xeric Haplocambids
TYPICAL PEDON: Clems fine sandy loam, orchard. (Colors are for dry soil unless otherwise noted.)
Ap--0 to 9 inches; grayish brown (10YR 5/2) fine sandy loam, very dark grayish brown (10YR 3/2) moist; weak thin platy structure that parts to weak very fine granular structure; soft, very friable, nonsticky, nonplastic; many fine and few coarse roots; many very fine irregular pores; neutral (pH 7.0); abrupt smooth boundary. (3 to 9 inches thick)
Bw1--9 to 19 inches; brown (10YR 5/3) fine sandy loam, very dark grayish brown (10YR 3/2) moist; very weak coarse prismatic structure that parts to weak medium and coarse subangular blocky structure; soft, very friable, nonsticky, nonplastic; many fine and few coarse roots; common very fine pores; very thin slightly darker coatings on vertical faces of prisms; neutral (pH 6.9); clear smooth boundary. (3 to 12 inches thick)
Bw2--19 to 33 inches; brown (10YR 5/3) fine sandy loam, dark brown (10YR 3/3) moist; weak medium subangular blocky structure; hard, very friable, nonsticky, nonplastic; many fine and few coarse roots; common very fine pores; neutral (pH 6.9); gradual smooth boundary. (10 to 20 inches thick)
C--33 to 52 inches; light brownish gray (10YR 6/2) fine sandy loam, dark grayish brown (10YR 4/2) moist; massive; soft, very friable, nonsticky, nonplastic; few very fine roots; common very fine pores; neutral (pH 7.1); abrupt smooth boundary. (7 to 25 inches thick)
2Ck1--52 to 58 inches; light gray (10YR 7/2) silt loam,
grayish brown (10YR 5/2) moist; massive; very hard, very firm, nonsticky, nonplastic; slightly effervescent surrounded by strongly effervescent material; moderately alkaline (pH 8.1); abrupt smooth boundary. (0 to 12 inches thick)
2Ck2--58 to 60 inches; white (10YR 8/2) silt loam; massive; very hard, very firm, nonsticky, nonplastic; strongly calcareous; moderately alkaline (pH 8.1).
TYPE LOCATION: Payette County, Idaho; about 2.5 miles south of Payette; 100 feet south and 1,200 feet west of the center section 15, T. 8 N., R. 5 W.
RANGE IN CHARACTERISTICS:
Average annual soil temperature - 49 to 54 degrees F.
Average summer soil temperature - 65 to 71 degrees F.
Soil moisture - dry at depths of 8 to 24 inches for 60 to 90 days within 3 months following the summer solstice
Control section 10 to 40 inch depth - average SL, FSL, VFSL with less than 18 percent clay and less than 15 percent coarse fragments
Sola thickness - 16 to 36 inches
Depth to calcareous materials - 45 to 60 inches
Ap horizon or 7 inch layer mixed
Hue - 10YR or 2.5Y
Value - 5 or 6 dry, 3 or 4 moist
Chroma - 2 or 3 dry and moist
Organic carbon - less than 0.6 percent in some part of the upper 10 inches
Bw horizons
Hue - 10YR or 2.5Y
Value - 5 or 6 dry, 3 or 4 moist
Chroma - 2 or 3 dry or moist
Structure - very weak or weak prismatic and subangular blocky
Clay - some pedons faint accumulation, few thin clay films
C horizons
Hue - 10YR or 2.5Y
Value - 5 through 8 dry, 3 through 6 moist
Chroma - 2 or 3 dry and moist
Textures below 40 inches - SIL, L, SL, LS, or S
COMPETING SERIES: These are the Adkins, Bijorja (T), Briabbit, Chedehap, Crestline, Deschutes, Haybourne, Irrigon, Kecko, McClenden (T), Prosser, Rebel, Royal, Sagehill, Scooteney, Sohappy (T), Vining, and Wiehl series. All of these except Haybourne have Ck or calcareous horizons above 45 inches. Bijorja, Deschutes, Prosser, and Vining have bedrock at 20 to 40 inches. Briabbit, Chedehap, Haybourne, and Scootney soils have sandy 2C horizons at 20 to 40 inches. Irrigon and Wiehl soils have Cr horizons at 20 to 40 inches.
GEOGRAPHIC SETTING: Clems soils are in terraces at elevations of 2,000 to 4,400 feet. Slopes range from 0 to 30 percent. The soils formed in alluvium and (or) eolian deposits from mixed sources. The climate is semiarid, with dry summers, average annual precipitation of 8 to 12 inches, including 1 to 2.5 feet of snowfall. Average annual air temperature is 47 to 52 degrees F., and average frost free period is 135 to 160 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Declo,
Feltham,
Greenleaf,
Owyhee, and
Tindahay soils and the competing
Kecko soils. Declo, Greenleaf, and Owyhee soils have dominant medium textures in the control section. Feltham and Tindahay soils have dominant loamy sand control sections.
DRAINAGE AND PERMEABILITY: Well drained, slow or medium runoff, moderately rapid permeability.
USE AND VEGETATION: Mostly irrigated and used for orchards, sugar beets, small grains, hay, pasture, corn, and beans. The natural vegetation is mainly big sagebrush, bluebunch wheatgrass, Sandberg bluegrass, and cheatgrass.
DISTRIBUTION AND EXTENT: Southern and southwestern Idaho and possibly southeastern Oregon. Inextensive (7,000 to 10,000 acres).
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Minidoka Area, Idaho, 1971.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - zone from 0 to 9 inches (Ap horizon)
Cambic horizon - zone from 9 to 33 inches (Bw1 and Bw2 horizons)