LOCATION LINKLETTER IDEstablished Series
TAXONOMIC CLASS: Fine, smectitic, mesic Duric Xeric Petroargids
TYPICAL PEDON: Linkletter gravelly loam on an 8 percent slightly convex northwest facing slope at an elevation of 3,500 feet in rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 3 inches; pale brown (10YR 6/3) gravelly loam, dark brown (10YR 3/3) moist; weak thin and medium platy structure parting to moderate fine and medium granular; soft, very friable, slightly sticky and slightly plastic; many fine and very fine roots; many fine and very fine vesicular and tubular pores; 15 percent rounded gravel; neutral (pH 6.7); abrupt smooth boundary. (1 to 5 inch thick)
Bw1--3 to 7 inches; brown (10YR 5/3) loam, dark brown (10YR 3/3) moist; weak fine and very fine subangular blocky structure parting to moderate fine and very fine granular; soft, very friable, slightly sticky and slightly plastic; common fine and very fine and few medium roots; common fine and coarse tubular pores; 10 percent rounded gravel; neutral (pH 6.8); gradual wavy boundary. (3 to 8 inches thick)
Bw2--7 to 16 inches; brown (10YR 5/3) loam, dark grayish brown (10YR 4/2) moist; moderate fine subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; common fine and very fine roots; common fine and medium tubular and few fine and medium irregular pores; 10 percent rounded gravel; neutral (pH 7.0); abrupt wavy boundary. (0 to 14 inches thick)
2Bt--16 to 31 inches; brown (7.5YR 5/4) clay loam, dark brown (7.5YR 4/4) moist; moderate medium and coarse prismatic structure; very hard, very firm, very sticky and very plastic; few very fine and fine roots; few very fine tubular pores; continuous faint clay films on faces of peds; 5 percent rounded gravel; neutral (pH 7.0); abrupt wavy boundary. (10 to 20 inches thick)
2Btk--31 to 40 inches; brown (7.5YR 5/4) cobbly sandy clay loam, dark brown (7.5YR 4/4) moist; moderate medium and coarse subangular blocky structure; very hard, very firm, sticky and plastic; few very fine and fine roots; few very fine and fine tubular pores; discontinuous faint clay films on faces of peds; 10 percent rounded gravel, 20 percent rounded cobbles; few fine veins and splotches of calcium carbonate; 5 percent calcium carbonate equivalent; neutral (pH 7.1); abrupt smooth boundary. (0 to 15 inches thick)
2Bk--40 to 55 inches; reddish yellow (7.5YR 6/6) gravelly sandy loam, brown (7.5YR 5/4) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine and fine roots; common very fine tubular pores; few very fine and fine pores in voids between rock fragments; common fine veins and splotches of calcium carbonate; 15 percent rounded gravel; strongly effervescent (10 percent calcium carbonate equivalent); moderately alkaline (pH 7.7); abrupt wavy boundary. (6 to 20 inches thick)
2Bkqm--55 to 67 inches; reddish yellow (7.5YR 7/6) indurated duripan, pink (7.5YR 8/4) moist; massive; continuous laminar cap is 0.5 to 2 mm thick; thickest caps coincide with layers containing the highest percentage of gravel; 30 percent rounded embedded gravel; violently effervescent.
TYPE LOCATION: Gooding County, Idaho; about 7 miles north and 4 miles east of Bliss; 1,800 feet north and 600 feet west of the southeast corner of section 5, T.5N., R.13E. Lat. 43 degrees north, 1 minute, 5 seconds; Long. 115 degrees west, 55 minutes, 54 seconds.
RANGE IN CHARACTERISTICS
Average annual soil temperature - 49 to 53 degrees F.
Depth to bedrock - more than 60 inches
Depth to duripan - 40 to 60 inches
Particle-size control section average - 35 to 45 percent clay
Depth to calcium carbonate - 30 to 40 inches
Present in some pedons - E, Bkq, 2Bkq horizons
A horizon
Value - 4 through 6 dry, 2 through 4 moist
Chroma - 3 or 4 dry or moist
Rock fragments - 15 to 30 percent gravel, 0 to 5 percent cobbles
Bw horizons
Hue - 10YR or 7.5YR
Value - 4 through 6 dry, 3 to 5 moist
Chroma - 2 to 4 dry or moist
Texture - loam, sandy clay loam, gravelly loam
Clay content - 17 to 30 percent
Rock fragments - 0 to 20 percent gravel, 0 to 5 percent cobbles
2Bt horizons
Hue - 10YR or 7.5YR
Value - 4 through 6 dry, 4 or 5 moist
Chroma - 4 or 5 dry or moist
Texture - clay loam, sandy clay, sandy clay loam
Clay content - 30 to 45 percent
Rock fragments - 0 to 10 percent gravel, 0 to 5 percent cobbles
2Btk horizons
Hue - 10YR or 7.5YR
Value - 4 through 6 dry; 4 or 5 moist
Chroma - 4 or 5 dry or moist
Texture - clay loam, sandy clay loam, cobbly sandy clay loam
Clay content - 25 to 40 percent
Calcium carbonate equivalent - 0 to 5 percent
Reaction - neutral to mildly alkaline
Rock fragments - 0 to 15 percent gravel, 0 to 25 percent cobbles
2Bk horizons
Hue - 10YR or 7.5YR
Value - 5 through 7 dry, 4 or 5 moist
Chroma - 4 through 6 dry or moist
Texture - loam, sandy loam, gravelly sandy loam, cobbly sandy loam Clay content - 15 to 25 percent
Calcium carbonate equivalent - 5 to 10 percent
Reaction - mildly or moderately alkaline
Rock fragments - 0 to 20 percent gravel, 0 to 20 percent cobbles
2Bkqm horizons
Rock fragments - 15 to 40 percent gravel, 0 to 20 percent cobbles
COMPETING SERIES: These are the Buncelvoir (T), Diaz (T), Dryvalley (T), Farmell, Glasgow, Lanktree, Oppio, Risley, Schamp, and Trunk series. Buncelvoir soils have a calcic horizon. Diaz, Glasgow, Oppio, Risley, and Trunk soils have bedrock above 40 inches. Dryvalley soils lack secondary carbonate accumulations. Farmwell soils lack a duripan. Lanktree soils have an E horizon and lack a duripan. Schamp soils lack a duripan and are strongly or very strongly alkaline in the Bk horizon.
GEOGRAPHIC SETTING: Linkletter soils are on rounded hills and terraces. Slopes range from 8 to 25 percent. The soils formed in older alluvium that has some loess influence in the upper part. Elevation ranges from 3,400 to 3,900 feet. The average annual precipitation is 9 to 11 inches, including 1.5 to 3 feet of snowfall and the average annual temperature is 48 to 51 degrees F. Frost-free period is 100 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Chilcott, Elijah, Purdam, and Vickery soils. Chilcott, Elijah, Purdam, and Vickery soils have a duripan above 40 inches. These soils are on landscape positions similar to the Linkletter soil.
DRAINAGE AND PERMEABILITY: Well drained; medium to rapid runoff; slow permeability.
USE AND VEGETATION: Used mainly for rangeland. The dominant native plant community is Wyoming big sagebrush and bluebunch wheatgrass.
DISTRIBUTION AND EXTENT: The series is located in southcentral Idaho. The series has limited extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Gooding County, Idaho, 1993.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from 0 to 3 inches (A horizon)
Cambic horizon - the zone from 7 to 16 inches (Bw2 horizon)
Argillic horizon - the zone from 16 to 40 inches (2Bt and 2Btk horizons)
Particle-size control section - the zone from 16 to 36 inches (2Bt and part of the 2Btk horizons)
Duripan - zone from 55 to 67 inches (2Bkqm horizon)