LOCATION KADLETZ IDEstablished Series
TAXONOMIC CLASS: Sandy-skeletal, mixed, frigid Typic Torriorthents
TYPICAL PEDON: Kadletz very gravelly loam - on a 4 percent south-facing slope at an elevation of 5,200 feet in rangeland. (Colors are for dry soil unless otherwise noted. When described on October 25, 1979, the soil was dry throughout.)
A--0 to 2 inches; pale brown (10YR 6/3) very gravelly loam, brown (10YR 4/3) moist; weak very thin and thin platy structure; soft, very friable nonsticky and nonplastic; common very fine and few fine roots; many very fine tubular and many very fine irregular pores; 35 percent pebbles, 2 percent cobbles; slightly alkaline (pH 7.6); clear wavy boundary. (1 to 4 inches thick)
BA--2 to 5 inches; pale brown (10YR 6/3) gravelly loam, brown (10YR 5/3) moist; weak very fine granular structure; soft, very friable, slightly sticky, and slightly plastic; common very fine and few fine roots; many very fine tubular and irregular pores; 30 percent pebbles, 3 percent cobbles; slightly alkaline (pH 7.4); clear wavy boundary. (2 to 4 inches thick)
Bw1--5 to 8 inches; light yellowish brown (10YR 6/4) very gravelly loam, yellowish brown (10YR 5/4) moist; weak very fine subangular blocky structure; soft, very friable, slightly sticky, and slightly plastic; many very fine and few fine roots; many very fine irregular and tubular pores; 40 percent pebbles, 3 percent cobbles, 5 percent stones; neutral (pH 7.2); clear wavy boundary. (2 to 4 inches thick)
2Bw2--8 to 12 inches; light yellowish brown (10YR 6/4) very gravelly loamy sand, yellowish brown (10YR 5/4) moist; single grain; loose; many very fine and few fine roots; many very fine and common fine irregular pores; 45 percent pebbles, 5 percent cobbles, 2 percent stones; neutral (pH 7.2); clear wavy boundary. (3 to 6 inches thick)
2Bkq1--12 to 44 inches; very pale brown (10YR 7/4) extremely gravelly loamy coarse sand, light yellowish brown (10YR 6/4) moist; single grain; loose; few very fine roots; many very fine and common fine irregular pores; 50 percent pebbles, 10 percent cobbles, 2 percent stones; strongly effervescent; lime and silica layers less than 2 millimeters thick on undersides of rock fragments; slightly alkaline (pH 7.8); abrupt wavy boundary. (20 to 40 inches thick)
2Bkq2--44 to 60 inches; very pale brown (10YR 7/4) extremely gravelly loamy coarse sand, light yellowish brown (10YR 6/4) moist; massive; 60 percent of horizon is hard and firm, 20 percent is very hard and very firm, 20 percent loose; dead root mats at the abrupt boundary at 44 inches; few very fine tubular pores; 50 percent pebbles, 10 percent cobbles, 2 percent stones; strongly effervescent; lime and silica layers less than 2 millimeters thick on rock fragments; strongly alkaline (pH 8.6).
TYPE LOCATION: Custer County, Idaho; about 3 miles southeast of May, Idaho; about 1,100 feet west and 2,200 feet north of the southeast corner, sec. 5, T. 14 N., R. 22 E. Latitude - 44 degrees, 34 minutes, 20 seconds North; Longitude - 113 degrees, 52 minutes, 30 seconds West.
RANGE IN CHARACTERISTICS:
Average annual soil temperature - 39 to 43 degrees F.
Control section; percent clay - 1 to 7
Rock fragments - 50 to 80 percent
Depth to carbonates - 10 to 18 inches
Depth to sand and gravel - 5 to 12 inches
A horizon
Value - 4 or 5, moist
Reaction - neutral or slightly alkaline
2Bkq horizon
Value - 6 or 7 dry, 5 or 6 moist
Rock fragments - 60 to 85 percent
Texture - GRX-LCOS, GRX-COS
Reaction - moderately to very strongly alkaline
COMPETING SERIES: These are the Dunul and Saguache series. Dunul soils are calcareous 4 to 10 inches from the surface. Saguache soils are noncalcareous to depths of more than 40 inches. Dunul and Saguache soils lack silica pendants on rock fragments.
GEOGRAPHIC SETTING: Kadletz soils are on outwash fans and fan terraces and have slopes of 2 to 6 percent. Elevations are 4,800 to 5,800 feet. The soils formed in alluvium derived dominantly from quartzite. The climate is cold and moist in winter and dry in summer. Average annual precipitation is 6 to 8 inches. Average summer air temperature is 60 to 65 degrees F. Average annual air temperature is 38 to 41 degrees F. Frost-free period is 60 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Leatherman, Pahsimeroi, Ringle, Simeroi, Snowslide, and Whitecloud soils on outwash and fan terraces. Snowslide and Simeroi soils have loamy-skeletal control sections. Leatherman soils are shallow to a duripan and have cryic soil temperature regimes. Pahsimeroi and Whitecloud soils have an aridic moisture regime bordering on xeric and have more organic carbon in the surface layer than Kadletz soils. Ringle soils have a calcic horizon within 40 inches of the surface and are calcareous in the upper soil to a depth of 7 inches after mixing.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; slow runoff; permeability is moderate over rapid.
USE AND VEGETATION: Rangeland. Vegetation is mainly shadscale, Indian ricegrass, needleandthread grass, bottlebrush squirreltail, and bud sagebrush.
DISTRIBUTION AND EXTENT: East-central Idaho. These soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Lemhi County, Idaho, 1999.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from 0 to 5 inches (A and BA horizons)
The particle-size control section is the zone from 10 to 40 inches (part of the 2Bw2 horizon and part of the 2Bkq1 horizon)