LOCATION KLUG ID+MTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Xeric Haplocryolls
TYPICAL PEDON: Klug gravelly loam - on an east-facing mountain slope of 43 percent in rangeland at 7,100 feet elevation. (When described on June 22, 1983, the soil was air-dry throughout. Colors are for air-dry soil unless otherwise stated.)
A--0 to 4 inches; dark grayish brown (10YR 4/2) gravelly loam, very dark brown (10YR 2/2) moist; moderate very fine and fine granular structure; soft, very friable, nonsticky and slightly plastic; many very fine and fine roots; many very fine and fine irregular and tubular pores; 30 percent gravel; neutral (pH 7.0); clear wavy boundary.
AB--4 to 9 inches; dark brown (10YR 3/3) very gravelly loam, very dark brown (10YR 2/2) moist; weak fine subangular blocky structure parting to weak very fine and fine granular; soft, very friable, nonsticky and slightly plastic; many very fine and fine and few medium roots; many very fine and fine irregular and tubular pores; 40 percent gravel; neutral (pH 7.2); clear wavy boundary. (Combined thickness of the A and AB horizons is 8 to 11 inches)
Bw1--9 to 13 inches; brown (10YR 5/3) very gravelly loam, dark brown (10YR 3/3) moist; weak very fine and fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine and fine and few medium roots; common very fine and fine tubular pores; 45 percent gravel and 3 percent cobbles; slightly alkaline (pH 7.4); clear wavy boundary.
Bw2--13 to 20 inches; light yellowish brown (10YR 6/4) very gravelly loam, brown (10YR 4/3) moist; weak very fine and fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine and fine and few medium roots; common very fine and fine tubular pores; 50 percent gravel and 3 percent cobbles; slightly alkaline (pH 7.4); gradual wavy boundary. (Combined thickness of the Bw horizons is 9 to 13 inches)
C1--20 to 37 inches; light yellowish brown (10YR 6/4) extremely gravelly sandy loam, brown (10YR 4/3) moist; massive; soft, very friable, nonsticky and slightly plastic; common very fine and fine and few medium roots; common very fine and fine tubular pores; 55 percent gravel, 10 percent cobbles; slightly alkaline (pH 7.4); gradual wavy boundary. (5 to 19 inches thick)
C2--37 to 60 inches; light yellowish brown (10YR 6/4) extremely gravelly loam, yellowish brown (10YR 5/4) moist; massive; slightly hard, very friable, slightly sticky and slightly plastic; few very fine and fine roots; few very fine tubular pores; 40 percent gravel and 30 percent cobbles; slightly alkaline (pH 7.4).
TYPE LOCATION: Lemhi County, Idaho; about 4.5 miles southeast of Tendoy, Idaho; about 2,200 feet north and 200 feet east of the southwest corner of section 2, T.18 N., R.24 E. Latitude - 44 degrees, 55 minutes, 01 seconds North; Longitude - 113 degrees, 35 minutes, 09 seconds West.
RANGE IN CHARACTERISTICS:
Mollic thickness range - 8 to 14 inches
Average annual soil temperature - 37 to 42 degrees F. Average summer soil temperature - 49 to 54 degrees F.
Particle-size control section
Percent clay - 12 to 20 percent
Percent rock fragments - average 35 to 80 percent
A horizon
Color value, dry - 3 to 5
Value, moist - 2 or 3
Chroma - 2 or 3 moist and 2 to 4 dry
Bw horizon
Color value, dry - 4 to 6
Value, moist - 3 to 5
Chroma - 3 or 4 dry or moist
Percent rock fragments - 35 to 80 gravel, 0 to 15 cobbles Clay content - 12 to 20 percent
Reaction - neutral or slightly alkaline
Texture - GRV-L, GRX-L, GRV-SL, GRX-SL
C horizon
Color value, dry - 5 through 7
Value, moist - 4 or 5
Chroma - 2 to 4 dry or moist
Texture - GRX-L, TRV-L, GRX-SL
Percent rock fragments - 40 to 80 gravel, 0 to 30 cobbles Reaction - neutral or slightly alkaline
COMPETING SERIES: These are the Antrobus, Basinpeak (T), Broad Canyon, Decram, Fairydell, Farlow, Foxmount, Gaia (T), Grafen, Greyback, Handran, Kamack, Krackle, Lag, Maurice, McCort (T), Middlehill, Midelight, Midfork, Parachute, Rockabin, Silvercliff, Sup, Supervisor, Teemat (T), Thornburgh, Tiban, Timmercrek (T), Tinaman, and Wareagle series. Antrobus soils are calcareous throughout and have 20 to 35 percent clay in the particle-size control section. Basinpeak and Handran soils lack a cambic horizon. Broad Canyon soils have very stony or very gravelly loamy sand at 24 to 40 inches and are slightly or moderately acid. Decram, Foxmount, Grafen, Krackle, Middlehill, Parachute, Rockabin, and Supervisor soils are moderately deep. Fairydell and Silvercliff soils have a calcic horizon. Farlow soils have calcium carbonate at 6 to 20 inches. Gaia soils have lamellae and lack a cambic horizon. Greyback and Teemat soils have calcium carbonate at 7 to 15 inches. Kamack soils have an O horizon and receive 25 to 30 inches of precipitation. Lag soils have summer soil temperature of 45 to 47 degrees F., have an O horizon and support a forest plant community. Maurice soils have average annual soil temperature of 43 to 47 degrees F. McCort soils have hue of 7.5YR or 5YR in the Bw horizon. Midelight soils are deep and have a Bk horizon that is moderately or strongly alkaline. Midfork soils lack a Bw horizon and have calcium carbonate at 4 to 15 inches. Sebud soils have 20 to 35 percent clay in the particle-size control section. Sup soils are moderately acid or slightly acid throughout. Thornburgh soils have dominantly channer-size rock fragments. Tiban soils have a Bk horizon. Timmercrek soils are moderately acid or slightly acid throughout. Tineman soils have very gravelly sand at 26 to 35 inches. Wareagle soils have an O horizon and slightly or moderately acid in the Bw horizon.
GEOGRAPHIC SETTING: Klug soils are on foothills and mountain sides and have slopes of 5 to 70 percent. Elevations are 4,300 to 9,000 feet. The soils formed in slope alluvium and colluvium from quartzite, slate and granitic material. The climate is cold and moist in winter and spring, and cool and dry in summer. Average annual precipitation ranges from 13 to 22 inches. Average summer air temperature is 53 to 60 degrees F, and the average annual air temperature is 35 to 38 degrees F. Frost-free period is 10 to 60 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Lag series and the Parkay and Zeale soils. Parkay soils have mollic epipedons thicker than 16 inches and argillic horizons. Zeale soils have calcic horizons within or immediately under the mollic epipedon.
DRAINAGE AND PERMEABILITY: Well drained; medium or rapid runoff; moderate or moderately rapid permeability.
USE AND VEGETATION: The soils are used dominantly for rangeland. Vegetation is mainly three tip sagebrush, mountain big sagebrush, and Idaho fescue.
DISTRIBUTION AND EXTENT: East central Idaho. It is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Custer County, Idaho, 1999.
REMARKS: This revision (6/94) moves the type location from Custer County to Lemhi County.
Mollic epipedon - the zone from 0 to 13 inches (A, AB, and Bw1 horizons)
Cambic horizon - the zone from 13 to 20 inches (Bw2 horizon)
Particle-size control section - the zone from 10 to 40 inches (part of the Bw1, the Bw2, the C1, and part of the C2 horizons)