LOCATION LIDOS IDEstablished Series
TAXONOMIC CLASS: Fine-loamy, isotic, frigid Vitrandic Argixerolls
TYPICAL PEDON: Lidos ashy loam, forested -- on a northeast-facing slope of 48 percent at 5,380 feet elevation. When described on October 4, 1994, the soil was dry throughout. (Colors are for air-dry soil unless otherwise noted.)
Oi--0 to 1 inch; slightly decomposed forest litter.
A--1 to 9 inches; dark grayish brown (10YR 4/2) ashy loam, very dark brown (10YR 2/2) moist; moderate fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine, few medium and coarse roots; many very fine, fine and medium irregular pores; 10 percent gravel; slightly acid (pH 6.2); clear wavy boundary. (2 to 10 inches thick)
Bt1--9 to 16 inches; brown (10YR 4/3) gravelly ashy silty clay loam, dark brown (10YR 3/3) moist; strong very fine subangular blocky structure; slightly hard, friable, very sticky and very plastic; many very fine and fine, few medium and coarse roots; many very fine, fine and medium tubular pores; common distinct clay films on faces of peds and in pores; 15 percent gravel; slightly acid (pH 6.2); gradual wavy boundary. (5 to 10 inches thick)
2Bt2--16 to 22 inches; brown (10YR 5/3) gravelly silty clay loam, brown (10YR 4/3) moist; strong fine subangular blocky structure; hard, friable, very sticky and very plastic; common very fine, fine and medium, few coarse roots; many very fine, fine and medium tubular pores; common distinct clay films on faces of peds and in pores; 25 percent gravel; slightly acid (pH 6.1); gradual wavy boundary. (5 to 10 inches thick)
2Bt3--22 to 40 inches; yellowish brown (10YR 5/4) very gravelly silty clay loam, dark yellowish brown (10YR 4/4) moist; strong fine subangular blocky structure; hard, friable, very sticky and very plastic; common very fine, fine and medium, few coarse roots; many very fine, fine and medium tubular pores; many distinct clay films on faces of peds and in pores; 35 percent gravel, 5 percent cobbles; moderately acid (pH 6.0); clear wavy boundary. (10 to 20 inches thick)
2Bt4--40 to 47 inches; light yellowish brown (10YR 6/4) very gravelly silty clay loam, dark yellowish brown (10YR 4/4) moist; moderate fine subangular blocky structure; hard, friable, very sticky and very plastic; few very fine, fine, medium and coarse roots; common very fine, fine and medium tubular pores; common distinct clay films on faces of peds and in pores; 40 percent gravel, 5 percent cobbles; moderately acid (pH 5.9); clear wavy boundary. (5 to 10 inches thick)
3Eb--47 to 53 inches; very pale brown (10YR 7/4) gravelly sandy loam, yellowish brown (10YR 5/4) moist; weak fine and medium subangular blocky structure; slightly hard, very friable, slightly sticky and moderately plastic; few very fine, fine, medium and coarse roots; common very fine, fine and medium tubular pores; 20 percent gravel; moderately acid (pH 5.9); abrupt smooth boundary. (5 to 10 inches thick)
3Btb--53 to 60 inches; grayish brown (10YR 5/2) and very pale brown (10YR 7/3) silty clay, light yellowish brown (2.5Y 6/3) moist; moderate medium prismatic structure; very hard, firm, very sticky and very plastic; few very fine, fine, medium and coarse roots; few very fine, fine and medium tubular pores; many prominent clay films on faces of peds and in pores; moderately acid (pH 5.6).
TYPE LOCATION: Boise County, Idaho; about 3 miles south and 3 miles east of Banks; 1,800 feet north and 1,550 feet west of the southeast corner of section 11, T.8 N., R.3 E.; Latitude - 44 degrees, 02 minutes, 33 seconds N. and Longitude - 116 degrees, 03 minutes, 51 seconds W.; NAD 83.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness - 10 to 20 inches
Depth to buried genetic horizons - 30 to 60 inches
Depth to bedrock - greater than 60 inches
Base saturation (10 to 30 inches) - 50 to 75 percent
Particle-size control section - 27 to 35 percent clay; 15 to 35 percent rock fragments
Moisture control section - dry 45 to 75 consecutive days following the summer solstice
Average annual soil temperature - 43 to 47 degrees F.
A horizon
Value - 3 through 5 dry, 2 or 3 moist
Chroma - 2 or 3 dry or moist
Clay content - 12 to 20 percent
Rock fragments - 0 to 15 percent gravel
Volcanic glass content - 5 to 20 percent
Acid oxalate extract A1+1/2 Fe - 0.4 to 1.2 percent
Reaction - moderately acid or slightly acid
Bt1 horizon
Value - 4 through 6 dry, 3 or 4 moist
Chroma - 2 or 3 dry or moist
Clay content - 27 to 35 percent
Rock fragments - 0 to 10 percent cobbles, 15 to 25 percent gravel and 15 to 35 percent total
Volcanic glass content - 5 to 10 percent
Acid oxalate extract Al+1/2 Fe - 0.4 to 1.0 percent
Reaction - moderately acid or slightly acid
2Bt horizons
Value - 5 or 6 dry, 3 or 4 moist
Chroma - 3 or 4 dry or moist
Clay content - 27 to 35 percent
Rock fragments - 0 to 10 percent cobbles, 25 to 50 percent gravel and 25 to 60 percent total
Reaction - moderately acid or slightly acid
3Eb horizon
Value - 6 or 7 dry, 4 or 5 moist
Chroma - 3 or 4 dry or moist
Clay content - 10 to 18 percent
Rock fragments - 15 to 35 percent gravel
3Btb horizon
Hue - 10YR or 2.5Y
Value - 5 through 7 dry, 4 through 6 moist
Chroma - 2 through 4 dry or moist
Clay content - 40 to 50 percent
Reaction - moderately acid or slightly acid
COMPETING SERIES: These are the
Bly,
Hess,
Melhorn,
Raycreek (T),
Salcreek (T) and
Vangoe (T) series. All these soils lack buried genetic horizons. Bly soils have mollic epipedons 20 to 30 inches thick and durinodes in the lower argillic horizon. Hess soils are 40 to 60 inches deep to bedrock. Melhorn soils do not have coarse loamy buried E horizons or clayey buried Bt horizons. Raycreek soils are 20 to 40 inches deep to bedrock. Salcreek soils have greater than 50 percent sand in the particle-size control section and rock fragments are dominantly of glacial till origin. Vangoe soils have mollic epipedons 20 to 33 inches thick and are 40 to 60 inches deep to bedrock.
Runyon (T) soils have a similar classification with mixed mineralogy and is 20 to 40 inches to a paralithic contact (vesicular basalt).
GEOGRAPHIC SETTING: Lidos soils are on mountains slopes and hill backslopes and footslopes at elevations of 3,850 to 5,900 feet. These soils formed in colluvium from basalt mixed with volcanic ash in the upper part over alluvium from fine pyroclastic materials and basalt. Slopes range from 4 to 65 percent. The average annual precipitation is 26 to 32 inches. The average annual temperature is 41 to 45 degrees F. The frost-free period is 60 to 90 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Hess and the Cleymor and Klicker series. Cleymor and Hess soils are on concave positions and are clayey. Klicker soils are on convex positions and are moderately deep and loamy-skeletal.
DRAINAGE AND PERMEABILITY: Well drained; medium to very rapid runoff; slow permeability.
USE AND VEGETATION: Lidos soils are used mainly for timber production and woodland grazing. Native vegetation is Douglas-fir, ponderosa pine and mallow ninebark.
DISTRIBUTION AND EXTENT: West-central Idaho. MLRA 43b. Lidos soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Boise County Area, Idaho, Parts of Ada and Boise Counties, 2005.
REMARKS: Diagnostic horizons and features recognized in this pedon:
Mollic epipedon - zone from 1 to 16 inches (A and 2Bt1 horizons)
Vitrandic feature - zone from 1 to 16 inches (A and 2Bt1 horizons)
Argillic horizons - zone from 9 to 47 inches (2Bt1, 2Bt2, 2Bt3 and 2Bt4 horizons) and from 53 to 60 inches (3Btb horizon)
Particle-size control section - zone from 9 to 29 inches
Buried genetic horizons - zones from 47 to 53 inches (3Eb horizon) and from 53 to 60 inches (3Btb horizon)
Soil moisture regime - xeric
All depths related to diagnostic horizons and features listed in the range of characteristics are measured from the top of the first mineral horizon.