LOCATION ZADE MTEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive Ustic Argicryolls
TYPICAL PEDON: Zade loam, in forest (colors are for dry soil unless otherwise noted).
Oi--0 to 1 inch; slightly decomposed forest litter. (1 to 2 inches thick)
A--1 to 10 inches; dark grayish brown (10YR 4/2) loam, very dark gray (10YR 3/1) moist; moderate medium granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine, few medium and coarse roots; neutral (pH 7.0); clear smooth boundary. (6 to 10 inches thick)
Bt1--10 to 16 inches; dark grayish brown (10YR 4/2) sandy clay loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine and few medium roots; common distinct clay films on faces of peds and lining pores; neutral (pH 6.6); clear smooth boundary.
Bt2--16 to 37 inches; brown (10YR 4/3) clay loam, dark yellowish brown (10YR 3/4) moist; moderate medium subangular blocky structure; hard, friable, moderately sticky and moderately plastic; few very fine roots; common distinct clay films on faces of peds and lining pores; 5 percent pebbles; slightly acid (pH 6.4); gradual wavy boundary. (Combined thickness of Bt1 and Bt2 horizons is 14 to 30 inches).
Cr--37 to 60 inches; olive (5Y 5/3) interbedded soft sandstone and shale.
TYPE LOCATION: Gallatin County, Montana; 500 feet east and 1800 feet south of the NW corner of sec. 12, T.1N., R.7E.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 36 to 40 degrees F.
Mean summer soil temperature - 45 to 47 degrees F.
Moisture control section - between 4 and 12 inches; not dry in all parts for 45 consecutive days.
Mollic epipedon thickness - 10 to 16 inches.
Depth to Cr horizon - 20 to 40 inches.
A horizon - Value: 2 or 3 moist
Chroma: 1 or 2
Clay content: 15 to 25 percent
Rock fragments: 0 to 15 percent--0 to 10 percent pebbles or channers, 0 to 5 percent cobbles or flagstones
Reaction: pH 6.1 to 7.3
Bt1 horizon - Hue: 10YR or 2.5Y
Value: 4 or 5 dry; 3 or 4 moist
Chroma: 2 or 3
Texture: clay loam, sandy clay loam, loam
Clay content: 25 to 35 percent
Rock fragments: 0 to 15 percent--0 to 10 percent pebbles or channers, 0 to 5 percent cobbles or flagstones
Reaction: pH 6.1 to 7.3
Bt2 horizon - Hue: 10YR or 2.5Y
Value: 4, 5 or 6 dry; 3, 4 or 5 moist
Chroma: 3 or 4
Texture: clay loam, sandy clay loam, loam
Clay content: 25 to 35 percent
Rock fragments: 0 to 15 percent--0 to 10 percent pebbles or channers, 0 to 5 percent cobbles or flagstones
Reaction: pH 6.1 to 7.3
COMPETING SERIES:
Accola (MT) - does not have a paralithic contact above 60 inches; has a calcic horizon.
Amsden (WY) - does not have a paralithic contact above 60 inches; has horizon of secondary carbonate accumulation.
Barbarela (MT) - has a lithic contact at 40 to 60 inches.
Buffork (WY) - has more than 35 percent fine or coarser sand in the particle-size control section.
Cific (WY) - has horizon of secondary carbonate accumulation.
Coldspring (CO) - has a lithic contact at 20 to 40 inches; has a BCt horizon.
Croftshaw (NM) - does not have a paralithic contact above 60 inches.
Dewville (CO) - does not have a paralithic contact above 60 inches; has horizon of secondary carbonate accumulation.
Gebson (CO) - does not have a paralithic contact above 60 inches; has horizon of secondary carbonate accumulation.
Gelkie (CO) - does not have a paralithic contact above 60 inches; has horizon of secondary carbonate accumulation.
Inchau (WY) - has transitional BA horizon.
Kezar (CO) - has a lithic contact at 20 to 40 inches; formed in material weathered from granite.
Leavitt (WY) - does not have a paralithic contact above 60 inches; has horizon of secondary carbonate accumulation.
Lucky (CO) - has a lithic contact at 20 to 40 inches.
Lymanson (WY) - has horizons of secondary carbonate accumulation.
Michelson (MT) - has horizon of secondary carbonate accumulation.
Miracle (CO) - has a lithic contact at 20 to 40 inches.
Monaberg (MT) - does not have a paralithic contact above 60 inches.
Morset (CO) - does not have a paralithic contact above 60 inches; has a calcic horizon.
Oro Fino (MT) - has horizon of secondary carbonate accumulation.
Passcreek (WY) - has horizon of secondary carbonate accumulation; has a lithic contact at 20 to 40 inches.
Philipsburg (MT) - does not have a paralithic contact above 60 inches; has horizon of secondary carbonate accumulation.
Rainbolt (WY) - has horizon of secondary carbonate accumulation.
Tingey (UT) - does not have a paralithic contact above 60 inches; has horizon of secondary carbonate accumulation.
Tripit (WY) - is calcareous at 6 to 20 inches.
Wellsville (CO) - does not have a paralithic contact at 20 to 40 inches; has horizon of secondary carbonate accumulation.
Woosley (WY) - has horizon of secondary carbonate accumulation.
Youga (CO) - does not have a paralithic contact above 40 inches; has BCt horizon.
GEOGRAPHIC SETTING:
Landform - hills.
Elevation - 4,900 to 6,200 feet.
Slope - 15 to 70 percent.
Parent material - interbedded sandstone and shale residuum.
Climate - long, cold winters; moist springs; cool summers.
Mean annual precipitation - 20 to 24 inches.
Mean annual air temperature - 34 to 38 degrees F.
Frost-free period - 50 to 70 days.
DRAINAGE AND PERMEABILITY: Well drained; moderately slow permeability.
USE AND VEGETATION: Zade soils are used mainly for woodland and wildlife habitat. Potential native vegetation may include Douglas fir with an understory of common snowberry, western meadowrue, pinegrass and heartleaf arnica.
DISTRIBUTION AND EXTENT: Zade soils are of small extent in southwestern Montana.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Gallatin County, Montana, 1997.
REMARKS: Soil interpretation record: MT1607. Diagnostic horizons and features recognized in this pedon are: a mollic epipedon from 1 to 16 inches (A and Bt1 horizons); an argillic horizon from 10 to 37 inches (Bt1 and Bt2 horizons); a semiconsolidated layer of interbbeded sandstone and shale from 36 to 60 inches (Cr horizon); a particle size control section from 10 to 30 inches (Bt1 and Bt2 horizons). Zade soils have a cryic temperature regime and an ustic moisture regime.