LOCATION HACCKE MT
Established Series
Rev. JMS/EMR/JCK
06/2012
HACCKE SERIES
The Haccke series consists of very deep, well drained soils that formed in alluvium or colluvium and eolian deposits. These soils are on fan remnants, eroded fan remnants, and hills. Slopes are 0 to 40 percent. Mean annual precipitation is about 368 mm, and mean annual temperature is about 6 degrees C.
TAXONOMIC CLASS: Fine-silty, mixed, superactive, frigid Inceptic Haplustalfs
TYPICAL PEDON: Haccke silt loam, in rangeland on a 6 percent slope at 1,420 meters elevation. (Colors are for dry soil unless otherwise noted.)
A--0 to 15 cm; light brownish gray (10YR 6/2) silt loam, very dark grayish brown (10YR 3/2) moist; strong very thick platy structure; slightly hard, friable, slightly sticky and slightly plastic; many fine roots; many fine tubular pores; 5 percent gravel; neutral (pH 7.2); abrupt smooth boundary. (8 to 20 cm thick)
Bt--15 to 38 cm; light yellowish brown (10YR 6/4) silt loam, dark yellowish brown (10YR 4/4) moist; moderate medium columnar structure parting to moderate medium subangular blocky structure; hard, firm, very sticky and very plastic; common fine roots; common fine tubular pores; many distinct clay films on ped faces; 5 percent gravel; slightly alkaline (pH 7.4); abrupt smooth boundary (15 to 31 cm thick)
Bkn1--38 to 71 cm; very pale brown (10YR 7/4) silt loam, dark yellowish brown (10YR 4/4) moist; moderate medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; few fine roots; common fine irregular pores; 5 percent gravel; common fine calcium carbonate masses; violently effervescent; strongly alkaline (pH 8.6); gradual wavy boundary. (10 to 66 cm thick)
Bkn2--71 to 122 cm; very pale brown (10YR 7/3) silt loam, brown (10YR 4/3) moist; weak fine subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; few fine roots; common fine irregular pores; 5 percent gravel; many medium calcium carbonate masses; violently effervescent; strongly alkaline (pH 9.0); gradual wavy boundary. (18 to 60 cm thick)
C--122 to 152 cm; very pale brown (10YR 8/3) fine sandy loam, yellowish brown (10YR 5/4) moist; massive; soft, very friable, moderately sticky and moderately plastic; few fine roots; few fine irregular pores; 5 percent gravel; strongly effervescent; moderately alkaline (pH 8.2).
TYPE LOCATION: Corley Gulch topographic quadrangle, Ravalli County, Montana; 115 meters west and 530 meters north of the SE corner of sec. 15, T. 8 N., R. 19 W; UTM zone 12, 273477E, 5148078N, NAD 83.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 5 to 8 degrees C
Depth to secondary calcium carbonate accumulation - 25 to 40 cm
Depth to sodium accumulation - 25 to 40 cm
This soil typically has the character of a natric horizon but the sodium has been transported deeper into the profile.
Some pedons have an E horizon in place of the A horizon.
A (or E) horizon
Value: 5 or 6 dry; 2 to 4 moist
Chroma: 2 to 4 dry or moist
Texture: silt loam or loam
Clay content: 12 to 24 percent
Rock fragments: 0 to 10 percent gravel
Reaction: pH 6.8 to 7.8
Bt horizon
Value: 3 or 4 moist
Chroma: 4 or 5 dry or moist
Texture: silt loam or silty clay loam
Clay content: 20 to 34 percent
Rock fragments: 0 to 5 percent gravel
EC (mmhos/cm): 0 to 4
Sodium adsorption ratio: 0 to 6
Reaction: pH 7.4 to 8.2
Bkn1 horizon
Value: 6 to 8 dry; 4 or 5 moist
Chroma: 4 or 5 dry or moist
Texture: silt loam or loam
Clay content: 16 to 24 percent
Rock fragments: 0 to 10 percent gravel
Calcium carbonate equivalent: 5 to 20 percent (15 to 20 percent with 18 percent clay or more)
EC (mmhos/cm): 0 to 4
Sodium adsorption ratio: 8 to 13
Reaction: 8.2 to 8.8
Bkn2 horizon
Value: 6 or 7 dry; 4 or 5 moist
Texture: silt loam
Clay content: 12 to 20 percent
Rock fragments: 0 to 10 gravel
Calcium carbonate equivalent: 5 to 20 percent (15 to 20 percent with 18 percent clay or more)
EC (mmhos/cm): 2 to 6
Sodium adsorption ratio: 13 to 20
Reaction: 8.4 to 9.2
C horizon
Value: 6 to 8 dry; 4 or 5 moist
Chroma: 3 to 5 dry or moist
Texture: fine sandy loam or loamy fine sand
Clay content: 6 to 18 percent
Rock fragments: 5 to 40 percent--0 to 35 percent gravel, 0 to 5 percent cobbles
Calcium carbonate equivalent: 0 to 5 percent
EC (mmhos/cm): 0 to 1
Sodium adsorption ratio: 0 to 5
Reaction: 7.4 to 8.2
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING:
Landform - eroded fan remnants, fan remnants, and hills
Elevation - 1,010 to 1,905 meters
Slope - 0 to 40 percent
Parent material - alluvium, colluvium, and eolian deposits
Climate - long, cold winters; moist springs; warm summers
Mean annual temperature - 4 to 7 degrees C
Mean annual precipitation - 330 to 559 mm
Frost-free period - 70 to 120 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed.
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability to a depth of 122 cm and moderately rapid below.
USE AND VEGETATION: Haccke soils are used mainly for rangeland, irrigated pasture and hayland. Vegetation is chiefly mixed grasses.
DISTRIBUTION AND EXTENT: Haccke soils are of small extent in intermountain valleys of western Montana. MLRA 44A.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Ravalli County (Bitterroot Valley Area), Montana.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - from the soil surface to 15 cm (A horizon)
Argillic horizon - from 15 to 38 cm (Bt horizon)
Calcic horizon - from 38 to 122 cm (Bkn1 and Bkn2 horizons)
Horizons of sodium accumulation - from 38 to 122 cm (Bkn1 and Bkn2 horizons)
Particle-size control section - from 15 to 38 cm (Bt horizon)
Haccke soils have a frigid temperature regime and an ustic moisture regime.
National Cooperative Soil Survey
U.S.A.