LOCATION HENNEBERRY MT
Established Series
Rev. EW-KTS-RJS
01/2012
HENNEBERRY SERIES
The Henneberry series consists of shallow, well drained soils that formed in colluvium and residuum derived from red limestone conglomerate or other red calcareous rock types. These soils are on ridges, hills and mountain slopes. Slopes are 15 to 60 percent. Mean annual precipitation is about 430 mm, and mean annual temperature is about 4 degrees C.
TAXONOMIC CLASS: Loamy-skeletal, carbonatic Lithic Calcicryepts
TYPICAL PEDON: Henneberry very gravelly loam, in rangeland, on a 25 percent slope at an elevation of 1920 meters. (colors are for dry soil unless otherwise noted)
A--0 to 13 cm; reddish brown (5YR 5/4) very gravelly loam, reddish brown (5YR 4/3) moist; moderate fine and medium granular structure, slightly hard, very friable, slightly sticky and nonplastic; many very fine and fine roots; common very fine and fine irregular pores; 30 percent gravel, 5 percent cobbles; finely disseminated calcium carbonate; strongly effervescent; moderately alkaline (pH 8.2); clear smooth boundary. (8 to 15 cm thick)
Bk1--13 to 36 cm; red (2.5YR 5/6) very gravelly loam, red (2.5YR 4/6) moist; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine roots; common very fine and fine irregular pores; 30 percent gravel, 10 percent cobbles; finely disseminated calcium carbonate and discontinuous calcium carbonate casts on fragments; violently effervescent; moderately alkaline (pH 8.4); gradual wavy boundary.
Bk2--36 to 48 cm; light red (2.5YR 6/6) very gravelly loam, red (2.5YR 5/6) moist; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine roots; common very fine and fine irregular pores; 45 percent gravel, 10 percent cobbles; finely disseminated calcium carbonate and discontinuous calcium carbonate casts on fragments; violently effervescent; strongly alkaline (pH 8.6); gradual wavy boundary. (combined thickness of Bk horizons - 15 to 42 cm)
R--48 to 152 cm; red limestone conglomerate of the Beaverhead formation.
TYPE LOCATION: Beaverhead County, Montana; Eli Spring topographic quadrangle. UTM 12T, 0344139e., 4997353n. NAD 83.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 3 to 5 degrees C.
Depth to a calcic horizon - 8 to 15 cm
Depth to a lithic contact - 25 to 50 cm
A horizon
Hue: 5YR, 2.5YR or 10R; dry or moist
Value: 4 to 6 dry; 3 to 5 moist
Chroma: 3 to 6; dry or moist
Clay content: 15 to 25 percent
Rock fragments: 35 to 50 percent--25 to 40 percent gravel, 0 to 10 percent cobbles
Calcium carbonate equivalent: 5 to 15 percent
Reaction: pH 7.8 to 8.4
Bk horizons
Hue: 5YR, 2.5YR or 10R; dry or moist
Value: 5 to 8 dry; 4 to 7 moist
Chroma: 3 to 8; dry or moist
Texture: sandy loam or loam
Clay content: 15 to 27 percent
Rock fragments: 35 to 65 percent--30 to 60 percent gravel, 5 to 25 percent cobbles
Calcium carbonate equivalent: 40 to 60 percent
Reaction: pH 8.0 to 8.6
COMPETING SERIES:
Tropal - does not allow for hues redder than 10YR, and does not have an O horizon
GEOGRAPHIC SETTING:
Landform - ridges, hills and mountain slopes
Elevation - 1825 to 2600 meters
Slope - 10 to 60 percent
Parent material - colluvium and residuum derived from red limestone conglomerate or other red calcareous rock types
Climate - long, cold winters; cool, moist springs; cool summers
Mean annual precipitation - 380 to 610 mm
Mean annual temperature - 3 to 6 degrees C.
Frost-free period - 50 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability.
USE AND VEGETATION: Henneberry soils are used for rangeland. Potential native vegetation is mainly Idaho Fescue, artemisia species, bluebunch wheatgrass, bitterroot, lupine and green rabbitbrush.
DISTRIBUTION AND EXTENT: Henneberry soils are of small extent in southwestern Montana. MLRA - 43B.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana.
SERIES ESTABLISHED: Horse Prairie-South Valley Area - Part of Beaverhead County, Montana, 2011; proposed in Beaverhead County, Montana, 2008.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - from 0 to 13 cm (A horizon)
Calcic horizon from 13 to 48 cm, (Bk1, Bk2 horizons)
Particle-size control section - from 25 to 48 cm (part of the Bk1, Bk2 horizons)
Lithic contact - at 48 cm (R horizon)
Henneberry soils have a cryic temperature regime and an ustic moisture regime.
National Cooperative Soil Survey
U.S.A.