LOCATION BRODY                   ID

Established Series
Rev. LMR/CLM/KLS
08/2022

BRODY SERIES

The Brody series consists of moderately deep, well drained soils that formed in loess including volcanic ash and in residuum and colluvium from extrusive igneous rocks. Brody soils are on mountains and have slopes of 7 to 90 percent. Permeability is moderate. The average annual precipitation is about 860 mm and the average annual air temperature is about 4 degrees C.

TAXONOMIC CLASS: Ashy-skeletal, mixed Typic Vitricryands

TYPICAL PEDON: Brody cobbly silt loam - forested (Colors are for dry soil unless otherwise noted).

Oi--0 to 2 cm; undecomposed needles, leaves, cones, and twigs; very strongly acid (pH 4.5); abrupt broken boundary. (0 to 3 cm thick)

Oe--2 to 5 cm; very dark brown (10YR 2/2) partially decomposed needles, leaves, cones, and wood; extremely acid (pH 4.4); abrupt broken boundary. (0 to 5 cm thick)

Oa--5 to 6 cm; very dark brown (10YR 2/2) well-decomposed organic matter; strongly acid (pH 5.2 ); abrupt wavy boundary. (0 to 2 cm thick)

Bs1--6 to 14 cm; brown (7.5YR 5/4) cobbly silt loam, dark brown (7.5YR 3/3) moist; moderate very fine and fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many fine and medium roots; many very fine irregular pores; about 20 percent cobbles and gravel; moderately acid (pH 5.9); gradual wavy boundary. (0 to 13 cm thick)

Bs2--14 to 39 cm; brown (7.5YR 5/4) cobbly silt loam, brown (7.5YR 4/3) moist; weak very fine and fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many fine and medium roots; many very fine irregular pores; about 15 percent cobbles and gravel; slightly acid (pH 6.2); clear wavy boundary. (20 to 38 cm thick)

Bs3--39 to 82 cm; brown (7.5YR 5/4) extremely gravelly silt loam, dark brown (7.5YR 3/4) moist; weak medium subangular blocky structure that parts to weak very fine and fine granular; slightly hard, very friable, slightly sticky and slightly plastic; common fine and medium roots; many very fine tubular pores; about 75 percent basalt fragments, mostly angular gravel and cobbles; moderately acid (pH 6 .1); gradual irregular boundary. (13 to 50 cm thick)

R--82 cm; basalt bedrock. Fractured in upper part.

TYPE LOCATION: Idaho County, Idaho; eastward on Lolo Creek Road about 485 meters past Cedar Creek Road, then right about 805 meters to pit on right of road; NE 1/4 SW 1/4 sec. 7, T.34N., R.6E.

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--3 to 7 degrees C
Mean summer soil temperature--7 to 8 degrees C
Thickness of O horizon volcanic ash mantle--36 to 100 cm
Volcanic glass content in the 0.02 to 2.0 mm fraction--30 to 50 percent
Acid-oxalate extractable Al, plus 1/2 Fe--1.5 to 3.0 percent
Phosphate retention--25 to 50 percent
15-bar water retention on air dry samples--9 to 12 percent
Moist bulk density--0.85 to 1.00 g/cc
Lithic contact--50 to 100 cm
Total rock fragment content--50 to 80 percent
A faint or thin A or E horizon is present in some pedons.

Bs horizons
Hue--10YR, 7.5YR or 5YR
Chroma--dominant 3 or 4, range to 5 or 6
Texture--upper part: silt loam, loam, sandy loam
Base saturation--30 to 60 percent
Rock fragment content--15 to 35 percent in upper part; 35 to 90 percent in lower part

COMPETING SERIES: These are the Goatrock (T), Joebaldy (T), and Longjohn (T) series. Goatrock and Longjohn soils are very deep. Joebaldy soils are moderately deep to fragmental material.

GEOGRAPHIC SETTING:
Landform--mountains
Elevation--640 to 1825 meters
Slope--20 to 90 percent
Parent material--loess including volcanic ash; residuum and colluvium weathered from Columbia River basalt; or andesite or greenstone from the Seven Devils volcanoes
Average annual precipitation--710 to 1000 mm, including 1.5 to 3 meters of snow
Average annual temperature--2 to 6 degrees C
Frost-free season--less than 90 days

GEOGRAPHICALLY ASSOCIATED SOILS: None listed

DRAINAGE AND PERMEABILITY: Well drained; moderate permeability

USE AND VEGETATION: Used for timber production, recreation, wildlife habitat, and watershed. Vegetation is mainly western redcedar, western white pine, grand fir, western larch, Douglas fir, and Pacific yew with an understory of dogwood, lambstongue, huckleberry, Prince's pine, Paxistima, and twinflower.

DISTRIBUTION AND EXTENT: Brody soils are moderately extensive in north central Idaho and the surrounding regions; MLRAs 43B and 43C

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana

SERIES ESTABLISHED: Idaho County, Idaho, 1973

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon--6 to 39 cm (Bs1 and Bs2 horizons)
Cambic horizon--39 to 82 cm (Bs3 horizon)
Lithic contact--82 cm (R horizon)

The classification was changed from Loamy-skeletal, mixed Andic Cryochrepts to Ashy-skeletal Typic Vitricryands. 03/1992

Converted to metric, updated formatting, and O horizons were updated to start at zero. 8/2022

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National Cooperative Soil Survey
U.S.A.