LOCATION ODNE WAEstablished Series
TAXONOMIC CLASS: Fine-silty, isotic, mesic Aquandic Epiaqualfs
TYPICAL PEDON: Odne silt loam, pasture. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 5 inches; dark gray (10YR 4/1) heavy silt loam, grayish brown (10YR 5/2) when dry; few fine distinct dark reddish brown (5YR 3/4) mottles, strong brown (7.5YR 5/6) when dry; moderate fine granular structure; slightly hard, friable, sticky, plastic; abundant fine fibrous roots; common very fine reddish brown concretions; moderately acid; abrupt smooth boundary. (4 to 6 inches thick)
A3--5 to 10 inches; dark gray (10YR 4/1) silty clay loam, light brownish gray (10YR 6/2) when dry; many medium prominent dark reddish brown (5YR 2/2) mottles; dark reddish brown (5YR 3/4) when dry; moderate very fine subangular blocky structure; hard, friable, sticky, plastic; abundant fine fibrous roots; many fine pores; common very fine dark reddish brown concretions; moderately acid; clear wavy boundary. (4 to 6 inches thick)
B1g--10 to 19 inches; gray (5Y 5/1) silt loam, light gray (5Y 6/1) when dry; many fine prominent yellowish red (5YR 4/8) mottles, reddish yellow (5YR 6/8) when dry; weak very fine subangular blocky structure; very hard, firm, sticky, plastic; plentiful fine fibrous roots; many fine pores; thin nearly continuous clay films in pores and on ped surfaces; common black manganese concretions; moderately acid; clear wavy boundary. (8 to 12 inches thick)
B21gt--19 to 27 inches; dark gray (5Y 4/1) silty clay loam, light gray (5Y 6/1) when dry; common medium distinct reddish brown (5YR 4/4) mottles, yellowish red (5YR 5/6) when dry; moderate medium prismatic breaking to moderate fine angular blocky structure; extremely hard, very firm, very sticky, very plastic; few fine fibrous roots; common fine tubular and interstitial pores; common black manganese concretions; thick continuous clay films on ped surfaces and in pores; slightly acid; clear wavy boundary. (8 to 10 inches thick)
B22gt--27 to 33 inches; dark gray (5Y 4/1) clay loam, light olive gray (5Y 6/2) when dry; common fine distinct dark reddish brown (5YR 3/4) mottles, yellowish red (5YR 4/6) when dry; moderate medium prismatic breaking to moderate medium angular blocky structure; extremely hard, firm, sticky, plastic; few fine roots in upper part and no roots in lower part of horizon; few fine pores; few fine black manganese concretions; moderate continuous clay films in pores and on horizontal and vertical surfaces; common fine mica flakes; slightly acid; gradual wavy boundary. (5 to 9 inches thick)
B3g--33 to 60 inches; dark gray (5Y 4/1) loam, light olive gray (5Y 6/2) when dry; many medium prominent dark reddish brown (5YR 3/4) mottles, yellowish red (5YR 4/6) when dry; moderate medium prismatic structure; extremely hard, very firm, slightly sticky, slightly plastic; common medium tubular pores; thick continuous clay films on prism faces; tongues, 0.5 to 0.75 inches thick of gray (5Y 5/1) silty clay loam, light gray (5Y 7/1) when dry, occur between the prisms; neutral. (16 to 40 inches thick)
TYPE LOCATION: On the Archambault Road approximately 700 feet east and 125 feet south of the NW corner of section 23, T.4N., R.1E., Clark County, Washington.
RANGE IN CHARACTERISTICS: The mean annual soil temperature at 20 inches ranges from 47 to 59 degrees F. Solum thickness ranges from 45 to 80 inches.
The A horizons range in moist chroma from 1 to 2, in moist value from 4 to 5, in 10YR and 2.5Y hues, texture ranges from silt loam to silty clay loam, and reaction ranges from moderately acid to strongly acid.
The Blg horizons range in moist chroma from 1 to 2, in moist value from 4 to 5, in 10YR to 5Y hues, texture ranges from silt loam to silty clay loam, and reaction ranges from moderately to strongly acid.
Texture of the B2gt horizons is dominantly silty clay loam, but in places it is heavy silt loam or clay loam. Moist hue of the B2gt horizons range from 10YR to 5Y, moist value ranges from 4 or 5 and moist chroma ranges from 1 to 2. Clay films in the B2gt horizons range from medium continuous to thick continuous on peds and in pores. Reaction of the B2gt horizons range from moderately acid to slightly acid.
The B3g horizons range in moist chroma from 1 to 2, in moist value from 4 to 5, in hues of 10YR to 5Y, texture ranges from loam or clay loam to silt loam or silty clay loam, and reaction ranges from moderately acid to neutral. The B2gt horizons tongue into the B3g horizons in most pedons.
COMPETING SERIES: These are the Blanchester, Cobbsfork, Hoosierville, Moniteau, Peoga, Racoon, Sebring, and Whitson series. All of these soils are more than 30 degrees different between mean July and mean January temperature. Racoon soils have an albic horizon in addition.
GEOGRAPHIC SETTING: Odne soils occur in terrace drainageways and basins at elevations of 100 to 500 feet. The regolith consists of mixed alluvium containing some ash. Odne soils occur in a mild marine climate having an annual precipitation of 40 to 60 inches with relatively cool, dry summers and mild, wet winters. The average January temperature is 37 degrees F.; the average July temperature is 64 degrees F.; and the mean temperature is 50.degrees F. The average growing season is about 200 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the Felida, Gee, Powell, and Sara soils. Felida and Gee soils are well drained and moderately well drained. Powell soils have a fragipan. Sara soils have more than 35 percent clay in the argillic horizon.
DRAINAGE AND PERMEABILITY: Poorly drained; surface runoff is very slow. Permeability is moderate in the A and very slow in the B.
USE AND VEGETATION: Mostly pasture; hay and small grain in drained areas. Native vegetation is cedar, ash, alder, vine maple, hardhack, sedge and water tolerant grasses.
DISTRIBUTION AND EXTENT: Southwestern Washington and northwestern Oregon. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Clark County, Washington, 1967.
REMARKS: Classification only changed 4/94 because of recent amendments to Soil Taxonomy.