LOCATION TUXEDNI                 AK

Established Series
Rev. DVP/DLM
02/2022

TUXEDNI SERIES

Depth class: very deep
Drainage class: somewhat poorly drained
Parent material: ash influenced loess over loamy till
Landform: hills and till plains
Slopes: 0 to 25 percent
Mean annual precipitation: 20 to 30 inches
Mean annual temperature: 33 to 36 degrees F.

TAXONOMIC CLASS: Medial over loamy, amorphic over mixed, active Aquic Haplocryands

TYPICAL PEDON: Tuxedni silt loam - on a west facing slope of 3 at 1910 feet elevation under Lutz spruce, tall grass, and shrubs. (All colors are for moist soil)

Oe--0 to 2 inches; black (10YR 2/1) moderately decomposed plant material; many very fine and fine roots; extremely acid (pH 4.2); clear smooth boundary. (1 to 4 inches thick)

A--2 to 6 inches; very dark grayish brown (10YR 3/2) silt loam; weak fine granular structure; very friable, nonsticky and nonplastic; many very fine and fine roots; smeary; 10 percent gravel; extremely acid (pH 4.2); clear wavy boundary. (4 to 8 inches thick)

Bw--6 to 12 inches; very dark grayish brown (10YR 3/2) silt loam; moderate fine granular structure; very friable, nonsticky and nonplastic; many very fine and fine roots; smeary; 10 percent gravel; strongly acid (pH 5.2); clear wavy boundary. (6 to 10 inches thick)

BC--12 to 24 inches; olive brown (2.5Y 4/4) silt loam; moderate fine granular structure; very friable,, nonsticky and nonplastic; many fine roots; smeary; 10 percent gravel; strongly acid (pH 5.2); clear wavy boundary. (6 to 10 inches thick)

2Cg--24 to 30 inches; dark grayish brown (10YR 4/2) silt loam; moderate fine granular structure; friable, nonsticky and nonplastic; slightly smeary; 40 percent 10 mm prominent reddish brown (2.5YR 4/4 redoximorphic concentrations and 40 percent 10 mm faint light brownish gray (2.5Y 6/2) redoximorphic depletions; 10 percent gravel; moderately acid (pH 6.0); clear wavy boundary. (5 to 10 inches thick)

3C1--30 to 36 inches; dark grayish brown (2.5Y 4/2) gravelly sandy loam; massive; friable, nonsticky and nonplastic; 20 percent gravel; slightly acid (pH 6.2); clear wavy boundary. (6 to 12 inches thick)

3C2--36 to 60 inches; dark grayish brown (2.5Y 4/2) very cobbly loamy sand; single grain; loose, nonsticky and nonplastic; 30 percent gravel, 25 percent cobbles; slightly acid (pH 6.2).

TYPE LOCATION: Western Kenai Peninsula, Area Alaska; about 14 miles southeast of Clam Gulch, Alaska; about 1,400 feet east and 13,000 feet north of the SE 1/4, section 28, T. 1 S., R. 11 W.; Kenai A-4 SE 1:25,000 quad, Seward Meridian; UTM north 6659419 and UTM east 601968, zone 5.

RANGE IN CHARACTERISTICS:

Soil moisture regime: oxyaquic
Mean annual soil temperature: about 34 degrees F
Upper part of solum: dominated by amorphous material
Depth to loamy till: 20 to 30 inches

O horizon:
Matrix color: hue of 7.5YR to 2.5Y; value of 2 or 3; chroma of 1 to 3
Reaction class: extremely acid or very strongly acid

A horizon:
Matrix color: hue of 10YR or 2.5Y; value of 2 or 3; chroma of 2 or 3
Texture: silt loam, very fine sandy loam
Coarse fragments: 0 to 14 percent
Reaction class: extremely acid

Bw horizon:
Matrix color: hue of 10YR or 2.5Y; value of 3 to 5; chroma of 2 to 4
Texture: silt loam, very fine sandy loam
Coarse fragments: 0 to 14 percent
Reaction class: extremely acid

BC horizon:
Matrix color: hue of * to 10YR 0r 2.5Y; value of 4 or 5; chroma of 2 to 4
Texture: silt loam, very fine sandy loam
Coarse fragments: 0 to 14 percent
Reaction class: extremely acid

2Cg horizon:
Matrix color: hue of 2.5Y or 5Y; value of 5 or 6; chroma of 1 to 3
Redoximorphic features: hue of 2.5YR to 5Y; value of 4 to 6; chroma of 1 to 4
Texture: silt loam, loam modified by 0 to 25 percent total coarse fragments; 0 to 25 percent gravel, 0 to 5 percent cobbles
Reaction class: moderately acid or slightly acid

3C horizons:
Matrix color: hue of 2.5Y or 5Y; value of 4 to 6; chroma of 2 to 4
Texture: sandy loam, loam, loamy sand modified by 15 to 40 percent total coarse fragments; 15 to 40 percent gravel, 0 to 25 percent cobbles
Reaction class: moderately acid or slightly acid

COMPETING SERIES: There are no competing series in this classification.

GEOGRAPHIC SETTING:
Drainage class: somewhat poorly drained
Parent material: ash influenced loess over loamy till
Landform: hills and till plains
Slopes: 0 to 25 percent
Mean annual temperature: 33 to 36 degrees F.
Mean annual precipitation: 20 to 30 inches

GEOGRAPHICALLY ASSOCIATED SOILS: These include Chunilna and Whitsol soils. Chunilna soils are very poorly drained and occur on depressions. Whitsol soils are well drained and occur on hills and till plains.

DRAINAGE AND PERMEABILITY: Somewhat poorly drained, very low to medium runoff. Saturated hydraulic conductivity is moderately high to high in the solum and high in the substratum.

USE AND VEGETATION: Used for forestry, wildlife habitat, and recreation. Native vegetation is Lutz spruce, paper birch with an understory of alder, tall grass, and shrubs.

DISTRIBUTION AND EXTENT: MLRA 224 Cook Inlet Lowlands, South-central Alaska. The series is of small extent.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA

SERIES ESTABLISHED: Western Kenai Peninsula Area, Alaska, 2005

REMARKS: Diagnostic features and horizons recognized in this profile include:
Andic soil properties: from 2 to 24 inches. (A, Bw, and BC horizons)
Redoximorphic features: from 24 to 39 inches. (2Cg horizon)
Lower part of particle size control section: loamy (weighted average)
Temperature regime: cryic

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National Cooperative Soil Survey
U.S.A.