LOCATION LONGMARE                AK

Established Series
Rev. MJM/DLM
05/2022

LONGMARE SERIES

Depth class: very deep
Drainage class: somewhat poorly drained
Parent material: ash influenced loess over sandy and gravelly glaciofluvial deposits
Landform: outwash plains and moraines
Slopes: 0 to 8 percent
Mean annual precipitation: 15 to 35 inches
Mean annual temperature: 33 to 35 degrees F.

TAXONOMIC CLASS: Medial over sandy or sandy-skeletal, amorphic over mixed Aquandic Haplocryods

TYPICAL PEDON: Longmare - on a slope of 5 percent under spruce forest at 75 feet elevation. (All colors are for moist soil unless noted)

Oe--0 to 3 inches (0 to 8 cm); very dark grayish brown (10YR 3/2) moderately decomposed plant material many very fine, fine, medium, and coarse roots; extremely acid (pH 4.2); abrupt wavy boundary. (2 to 5 inches thick, 4 to 10 cm)

E--3 to 5 inches (8 to 14 cm); dark grayish brown (10YR 4/2) silt loam; weak fine granular structure; very friable, nonsticky and nonplastic; many very fine, fine, medium, and coarse roots; very smeary; extremely acid (pH 4.2); wavy boundary. (1 to 3 inches thick, 2 to 7 cm)

Bs--5 to 15 inches (14 to 30 cm); very dark brown (7.5YR 2.5/3) silt loam; medium fine granular structure; very friable, nonsticky and nonplastic; many very fine, fine, medium, and coarse roots; very smeary; strongly acid (pH 5.2); gradual wavy boundary. (1 to 7 inches thick, 3 to 17 cm)

Bw--15 to 18 inches (30 to 45 cm); dark yellowish brown (10YR 4/4) silt loam; medium fine granular structure; very friable, nonsticky and nonplastic; few very fine, fine, medium, and coarse roots; very smeary; strongly acid (pH 5.5); abrupt wavy boundary. (4 to 12 inches thick, 10 to 30 cm)

BC--18 to 24 inches (10 to 45 cm); olive (5Y 5/3) silt loam; weak fine angular blocky structure; friable, nonsticky and nonplastic; nonsmeary; strongly acid (pH 5.5); abrupt irregular boundary. (4 to 16 inches thick, 10 to 40 cm)

C--24 to 29 inches (60 to 73 cm); dark gray (2.5Y 4/1) silt loam; massive; friable, nonsticky and nonplastic; nonsmeary; 20 percent 5 mm prominent brown (7.5YR 4/4) redoximorphic concentrations; strongly acid (pH 5.5); clear wavy boundary. (2 to 6 inches thick, 5 to 15 cm)

2C1--29 to 32 inches (73 to 80 cm); dark gray (2.5Y 4/1) loamy sand; single grain; very friable, nonsticky and nonplastic; nonsmeary; 50 percent 10 mm prominent brown (7.5YR 4/4) redoximorphic concentrations; 20 percent 5 mm faint gray (2.5Y 5/1) redoximorphic depletions; strongly acid (pH 5.5); clear wavy boundary. (2 to 4 inches thick, 5 to 10 cm)

2C2--32 to 60 inches (80 to 152 cm); dark gray (2.5Y 4/1) sand; single grain; loose, nonsticky and nonplastic; nonsmeary; 50 percent 10 mm prominent brown (7.5YR 4/4) redoximorphic concentrations; 20 percent 5 mm faint gray (2.5Y 5/1) redoximorphic depletions; 10 percent gravel; moderately acid (pH 5.8); * boundary.
TYPE LOCATION: Western Kenai Peninsula Area, Alaska; about 1 mile NW of Kenai; in the NE 1/4 of the NE 1/4, section 36, T. 6 N., R. 12 W; Kenai C-4 SE 1:25,00 quad; Steward Meridian; UTM north 6716395 and UTM east 593712, zone 5.

RANGE IN CHARACTERISTICS:

Particle-size control (section weighted average):
Percent clay in the control section: 2 to 5 percent
Total coarse fragments in the lower part of the control section: 0 to 30 percent

Soil moisture regime: udic
Mean annual soil temperature: 35 degrees F.
Texture of the eolian mantle: silt loam or very fine sandy loam
Texture of the glaciofluvial layer: loamy sand, sandy loam or sandy modified by 0 to 30 percent total coarse fragments; 0 to 30 percent gravel, 0 to 10 percent cobbles, or stratified gravelly sand to silt loam; weighted average of coarser than loamy fine sand
Thickness of ash influenced material: 15 to 35 inches
Thickness of solum 15 to 25 inches

O horizon:
Matrix color: hue of 7.5YR or 10YR; value of 2 to 4; chroma of 2 to 4
Reaction class: extremely acid or very strongly acid

E horizon:
Matrix color: hue of 10YR or 2.5Y; value of 3 or 4; chroma of 2 to 4
Texture: silt loam, very fine sandy loam
Reaction class: very strongly acid or strongly acid

Bs horizon:
Matrix color: value of 2.5 to 4; chroma of 3 or 4
Texture: silt loam, very fine sandy loam
Total carbon: less than 6 percent
Reaction class: very strongly acid or strongly acid

Bw horizon:
Matrix color: value of 3 or 4; chroma of 3 or 4
Texture: silt loam, very fine sandy loam
Reaction class: very strongly acid or strongly acid

BC horizon:
Matrix color: hue of 2.5Y or 5Y; value of 3 to 5; chroma of 1 to 3
Texture: silt loam, very fine sandy loam, fine sandy loam
Reaction class: very strongly acid or strongly acid

C horizon:
Matrix color: value of 3 or 4; chroma of 1 or 2
Redoximorphic concentrations: hue of 7.5YR or 10YR; value of 3 or 4; chroma of 4 or 5
Texture: silt loam, very fine sandy loam, fine sandy loam
Reaction class: strongly acid or moderately acid

2C horizons:
Matrix color: hue of 2.5Y or 5Y; value of 3 to 5; chroma of 1 to 3
Redoximorphic concentrations: value of 4 or 5; chroma of 4 to 6
Redoximorphic depletions: value of 4 or 5; chroma of 1 or 2
Texture: loamy sand, sandy loam, sand modified by 0 to 30 percent total coarse fragments; 0 to 30 percent gravel, 0 to 10percent cobbles
Reaction class: strongly acid to slightly acid

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING:
Drainage class: somewhat poorly drained
Parent material: ash influenced loess over sandy and gravelly glaciofluvial deposits
Landform: outwash plains and moraines
Slopes: 0 to 8 percent
Mean annual temperature: 33 to 35 degrees F.
Mean annual precipitation: 15 to 35 inches

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Kalifonsky, Kichatna, Nikolai, Soldotna, and Starichkof soils. Kalifonsky, Nikolai, and Starichkof soils are very poorly drained soils that occur on depressions. Kichatna and Soldotna soils are well drained and occur on moraines.

DRAINAGE AND PERMEABILITY: Somewhat poorly drained, low to medium runoff, saturated hydraulic conductivity is high in the ash influenced material and high to very high in the glaciofluvial material.

USE AND VEGETATION: Used for forestry, wildlife habitat, and recreation. The native vegetation is mixed spruce, paper birch, bluejoint grass, ferns, and horsetails.

DISTRIBUTION AND EXTENT: MLRA 224 Cook Inlet Lowland, 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:
Albic horizon: 0 to 3 inches, 0 to 8 cm
Spodic horizon: 5 to 12 inches, 14 to 30 cm
Redoximorphic features: 24 to 50 inches, 60 to 152 cm
Temperature regime: cryic
Moisture regime: udic

ADDITIONAL DATA: This soil was originally described as a Coarse-loamy over sandy or sandy-skeletal, mixed, superactive Duric Cryaquods

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National Cooperative Soil Survey
U.S.A.