LOCATION KAVIRIUQ                AK

Established Series
Rev. MM/DLM
05/2022

KAVIRIUQ SERIES

Depth class: very deep
Drainage class: well drained
Parent material: loess
Landform: hills and mountains
Slopes: 3 to 45 percent
Mean annual precipitation: 15 to 26 inches, 393 to 657 mm
Mean annual temperature: 28 to 30 degrees F., -2 to -1 C.
Frost-free season: 95 to 135 days

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive Typic Haplocryods

TYPICAL PEDON: Kaviriuq silt loam - on a slope of 8 percent at 420 feet, 128 m elevation under boreal forest. (All colors are for moist soil)

Oe--0 to 2 inches (0-6 cm); very dark gray (5YR 3/1) moderately decomposed plant material; many very fine and fine, common medium and few coarse roots; very strongly acid; clear (pH 4.9), smooth boundary. (1 to 6 inches thick, 3 to 15 cm)

E--2 to 3 inches (6 to 8 cm); gray (5YR 6/1) silt loam; weak, medium, subangular blocky structure; very friable, nonsticky and nonplastic; common very fine and fine, common medium and few coarse roots; very strongly acid (pH 4.5); clear, smooth boundary. (1 to 5 inches thick, 3 to 13 cm)

Bs--3 to 6 inches (8 to 16 cm); dark reddish brown (5YR 3/4) and yellowish brown (10YR 5/8) silt loam; moderate, medium, subangular blocky structure; very friable, nonsticky and nonplastic; common very fine and fine and common medium roots; strongly acid (pH 5.2); clear smooth boundary. (2 to 4 inches thick, 5 to 10 cm)

Bw--6 to 15 inches (16 to 38 cm); olive brown (2.5Y 4/4) silt loam; weak, medium, granular structure; very friable, nonsticky and nonplastic; common very fine and fine and common medium roots; strongly acid (pH 5.3); gradual, smooth boundary. (4 to 10 inches thick, 10 to 25 cm)

C--15 to 60 inches (38 to 152 cm); light olive brown (2.5Y 5/3) silt loam; massive; very friable, nonsticky and nonplastic; 3 mm dark yellowish brown (10YR 4/6) high chroma redox concentrations (approximately 10 percent of horizon); 2 mm grayish brown (10YR 5/2) low chroma redox depletions (approximately 5 percent of horizon); moderately acid (pH 5.8)

TYPE LOCATION: Western Interior Area, Alaska; Stony River area, Alaska; north 6850879 and UTM east 617323, zone 4.

RANGE IN CHARACTERISTICS:

Soil moisture regime: udic
Depth to albic horizon: 1 to 6inches, 3 to 15 cm
Depth to cambic horizon: 5 to 15 inches, 11 to 38 cm
Depth to spodic horizon: 3 to 11 inches, 6 to 28 cm
Depth to redoximorphic concentrations: 15 to 60 inches, 38 to 152 cm

O horizon:
Matrix color: hue of 5YR to 10YR; value of 2 or 3; chroma of 2 or 3
Reaction class: extremely acid to strongly acid

E horizon:
Matrix color: hue of 5YR to 10YR; value of 1 or 2; chroma of 4 to 6
Texture: silt loam or very fine sandy loam
Reaction class: extremely acid to moderately acid

Bs horizon:
Matrix color: hue of 5YR or 7.5YR; value of 3 or 4; chroma of 3 or 4
Texture: silt loam or very fine sandy loam
Reaction class: extremely acid to moderately acid

Bw horizon:
Matrix color: hue of 7.5YR to 2.5Y; value of 3 or 4; chroma of 3 to 6
Texture: silt loam or very fine sandy loam
Reaction class: very strongly acid to neutral

C horizon:
Matrix color: hue of 10YR to 5Y; value of 4 to 6; chroma of 2 to 4
Redoximorphic concentrations: hue of 7.5YR to 10YR; value of 3 to 4; chroma of 4 to 6; depletions: hue of 10YR to 5Y; value of 4 or 5; chroma of 1 or 2
Texture: silt loam or very fine sandy loam
Reaction class: strongly acid to neutral

COMPETING SERIES: These These include Flat Horn, Kwatahein, Stainky, and Yohn soils. Flat Horn soils have stratified textures in the substratum. Kwatahein, Stainky, and Yohn soils have coarse fragments in the substratum.

GEOGRAPHIC SETTING:
Depth class: very deep
Drainage class: well drained
Parent material: loess
Landform: hills and lower mountain slopes
Slopes: 3 to 45 percent
Mean annual precipitation: 15 to 26 inches, 393 to 657 mm
Mean annual temperature: 28 to 30 degrees F., -2 to -1 C.
Frost-free season: 95 to 135 days

GEOGRAPHICALLY ASSOCIATED SOILS: These include Teggiuq, Nunaniq, and Sleetmut soils. Teggiuq soils are permanently frozen soils at cooler positions, Nunaniq soils are well drained soils formed in loess at lower concave and linear positions. Sleetmute soils are gravelly and occur on shoulders and noseslopes.

DRAINAGE AND PERMEABILITY: Well drained, medium runoff, saturated hydraulic conductivity is moderately high to high.

USE AND VEGETATION: Used for water shed. Native vegetation is paper birch and horsetail grass.

DISTRIBUTION AND EXTENT: MLRA 230, Yukon-Kuskokwim Highlands, Alaska. The series is of moderate extent.

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

SERIES ESTABLISHED: Western Interior Rivers Area, Alaska, 2007

REMARKS: Diagnostic features and horizons recognized in this profile include:
Albic horizon: 2 to 3 inches, 6 to 8 cm. (E horizon)
Spodic horizon: 3 to 6 inches, 8 to 16 cm. (Bs horizon)
Cambic horizon: 6 to 15 inches, 16 to 38 cm. (Bw horizon)
Coarse-loamy, particle-size control section: 10 to 40 inches, 25 to 100 cm, below the O horizon
Temperature regime: cryic
Moisture regime: Udic

ADDITIONAL DATA:

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National Cooperative Soil Survey
U.S.A.