LOCATION KINGSLOUGH              AK

Established Series
JDP/BB/TJR
05/2022

KINGSLOUGH SERIES

Landscape--alluvial plains
Landform--flood plains
Slope--0 to 3 percent
Parent material--alluvium
Mean annual precipitation--about 255 mm
Mean annual air temperature--about -6 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--gelic
Soil moisture subclass--typic

TAXONOMIC CLASS: Coarse-silty, mixed, superactive, calcareous, subgelic Typic Haplorthels

TYPICAL PEDON: Kingslough silt loam on a forested flood plain with a slope of 1 percent and an elevation of 125 m (The soil was moist throughout when described on August 16, 2010.)

Oe--0 to 6 cm; moderately decomposed plant material; common fine and very fine roots; slightly alkaline (pH 7.5); abrupt wavy boundary

A--6 to 9 cm; silt loam; dark gray (2.5Y 4/1) dry, black (2.5Y 2.5/1) moist; weak very fine granular structure; soft, very friable, nonsticky and nonplastic; common very fine to medium roots; common fine and medium pores; strongly effervescent; moderately alkaline (pH 8.4); clear smooth boundary

C--9 to 87 cm; silt loam; light brownish gray (2.5Y 6/2) dry, dark grayish brown (2.5Y 4/2) moist; weak medium platy structure; soft, very friable, nonsticky and nonplastic; common very fine to coarse roots; few fine and medium pores; slightly effervescent; moderately alkaline (pH 8.3); clear smooth boundary

Cf--87 to 100 cm; permanently frozen silt loam; light brownish gray (2.5Y 6/2) dry, dark grayish brown (2.5Y 4/2) moist; massive; soft, very friable, nonsticky and nonplastic; few fine pores; slightly effervescent; slightly alkaline (pH 7.8)

TYPE LOCATION: Yukon-Koyukuk Census Area, Alaska; latitude 66.6183333 degrees, longitude -145.6866667 degrees, datum WGS84 (coordinates determined with a GPS)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature-- -4 to 1 degrees C
Depth to permafrost--70 to 100 cm

Oi horizons (where present)
Thickness--5 to 12 cm
Reaction--6.0 to 8.5

Oe horizons
Thickness--5 to 12 cm
Reaction--6.0 to 8.5

A horizon
Hue--10YR, 2.5Y
Value--2 or 3 moist, 4 or 5 dry
Chroma--1 or 2 moist
Fine-earth texture--silt loam, very fine sandy loam, silt
Clay content--0 to 18 percent
Reaction--7.5 to 8.5
Effervescence--slight to strong
Thickness--1 to 15 cm

C horizon
Hue--2.5Y to 7.5YR
Value--2 to 4 moist, 4 to 6 dry
Chroma--1 to 3 moist
Fine-earth texture--silt loam, very fine sandy loam, silt
Clay content--0 to 18 percent
Reaction--7.5 to 8.5
Effervescence--slight to strong
Combined thickness--70 to 90 cm

Cf horizon
Hue--2.5Y, 10YR
Value--2 to 4 moist, 4 to 6 dry
Chroma--1 to 3 moist
Fine-earth texture--silt loam, very fine sandy loam, silt
Clay content--0 to 18 percent
Reaction--7.5 to 8.5
Effervescence--slight to strong
Thickness--50 to 80 cm

COMPETING SERIES:
None

GEOGRAPHIC SETTING:
Elevation--90 to 200 m
Climate-- short, warm summers and long, very cold winters
Mean annual precipitation--210 to 310 mm
Mean annual air temperature-- -12 to 0 degrees C
Frost-free period--45 to 97 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Jokinaugh--aquic conditions within 25 cm with frequent ponding; no permafrost; depressions on similar landforms
Theodore--aquic conditions within 100 cm; no permafrost; lower positions on similar landforms
Twin--aquic conditions within 25 cm with rare flooding; adjacent terraces

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturation in normal years--none
Flooding--occasional, brief
Ponding--none
Saturated hydraulic conductivity (Ksat)--high throughout

USE AND VEGETATION:
Use--wildlife habitat, subsistence, recreation
Potential natural vegetation--white spruce, balsam poplar, resin birch, prickly rose, squashberry, twinflower, thinleaf alder, field horsetail, tall bluebell, splendid feathermoss

DISTRIBUTION AND EXTENT: Yukon Flats Lowlands, Alaska; MLRA 232; large extent

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

SERIES ESTABLISHED: Yukon Flats National Wildlife Refuge, Yukon-Koyukuk Census Area, Alaska; 2020

REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 31 to 106 cm
*Ochric epipedon
*Permafrost--Cf horizon
Soils in this series do not meet the criteria for a mollic epipedon due to thickness.

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National Cooperative Soil Survey
U.S.A.