LOCATION YANERT AK
Established Series
JDP/DJM/TJR
02/2022
YANERT SERIES
Landscape--alluvial plains
Landform--swales on stream terraces
Slope--0 to 2 percent
Parent material--alluvium
Mean annual precipitation--about 255 mm
Mean annual air temperature--about -6 degrees C
Depth class--very deep
Drainage class--very poorly drained
Soil moisture regime--aquic
Soil temperature regime--gelic
Soil moisture subclass--typic
TAXONOMIC CLASS: Coarse-silty, mixed, superactive, calcareous, subgelic Typic Aquiturbels
TYPICAL PEDON: Yanert silt loam on a scrubland swale with a slope of 0 percent and an elevation of 105 m (The soil was wet throughout when described on August 26, 2015.)
Oe--0 to 7 cm; mucky peat; common very fine, fine, and medium roots; neutral (pH 7.0)
A--7 to 10 cm; silt loam; gray (2.5Y 5/1) dry, very dark gray (2.5Y 3/1) moist; weak, coarse subangular blocky structure; slightly hard, friable; common very fine, fine, and medium roots; common fine and medium pores; slightly effervescent; slightly alkaline (pH 7.5)
Cg1--10 to 25 cm; silt loam; light gray (2.5Y 7/2) dry, grayish brown (2.5Y 5/2) moist; massive; slightly hard, friable; common very fine and fine roots; few fine and medium pores; 20 percent grayish brown (2.5Y 5/2) moist, iron depletions in matrix; slightly effervescent; slightly alkaline (pH 7.5)
Cg2--25 to 70 cm; silt loam; light gray (2.5Y 7/2) dry, grayish brown (2.5Y 5/2) moist; massive; slightly hard, friable; few fine pores; 15 percent irregular grayish brown (2.5Y 5/2) moist, iron depletions in matrix; slightly effervescent; slightly alkaline (pH 7.5)
Cjjgf--70 to 100 cm; permanently frozen silt loam; light gray (2.5Y 7/2) dry, grayish brown (2.5Y 5/2) moist; massive; slightly hard, friable; 20 percent grayish brown (2.5Y 5/2) moist, iron depletions in matrix; slightly effervescent; slightly alkaline (pH 7.5)
TYPE LOCATION: Yukon-Koyukuk Census Area, Alaska; latitude 66.3091700 degrees, longitude -148.1386700 degrees, datum WGS84 (coordinates determined with a GPS)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature-- -4 to 1 degrees C
Depth to permafrost--50 to 90 cm
Depth to redoximorphic features--0 to 25 cm
Other features--cryoturbation within 150 cm
Oe horizon
Thickness--5 to 15 cm
Reaction--6.0 to 8.0
Oa horizon (where present)
Thickness--5 to 15 cm
Reaction--6.0 to 8.0
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--6.0 to 8.0
Effervescence--none to strong
Thickness--1 to 10 cm
AC horizon (where present)
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--6.0 to 8.0
Effervescence--none to strong
Thickness--1 to 10 cm
Cg1, Cg2, and Cgjjf horizons
Value--3 to 5 moist, 5 to 7 dry
Chroma--1 or 2 moist
Fine-earth texture--silt loam, very fine sandy loam, silt
Clay content--0 to 18 percent
Reaction--6.0 to 8.0
Effervescence--none to strong
Combined thickness--125 to 145 cm
Cgf horizon (where present)
Value--3 to 5 moist, 5 to 7 dry
Chroma--1 or 2 moist
Fine-earth texture--silt loam, very fine sandy loam, silt
Clay content--0 to 18 percent
Reaction--6.0 to 8.0
Effervescence--none to strong
Thickness--125 to 145 cm
COMPETING SERIES:
Browne--noncalcareous; reaction does not range above neutral in any horizon
Chatanika--noncalcareous; reaction does not range above neutral in any horizon
GEOGRAPHIC SETTING:
Elevation--90 to 300 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:
Tlozhavun--no aquic conditions within 150 cm; higher positions on similar landforms
Tajittro--aquic conditions within 100 cm; higher positions on similar landforms
Nuntragut--aquic conditions within 100 cm; higher positions on similar landforms
Gushdoiman--aquic conditions within 25 cm; adjacent depressions on similar landforms
Twin--aquic conditions within 25 cm with rare flooding; higher positions on similar landforms
Sussaymin--aquic conditions within 25 cm; adjacent bogs on similar landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--very poorly drained
Saturation in normal years--water table top depth between a depth of 0 to 25 cm in May and June, and saturated below a depth of 25 cm throughout the rest of the year
Flooding--none
Ponding--frequent, very long
Saturated hydraulic conductivity (Ksat)--high throughout
USE AND VEGETATION:
Use--wildlife habitat, subsistence, recreation
Potential natural vegetation--white spruce, scrub birch, tealeaf willow, grayleaf willow, littletree willow, shrubby cinquefoil, water sedge, Bigelow's sedge, tussock cottongrass, bluejoint, slimstem reedgrass
DISTRIBUTION AND EXTENT: Yukon Flats Lowlands, Alaska; MLRA 232; moderate 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 32 to 107 cm
*Ochric epipedon
*Redoximorphic iron depletions with chroma of 2 or less--Cg1, Cg2, and Cgjjf horizons
*Reduced matrix--Cg1, Cg2, and Cgjjf horizons
*Aquic conditions--Cg1, Cg2, and Cgjjf horizons
*Permafrost--Cgjjf horizon
*Cryoturbation--Cgjjf horizon
All horizons within 25 cm of the mineral soil surface must effervesce to meet the calcareous class.
National Cooperative Soil Survey
U.S.A.