LOCATION HODZANA AK
Established Series
JDP/NR/TJR
05/2022
HODZANA 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--moderately well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Coarse-loamy over sandy or sandy-skeletal, mixed, superactive, calcareous Oxyaquic Cryofluvents
TYPICAL PEDON: Hodzana silt loam on a flood plain with a slope of 1 percent and an elevation of 246 m (The soil was moist throughout when described on July 26, 2012.)
A--0 to 13 cm; silt loam; light brownish gray (2.5Y 6/2) dry, dark grayish brown (2.5Y 4/2) moist; weak fine granular structure; soft, very friable; many fine and medium roots; common fine and medium pores; violently effervescent; strongly alkaline (pH 8.5)
C1--13 to 41 cm; stratified fine sand to loamy very fine sand; light brownish gray (2.5Y 6/2) dry, dark grayish brown (2.5Y 4/2) moist; single grain; loose; many fine and medium roots, and common coarse roots; few fine and medium pores; strongly effervescent; moderately alkaline (pH 8.0)
C2--41 to 55 cm; silt loam; light gray (2.5Y 7/1) dry, gray (2.5Y 5/1) moist; massive; slightly hard, friable; many fine and medium roots; few fine and medium pores; 5 percent dark yellowish brown (10YR 4/4) moist, mottles in matrix; violently effervescent; strongly alkaline (pH 8.5)
2C3--55 to 150 cm; extremely gravelly coarse sand; light olive brown (2.5Y 5/3) dry, dark olive brown (2.5Y 3/3) moist; single grain; loose; few fine pores; 70 percent gravels, and 5 percent cobbles; slightly effervescent; slightly alkaline (pH 7.5)
TYPE LOCATION: Yukon-Koyukuk Census Area, Alaska; latitude 67.2853333 degrees, longitude -144.1521692 degrees, datum WGS84 (coordinates determined with a GPS)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--0.5 to 2.5 degrees C
Rock fragment content--35 to 85 percent gravels and cobbles (by weighted average) in the zone from 25 to 100 cm
A horizon
Hue--10YR, 2.5Y
Value--3 to 5 moist, 5 to 7 dry
Chroma--1 or 2 moist
Fine-earth texture--silt loam, very fine sandy loam
Clay content--0 to 18 percent
Reaction--7.5 to 9.0
Effervescence--slight to violent
Thickness--1 to 15 cm
C1 and C2 horizons
Value--3 to 5 moist, 5 to 7 dry
Chroma--1 or 2 moist
Fine-earth texture--silt loam, very fine sandy loam, loamy very fine sand, fine sand to coarse sand
Rock fragment content--0 to 50 percent total gravels and cobbles
Clay content--0 to 18 percent
Reaction--7.5 to 9.0
Effervescence--slight to violent
Combined thickness--20 to 50 cm
2C2 horizon (where present)
Value--3 to 5 moist, 5 to 7 dry
Chroma--1 or 2 moist
Fine-earth texture--fine sand to coarse sand
Rock fragment content--20 to 85 percent total gravels and cobbles
Clay content--0 to 5 percent
Reaction--7.5 to 9.0
Effervescence--slight to violent
Combined thickness--85 to 130 cm
2C3 horizon
Value--3 to 5 moist, 5 to 7 dry
Chroma--1 or 2 moist
Fine-earth texture--fine sand to coarse sand
Rock fragment content--20 to 85 percent total gravels and cobbles
Clay content--0 to 5 percent
Reaction--7.5 to 9.0
Effervescence--slight to violent
Combined thickness--85 to 130 cm
COMPETING SERIES:
None
GEOGRAPHIC SETTING:
Elevation--100 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:
Teedrinjik--no aquic conditions within 150 cm; higher positions on similar landforms
Jokinaugh--aquic conditions within 25 cm; depressions on similar landforms, grassland vegetation
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--moderately well drained
Saturation in normal years--water table top depth between a depth of 50 and 100 cm in May and June when flooding
Flooding--frequent and occasional, long
Ponding--none
Saturated hydraulic conductivity (Ksat)--high or very high throughout
USE AND VEGETATION:
Use--wildlife habitat, subsistence, recreation
Potential natural vegetation--balsam poplar, feltleaf willow, littletree willow, Bebb willow, prickly rose, thinleaf alder, redosier dogwood, field horsetail
DISTRIBUTION AND EXTENT: Yukon Flats Lowlands, Alaska; MLRA 232; small 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 25 to 100 cm
*Ochric epipedon
*Strongly contrasting particle size
*Lithologic discontinuity--top of 2C3 horizon
*Irregular decrease in organic carbon content--zone from 25 to 55 cm
*Aquic conditions--55 cm and below
Occasional flooding is the dominant condition for this series.
Positive reaction to alpha-alpha-dipyridyl is assumed in the 2C3 horizon.
Low chroma and values of 4 or greater in the 2C horizon are derived from parent material and are not believed to be related to aquic conditions.
National Cooperative Soil Survey
U.S.A.