LOCATION JESSECREEK AK
Established Series
MPS/SAS/TJR
05/2022
JESSECREEK SERIES
Landscape--valley
Landform--terraces
Slope--0 to 4 percent
Parent material--organic material over loess over sandy and gravelly alluvium
Mean annual precipitation--about 450 mm
Mean annual air temperature--about -3 degrees C
Depth class--very deep
Drainage class--poorly drained
Soil moisture regime--aquic
Soil temperature regime--gelic
Soil moisture subclass--typic
TAXONOMIC CLASS: Sandy, mixed, subgelic Fluvaquentic Gelaquepts
TYPICAL PEDON: Jessecreek muck on a slightly convex tread on a slope of 2 percent at an elevation of 156 m (The soil was wet from 0 to 70 cm and wet, satiated, from 70 to 150cm when described on June 10, 2019.)
Oa--0 to 21 cm; muck, dark gray (10YR 4/1) dry, black (10YR 2/1) moist; many very fine and common fine, medium, and coarse roots; moderately acid (pH 5.8); abrupt irregular boundary
A/Oa--21 to 40 cm; silt loam, 95 percent yellowish red (5YR 4/6) and 5 percent dark gray (10YR 4/1) dry, 95 percent dark brown (7.5YR 3/3) and 5 percent black (10YR 2/1) moist; weak medium subangular blocky structure; soft, very friable, nonsticky, nonplastic; nonsmeary; many very fine and common fine, medium, and coarse roots; few very fine irregular pores; 15 percent medium irregular yellowish red (5YR 4/6) masses of oxidized iron; moderately acid (pH 5.9); abrupt smooth boundary
Bw/A--40 to 52 cm; silt loam, 80 percent light brown (7.5YR 6/4) and 20 percent very dark brown (7.5YR 2.5/3) dry, 80 percent brown (7.5YR 4/4) and 20 percent black (10YR 2/1) moist; weak medium granular structure; soft, very friable, nonsticky, nonplastic; nonsmeary; many very fine and common fine roots; few very fine irregular pores; 10 percent medium irregular yellowish red (5YR 4/6) masses of oxidized iron; slightly acid (pH 6.1); abrupt smooth boundary
2C--52 to 150 cm; gravelly loamy sand, strong brown (7.5YR 4/6) dry, brown (7.5YR 4/4) moist; single grain; nonsticky, nonplastic; nonsmeary; 20 percent rounded gravel; slightly acid (pH 6.3)
TYPE LOCATION: Nome Census Area, Alaska latitude 63.3259290 longitude -160.6568810 degrees, datum WGS84 (Coordinates determined with a GPS unit)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature-- -2 to 0 degrees C
Soil moisture control section--saturated from a depth of 0 to 25 cm for more than two weeks during the growing season
Thickness of histic epipedon--20 to 30 cm
Depth to redoximorphic iron concentrations--20 to 30 cm
Depth to aquic conditions--0 cm
Particle Size Control Section:
*Clay--2 to 15 percent
*Total fragments--15 to 30 percent gravels
Oa horizon
Thickness--20 to 30 cm
A/Oa horizon
Hue--7.5YR or 10YR
Value--2 to 3 moist, 4 or 5 dry
Chroma-1 to 3
Fine-earth texture--silt loam
Clay--5 to 13 percent
Sand--15 to 30 percent
Organic carbon--8 to 12 percent
Reaction--4.8 to 5.9
Thickness--10 to 25 cm
Bw/A horizon
Hue--7.5YR or 10YR
Value--2 to 4 moist. 4 to 6 dry
Chroma--1 to 4
Fine-earth texture--silt loam, very fine sandy loam
Clay--5 to 10 percent
Sand--15 to 55 percent
Organic carbon--5 to 8 percent
Reaction--5.0 to 6.0
Thickness--10 to 35 cm
2C horizon
Hue--7.5YR, 10YR, or 2.5Y
Value--3 or 4 moist, 5 or 6 dry
Chroma--2 to 4
Fine-earth texture--loamy sand, sand
Clay--0 to 8 percent
Sand--75 to 100 percent
Organic carbon--0.2 to 1 percent
Total rock fragment content--15 to 30 percent gravel
Reaction--5.6 to 6.5
COMPETING SERIES: none
GEOGRAPHIC SETTING:
*Elevation--15 to 500 m
*Climate--warm, moist summers; cold, dry winters
*Mean annual precipitation--340 to 560 mm
*Mean annual air temperature-- -5 to -1 degrees C
*Frost-free period--55 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS:
*
Sprucecreek--cryic soil temperature regime, folistic epipedon, no aquic conditions, terraces in valleys
*
Nonvalnuk--cryic soil temperature regime, thickness of organic soil materials is greater than 100 cm, water table at the surface during the growing season (peraquic moisture regime), swales on terraces
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
*Drainage class--poorly drained
*Saturation during normal years--saturated from a depth of 0 to 25 cm for more than two weeks during the growing season
*Saturated hydraulic conductivity (Ksat)--high in the histic epipedon, very high in the sand substratum, moderately high throughout the rest of the profile
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--bluejoint, tealeaf willow, dwarf birch, Alaska bog willow, arctic sweet coltsfoot, scouring rush, horsetail, purple marshlocks, Bigelow's sedge, cetraria lichen, cup lichen, greygreen reindeer lichen, star reindeer lichen, black crowberry, meadow horestail, splendid feather moss, marsh Labrador tea, white spruce, Schreber's big red stem moss, polytrichum moss, knights plume moss, feltleaf willow, sphagnum, beauverd spirea, bog blueberry, lingonberry
DISTRIBUTION AND EXTENT: Yukon-Kuskokwim Highlands, Alaska; MLRA 230; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA
SERIES ESTABLISHED: Nulato Hills BLM area, Nome Census Area, Alaska; 2021
REMARKS:
Diagnostic horizons and features recognized in this pedon
*Particle-size control section--zone from 46 to 121 cm
*Histic epipedon--zone from 0 to 21 cm
*Sapric soil material--zone from 0 to 40 cm
*Redoximorphic concentrations--zone from 21 to 52 cm
*Aquic conditions--zone from 0 to 130 cm
*Lithological discontinuity--zone from 52 to 150 cm
________________________________________
National Cooperative Soil Survey
U.S.A.