IDENTIFIERS

  • Current Taxon Name (Soil Name): Choonjik
  • OSD
  • Series Extent
  • User Site ID: S2014AK290001
  • User Pedon ID: S2014AK290001
  • Vegetation Plot ID: S2014AK290001
  • User Site Association ID: AK685_3242_CHOONJIK_ALLAK685_3242_CHOONJIK_MODALAK685_TERRACES_LOESS_COLO_ALLAK685_F232XY221AK_RPCmodalAK685_ALL_TYPICAL_PEDONSAK685_HZNDATA_GROUP1AK685_HZNDATA_GROUP2AK685_HZNDATA_GROUP8AK685_TREE-DATA-ENTRY
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Pedon # - 15N0497
  • NCSS Pedon Lab Data NASIS Record ID - 79639
  • Print Date: 12/6/2025

    • LOCATION

  • Location In Web Soil Survey
  • AOI is roughly a square mile and pedon is marked in the center.
  • Location in SoilWeb
  • Location in Google Maps
  • Std. Latitude: 66.6997340
  • Std. Longitude: -143.8293890
  • Datum: WGS84
  • State: Alaska
  • County: AK290—Yukon-Koyukuk Census Area
  • MLRA: 232—Yukon Flats Lowlands
  • Non-MLRA Soil Survey Area: AK685—Yukon Flats Area, Alaska

    • PEDON

  • Describers Name: Nathan Roth, Blaine Spellman
  • Current Taxonomic Class: Coarse-silty, mixed, superactive Typic Calcicryepts
  • Current Taxon Kind: series
  • Pedon Type: representative pedon for component
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: NASIS
  • Correlated Information:
  • Soil Name - Choonjik
  • PSC - 29 to 104 cm.
  • Classificaton Date - 4/14/2017
  • Classifier - J Paul
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - udic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - 32 - Boreal forest silty-calcic terraces, frozen
  • Taxonomic Class - Coarse-loamy, mixed, superactive, calcareous, subgelic Typic Haplorthels
  • Taxon Kind - family
  • Classificaton Date - 12/29/2014
  • Classifier - N Roth
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - udic
  • Moisture SUBClass - typic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: organic material over coarse-silty alluvium
  • Landscape: alluvial plain
  • Landform: stream terrace
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 7/29/2014 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - conifers
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    2FORB

    2MOSS

    ARAL5

    BRINP5

    CAPU

    CAREX

    CHAN9

    CLADO3

    CLAM60

    CLRA60

    CNCN

    FLCU

    GABO2

    GELI2

    HYSP70

    LIBO3

    MEPA

    ORSE

    PEAP60

    PIGL

    PIGL

    PIGL

    POTR5

    POTR5

    PTCI

    PUPA5

    ROAC

    SACA14

    SAGL

    SHCA

    —

    —

    Artemisia alaskana

    Bromus inermis ssp. pumpellianus var. pumpellianus

    Calamagrostis purpurascens

    Carex

    Chamerion angustifolium

    Cladonia

    Cladonia amaurocraea

    Cladina rangiferina

    Cnidium cnidiifolium

    Flavocetraria cucullata

    Galium boreale

    Geocaulon lividum

    Hylocomium splendens

    Linnaea borealis

    Mertensia paniculata

    Orthilia secunda

    Peltigera aphthosa

    Picea glauca

    Picea glauca

    Picea glauca

    Populus tremuloides

    Populus tremuloides

    Ptilidium ciliare

    Pulsatilla patens

    Rosa acicularis

    Sanguisorba canadensis

    Salix glauca

    Shepherdia canadensis

    Forb (herbaceous, not grass nor grasslike)

    Moss

    Alaska wormwood

    Pumpelly's brome

    purple reedgrass

    sedge

    fireweed

    cup lichen

    cup lichen

    greygreen reindeer lichen

    Jakutsk snowparsley

    —

    northern bedstraw

    false toadflax

    splendid feather moss

    twinflower

    tall bluebells

    sidebells wintergreen

    felt lichen

    white spruce

    white spruce

    white spruce

    quaking aspen

    quaking aspen

    —

    eastern pasqueflower

    prickly rose

    Canadian burnet

    grayleaf willow

    russet buffaloberry

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    12

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    3

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    2

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    3

    50

    5

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    2

    5

    40

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    8

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    1

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    5

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    Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    calcic horizon

    permafrost

    0—14

    22—78

    110—

    —-

    —-

    —-
    Setting and Climate
    Slope Slope Length USLE Upslope Length Elev. Corr. Elev Aspect MAP REAP FFD MAAT MSAT MWAT MAST MSST MWST MFFP PE Index Climate Station ID Climate Station Name Climate Station Type
    % m degrees mm mm C mm

    1

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    164

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    Oe—0 to 4 centimeters (0.0 to 1.6 inches); black (10YR 2/1) moderately decomposed plant material; low excavation difficulty; 3.0 fine roots throughout and 1.0 coarse roots throughout; fragments; noneffervescent, by hcl, 1n; strongly acid, pH 5.3, pH meter; abrupt wavy boundary.; moderately moist when described; observed in pit, small
    A—4 to 14 centimeters (1.6 to 5.5 inches); 90 percent brown (10YR 5/3) and 10 percent pale brown (10YR 6/3) silt loam; 18 percent sand; 66 percent silt; 16 percent clay; weak fine granular structure; low excavation difficulty; 5.0 medium roots throughout and 5.0 fine roots throughout and 1.0 coarse roots throughout; 2 percent fine distinct irregular weakly coherent cemented yellowish brown (10YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n; slightly alkaline, pH 7.5, pH meter; clear wavy boundary.; moderately moist when described; observed in pit, small
    Bw—14 to 22 centimeters (5.5 to 8.7 inches); dark yellowish brown (10YR 4/4) silt loam; 16 percent sand; 68 percent silt; 16 percent clay; weak medium subangular blocky parts to weak thin platy structure; low excavation difficulty; 5.0 medium roots throughout and 2.0 fine roots throughout and 1.0 coarse roots throughout; fragments; slight effervescence, by hcl, 1n; slightly alkaline, pH 7.5, pH meter; clear wavy boundary.; moderately moist when described; observed in pit, small
    Bkn1—22 to 40 centimeters (8.7 to 15.7 inches); 90 percent grayish brown (10YR 5/2) and 10 percent dark grayish brown (10YR 4/2) silt loam; 16 percent sand; 68 percent silt; 16 percent clay; weak fine granular structure; low excavation difficulty; 2.0 medium roots throughout and 5.0 fine roots throughout; 1 percent fine faint weakly coherent cemented gray (10YR 6/1), moist, carbonate, finely disseminated with clear boundaries in matrix; fragments; violent effervescence, by hcl, 1n; strongly alkaline, pH 8.7, pH meter; clear smooth boundary.; moderately moist when described; observed in pit, small
    Bkn2—40 to 78 centimeters (15.7 to 30.7 inches); grayish brown (2.5Y 5/2) silt loam; 16 percent sand; 68 percent silt; 16 percent clay; moderate thin platy structure; low excavation difficulty; 1.0 fine roots throughout; 3 percent fine faint weakly coherent cemented gray (10YR 6/1), moist, carbonate masses with clear boundaries in matrix; fragments; violent effervescence, by hcl, 1n; very strongly alkaline, pH 9.4, pH meter; clear smooth boundary.; moderately moist when described; observed in pit, small
    C—78 to 110 centimeters (30.7 to 43.3 inches); grayish brown (2.5Y 5/2) silt loam; 20 percent sand; 69 percent silt; 11 percent clay; weak thin platy structure; low excavation difficulty; 1.0 fine roots throughout; fragments; violent effervescence, by hcl, 1n; strongly alkaline, pH 8.9, pH meter; clear smooth boundary.; moderately moist when described; observed in pit, small
    Cf—110 to 150 centimeters (43.3 to 59.1 inches); 50 percent grayish brown (2.5Y 5/2) and 50 percent dark grayish brown (2.5Y 4/2) permanently frozen silt loam; 20 percent sand; 69 percent silt; 11 percent clay; high excavation difficulty; 1.0 fine roots throughout; fragments; slight effervescence, by hcl, 1n; strongly alkaline, pH 8.9, pH meter.; moderately moist when described; observed in pit, small