IDENTIFIERS

  • Current Taxon Name (Soil Name): Yasuda
  • OSD
  • Series Extent
  • User Site ID: 14AK2903052
  • User Pedon ID: S2014AK2903052
  • Vegetation Plot ID: 14AK2903052
  • User Site Association ID: AK685_3226_DRAANJIK_ALLAK685_3226_DRAANJIK_MODALAK685_DEPRESSIONS_OTHERAK685_HZNDATA_GROUP3
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Pedon # - 15N0505
  • NCSS Pedon Lab Data NASIS Record ID - 79647
  • 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: 66.6401500
  • Std. Longitude: -144.4414088
  • 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: Fine-silty, mixed, superactive, nonacid, subgelic Typic Halaquepts
  • Current Taxon Kind: taxadjunct
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: soil survey inventory
  • Correlated Information:
  • Soil Name - Yasuda
  • PSC - 25 to 100 cm.
  • Classificaton Date - 12/11/2017
  • Classifier - J Paul
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - udic
  • Moisture Subclass - aquic
  • Sampled As Information:
  • Soil Name - 32 - Boreal grass fine silty terrace
  • Taxonomic Class - Fine-loamy, mixed, superactive Aquic Haplocryepts
  • Taxon Kind - taxon above family
  • PSC - 25 to 100 cm.
  • Classificaton Date - 12/29/2014
  • Classifier - N Roth
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - udic
  • Moisture SUBClass - aquic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: organic material over alluvium
  • Landscape: Black river valley
  • Landform: low terrace, flood-plain step
  • Slope Complexity: simple
  • Slope Shape Across: concave
  • Slope Shape Down: linear
  • Runoff: negligible
  • Drainage Class: moderately well
  • Flooding: none flooding
  • Ponding: occasional ponding for brief periods
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

  • Ecological Sites. (Click Ecological Site ID For Link to EDIT.)
    Ecological Site ID Ecological Site Name Correlation Data Classifier
    R232XY222AK Boreal Graminoid Loamy Terrace Depressions Dec 17 2019 Blaine Spellman
  • Ecological State: 1 - reference state
  • Community Phase: not assigned for PES

    • SITE OBSERVATION

  • Observation Date: 7/31/2014 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - other grass/herbaceous cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Horizon Lab Results - 1
    Horizon Top Depth Bottom Depth Sample ID Data Collector Total Clay CaCO3 Clay Total Silt Fine Silt Co. Silt Total Sand Total Sand Method VC Sand Co. Sand Med. Sand Fine Sand VF Sand VF Sand Method Texture Class - Field Lab Rubbed Fiber Unrubbed Fiber pH H2O
    cm cm % % % % % % % % % % % % %

    Oe

    A

    AC

    0

    4

    16

    4

    16

    35

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    Pedon Horizon Lab Results - 2
    Horizon Top Depth Bottom Depth Sample ID pH CaCl2 pH NaF pH Ox Delta pH LL PL PI Atter. Samp. Cond. COLE Pot. Acidity Ca + Mg - Meh 2 K Ca + Mg - Sat. Paste KCl Extract. Acidity Base Sat. - Meh 2 CEC-7 CEC-8.2
    cm cm % % % cm/cm meq/100g cmol(+)/kg cmol(+)/kg mmol(+)/l cmol(+)/kg % cmol(+)/kg cmol(+)/kg

    Oe

    A

    AC

    0

    4

    16

    4

    16

    35

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    Pedon Horizon Lab Results - 3
    Horizon Top Depth Bottom Depth Sample ID ECEC Phosphate P NO3-N EC EC Method EC 1:5 by volume CaCO3 Equiv. Equiv. Gypsum Na SAR Gypsum Req. Humic Color Fulvic Color Humic + Fulvic Color Al PI Pyro. Hue PyrO. Value Pyro. Chroma
    cm cm cmol(+)/kg mg/kg mg/kg dS/m dS/m % % mmol(+)/l % L-pcu/g L-pcu/g L-pcu/g %

    Oe

    A

    AC

    0

    4

    16

    4

    16

    35

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

    ochric epipedon

    0—18

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    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

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    Oe—0 to 4 centimeters (0.0 to 1.6 inches); very dark brown (10YR 2/2) moderately decomposed plant material; low excavation difficulty; 5.0 very fine roots throughout and 5.0 fine roots throughout; fragments; strongly alkaline, pH 8.6, pH meter.; dry when described; observed in shovel slice
    A—4 to 16 centimeters (1.6 to 6.3 inches); 90 percent dark grayish brown (2.5Y 4/2) and 5 percent dark gray (2.5Y 4/1) and 5 percent very dark gray (2.5Y 3/1) silt loam; moderate fine granular structure; moderate excavation difficulty; 5.0 very fine roots throughout and 5.0 fine roots throughout; 1 percent fine distinct irregular weakly coherent cemented yellowish brown (10YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; noneffervescent, by hcl, 1n; very strongly alkaline, pH 9.1, pH meter.; moist when described; observed in shovel slice
    AC—16 to 35 centimeters (6.3 to 13.8 inches); 95 percent light olive brown (2.5Y 5/3) and 5 percent gray (2.5Y 5/1) silt loam; moderate fine granular structure; moderate excavation difficulty; 2.0 very fine roots throughout and 5.0 fine roots throughout; 5 percent medium 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; very strongly alkaline, pH 9.2, pH meter.; moist when described; observed in shovel slice