IDENTIFIERS

Current Taxon Name (Soil Name): Jokinaugh

User Site ID: S2012AK290005

User Pedon ID: S2012AK290005

Vegetation Plot ID: S2012AK290005

User Site Association ID: AK685_3206_JOKINAUGH_ALLAK685_3206_JOKINAUGH_MODALAK685_DEPRESSIONS_COLOAK685_R232XY205AK_RPCmodalAK685_HZNDATA_GROUP4AK685_HZNDATA_GROUP7

Lab Information:

Certified Lab Pedon Description - yes

Lab Source ID - SSL

Lab Pedon # - 13N19004

NCSS Pedon Lab Data NASIS Record ID - 73148

Print Date: 11/25/2024

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: 66.5131810

Std. Longitude: -146.4175325

Datum: WGS84

Township: 20N

Range: 6E

Section: 35

PLSS Details: SW1/4

Location Description: This site is located approximately 1300ft east and 1550ft north of the southwest corner of Section 35, T.20N, R.6E; Fairbanks, Meridian.

State: Alaska

County: AK290—Yukon-Koyukuk Census Area

MLRA: 232—Yukon Flats Lowlands

Non-MLRA Soil Survey Area: AK685—Yukon Flats Area, Alaska

7.5 Minute USGS Quad: 66146-E1—Fort Yukon C-5, Alaska

PEDON

Describers Name: Nathan Roth, Shawn Nield, Jason Bladow, Ryan Maroney

Current Taxonomic Class: Coarse-silty, mixed, superactive, nonacid Typic Cryaquents

Current Taxon Kind: taxadjunct

Pedon Type: representative pedon for component

Pedon Purpose: laboratory sampling site

Correlated Information:

Soil Name - Jokinaugh

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 - Flood Plain Boreal Grasslands

Taxonomic Class - Fine-loamy, mixed, superactive Fluvaquentic Haplocryolls

Taxon Kind - taxon above family

Classificaton Date - 10/29/2012

Classifier - N Roth

Soil Taxonomic Edition - eleventh edition

Moisture Class - udic

Moisture SUBClass - aquic

Dynamic Soil Properties:

Erosion Class - 0

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: sapric organic material over fine-loamy alluvium

Landscape: Yukon river valley

Landform: flood plain

Microfeature: channel

Slope Complexity: simple

Slope Shape Across: concave

Slope Shape Down: linear

Runoff: negligible

Drainage Class: poorly

Flooding: rare flooding for brief periods

Ponding: occasional ponding for brief periods

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 8/15/2012 (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

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
2MOSS ACSI AGSC5 AREG BESY CAAT2 CACA4 CASTI3 CAUT CHAN9 CIVI5 ERLO GEMA4 MAPO16 MEAR4 PAPA19 POAM8 PONO3 ROAC ROPAF2 RUMA4 SAAR3 SAGL SAPS SOCA6 STLO SYFA	— Achillea sibirica Agrostis scabra Argentina egedii Beckmannia syzigachne Carex atherodes Calamagrostis canadensis Calamagrostis stricta ssp. inexpansa Carex utriculata Chamerion angustifolium Cicuta virosa Erigeron lonchophyllus Geum macrophyllum Marchantia polymorpha Mentha arvensis Packera pauciflora Polygonum amphibium Potentilla norvegica Rosa acicularis Rorippa palustris ssp. fernaldiana Rumex maritimus Salix arbusculoides Salix glauca Salix pseudomonticola Solidago canadensis Stellaria longifolia Symphyotrichum falcatum	Moss Siberian yarrow rough bentgrass Pacific silverweed American sloughgrass wheat sedge bluejoint northern reedgrass Northwest Territory sedge fireweed Mackenzie's water hemlock shortray fleabane largeleaf avens — wild mint alpine groundsel water knotweed Norwegian cinquefoil prickly rose Fernald's yellowcress golden dock littletree willow grayleaf willow false mountain willow Canada goldenrod longleaf starwort white prairie aster	— — — — — — — — — — — — — — — — — — — — — — — — — — —	3 1 5 — 1 20 60 4 20 2 — 5 10 — 10 — 1 8 — — — — 1 2 1 — 5	— — — — — — — — — — — — — — — — — — — — — — — — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
mollic epipedon sapric soil materials redox concentrations cambic horizon aquic conditions reduced matrix endosaturation	0—18 0—5 5—180 18—40 102—200 102—180 160—200	—- —- —- —- —- —- —-

Site Soil Temperature
Site Obs. Date	Depth	Sensor Kind	Temperature
	cm		C
8/15/2012	50	—	10

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
—	—	—	128	—		—	—	—	—	—	—	—	—	—	—	—	—	—	—

Oa—0 to 5 centimeters (0.0 to 2.0 inches); black (10YR 2/1) highly decomposed plant material; low excavation difficulty; 1.0 medium roots throughout and 5.0 fine roots throughout; fragments; very slight effervescence, by hcl, 1n; neutral, pH 7.0, pH meter; clear smooth boundary.; moist when described; observed in pit, small

A—5 to 18 centimeters (2.0 to 7.1 inches); very dark gray (2.5Y 3/1) silty clay loam; weak fine granular structure; low excavation difficulty; 7.0 fine roots throughout; 5 percent medium distinct irregular weakly coherent cemented strong brown (7.5YR 4/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n; moderately alkaline, pH 8.0, pH meter; clear smooth boundary. Lab sample # 13N03749; moist when described; observed in pit, small

Bg1—18 to 40 centimeters (7.1 to 15.7 inches); 70 percent grayish brown (2.5Y 5/2) and 30 percent gray (2.5Y 5/1) silt loam; moderate fine granular structure; low excavation difficulty; 5.0 fine roots throughout; 15 percent medium distinct irregular weakly coherent cemented dark yellowish brown (10YR 4/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; strong effervescence, by hcl, 1n; slightly alkaline, pH 7.8, pH meter; diffuse smooth boundary. Lab sample # 13N03750; moist when described; observed in pit, small

Bg2—40 to 64 centimeters (15.7 to 25.2 inches); gray (2.5Y 5/1) silt; weak medium subangular blocky structure; low excavation difficulty; 4.0 fine roots throughout; 3 percent medium prominent irregular weakly coherent cemented dusky red (10R 3/3), moist, masses of oxidized iron with clear boundaries in matrix and 5 percent medium prominent irregular weakly coherent cemented strong brown (7.5YR 4/6), moist, masses of oxidized iron with clear boundaries in matrix and 15 percent medium distinct irregular weakly coherent cemented brown (7.5YR 4/4), moist, masses of oxidized iron with clear boundaries in matrix; fragments; very slight effervescence, by hcl, 1n; slightly alkaline, pH 7.7, pH meter; clear smooth boundary. Lab sample # 13N03751; moist when described; observed in pit, small. Noted structure is questionable but there is good root density in this horizon and appears more developed than the material below.

C1—64 to 80 centimeters (25.2 to 31.5 inches); 95 percent olive (5Y 5/4) and 5 percent gray (2.5Y 5/1) stratified stratified silt loam; massive; moderate excavation difficulty; 1.0 medium roots throughout and 2.0 fine roots throughout; 5 percent medium prominent irregular weakly coherent cemented strong brown (7.5YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix and 15 percent fine distinct irregular weakly coherent cemented strong brown (7.5YR 4/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; very slight effervescence, by hcl, 1n; slightly alkaline, pH 7.7, pH meter; clear wavy boundary. Lab sample # 13N03752; moist when described; observed in pit, small. Four distinct bands of organic material approximately 2 to 5 mm thick.

C2—80 to 102 centimeters (31.5 to 40.2 inches); 80 percent dark gray (5Y 4/1) and 10 percent dark gray (2.5Y 4/1) and 10 percent light olive brown (2.5Y 5/3) stratified stratified silt loam; massive; moderate excavation difficulty; 1.0 medium roots throughout and 2.0 fine roots throughout; 5 percent medium distinct threadlike weakly coherent cemented dark yellowish brown (10YR 4/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; very slight effervescence, by hcl, 1n; slightly alkaline, pH 7.4, pH meter; clear wavy boundary. Lab sample # 13N03753; moist when described; observed in pit, small. Several bands of fine sand are found in this layer (too thin to sample) with color ranging from 7.5yr 5/6 from F3M staining to 10yr 5/3 for a matrix color.

Cg1—102 to 160 centimeters (40.2 to 63.0 inches); 60 percent dark gray (N 4/), and 40 percent dark grayish brown (2.5Y 4/2) stratified stratified very fine sandy loam to silt loam; massive; moderate excavation difficulty; 1.0 fine roots throughout; 20 percent medium distinct threadlike weakly coherent cemented strong brown (7.5YR 4/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; very slight effervescence, by hcl, 1n; slightly alkaline, pH 7.4, pH meter; clear smooth boundary. Lab sample # 13N03754, 13N03755, 13N03756; moist when described; observed in pit, small. Horizon divided into three distinct bands: a sand, a brown sil, and a bluish grey sil. The silt loams are similar texture. The Brown sil was collected in a bulk sample only. The blue/grey color sil was sampled for both clod and bulk material. The sand component was sampled for bulk material, no clods.

Cg2—160 to 180 centimeters (63.0 to 70.9 inches); 96 percent very dark gray (N 3/), and 3 percent olive (5Y 5/4) and 1 percent black (N 2.5/), silt loam; massive; moderate excavation difficulty; fragments; slight effervescence, by hcl, 1n; slightly alkaline, pH 7.4, pH meter. Lab sample # 13N03757; wet, satiated when described; observed in pit, small