IDENTIFIERS

Current Taxon Name (Soil Name): Yasuda

User Site ID: S2014AK290010

User Pedon ID: S2014AK290010

Vegetation Plot ID: S2014AK290010

User Site Association ID: AK685_3241_CHALKYITSIK_ALLAK685_3241_CHALKYITSIK_MODALAK685_DEPRESSIONS_OTHERAK685_R232XY222AK_RPCmodalAK685_HZNDATA_GROUP3

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - KSSL

Lab Pedon # - 15N0504

NCSS Pedon Lab Data NASIS Record ID - 79646

Print Date: 11/24/2024

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: 66.6400462

Std. Longitude: -144.4361397

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, calcareous, subgelic Typic Halaquepts

Current Taxon Kind: series

Pedon Type: representative pedon for component

Pedon Purpose: laboratory sampling site

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, calcareous Oxyaquic Cryorthents

Taxon Kind - family

PSC - 25 to 100 cm.

Classificaton Date - 12/18/2014

Classifier - N Roth

Soil Taxonomic Edition - twelfth edition

Moisture Class - udic

Moisture SUBClass - oxyaquic

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: concave

Runoff: negligible

Drainage Class: moderately well

Flooding: none flooding

Ponding: occasional ponding for brief periods

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 7/26/2014 (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 AC1 AC2 C1 C2 C3 2C	0 1 15 15 30 45 100 140	1 15 30 30 45 100 140 152	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —

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 AC1 AC2 C1 C2 C3 2C	0 1 15 15 30 45 100 140	1 15 30 30 45 100 140 152	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —		— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —

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 AC1 AC2 C1 C2 C3 2C	0 1 15 15 30 45 100 140	1 15 30 30 45 100 140 152	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —	— — — — — — — —

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
2MOSS ACMI2 ARTI CAST36 ELTR7 ERACD2 GEMA4 GENTI HOJU PONO3 PUNU2 ROAC SACA14 SAGL SOSI3	— Achillea millefolium Artemisia tilesii Calamagrostis stricta Elymus trachycaulus Erigeron acris ssp. debilis Geum macrophyllum Gentiana Hordeum jubatum Potentilla norvegica Puccinellia nuttalliana Rosa acicularis Sanguisorba canadensis Salix glauca Solidago simplex	Moss common yarrow Tilesius' wormwood slimstem reedgrass slender wheatgrass bitter fleabane largeleaf avens gentian foxtail barley Norwegian cinquefoil Nuttall's alkaligrass prickly rose Canadian burnet grayleaf willow Mt. Albert goldenrod	— — — — — — — — — — — — — — —	5 1 — 45 10 — — — 20 — 10 — — — 1	— — — — — — — — — — — — — — —

Pedon Restrictions
Kind	Hardness	Restriction Depth L-H	Restriction Thickness L-RV-H
		cm
abrupt textural change	noncoherent	140 -	—

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon abrupt textural change	0—18 140—	—- —-

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	—	—	152	—	180	—	—	—	—	—	—	—	—	—	—	—	—	—	—

Oe—0 to 1 centimeters (0.0 to 0.4 inches); black (10YR 2/1) moderately decomposed plant material; low excavation difficulty; fragments; moderately alkaline, pH 8.1, pH meter; abrupt smooth boundary.; moist when described; observed in pit, small

A—1 to 13 centimeters (0.4 to 5.1 inches); 70 percent dark gray (2.5Y 4/1) and 10 percent black (2.5Y 2/1) and 10 percent dark gray (5Y 4/1) and 10 percent light olive brown (2.5Y 5/3) silt loam; 28 percent clay; strong coarse prismatic parts to moderate thin platy structure; moderate excavation difficulty; 5.0 very fine roots throughout and 5.0 fine roots throughout; 2 percent fine faint irregular weakly coherent cemented gray (2.5Y 6/1), moist, salt masses with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n; very strongly alkaline, pH 9.6, pH meter; abrupt wavy boundary. Lab sample # 15N02582; moist when described; observed in pit, small

AC1—13 to 23 centimeters (5.1 to 9.1 inches); 70 percent dark grayish brown (2.5Y 4/2) and 10 percent dark gray (5Y 4/1) and 10 percent black (2.5Y 2/1) and 10 percent light olive brown (2.5Y 5/3) silt loam; 28 percent clay; strong coarse prismatic parts to strong thin platy structure; moderate excavation difficulty; 2.0 very fine roots throughout and 5.0 fine roots throughout; 15 percent fine prominent irregular weakly coherent cemented strong brown (7.5YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n; very strongly alkaline, pH 10.1, pH meter; clear wavy boundary. Lab sample # 15N02583; moist when described; observed in pit, small

AC2—23 to 35 centimeters (9.1 to 13.8 inches); 70 percent dark grayish brown (2.5Y 4/2) and 10 percent dark gray (5Y 4/1) and 10 percent black (2.5Y 2/1) and 10 percent light olive brown (2.5Y 5/3) silt loam; 28 percent clay; strong coarse prismatic parts to strong thin platy structure; moderate excavation difficulty; 2.0 very fine roots throughout and 5.0 fine roots throughout; 15 percent fine prominent irregular weakly coherent cemented strong brown (7.5YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n; very strongly alkaline, pH 10.1, pH meter; clear wavy boundary. Lab sample # 15N02584; moist when described; observed in pit, small

C1—35 to 45 centimeters (13.8 to 17.7 inches); 90 percent light olive brown (2.5Y 5/3) and 10 percent gray (2.5Y 5/1) silt loam; 32 percent clay; moderate thin platy structure; moderate excavation difficulty; 2.0 fine roots throughout; 10 percent fine distinct irregular weakly coherent cemented yellowish brown (10YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; strong effervescence, by hcl, 1n; very strongly alkaline, pH 10.1, pH meter; clear wavy boundary.; moist when described; observed in pit, small

C2—45 to 100 centimeters (17.7 to 39.4 inches); dark grayish brown (2.5Y 4/2) silt loam; 22 percent clay; weak thin platy structure; moderate excavation difficulty; 1.0 fine roots throughout; 10 percent fine distinct irregular weakly coherent cemented yellowish brown (10YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; strong effervescence, by hcl, 1n; very strongly alkaline, pH 9.1, pH meter; diffuse smooth boundary.; moist when described; observed in pit, small

C3—100 to 140 centimeters (39.4 to 55.1 inches); dark grayish brown (2.5Y 4/2) very fine sandy loam, silt loam; 16 percent clay; massive; low excavation difficulty; 5 percent fine distinct irregular weakly coherent cemented yellowish brown (10YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix; 2 percent fine faint irregular weakly coherent cemented gray (10YR 6/1), moist, carbonate masses with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n; very strongly alkaline, pH 9.1, pH meter; abrupt smooth boundary.; moist when described; observed in auger, bucket

2C—140 to 152 centimeters (55.1 to 59.8 inches); variegated brown (7.5YR 5/4) fine sand; single grain; low excavation difficulty; 5 percent by volume nonflat rounded indurated 2-3-5 millimeter mixed fragments observed by visual inspection method; noneffervescent, by hcl, 1n; moderately alkaline, pH 8.4, pH meter.; moist when described; observed in auger, bucket