IDENTIFIERS

Current Taxon Name (Soil Name): Powwahkee

OSD

Series Extent

User Site ID: S1985WA075014

User Pedon ID: 85WA075014

Vegetation Plot ID: S1985WA075014

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - SSL

Lab Pedon # - 86P0076

NCSS Pedon Lab Data NASIS Record ID - 57881

Print Date: 11/21/2024

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: 46.6716652

Std. Longitude: -117.1372223

Datum: WGS84

Township: 14N

Range: 45E

Section: 27

PLSS Details: About 4 miles S of Pullman, WA, 840 feet E and 1,300 feet S of NW corner

State: Washington

County: WA075—Whitman

MLRA: 9—Palouse and Nez Perce Prairies

PEDON

Describers Name: H. Gentry, R. Engel, A. Busacca, and B. Frazier

Pedon Purpose: full pedon description

Pedon Record Orgin: Converted from SSL-CMS data

Pedon #: 14

Sampled As Information:

Soil Name - Powwahkee

Taxonomic Class - Fine-silty, mixed Pachic Ultic Argixerolls

PSC - 30 to 80 cm.

Classificaton Date - 9/1/1985

Moisture Class - xeric

Dynamic Soil Properties:

Erosion Class - 2

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Landscape: hills

Landform: hillside or mountainside

Hill Slope Profile: backslope

Slope Position: middle third

Slope Shape Down: linear

Runoff: medium

Drainage Class: well

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 9/1/1985 (actual site observation date)

Surface Cover Properties:

Site Obs. Cover Kind 1 - crop cover

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Site Erosion Accelerated: water erosion

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
AGSP FEID	Agropyron spicatum Festuca idahoensis	— Idaho fescue	— —	— —	— —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
mollic epipedon argillic horizon	0—64 30—91	—- —-

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
12	—	—	772	—	135	51	—	—	9	20	-2	10	21	-1	—	—	—	—	—

1Ap1—0 to 8 centimeters (0.0 to 3.1 inches); dark grayish brown (10YR 4/2) crushed, very dark brown (10YR 2/2) crushed, moist; silt loam; moderate medium subangular blocky, and moderate medium granular, and moderate fine granular structure; slightly hard, friable, slightly sticky, slightly plastic; 5.5 very fine roots throughout; 5.5 very fine interstitial pores; fragments; slightly acid, pH 6.2, bromthymol blue; abrupt smooth boundary. Lab sample # 86P00442. many very fine roots throughout

1Ap2—8 to 30 centimeters (3.1 to 11.8 inches); dark grayish brown (10YR 4/2) crushed, very dark brown (10YR 2/2) crushed, moist; silt loam; moderate coarse subangular blocky, and moderate medium subangular blocky structure; hard, friable, slightly sticky, slightly plastic; 2.5 very fine roots throughout; 5.5 very fine interstitial pores; fragments; slightly acid, pH 6.2, bromthymol blue; abrupt smooth boundary. Lab sample # 86P00443. Layer of organic material at lower boundary.; common very fine roots throughout

1ABt—30 to 46 centimeters (11.8 to 18.1 inches); brown (10YR 5/3) crushed, very dark grayish brown (10YR 3/2) crushed, moist; silt loam; moderate coarse prismatic, and moderate medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 2.5 very fine roots throughout; 5.5 very fine tubular pores; 2 percent faint 7.5YR 4/ (7.5YR 4/) clay films on faces of peds and in pores; fragments; neutral, pH 6.6, bromthymol blue; gradual smooth boundary. Lab sample # 86P00444. Common coarse vertical pores lined and partially filled with dark colored surface material; many continuous prominent dark grayish brown (10YR 4/2) coats on vertical faces of coarse prisms; common very coarse cicada casts.; very few clay films surface features on faces of peds and in pores; common very fine roots throughout; patchy - phpvsfiid 219713; patchy - phpvsfiid 219713

1BAt—46 to 64 centimeters (18.1 to 25.2 inches); brown (10YR 5/3) crushed, dark brown (10YR 3/3) crushed, moist; silt loam; moderate coarse prismatic, and moderate medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 2.5 very fine roots throughout; 5.5 very fine tubular pores; 2 percent faint 7.5YR 4/ (7.5YR 4/) clay films on faces of peds and in pores; fragments; neutral, pH 6.8, bromthymol blue; gradual smooth boundary. Lab sample # 86P00445. Common coarse vertical pores lined and partially filled and some filled with dark colored surface material; many continuous prominent dark grayish brown (10YR 4/2) coats on vertical faces of coarse prisms; common very coarse cicada casts.; very few clay films surface features on faces of peds and in pores; common very fine roots throughout; patchy - phpvsfiid 219714; patchy - phpvsfiid 219714

1Bt—64 to 91 centimeters (25.2 to 35.8 inches); yellowish brown (10YR 5/4) crushed, brown (10YR 4/3) crushed, moist; silt loam; moderate coarse prismatic, and moderate medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 2.5 very fine roots throughout; 5.5 very fine tubular pores; 2 percent faint 7.5YR 4/ (7.5YR 4/) clay films on faces of peds and in pores; fragments; neutral, pH 7.0, bromthymol blue; gradual smooth boundary. Lab sample # 86P00446. Common coarse vertical pores lined, partially filled and some filled with dark colored surface material; common continuous prominent dark grayish brown (10YR 4/2) coats on vertical faces of coarse prisms; common very coarse cicada casts.; very few clay films surface features on faces of peds and in pores; common very fine roots throughout; patchy - phpvsfiid 231167; patchy - phpvsfiid 231167

1Bw1—91 to 111 centimeters (35.8 to 43.7 inches); yellowish brown (10YR 5/4) crushed, brown (10YR 4/3) crushed, moist; silt loam; moderate coarse prismatic, and moderate medium prismatic structure; hard, friable, moderately sticky, moderately plastic; 2.5 very fine roots throughout; 5.5 very fine tubular pores; fragments; neutral, pH 7.0, bromthymol blue; gradual smooth boundary. Lab sample # 86P00447. Common coarse vertical pores lined and partially filled with dark colored surface material; few patchy prominent dark grayish brown (10YR 4/2) on vertical faces of coarse prisms.; common very fine roots throughout

1Bw2—111 to 150 centimeters (43.7 to 59.1 inches); brown (10YR 4/3) crushed, brown (10YR 4/3) crushed, moist; silt loam; moderate coarse prismatic, and moderate medium prismatic structure; hard, friable, moderately sticky, moderately plastic; 0.5 very fine roots throughout; 5.5 very fine tubular pores; fragments; neutral, pH 7.0, bromthymol blue; gradual smooth boundary. Lab sample # 86P00448. Common coarse vertical pores lined and partially filled with dark colored surface material.; few very fine roots throughout

1Bw3—150 to 170 centimeters (59.1 to 66.9 inches); dark brown (10YR 3/3) crushed, brown (10YR 4/3) crushed, moist; silt loam; moderate coarse prismatic, and moderate medium prismatic structure; hard, friable, slightly sticky, slightly plastic; 0.5 very fine roots throughout; 5.5 very fine tubular pores; fragments; slightly alkaline, pH 7.4, bromthymol blue; clear smooth boundary. Lab sample # 86P00449. Common coarse vertical pores lined and filled with dark colored surface material.; few very fine roots throughout

1Bk1—170 to 183 centimeters (66.9 to 72.0 inches); pale brown (10YR 6/3) crushed, brown (10YR 5/3) crushed, moist; silt loam; massive; hard, firm, slightly sticky, slightly plastic; 2.5 very fine tubular pores; 37 percent prominent white (10YR 8/1) carbonate coats in root channels and/or pores; fragments; slight effervescence, by hcl, unspecified; moderately alkaline, pH 8.3, thymol-blue; gradual smooth boundary. Lab sample # 86P00450. Few coarse vertical pores lined with lime and some filled, few discontinuous prominent white (10YR 8/1) lime coats in seams.; common lime or carbonate coats surface features in root channels and/or pores; effervescence is discontinuous; continuous - phpvsfiid 231168; continuous - phpvsfiid 231168

1Bk2—183 to 201 centimeters (72.0 to 79.1 inches); light yellowish brown (10YR 6/4) crushed, dark yellowish brown (10YR 4/4) crushed, moist; silt loam; massive; hard, firm, slightly sticky, slightly plastic; 5.5 very fine tubular pores; 37 percent prominent white (10YR 8/1) carbonate coats in root channels and/or pores; fragments; slight effervescence, by hcl, unspecified; moderately alkaline, pH 8.2, thymol-blue. Lab sample # 86P00451. Few coarse vertical pores lined with lime and some filled, few discontinuous prominent white (10YR 8/1) lime coats in seams.; common lime or carbonate coats surface features in root channels and/or pores; effervescence is discontinuous; continuous - phpvsfiid 231169; continuous - phpvsfiid 231169