IDENTIFIERS

Current Taxon Name (Soil Name): Seymour

OSD

Series Extent

User Site ID: S1962IA185006

User Pedon ID: S1962IA185006

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - SSL

Lab Pedon # - 40A1507

NCSS Pedon Lab Data NASIS Record ID - 35115

Print Date: 4/24/2025

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: 40.7163887

Std. Longitude: -93.1461105

Datum: WGS84

Township: 68N

Range: 20W

Section: 3

PLSS Details: northeast corner of the SW1/4

Location Description: 342 feet west and 497 feet south of the center of road; about 2 miles S of Promise City

State: Iowa

County: IA185—Wayne

MLRA: 109—Iowa and Missouri Heavy Till Plain

Non-MLRA Soil Survey Area: IA185—Wayne County, Iowa

PEDON

Describers Name: A.R. Hidlebaugh and R.I. Dideriksen

Current Taxonomic Class: Fine, smectitic, mesic Aquic Argiudolls

Current Taxon Kind: series

Pedon Type: OSD pedon

Pedon Record Orgin: Converted from PDP 3.x

Pedon #: 6

Correlated Information:

Soil Name - Seymour

PSC - 38 to 88 cm.

Classificaton Date - 7/23/2007

Moisture Class - udic

Moisture Subclass - aquic

Sampled As Information:

Soil Name - Seymour

Classificaton Date - 10/18/1962

Dynamic Soil Properties:

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: loess

Geomorphic Component Hills: interfluve

Hill Slope Profile: summit

Slope Shape Down: convex

Drainage Class: somewhat poorly

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 10/18/1962 (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

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
2	—	—	—	—	0	—	—	—	—	—	—	—	—	—	—	—	—	—	—

A1p—0 to 18 centimeters (0.0 to 7.1 inches); very dark gray (10YR 3/1), gray (10YR 5/1), dry; silt loam; weak thick platy parts to weak fine subangular blocky, and fine granular structure; friable; 10.0 fine roots; fragments; slightly acid, pH 6.2, unspecified; abrupt smooth boundary. Lab sample # 40A11798. platy structure at contact with horizon below and due to compaction.

A12—18 to 28 centimeters (7.1 to 11.0 inches); very dark gray (10YR 3/1) and very dark grayish brown (10YR 3/2) and very dark gray (10YR 3/1) rubbed, gray (10YR 5/1) and gray (10YR 6/1), dry; silt loam; weak very fine subangular blocky, and weak fine granular structure; friable; 10.0 fine roots; fragments; moderately acid, pH 5.6, unspecified; clear smooth boundary. Lab sample # 40A11799. few krotovinas; weak platiness between 7 to 8 inches due to compaction;

A3—28 to 38 centimeters (11.0 to 15.0 inches); very dark gray (10YR 3/1) and 20 percent very dark grayish brown (10YR 3/2) and very dark grayish brown (10YR 3/2) rubbed silty clay loam; moderate very fine subangular blocky structure; friable; 10.0 fine roots; 15 percent faint silt coats on faces of peds; fragments; clear smooth boundary. Lab sample # 40A11800. (10YR 3/2) color increases with depth; few wormcasts or mixings of dark grayish brown (10YR 4/2); few krotovinas.

B1—38 to 48 centimeters (15.0 to 18.9 inches); dark grayish brown (2.5Y 4/2), gray (10YR 6/1) and light brownish gray (10YR 6/2), dry; silty clay; 1 percent olive brown (2.5Y 4/4) fine mottles; moderate very fine subangular blocky structure; friable; 3.0 fine roots; 15 percent faint silt coats on faces of peds; fragments; moderately acid, pH 5.8, unspecified; clear smooth boundary. Lab sample # 40A11801

B21—48 to 58 centimeters (18.9 to 22.8 inches); dark grayish brown (10YR 4/2) and dark gray (10YR 4/1) silty clay; 10 percent dark yellowish brown (10YR 4/4) fine and 25 percent yellowish brown (10YR 5/4) distinct mottles; strong very fine subangular blocky structure; firm; 0.5 fine roots; 15 percent silt coats on faces of peds; fragments; moderately acid, pH 6.0, unspecified; clear smooth boundary. Lab sample # 40A11802. krotovina (1 by 3 inches) filled with very dark gray silty clay loam at side of pit.

B22—58 to 70 centimeters (22.8 to 27.6 inches); very dark gray (10YR 3/1) silty clay; 1 percent brown (10YR 4/3) fine and 25 percent yellowish brown (10YR 5/4) fine and 25 percent yellowish brown (10YR 5/6) fine mottles; strong very fine angular blocky, and strong very fine subangular blocky structure; firm; 0.5 very fine and fine roots; 0.5 fine tubular pores; faint clay films and 15 percent pressure faces; fragments; clear smooth boundary. Lab sample # 40A11803. continuous - phpvsfiid 174995; continuous - phpvsfiid 174995

B23—70 to 90 centimeters (27.6 to 35.4 inches); dark gray (10YR 4/1) and dark grayish brown (10YR 4/2) and grayish brown (2.5Y 5/2) silty clay; 10 percent yellowish brown (10YR 5/4) fine and 10 percent yellowish brown (10YR 5/6) fine and 10 percent strong brown (7.5YR 5/8) fine mottles; weak medium prismatic parts to moderate fine and medium subangular blocky structure; firm; 0.5 fine tubular pores; faint clay films and 3 percent faint silt coats and 15 percent very dark gray (10YR 3/1) clay films in root channels and/or pores and 15 percent pressure faces; fragments; slightly acid, pH 6.5, unspecified; clear irregular boundary. Lab sample # 40A11804. less oxides than above horizon.; discontinuous - phpvsfiid 174997; discontinuous - phpvsfiid 174997

B31—90 to 115 centimeters (35.4 to 45.3 inches); olive gray (5Y 5/2) and dark gray (N 4/0) silty clay loam; 10 percent yellowish brown (10YR 5/6) medium mottles; moderate medium prismatic parts to moderate medium subangular blocky structure; firm; 3.0 fine tubular pores; faint clay films on faces of peds and in pores and 15 percent faint silt coats on faces of peds and 15 percent pressure faces; fragments; neutral, pH 6.7, unspecified; gradual smooth boundary. Lab sample # 40A11805. discontinuous - phpvsfiid 175001; discontinuous - phpvsfiid 175001

B32—115 to 138 centimeters (45.3 to 54.3 inches); olive gray (5Y 5/2) and dark gray (N 4/0) silty clay loam; 10 percent strong brown (7.5YR 5/6) fine and medium mottles; moderate medium prismatic parts to moderate medium subangular blocky structure; firm; 3.0 fine tubular pores; dark gray (10YR 4/1) clay films on vertical faces of peds and 15 percent very dark gray (10YR 3/1) clay films in root channels and/or pores and 15 percent pressure faces; fragments; neutral, pH 6.7, unspecified; gradual smooth boundary. Lab sample # 40A11806. several 1/2 inch clay ball accumulations.

B33—138 to 163 centimeters (54.3 to 64.2 inches); olive gray (5Y 5/2) and dark gray (N 4/0) silty clay loam; 10 percent yellowish brown (10YR 5/6) fine and 10 percent strong brown (7.5YR 5/6) fine mottles; weak coarse prismatic parts to weak coarse angular blocky structure; firm; 3.0 fine tubular pores; very dark gray (10YR 3/1) clay films in root channels and/or pores; fragments; abrupt wavy boundary. Lab sample # 40A11807. several 1/2 inch clay ball accumulations.

2Ab—163 to 178 centimeters (64.2 to 70.1 inches); dark gray (10YR 4/1) silty clay loam, sand; 25 percent yellowish brown (10YR 5/6) medium mottles; firm; 3 percent dark gray (10YR 4/1) clay films; fragments. Lab sample # 40A11808. quartz grains visible; paleosol; clay flows from loess into paleosol on vertical channels.