IDENTIFIERS

Current Taxon Name (Soil Name): COULTERVILLE

OSD

Series Extent

User Site ID: S1990IL189046

User Pedon ID: S1990IL189046

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - SSL

Lab Pedon # - 91P0301

NCSS Pedon Lab Data NASIS Record ID - 63348

Print Date: 3/2/2025

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: 38.3805542

Std. Longitude: -89.4375000

Datum: WGS84

Township: 2S

Range: 3W

Section: 4

PLSS Details: 2310 feet E and 1480 feet N of the SW corner

State: Illinois

County: IL189—Washington

MLRA: 113—Central Claypan Areas

Non-MLRA Soil Survey Area: IL189—Washington County, Illinois

PEDON

Describers Name: KDB,MRG, WMM

Current Taxonomic Class: Fine-silty, mixed, mesic Aeric Ochraqualfs

Pedon Record Orgin: Converted from PDP 3.x

Pedon #: 46

Correlated Information:

Soil Name - COULTERVILLE

PSC - 43 to 93 cm.

Classificaton Date - 12/9/2004

Moisture Class - aquic

Sampled As Information:

Soil Name - Coulterville

Taxonomic Class - Fine, montmorillonitic, mesic Aeric Ochraqualf

Taxon Kind - series

Classificaton Date - 10/3/1990

Moisture SUBClass - aeric

Dynamic Soil Properties:

Erosion Class - 1

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: loess

Landform: upland slope

Drainage Class: somewhat poorly

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 10/3/1990 (actual site observation date)

Surface Cover Properties:

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
—	—	—	140	—		—	—	—	—	—	—	—	—	—	—	—	—	—	—

Ap—0 to 20 centimeters (0.0 to 7.9 inches); dark grayish brown (10YR 4/2) silt loam; 17 percent clay; moderate fine granular structure; friable; 3.0 fine roots; 10 percent iron-manganese nodules; fragments; neutral, pH 7.0; abrupt smooth boundary. Lab sample # 91P01839; moist when described;

E1—20 to 36 centimeters (7.9 to 14.2 inches); grayish brown (10YR 5/2) silt loam; 16 percent clay; moderate medium platy structure; friable; 3.0 fine roots; 10 percent iron-manganese nodules; fragments; slightly acid, pH 6.4; clear smooth boundary. Lab sample # 91P01840; moist when described;

E2—36 to 43 centimeters (14.2 to 16.9 inches); grayish brown (10YR 5/2) silt loam; 18 percent clay; moderate medium subangular blocky, and weak medium platy structure; friable; 3.0 fine roots; 10 percent iron-manganese nodules; fragments; moderately acid, pH 6.0; abrupt smooth boundary. Lab sample # 91P01841; moist when described;

Bt1—43 to 53 centimeters (16.9 to 20.9 inches); brown (10YR 4/3) silty clay loam; 35 percent clay; 1 percent yellowish brown (10YR 5/6) medium distinct mottles; moderate medium subangular blocky structure; firm; 3.0 fine roots; 10 percent distinct very dark grayish brown (10YR 3/2), moist, organic stains on all faces of peds and 75 percent distinct dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 10 percent iron-manganese nodules; fragments; strongly acid, pH 5.4; clear smooth boundary. Lab sample # 91P01842; moist when described;

Btg1—53 to 71 centimeters (20.9 to 28.0 inches); grayish brown (10YR 5/2) silty clay loam; 37 percent clay; 3 percent yellowish brown (10YR 5/6) medium distinct mottles; moderate medium prismatic structure; firm; 0.5 fine roots; 75 percent distinct dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 10 percent iron-manganese nodules; fragments; moderately acid, pH 5.9; gradual smooth boundary. Lab sample # 91P01843; moist when described;

Btg2—71 to 86 centimeters (28.0 to 33.9 inches); grayish brown (2.5Y 5/2) silty clay loam; 35 percent clay; 3 percent yellowish brown (10YR 5/6) fine prominent mottles; moderate medium prismatic structure; firm; 0.5 very fine roots; 30 percent distinct dark gray (10YR 4/1), moist, clay films on all faces of peds and 30 percent distinct dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 30 percent iron-manganese nodules; fragments; neutral, pH 7.1; gradual smooth boundary. Lab sample # 91P01844; moist when described;

Btg3—86 to 99 centimeters (33.9 to 39.0 inches); grayish brown (2.5Y 5/2) silty clay loam; 36 percent clay; 1 percent yellowish brown (10YR 5/6) fine prominent mottles; moderate medium prismatic structure; firm; 0.5 very fine roots; 30 percent distinct grayish brown (10YR 5/2), moist, clay films on all faces of peds; 10 percent iron-manganese nodules; fragments; neutral, pH 7.2; gradual smooth boundary. Lab sample # 91P01845; moist when described;

Btg4—99 to 117 centimeters (39.0 to 46.1 inches); light brownish gray (2.5Y 6/2) silty clay loam; 29 percent clay; 1 percent dark yellowish brown (10YR 4/4) fine prominent and 3 percent strong brown (7.5YR 5/8) medium prominent mottles; weak medium prismatic structure; firm; 0.5 very fine roots; 30 percent distinct light brownish gray (2.5Y 6/2), moist, clay films on all faces of peds; 30 percent iron-manganese nodules; fragments; neutral, pH 7.2; gradual smooth boundary. Lab sample # 91P01846; moist when described;

Btg5—117 to 140 centimeters (46.1 to 55.1 inches); light brownish gray (2.5Y 6/2) silt loam; 24 percent clay; 1 percent yellowish brown (10YR 5/6) medium prominent and 1 percent strong brown (7.5YR 5/8) medium prominent mottles; weak medium prismatic structure; friable; 0.5 very fine roots; 10 percent distinct grayish brown (2.5Y 5/2), moist, clay films on all faces of peds; 10 percent iron-manganese nodules; fragments; slightly alkaline, pH 7.4; clear smooth boundary. Lab sample # 91P01847; moist when described;

2Btg6—140 to 152 centimeters (55.1 to 59.8 inches); light brownish gray (2.5Y 6/2) silt loam; 18 percent clay; 1 percent yellowish brown (10YR 5/6) medium prominent mottles; 0.5 very fine roots; 10 percent iron-manganese nodules; fragments; slightly alkaline, pH 7.4. Lab sample # 91P01848; moist when described;