IDENTIFIERS

Current Taxon Name (Soil Name): Clarksdale

OSD

Series Extent

User Site ID: S1977IL073001

User Pedon ID: S1977IL073001

Lab Information:

Certified Lab Pedon Description - yes

Lab Source ID - IL SCL

Lab Pedon # - 77IL073001

NCSS Pedon Lab Data NASIS Record ID - 20868

Print Date: 11/23/2024

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: 41.1579248

Std. Longitude: -90.3791594

Datum: WGS84

Township: 14N

Range: 1E

Section: 34

PLSS Details: 2,427 feet north and 487 feet east of the southwest corner

Location Description: Sampled and described: ( 8/1/1976)

Map Unit: 257A—Clarksdale silt loam, 0 to 2 percent slopes

Country: US—United States

State: Illinois

County: IL073—Henry

MLRA: 108—Illinois and Iowa Deep Loess and Drift

Regional Office: NC—North Central

MLRA Soil Survey Area: NC-SPI—Springfield, Illinois

Non-MLRA Soil Survey Area: IL073—Henry County, Illinois

7.5 Minute USGS Quad: 41090-B4—New Windsor, Illinois

PEDON

Describers Name: Raymond J. Herman & crew

Current Taxonomic Class: Fine, smectitic, mesic Udollic Endoaqualfs

Current Taxon Kind: series

Pedon Type: classifies to current taxon name, full description

Pedon Purpose: soil survey inventory

Pedon Record Orgin: PedonPC

Pedon #: 1

Correlated Information:

Soil Name - Clarksdale

PSC - 33 to 83 cm.

Classificaton Date - 7/10/2009

Soil Taxonomic Edition - twelfth edition

Moisture Class - aquic

Moisture Subclass - aeric

Sampled As Information:

Soil Name - Clarksdale

PSC - 41 to 91 cm.

Classificaton Date - 8/1/1976

Dynamic Soil Properties:

Erosion Class - 1

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: Medium-textured Peoria Loess

Landscape: till plain

Landform: ground moraine

Drainage Class: somewhat poorly

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 8/1/1976 (actual site observation date)

Surface Cover Properties:

Site Obs. Cover Kind 1 - crop cover

Site Obs. Cover Kind 2 - row crop

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			%	%	%	%	%	%		%	%	%	%	%			%	%
Ap E Bt1 Bt2 Btg1 Btg2 Btg3 Btg4 Cg1 Cg2	0 23 33 41 48 74 97 112 170 213	23 33 41 48 74 97 112 170 213 229	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —

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
Ap E Bt1 Bt2 Btg1 Btg2 Btg3 Btg4 Cg1 Cg2	0 23 33 41 48 74 97 112 170 213	23 33 41 48 74 97 112 170 213 229	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —		— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —

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	%
Ap E Bt1 Bt2 Btg1 Btg2 Btg3 Btg4 Cg1 Cg2	0 23 33 41 48 74 97 112 170 213	23 33 41 48 74 97 112 170 213 229	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon argillic horizon	0—33 33—170	—33— —137—

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
1.5	—	—	—	—		—	—	—	—	—	—	—	—	—	—	—	—	—	—

Ap—0 to 23 centimeters (0.0 to 9.1 inches); 80 percent very dark grayish brown (10YR 3/2) and 20 percent grayish brown (10YR 5/2), grayish brown (10YR 5/2), dry; silt loam; weak fine granular structure; friable; fragments; neutral, pH 7.1; abrupt smooth boundary. Lab sample # IL24699. mixing of grayish brown (10YR 5/2) silt loam from the E horizon

E—23 to 33 centimeters (9.1 to 13.0 inches); grayish brown (10YR 5/2) silt loam; mottles; weak medium platy parts to weak fine granular structure; friable; 10 percent fine faint irregular brown (10YR 5/3), moist, masses of oxidized iron with clear boundaries in matrix and 25 percent prominent cylindrical light gray (10YR 7/2), dry, clay depletions with sharp boundaries on faces of peds; fragments; neutral, pH 7.0; clear smooth boundary. Lab sample # IL24700

Bt1—33 to 41 centimeters (13.0 to 16.1 inches); brown (10YR 5/3) silty clay loam; and mottles; weak fine subangular blocky structure; friable; dark grayish brown (10YR 4/2), moist, and 25 percent distinct grayish brown (10YR 5/2), moist, clay films on all faces of peds; 1 percent distinct irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix and 10 percent prominent cylindrical light gray (10YR 7/2), dry, clay depletions with sharp boundaries on faces of peds and 25 percent fine faint irregular grayish brown (2.5Y 5/2), moist, iron depletions with clear boundaries in matrix; fragments; slightly acid, pH 6.4; clear smooth boundary. Lab sample # IL24701. continuous - phpvsfiid 1414256; continuous - phpvsfiid 1414256

Bt2—41 to 48 centimeters (16.1 to 18.9 inches); brown (10YR 5/3) silty clay loam; and mottles; moderate fine subangular blocky structure; firm; and 35 percent distinct dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 1 percent fine distinct irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix and 10 percent medium faint irregular grayish brown (2.5Y 5/2), moist, iron depletions with clear boundaries in matrix and 10 percent prominent cylindrical white (10YR 8/1), dry, clay depletions with clear boundaries on faces of peds; fragments; strongly acid, pH 5.4; clear smooth boundary. Lab sample # IL24702. continuous - phpvsfiid 1414250; continuous - phpvsfiid 1414250

Btg1—48 to 74 centimeters (18.9 to 29.1 inches); grayish brown (10YR 5/2) silty clay; and mottles; moderate medium prismatic parts to moderate medium subangular blocky structure; firm; 35 percent distinct dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 5 percent fine faint irregular pale brown (10YR 6/3), moist, masses of oxidized iron with clear boundaries in matrix and 5 percent fine prominent irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix and 5 percent fine faint irregular light brownish gray (2.5Y 6/2), moist, iron depletions with clear boundaries in matrix and 10 percent fine prominent irregular dark yellowish brown (10YR 4/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; strongly acid, pH 5.2; gradual smooth boundary. Lab sample # IL24703, IL24704. Horizon split for sampling: IL24703 48 to 61 cm, IL24704 61 to 74 cm.; The pHY's of the Btg1 & Btg2 horizons are too acid; continuous - phpvsfiid 1414253; continuous - phpvsfiid 1414253

Btg2—74 to 97 centimeters (29.1 to 38.2 inches); grayish brown (2.5Y 5/2) silty clay loam; mottles; moderate medium prismatic parts to moderate medium subangular blocky structure; firm; 25 percent distinct dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 5 percent fine prominent irregular strong brown (7.5YR 4/6), moist, masses of oxidized iron with clear boundaries between peds and 10 percent fine distinct cylindrical yellowish brown (10YR 5/4), moist, masses of oxidized iron with sharp boundaries in matrix and 25 percent medium prominent irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; strongly acid, pH 5.4; gradual smooth boundary. Lab sample # IL24705, IL24706. Horizon split for sampling: IL24705 74 to 84 cm, IL24706 84 to 97 cm.; the pH's in the Btg1 and Btg2 horizons are too acid; continuous - phpvsfiid 1414254; continuous - phpvsfiid 1414254

Btg3—97 to 112 centimeters (38.2 to 44.1 inches); grayish brown (2.5Y 5/2) silty clay loam; mottles; weak medium prismatic parts to moderate medium subangular blocky structure; firm; 25 percent distinct dark grayish brown (2.5Y 4/2), moist, clay films on vertical faces of peds; 5 percent fine prominent cylindrical strong brown (7.5YR 4/6), moist, masses of oxidized iron with sharp boundaries on surfaces along root channels and 25 percent fine prominent irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; slightly acid, pH 6.4; gradual smooth boundary. Lab sample # IL24707. continuous - phpvsfiid 1414258; continuous - phpvsfiid 1414258

Btg4—112 to 170 centimeters (44.1 to 66.9 inches); light brownish gray (2.5Y 6/2) silty clay loam; mottles; weak coarse prismatic parts to moderate medium angular blocky structure; friable; 25 percent distinct dark grayish brown (2.5Y 4/2), moist, clay films on vertical faces of peds; 15 percent medium distinct irregular yellowish brown (10YR 5/4), moist, masses of oxidized iron with diffuse boundaries in matrix and 15 percent medium prominent irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron with diffuse boundaries in matrix; fragments; neutral, pH 6.8; clear smooth boundary. Lab sample # IL24708. continuous - phpvsfiid 1414252; continuous - phpvsfiid 1414252

Cg1—170 to 213 centimeters (66.9 to 83.9 inches); variegated 70 percent light brownish gray (2.5Y 6/2) and 30 percent yellowish brown (10YR 5/6) silt loam; massive; friable; 10 percent distinct dark grayish brown (2.5Y 4/2), moist, clay films on surfaces along pores; 10 percent fine prominent irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron with diffuse boundaries in matrix and 10 percent fine prominent irregular strong brown (7.5YR 5/8), moist, masses of oxidized iron with diffuse boundaries in matrix; fragments; slight effervescence; slightly alkaline, pH 7.6; gradual smooth boundary. Lab sample # IL24709. continuous - phpvsfiid 1414255; continuous - phpvsfiid 1414255

Cg2—213 to 229 centimeters (83.9 to 90.2 inches); variegated light brownish gray (2.5Y 6/2) and yellowish brown (10YR 5/6) silt loam; massive; friable; 10 percent fine distinct irregular yellowish brown (10YR 5/4), moist, masses of oxidized iron with diffuse boundaries in matrix and 10 percent fine prominent irregular strong brown (7.5YR 5/8), moist, masses of oxidized iron with diffuse boundaries in matrix; 1 percent fine prominent spherical very pale brown (10YR 8/2), dry, carbonate concretions with sharp boundaries in matrix; fragments; strong effervescence; moderately alkaline, pH 8.1. Lab sample # IL24710