IDENTIFIERS

Current Taxon Name (Soil Name): RELIANCE

OSD

Series Extent

User Site ID: S2017SD053009

User Pedon ID: S2017SD053009

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - KSSL

Lab Pedon # - 18N0154

Print Date: 12/9/2025

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: 43.2703370

Std. Longitude: -99.1937620

Datum: WGS84

Township: 98N

Range: 71W

Section: 25

Map Unit: RlA—Reliance silty clay loam, 0 to 3 percent slopes

State: South Dakota

County: SD053—Gregory

MLRA: 63B—Southern Rolling Pierre Shale Plains

MLRA Soil Survey Area: NC-PIE—Pierre, South Dakota

Non-MLRA Soil Survey Area: SD053—Gregory County, South Dakota

PEDON

Describers Name: A. OXFORD; M. KUYKENDALL

Current Taxonomic Class: Fine, smectitic Pachic Vertic Argiustolls

Current Taxon Kind: taxadjunct

Pedon Type: taxadjunct to the series

Pedon Purpose: laboratory sampling site

Pedon Record Orgin: Spreadsheet

Sampled As Information:

Soil Name - RELIANCE (flagged as OSD)

Taxonomic Class - Fine, smectitic Pachic Vertic Argiustolls

Taxon Kind - taxadjunct

PSC - 5 to 55 cm.

Classificaton Date - 11/27/2017

Classifier - A. Oxford

Soil Taxonomic Edition - twelfth edition

Moisture Class - ustic

Moisture SUBClass - typic

Dynamic Soil Properties:

Pedoderm Loose Cover Indicator - no

Hydric: no

Field Measured Properties: 44 percent of Control section clay and 0 percent of Control section CF

SITE

Parent Material: clayey loess

Landscape: upland

Landform: plain

Geomorphic Component Flats: talf

Hill Slope Profile: shoulder

Slope Complexity: complex

Slope Shape Across: linear

Slope Shape Down: convex

Drainage Class: well

Flooding: none flooding

Ponding: none ponding

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 11/27/2017 (actual site observation date)

Data Collector: A. OXFORD; M. KUYKENDALL

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

Current Weather - sunny

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
mollic epipedon argillic horizon secondary carbonates redox depletions with chroma 2 or less redox concentrations	0—66 5—66 66—148 92—200 92—200	—- —- —- —- —-

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	—	—	600	—	30	—	—	—	—	—	—	—	—	—	—	—	—	—	—

Ap—0 to 5 centimeters (0.0 to 2.0 inches);, black (10YR 2/1), moist; silty clay loam; 4 percent sand; 66 percent silt; 30 percent clay; moderate fine granular structure; soft, very friable, moderately sticky, moderately plastic; common very fine roots throughout and many fine roots throughout; common very fine and few medium dendritic tubular and many fine pores; fragments; noneffervescent, by hcl, 1n; neutral, pH 6.9, pH meter; abrupt smooth boundary. Lab sample # 18N01123; observed in pit, large or quarry

Bt1—5 to 19 centimeters (2.0 to 7.5 inches);, black (10YR 2/1), moist; silty clay; 4 percent sand; 54 percent silt; 42 percent clay; moderate medium subangular blocky structure; very hard, firm, very sticky, very plastic; few medium roots throughout and few fine roots throughout; common fine dendritic tubular pores; 5 percent faint clay films on all faces of peds; fragments; noneffervescent, by hcl, 1n; slightly acid, pH 6.5, pH meter; clear smooth boundary. Lab sample # 18N01124; observed in pit, large or quarry

Bt2—19 to 66 centimeters (7.5 to 26.0 inches);, very dark grayish brown (10YR 3/2), moist; silty clay; 4 percent sand; 50 percent silt; 46 percent clay; weak medium prismatic parts to moderate medium subangular blocky structure; slightly hard, friable, very sticky, very plastic; few very fine roots throughout and few fine roots throughout; few very fine dendritic tubular and few medium dendritic tubular and few fine dendritic tubular pores; 30 percent prominent clay films on all faces of peds; fragments; noneffervescent, by hcl, 1n; neutral, pH 7.1, pH meter; clear smooth boundary. Lab sample # 18N01125; observed in pit, large or quarry

Btk1—66 to 92 centimeters (26.0 to 36.2 inches);, dark grayish brown (2.5Y 4/2), moist; silty clay; 4 percent sand; 48 percent silt; 48 percent clay; moderate medium prismatic parts to moderate medium subangular blocky structure; hard, friable, very sticky, very plastic; few very fine roots throughout and few fine roots throughout; common very fine dendritic tubular and few fine dendritic tubular pores; 30 percent prominent clay films on all faces of peds; 15 percent medium distinct irregular extremely weakly coherent cemented carbonate masses with clear boundaries in matrix; fragments; strong effervescence, by hcl, 1n; slightly alkaline, pH 7.5, pH meter; clear smooth boundary. Lab sample # 18N01126; observed in pit, large or quarry

Btk2—92 to 127 centimeters (36.2 to 50.0 inches);, dark grayish brown (2.5Y 4/2), moist; silty clay; 4 percent sand; 54 percent silt; 42 percent clay; moderate medium subangular blocky structure; hard, friable, very sticky, very plastic; few very fine roots throughout and few fine roots throughout; many very fine dendritic tubular and few fine dendritic tubular pores; 10 percent prominent clay films on all faces of peds; 2 percent fine faint irregular extremely weakly coherent cemented dark gray (10YR 4/1) masses of reduced iron with clear boundaries in matrix and 2 percent fine faint irregular extremely weakly coherent cemented dark yellowish brown (10YR 4/4) masses of oxidized iron with clear boundaries in matrix; 10 percent medium prominent irregular extremely weakly coherent cemented carbonate masses with clear boundaries in matrix; fragments; strong effervescence, by hcl, 1n; slightly alkaline, pH 7.8, pH meter; clear smooth boundary. Lab sample # 18N01127; observed in pit, large or quarry

Bk—127 to 148 centimeters (50.0 to 58.3 inches);, dark grayish brown (2.5Y 4/2), moist; silty clay loam; 4 percent sand; 58 percent silt; 38 percent clay; weak medium angular blocky structure; slightly hard, friable, very sticky, very plastic; few very fine roots throughout; many very fine dendritic tubular and few fine dendritic tubular pores; 2 percent medium faint irregular extremely weakly coherent cemented dark gray (10YR 4/1) masses of reduced iron with clear boundaries in matrix and 2 percent fine faint irregular extremely weakly coherent cemented dark yellowish brown (10YR 4/4) masses of oxidized iron with clear boundaries in matrix; 2 percent medium distinct irregular extremely weakly coherent cemented carbonate masses with clear boundaries in matrix; fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 7.9, pH meter; gradual smooth boundary. Lab sample # 18N01128; observed in pit, large or quarry

C—148 to 200 centimeters (58.3 to 78.7 inches);, light olive brown (2.5Y 5/3), moist; silty clay loam; 4 percent sand; 58 percent silt; 38 percent clay; structureless massive; slightly hard, friable, very sticky, very plastic; few very fine roots throughout; many very fine dendritic tubular and common fine dendritic tubular pores; 5 percent fine faint irregular extremely weakly coherent cemented dark yellowish brown (10YR 4/4) masses of oxidized iron with diffuse boundaries in matrix surrounding redox depletions and 20 percent medium faint irregular extremely weakly coherent cemented dark gray (10YR 4/1) masses of reduced iron with clear boundaries in matrix; carbonate, finely disseminated throughout; fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 7.9, pH meter. Lab sample # 18N01129; observed in pit, large or quarry