IDENTIFIERS

Current Taxon Name (Soil Name): Millboro

OSD

Series Extent

User Site ID: S2015SD085001

User Pedon ID: S2015SD085001

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - KSSL

Lab Pedon # - 16N0185

NCSS Pedon Lab Data NASIS Record ID - 87582

Print Date: 5/29/2024

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: 43.8775028

Std. Longitude: -100.0079111

Datum: WGS84

Township: 105N

Range: 77W

Section: 24

PLSS Details: SE 1/4; 670 feet West and 415 feet north of the SE corner

Location Description: Pedon is located 2 miles east and 1.5 miles south of the town of Presho, SD.

Map Unit: MmB—Millboro silty clay, 3 to 6 percent slopes

State: South Dakota

County: SD085—Lyman

MLRA: 63A—Northern Rolling Pierre Shale Plains

Non-MLRA Soil Survey Area: SD085—Lyman County, South Dakota

7.5 Minute USGS Quad: 43100-H1—Presho, South Dakota

PEDON

Describers Name: A. Oxford; N. Jones; R. Chavez

Current Taxonomic Class: Very-fine, smectitic, mesic Typic Haplusterts

Current Taxon Kind: series

Pedon Type: taxadjunct to the series

Pedon Purpose: laboratory sampling site

Pedon Record Orgin: NASIS

Sampled As Information:

Soil Name - Millboro

Taxonomic Class - Very-fine, smectitic, mesic Typic Haplusterts

Taxon Kind - series

PSC - 17 to 30 cm.

Classificaton Date - 9/10/2015

Classifier - A. Oxford

Soil Taxonomic Edition - twelfth edition

Moisture Class - ustic

Moisture SUBClass - typic

Dynamic Soil Properties:

Erosion Class - 1

Pedoderm Loose Cover Indicator - no

Pedon Vegetation and Crop Cover Information:

Range Veg. Canopy Type Dominant - perennial grass

Range Veg. Canopy Type Secondary - perennial forbs or herbaceous

Hydric: no

SITE

Parent Material: clayey alluvium derived from shale

Landscape: upland

Landform: plain

Geomorphic Component Hills: interfluve

Hill Slope Profile: backslope

Slope Complexity: simple

Slope Shape Across: linear

Slope Shape Down: linear

Drainage Class: well

Flooding: none flooding

Ponding: none ponding

Surface Fragments:

Benchmark Soil?: yes

VEGETATION

SITE OBSERVATION

Observation Date: 9/2/2015 (actual site observation date)

Data Collector: A. Oxford; N. Jones; R. Chavez

Surface Cover Properties:

Site Obs. Cover Kind 1 - grass/herbaceous cover

Site Obs. Cover Kind 2 - rangeland, grassland

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Pedon Restrictions
Kind	Hardness	Restriction Depth L-H	Restriction Thickness L-RV-H
		cm
bedrock, paralithic	weakly coherent	152 - 200	- 48 -

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
mollic epipedon argillic horizon slickensides secondary carbonates gypsum accumulations salt accumulations	0—30 17—30 30—152 30—152 92—152 92—152	—30— —13— —122— —122— —60— —60—

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	125	—	—	—	304	—	—	—	—	—	—	—	—	—	—	—	—	—	—

A1—0 to 10 centimeters (0.0 to 3.9 inches); very dark gray (10YR 3/1), black (10YR 2/1), moist; silty clay; 50 percent clay; moderate fine subangular blocky structure; hard, firm, slightly sticky, very plastic; common (3.0) very fine roots throughout and common (2.0) medium roots throughout and common (3.0) fine roots throughout; common (3.0) very fine vesicular and common (2.0) medium vesicular and common (3.0) fine vesicular pores; fragments; noneffervescent, by hcl, 1n; neutral, pH 6.6, pH indicator solutions; clear smooth boundary. Lab sample # 16N00524; moist when described; observed in pit, large or quarry

A2—10 to 17 centimeters (3.9 to 6.7 inches);, very dark gray (10YR 3/1), moist; clay; 60 percent clay; weak medium subangular blocky structure; very rigid, very firm, slightly sticky, very plastic; few (1.0) very fine roots throughout and common (2.0) fine roots throughout; few (1.0) very fine vesicular and common (2.0) fine vesicular pores; 10 irreversible trans-horizon cracks per meter at a depth of 7 cm with a width of 1 cm that extend above the horizon; fragments; noneffervescent, by hcl, 1n; slightly alkaline, pH 7.5, pH indicator solutions; clear wavy boundary. Lab sample # 16N00525; moist when described; observed in pit, large or quarry

Bt—17 to 30 centimeters (6.7 to 11.8 inches);, very dark grayish brown (2.5Y 3/2), moist; clay; 65 percent clay; strong coarse prismatic structure; hard, firm, slightly sticky, very plastic; few (1.0) very fine roots throughout and few (1.0) fine roots throughout; few (1.0) very fine vesicular and few (1.0) fine vesicular pores; 10 irreversible trans-horizon cracks per meter at a depth of 13 cm with a width of 1 cm that extend below the horizon; 75 percent prominent clay films on all faces of peds; fragments; strong effervescence, by hcl, 1n; slightly alkaline, pH 7.5, pH indicator solutions; clear wavy boundary. Lab sample # 16N00526; moist when described; observed in pit, large or quarry. continuous - phpvsfiid 1440076; continuous - phpvsfiid 1440076

Bkss1—30 to 71 centimeters (11.8 to 28.0 inches);, dark grayish brown (2.5Y 4/2), moist; clay; 70 percent clay; moderate coarse prismatic structure; extremely hard, extremely firm, slightly sticky, very plastic; common (2.0) very fine roots throughout and common (2.0) fine roots throughout; common (2.0) very fine dendritic tubular and common (2.0) fine dendritic tubular pores; 10 percent distinct slickensides (pedogenic) on top faces of peds; 15 percent coarse prominent irregular weakly coherent cemented carbonate masses with sharp boundaries in matrix; fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.0, pH indicator solutions; clear smooth boundary. Lab sample # 16N00527; moist when described; observed in pit, large or quarry. discontinuous - phpvsfiid 1440077; discontinuous - phpvsfiid 1440077

Bkss2—71 to 92 centimeters (28.0 to 36.2 inches);, very dark grayish brown (2.5Y 3/2), moist; clay; 70 percent clay; weak coarse angular blocky structure; extremely hard, slightly rigid, slightly sticky, very plastic; few (1.0) very fine roots throughout and few (1.0) fine roots throughout; few (1.0) very fine dendritic tubular and few (1.0) fine dendritic tubular pores; 5 percent distinct slickensides (pedogenic) on top faces of peds; 2 percent medium distinct irregular weakly coherent cemented carbonate masses with sharp boundaries in matrix; fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.0, pH indicator solutions; clear smooth boundary. Lab sample # 16N00528; moist when described; observed in pit, large or quarry. discontinuous - phpvsfiid 1440078; discontinuous - phpvsfiid 1440078

BCkssyz—92 to 152 centimeters (36.2 to 59.8 inches);, black (5Y 2.5/1), moist; clay; 70 percent clay; weak coarse angular blocky structure; extremely hard, slightly rigid, slightly sticky, very plastic; few (1.0) very fine roots throughout; few (1.0) very fine dendritic tubular pores; 5 percent distinct slickensides (pedogenic) on top faces of peds; 3 percent fine distinct cylindrical weakly coherent cemented gypsum crystals, unspecified with clear boundaries in matrix and 6 percent medium prominent irregular weakly coherent cemented carbonate masses with sharp boundaries in matrix and 6 percent medium prominent irregular weakly coherent cemented salt masses with sharp boundaries in matrix; fragments; slight effervescence, by hcl, 1n; moderately alkaline, pH 8.0, pH indicator solutions; abrupt smooth boundary. Lab sample # 16N00529; moist when described; observed in pit, large or quarry. discontinuous - phpvsfiid 1440079; discontinuous - phpvsfiid 1440079

Cr—152 to 200 centimeters (59.8 to 78.7 inches); bedrock; fragments; slightly alkaline, pH 7.5, pH indicator solutions. Lab sample # 16N00530; observed in pit, large or quarry