IDENTIFIERS

Current Taxon Name (Soil Name): Tonti

OSD

Series Extent

User Site ID: 2006MO035011M

User Pedon ID: 2006MO035011M

Vegetation Plot ID: 2006MO035011

Lab Information:

Certified Lab Pedon Description - yes

Lab Source ID - MCL

Lab Pedon # - M0603511

NCSS Pedon Lab Data NASIS Record ID - 25263

User Project ID: 2021-26NCSPR013

Project Name: MLRA 116A - Mark Twain National Forest Update

Print Date: 12/5/2025

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: 36.8881139

Std. Longitude: -91.1951889

Datum: WGS84

Township: T26N

Range: R2W

Section: 29

PLSS Details: 2411 feet W and 1880 feet N of the SE corner

Map Unit: 73157—Captina silt loam, 3 to 8 percent slopes

State: Missouri

County: MO035—Carter

MLRA: 116A—Ozark Highland

MLRA Soil Survey Area: NC-SPM—Springfield, Missouri

Non-MLRA Soil Survey Area: MO601—Mark Twain National Forest Area, MissouriMO035—Carter County, Missouri

7.5 Minute USGS Quad: 36091-H2—Fremont, Missouri

PEDON

Describers Name: Keith Knelle, Michael Wyatt, Leon Thompson, Dan Childress

Current Taxonomic Class: Fine-loamy, siliceous, active, mesic Typic Fragiudults

Current Taxon Kind: taxadjunct

Pedon Type: classifies to current taxon name, full description

Pedon Purpose: laboratory sampling site

Pedon Record Orgin: Missouri Pedon

Pedon #: 11

Correlated Information:

Soil Name - Tonti

PSC - 30 to 58 cm.

Classificaton Date - 2/1/2012

Classifier - J.R. Perkins

Soil Taxonomic Edition - twelfth edition

Moisture Class - udic

Moisture Subclass - typic

Sampled As Information:

Soil Name - Captina

Taxonomic Class - Fine-silty, siliceous, active, mesic Typic Fragiudults

Taxon Kind - series

PSC - 30 to 58 cm.

Classificaton Date - 5/31/2006

Soil Taxonomic Edition - twelfth edition

Moisture Class - udic

Moisture SUBClass - typic

Dynamic Soil Properties:

Erosion Class - 1

Pedoderm Loose Cover Indicator - no

Hydric: no

Certification Status: certified

QC Status: level 1

Field Measured Properties: 25.1 percent of pscs clay and 25.4 percent of pscs sand and 15.3 percent of pscs gravel and 0.45 ratio of cec to clay ratio

SITE

Parent Material: Holocene Stage slope alluvium derived from mixed over Roubidoux Formation gravelly pedisediment derived from limestone and sandstone over residuum

Landscape: hills

Landform: ridge

Geomorphic Component Hills: interfluve

Hill Slope Profile: summit

Slope Position: upper third

Slope Complexity: simple

Slope Shape Across: convex

Slope Shape Down: linear

Runoff: medium

Drainage Class: moderately well

Flooding: none flooding

Ponding: none ponding

Geology: Roubidoux Formation formation.

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 5/31/2006 (actual site observation date)

Air Photo ID: 8/7/2006

Surface Water Kind: none observed

Surface Cover Properties:

Site Obs. Cover Kind 1 - tree cover

Site Obs. Cover Kind 2 - hardwoods

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Site Erosion Accelerated: water erosion sheet

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
PIEC2 QUCO2 CORNU CARYA SAAL5 QUAL VITIS VACCI RHUS PAQU2	Pinus echinata Quercus coccinea Cornus Carya Sassafras albidum Quercus alba Vitis Vaccinium Rhus Parthenocissus quinquefolia	shortleaf pine scarlet oak dogwood hybrid hickory sassafras white oak grape blueberry sumac Virginia creeper	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —

Pedon Restrictions
Kind	Hardness	Restriction Depth L-H	Restriction Thickness L-RV-H
		cm
fragipan	—	58 - 127	- 69 -

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon albic horizon argillic horizon fragipan lithologic discontinuity redox depletions with chroma 2 or less lithologic discontinuity	0—8 8—18 30—203 58—127 58— 79—94 127—	—8— —10— —173— —69— —- —15— —-

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
5	—	—	292	—	191	—	—	—	—	—	—	—	—	—	—	—	—	—	—

A—0 to 8 centimeters (0.0 to 3.1 inches); dark grayish brown (10YR 4/2) broken face silt loam; weak fine granular structure; very friable; 10.0 very fine roots throughout and 3.0 medium roots throughout and 10.0 fine roots throughout and 3.0 coarse roots throughout; 0.5 very fine interstitial and 0.5 medium interstitial and 0.5 fine interstitial pores; 1 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments; clear smooth boundary. Lab sample # MU000952; observed in pit, small

E—8 to 18 centimeters (3.1 to 7.1 inches); pale brown (10YR 6/3) broken face silt loam; moderate medium subangular blocky structure; very friable; 10.0 medium roots throughout and 10.0 fine roots throughout and 10.0 coarse roots throughout; 3.0 medium tubular and 3.0 fine tubular pores; 35 percent distinct dark grayish brown (10YR 4/2), moist, organic stains on all faces of peds; 1 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments; clear wavy boundary. Lab sample # MU000953; observed in pit, small

EB—18 to 30 centimeters (7.1 to 11.8 inches); 60 percent pale brown (10YR 6/3) broken face and 40 percent yellowish brown (10YR 5/4) broken face silt loam; moderate medium subangular blocky structure; very friable; 3.0 medium roots throughout and 3.0 fine roots throughout and 3.0 coarse roots throughout; 3.0 medium tubular and 3.0 fine tubular and 0.5 coarse tubular pores; 12 percent distinct dark yellowish brown (10YR 4/6), moist, clay films on all faces of peds; 2 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments; clear smooth boundary.; observed in pit, small

Bt1—30 to 43 centimeters (11.8 to 16.9 inches); strong brown (7.5YR 4/6) broken face silt loam; moderate fine and medium subangular blocky structure; firm; 0.5 medium roots throughout and 0.5 fine roots throughout and 0.5 coarse roots throughout; 10.0 very fine tubular and 10.0 medium tubular and 10.0 fine tubular and 3.0 coarse tubular pores; 12 percent prominent pale brown (10YR 6/3), moist, silt coats on all faces of peds and 35 percent faint strong brown (7.5YR 4/6), moist, clay films on all faces of peds; 10 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments; gradual wavy boundary. Lab sample # MU000955; observed in pit, small

Bt2—43 to 58 centimeters (16.9 to 22.8 inches); strong brown (7.5YR 4/6) broken face gravelly loam; moderate fine subangular blocky, and moderate medium subangular blocky structure; firm; 0.5 medium roots throughout and 0.5 fine roots throughout; 0.5 very fine tubular and 0.5 fine tubular pores; 35 percent faint brown (7.5YR 4/4), moist, clay films on all faces of peds; 20 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments; abrupt smooth boundary. Lab sample # MU000956; observed in pit, small

2Btx1—58 to 79 centimeters (22.8 to 31.1 inches); 70 percent light brownish gray (10YR 6/2) broken face and 30 percent yellowish brown (10YR 5/8) broken face extremely gravelly loam; weak very coarse prismatic structure; extremely firm; brittle; 0.5 medium roots throughout and 0.5 fine roots throughout; 0.5 very fine vesicular and 0.5 very fine tubular and 0.5 fine vesicular and 0.5 fine tubular pores; 35 percent distinct dark yellowish brown (10YR 4/6), moist, clay films on all faces of peds and 70 percent prominent pale brown (10YR 6/3), moist, silt coats on all faces of peds; 1 percent medium faint irregular noncoherent cemented gray (10YR 6/1), moist, iron depletions with clear boundaries in matrix; 5 percent by volume nonflat subangular strongly coherent cemented 75-?-250 millimeter sandstone, unspecified fragments and 55 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter limestone, cherty fragments; gradual wavy boundary. Lab sample # MU000957; observed in pit, small

2Btx2—79 to 94 centimeters (31.1 to 37.0 inches); light brownish gray (10YR 6/2) broken face extremely gravelly loam; weak very coarse prismatic structure; extremely firm; brittle; 0.5 very fine roots throughout and 0.5 fine roots throughout; 0.5 very fine vesicular and 0.5 very fine tubular and 0.5 fine vesicular and 0.5 fine tubular pores; 12 percent prominent brown (7.5YR 5/4), moist, clay films on all faces of peds and 70 percent prominent pale brown (10YR 6/3), moist, silt coats on all faces of peds; 1 percent medium faint irregular noncoherent cemented gray (10YR 6/1), moist, iron depletions with clear boundaries in matrix; 15 percent by volume nonflat subangular strongly coherent cemented 75-?-250 millimeter sandstone, unspecified fragments and 45 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter limestone, cherty fragments; gradual wavy boundary. Lab sample # MU000958; observed in pit, small

2Btx3—94 to 127 centimeters (37.0 to 50.0 inches); 60 percent strong brown (7.5YR 5/8) broken face and 40 percent light brown (7.5YR 6/4) broken face extremely gravelly loam; weak very coarse prismatic structure; extremely firm; brittle; 0.5 medium roots throughout and 0.5 fine roots throughout; 0.5 very fine vesicular and 0.5 fine vesicular and 0.5 fine tubular pores; 35 percent prominent red (2.5YR 4/8), moist, clay films on all faces of peds; 25 percent by volume nonflat subangular strongly coherent cemented 75-?-250 millimeter sandstone, unspecified fragments and 35 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter limestone, cherty fragments; clear wavy boundary. Lab sample # MU000959; observed in pit, small

3Bt1—127 to 163 centimeters (50.0 to 64.2 inches); 60 percent light brown (7.5YR 6/4) broken face and 40 percent strong brown (7.5YR 5/6) broken face very gravelly clay loam; moderate fine subangular blocky, and moderate medium subangular blocky structure; firm; 0.5 very fine roots throughout; 0.5 medium vesicular and 0.5 fine vesicular pores; 35 percent prominent red (2.5YR 4/8), moist, clay films on all faces of peds and 35 percent prominent dark reddish brown (5YR 3/4), moist, clay films on all faces of peds and 35 percent prominent brown (7.5YR 4/4), moist, clay films on all faces of peds; 20 percent by volume nonflat subangular strongly coherent cemented 75-?-250 millimeter sandstone, unspecified fragments and 25 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter sandstone, unspecified fragments; gradual wavy boundary. Lab sample # MU000960; observed in pit, small

3Bt2—163 to 203 centimeters (64.2 to 79.9 inches); 70 percent yellowish red (5YR 5/6) broken face and 30 percent red (2.5YR 4/8) broken face very gravelly clay loam; moderate fine subangular blocky, and moderate medium subangular blocky structure; firm; 0.5 medium vesicular and 0.5 fine vesicular pores; 35 percent prominent strong brown (7.5YR 4/6), moist, clay films on all faces of peds and 35 percent faint red (2.5YR 4/8), moist, clay films on all faces of peds; 20 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter sandstone, unspecified fragments and 30 percent by volume nonflat subangular strongly coherent cemented 75-?-250 millimeter sandstone, unspecified fragments. Lab sample # MU000961; observed in pit, small