IDENTIFIERS

  • Current Taxon Name (Soil Name): Union
  • OSD
  • Series Extent
  • User Site ID: 1999MO073023M
  • User Pedon ID: 1999MO073023
  • Vegetation Plot ID: 1999MO073023
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - MCL
  • Lab Pedon # - M9107301
  • Print Date: 2/16/2025

    • 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: 38.4226250
  • Std. Longitude: -91.4102750
  • Datum: WGS84
  • Township: T43N
  • Range: R4W
  • Section: 31
  • PLSS Details: 1300 feet W and 750 feet N of the SE corner
  • Location Description: 1,300 feet west and 750 feet north of the southeast corner of sec. 31, T. 43 N., R. 4 W.; USGS Rosebud quadrangle.
  • Map Unit: 73135—Union silt loam, 3 to 8 percent slopes
  • State: Missouri
  • County: MO073—Gasconade
  • MLRA: 116A—Ozark Highland
  • Non-MLRA Soil Survey Area: MO073—Gasconade County, Missouri
  • 7.5 Minute USGS Quad: 38091-D4—Rosebud, Missouri

    • PEDON

  • Describers Name: entered by BE
  • Current Taxonomic Class: Fine, mixed, active, mesic Oxyaquic Fragiudalfs
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Correlated Information:
  • Soil Name - Union (flagged as OSD)
  • PSC - 20 to 70 cm.
  • Classificaton Date - 3/4/2011
  • Classifier - J.R. Perkins
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Class - udic
  • Moisture Subclass - udic
  • Sampled As Information:
  • Soil Name - Union (flagged as OSD)
  • Taxonomic Class - Fine, active Oxyaquic Fragiudalfs
  • Taxon Kind - series
  • PSC - 20 to 70 cm.
  • Classificaton Date - 8/12/1999
  • Classifier - J.R. Perkin
  • Soil Taxonomic Edition - eleventh edition
  • Moisture SUBClass - udic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified


    • SITE

  • Parent Material: loess over fine-loamy pedisediment over gravelly pedisediment over residuum
  • Landscape: hills
  • Landform: interfluve
  • Geomorphic Component Hills: interfluve
  • Hill Slope Profile: summit
  • Slope Position: lower third
  • Slope Complexity: simple
  • Slope Shape Across: convex
  • Slope Shape Down: linear
  • Drainage Class: moderately well
  • Flooding: none flooding
  • Geology: Jefferson City Dolomite formation of the Ordovician group.
  • Surface Fragments:
  • Benchmark Soil?: yes

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 8/12/1999 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - pastureland, tame
  • 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

    Bt1

    Bt2

    Bt3

    Bt4

    2Btx1

    2Btx2

    3Bt5

    0

    20

    28

    43

    56

    71

    94

    127

    20

    28

    43

    56

    71

    94

    127

    152

    M910730101

    M910730102

    M910730103

    M910730104

    M910730105

    —

    M910730107

    M910730109

    —

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    —

    —

    —

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    14.1

    18.6

    33.7

    44.1

    43.4

    21.7

    16

    42.5

    0

    0

    0

    0

    0

    0

    0

    0

    81.4

    77.7

    63.5

    53

    52.8

    65

    53.4

    14.1

    48.3

    47.6

    40.9

    35.5

    33.7

    40.6

    31.7

    8.8

    33.2

    30.1

    22.6

    17.4

    19.1

    24.5

    21.7

    5.3

    4.5

    3.7

    2.8

    2.9

    3.8

    13.3

    30.5

    43.4

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    hydrometer

    0.5

    0.4

    0.3

    0.2

    0.2

    0.5

    5

    0.2

    0.9

    0.7

    0.5

    0.5

    0.3

    0.8

    3.6

    1.8

    0.8

    0.7

    0.6

    0.6

    0.7

    3.2

    6.5

    6.3

    1.3

    1.1

    0.8

    1.1

    1.9

    7.3

    12.8

    27.6

    1

    0.8

    0.6

    0.6

    0.8

    1.6

    2.6

    7.5

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    sil

    sil

    sicl

    sic

    sic

    sil

    sil

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    6.8

    7

    6.4

    4.7

    4.5

    4.7

    4.9

    5.8
    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

    Bt1

    Bt2

    Bt3

    Bt4

    2Btx1

    2Btx2

    3Bt5

    0

    20

    28

    43

    56

    71

    94

    127

    20

    28

    43

    56

    71

    94

    127

    152

    M910730101

    M910730102

    M910730103

    M910730104

    M910730105

    —

    M910730107

    M910730109

    6.3

    6.5

    6

    4.1

    4

    4

    4.1

    5.2

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    3.9

    11

    6.9

    20.8

    22.6

    12.7

    7.6

    4.3

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    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

    Bt1

    Bt2

    Bt3

    Bt4

    2Btx1

    2Btx2

    3Bt5

    0

    20

    28

    43

    56

    71

    94

    127

    20

    28

    43

    56

    71

    94

    127

    152

    M910730101

    M910730102

    M910730103

    M910730104

    M910730105

    —

    M910730107

    M910730109

    —

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    —

    —

    —

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    —

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    Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    LOAR10

    THUJA

    TRPR2

    Lolium arundinaceum

    Thuja

    Trifolium pratense

    tall fescue

    arborvitae

    red clover

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    Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    fragipan

    noncoherent

    71 - 127

    - 56 -

    Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    redox depletions with chroma 2 or less

    fragipan

    lithologic discontinuity

    lithologic discontinuity

    lithologic discontinuity

    0—20

    20—152

    56—127

    71—127

    71—94

    94—127

    127—152

    —20—

    —132—

    —71—

    —56—

    —23—

    —33—

    —25—
    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

    4

    —

    —

    270

    —

    300

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    Ap—0 to 20 centimeters (0.0 to 7.9 inches); brown (10YR 4/3), pale brown (10YR 6/3), dry; silt loam; 5 percent sand; 81 percent silt; 14 percent clay; weak fine granular structure; very friable; common (3.0) very fine roots and few (0.5) fine roots; fragments; neutral, pH 6.8, pH meter; clear smooth boundary. Lab sample # MU041068; observed in pit, small
    Bt1—20 to 28 centimeters (7.9 to 11.0 inches); yellowish brown (10YR 5/4) silt loam; 4 percent sand; 78 percent silt; 19 percent clay; moderate fine granular structure; friable; common (3.0) very fine roots; fragments; neutral, pH 7.0, pH meter; clear smooth boundary. Lab sample # MU041069; observed in pit, small
    Bt2—28 to 43 centimeters (11.0 to 16.9 inches); strong brown (7.5YR 4/6) silty clay loam; 3 percent sand; 64 percent silt; 34 percent clay; moderate fine subangular blocky structure; firm; common (3.0) very fine roots; 30 percent distinct clay films on faces of peds; fragments; slightly acid, pH 6.4, pH meter; gradual smooth boundary. Lab sample # MU041070; observed in pit, small
    Bt3—43 to 56 centimeters (16.9 to 22.0 inches); dark yellowish brown (10YR 4/4) silty clay; 3 percent sand; 53 percent silt; 44 percent clay; moderate fine subangular blocky structure; firm; common (3.0) very fine roots; 30 percent distinct silt coats on faces of peds and 60 percent prominent clay films on faces of peds; 10 percent fine distinct noncoherent cemented brown (7.5YR 4/4), moist, iron-manganese masses throughout; fragments; very strongly acid, pH 4.7, pH meter; clear smooth boundary. Lab sample # MU041071; observed in pit, small
    Bt4—56 to 71 centimeters (22.0 to 28.0 inches); dark yellowish brown (10YR 4/4) silty clay; 4 percent sand; 53 percent silt; 43 percent clay; moderate fine subangular blocky structure; firm; few (0.5) very fine roots; 30 percent prominent clay films on faces of peds; 30 percent fine distinct noncoherent cemented grayish brown (10YR 5/2), moist, iron depletions throughout; fragments; very strongly acid, pH 4.5, pH meter; gradual smooth boundary. Lab sample # MU041072; observed in pit, small
    2Btx1—71 to 94 centimeters (28.0 to 37.0 inches); dark yellowish brown (10YR 4/4) silt loam; 13 percent sand; 65 percent silt; 22 percent clay; weak very coarse prismatic parts to structureless massive; very firm; brittle; 0.5 very fine roots in cracks; few (0.5) fine low-continuity vesicular pores; 10 percent prominent clay films on faces of peds; 10 percent coarse distinct noncoherent cemented grayish brown (10YR 5/2), moist, iron depletions on vertical faces of peds; 5 percent by volume nonflat indurated 2-39-75 millimeter chert fragments; very strongly acid, pH 4.7, pH meter; gradual wavy boundary. Lab sample # MU041073; observed in pit, small. old classification (10YR 5/2) vertical streaks 1/2 inch wide on faces of 8-inch polygons; few prominent clay films within vertical streaks; weak very coarse prismatic structure with dense massive interiors; few very fine roots in vertical streaks.
    2Btx2—94 to 127 centimeters (37.0 to 50.0 inches); 51 percent brown (10YR 5/3) and 49 percent light brownish gray (10YR 6/2) extremely gravelly silt loam; 31 percent sand; 53 percent silt; 16 percent clay; weak very coarse prismatic parts to structureless massive; very firm; brittle; few (0.5) fine low-continuity vesicular pores; 10 percent distinct clay films on faces of peds; 5 percent by volume nonflat indurated 75-162-250 millimeter chert fragments and 75 percent by volume nonflat indurated 2-39-75 millimeter chert fragments; very strongly acid, pH 4.9, pH meter; gradual wavy boundary. Lab sample # MU041074; observed in pit, small
    3Bt5—127 to 152 centimeters (50.0 to 59.8 inches); 51 percent brown (7.5YR 5/4) and 49 percent red (2.5YR 4/8) very gravelly clay; 43 percent sand; 14 percent silt; 43 percent clay; weak very fine subangular blocky structure; firm; 30 percent distinct clay films on faces of peds; 40 percent by volume nonflat indurated 2-39-75 millimeter chert fragments; moderately acid, pH 5.8, pH meter. Lab sample # MU041076; observed in pit, small