IDENTIFIERS

  • Current Taxon Name (Soil Name): Twotop
  • OSD
  • Series Extent
  • User Site ID: S1958SD113004
  • User Pedon ID: S1958SD113004
  • Vegetation Plot ID: S1958SD113004
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A2432
  • NCSS Pedon Lab Data NASIS Record ID - 37128
  • Print Date: 11/11/2024

    • 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: 43.1766663
  • Std. Longitude: -102.8147202
  • Datum: WGS84
  • Township: 37N
  • Range: 46W
  • Section: 18
  • PLSS Details: 0.2 of a mile E of the gate and 0.15 of a mile N of the fence in the SW 1/4
  • State: South Dakota
  • County: SD113—Oglala Lakota
  • MLRA: 60A—Pierre Shale Plains
  • Non-MLRA Soil Survey Area: SD113—Shannon County, South Dakota

    • PEDON

  • Current Taxonomic Class: Very-fine, smectitic, mesic Typic Torrerts
  • Current Taxon Kind: series
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 4
  • Correlated Information:
  • Soil Name - Twotop
  • Classificaton Date - 7/23/2007
  • Moisture Class - aridic (torric)
  • Sampled As Information:
  • Soil Name - Orman
  • Classificaton Date - 8/1/1958
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landform: terrace
  • Slope Shape Down: linear
  • Drainage Class: moderately well
  • Surface Fragments: 0.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 8/1/1958 (actual site observation date)
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    PASM

    Pascopyrum smithii

    western wheatgrass

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    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

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    A1c—0 to 5 centimeters (0.0 to 2.0 inches); gray (2.5Y 5/1) and gray (2.5Y 5/1) crushed, very dark gray (2.5Y 3/1) and very dark gray (2.5Y 3/1) crushed, moist; silty clay loam; weak very fine platy parts to moderate very fine and fine subangular blocky structure; soft, friable; fragments; noneffervescent; gradual smooth boundary. Lab sample # 40A19038. Friable to firm moist, slightly hard dry in lower portion; quartz predominantly finely divided bleached; minerals primarily quartz; temperature 83 degrees F.
    ABcorA2c—5 to 18 centimeters (2.0 to 7.1 inches); gray (2.5Y 5/1), dark gray (2.5Y 4/1), moist; silty clay; weak medium prismatic parts to moderate and strong fine and medium subangular blocky structure; very hard, very firm; 0.5 fine pores; clay films on all faces of peds and dark gray (2.5Y 4/1), moist, coats on faces of peds and gray (2.5Y 5/1), dry, coats on faces of peds; fragments; slight effervescence; gradual smooth boundary. Lab sample # 40A19039. Structure or weak very coarse polygons; quartz predominantly finely divided bleached; minerals primarily quartz; temperature 80 degrees F.; continuous - phpvsfiid 185689; continuous - phpvsfiid 196090; continuous - phpvsfiid 196091; continuous - phpvsfiid 185689; continuous - phpvsfiid 196090; continuous - phpvsfiid 196091
    B21c—18 to 33 centimeters (7.1 to 13.0 inches); gray (2.5Y 5/1), dark gray (2.5Y 4/1), moist; clay; weak and moderate coarse prismatic parts to moderate fine and medium subangular blocky structure; very hard, very firm; 0.5 fine pores; dark gray (2.5Y 4/1), moist, coats on faces of peds and gray (2.5Y 5/1), dry, coats on faces of peds and clay films on all faces of peds; fragments; slight effervescence; gradual smooth boundary. Lab sample # 40A19040. Structure of weak very coarse polygons; quartz predominantly finely divided bleached; minerals primarily quartz; temperature 77 degrees F.; continuous - phpvsfiid 185690; continuous - phpvsfiid 185691; continuous - phpvsfiid 185692; continuous - phpvsfiid 185690; continuous - phpvsfiid 185691; continuous - phpvsfiid 185692
    B22c—33 to 46 centimeters (13.0 to 18.1 inches); gray (2.5Y 5/1), dark gray (2.5Y 4/1), moist; clay; moderate fine and medium subangular blocky structure; very hard, very firm; 0.5 fine pores; gray (2.5Y 5/1), dry, coats on faces of peds and clay films on all faces of peds; fragments; strong effervescence; gradual smooth boundary. Lab sample # 40A19041. Structure of weak very coarse polygons; quartz predominantly finely divided bleached; minerals primarily quartz with some feldspar and iron-manganese concentrations; temperature 77 degrees F.; continuous - phpvsfiid 185693; continuous - phpvsfiid 185694; continuous - phpvsfiid 185693; continuous - phpvsfiid 185694
    B3c—46 to 64 centimeters (18.1 to 25.2 inches); gray (5Y 5/1), olive gray (5Y 5/2), moist; clay; moderate fine and medium subangular blocky structure; very hard, very firm; 0.5 fine pores; dark gray (5Y 4/1), moist, coats on faces of peds and clay films on all faces of peds and 10 percent faint iron stains on rock fragments; fragments; strong effervescence; clear smooth boundary. Lab sample # 40A19042. Structure of weak very coarse polygons; some quartz finely divided bleached; minerals primarily quartz with some feldspar and iron-manganese concentrations; temperature 77 degrees F.; continuous - phpvsfiid 185695; continuous - phpvsfiid 185696; continuous - phpvsfiid 185695; continuous - phpvsfiid 185696
    B3cacs1—64 to 97 centimeters (25.2 to 38.2 inches); light olive gray (5Y 6/2), olive gray (5Y 5/2), moist; clay; weak and moderate fine and medium subangular blocky structure; very hard, very firm; clay films on all faces of peds and 10 percent faint iron stains on rock fragments; 1 percent fine lime masses and 1 percent fine salt masses and 1 percent fine gypsum crystals, unspecified; fragments; strong effervescence; clear smooth boundary. Lab sample # 40A19043. Very weak coarse polygon structure; some quartz finely divided bleached; minerals primarily quartz with some feldspar and iron-manganese concentrations; temperature 72 degrees F.; patchy - phpvsfiid 185698; patchy - phpvsfiid 185698
    B3cacs2—97 to 112 centimeters (38.2 to 44.1 inches); gray (2.5Y 5/1), dark gray (2.5Y 4/1), moist; clay; 3 percent olive gray (5Y 5/2) medium distinct and 3 percent light olive gray (5Y 6/2) medium distinct mottles; weak fine and medium subangular blocky structure; very hard, very firm; clay films on all faces of peds and 10 percent faint iron stains on rock fragments; 1 percent fine lime masses and 3 percent fine gypsum crystals, unspecified; fragments; slight effervescence; clear smooth boundary. Lab sample # 40A19044. Some quartz finely divided bleached; minerals primarily quartz with some feldspar and iron-manganese concentrations; temperature 68 degrees F.; patchy - phpvsfiid 185700; patchy - phpvsfiid 185700
    (C-Dr)ca—112 to 145 centimeters (44.1 to 57.1 inches); light brownish gray (2.5Y 6/2), light olive brown (2.5Y 5/3), moist; clay; massive; hard, very firm; clay films on all faces of peds and 10 percent faint iron stains on rock fragments and 21 percent clay films on rock fragments; 1 percent fine lime masses and 1 percent fine gypsum crystals, unspecified; fragments; slight effervescence. Lab sample # 40A19045. Partially weathered weak fine and medium bedded shale structure; some quartz finely divided bleached; minerals primarily quartz with some feldspar and iron-manganese concentrations; temperature 68 degrees F.; patchy - phpvsfiid 185702; patchy - phpvsfiid 185703; patchy - phpvsfiid 185702; patchy - phpvsfiid 185703