IDENTIFIERS

  • Current Taxon Name (Soil Name): Eapa
  • OSD
  • Series Extent
  • User Site ID: S2000MT017001
  • User Pedon ID: S2000MT017001
  • Vegetation Plot ID: S2000MT017001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 00P1145
  • NCSS Pedon Lab Data NASIS Record ID - 12641
  • 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: 46.3060837
  • Std. Longitude: -105.9767532
  • Datum: WGS84
  • Location Description: 6 miles west of Miles City, Montana, approximately 2 miles south of interstate 94 on property owned by ARS Fort Keogh Livestock and Range Research Lab. Near what is locally known as the Radar Station abandoned by USAF.
  • State: Montana
  • County: MT017—Custer
  • MLRA: 58A—Northern Rolling High Plains, Northern Part
  • Non-MLRA Soil Survey Area: MT017—Custer County Area, Montana
  • 7.5 Minute USGS Quad: 46105-C8—Lignite Creek, Montana
  • PEDON

  • Describers Name: Steve VanFossen, Bill Drummond, Jerry Setera
  • Current Taxonomic Class: Fine-loamy, mixed, frigid Aridic Argiborolls
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 1
  • Sampled As Information:
  • Soil Name - Eapa
  • Taxonomic Class - Fine-loamy, mixed, frigid Aridic Argiborolls
  • Classificaton Date - 6/28/2000
  • Moisture Class - aridic (torric)
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


  • SITE

  • Landscape: plains
  • Landform: alluvial flat
  • Geomorphic Component Hills: interfluve
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no
  • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/28/2000 (actual site observation date)
  • 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
  • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    AGSM

    ARLO

    BOGR2

    CAFI

    HECOC8

    PASM

    STCO13

    Agropyron smithii

    Arenaria longipedunculata

    Bouteloua gracilis

    Carex filifolia

    Hesperostipa comata ssp. comata

    Pascopyrum smithii

    Stethoma comata

    longstem sandwort

    blue grama

    threadleaf sedge

    needle and thread

    western wheatgrass

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

    mollic epipedon

    argillic horizon

    0—25

    8—41

    —-

    —-

    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

    851

    368

    Miles City Airport

    A—0 to 8 centimeters (0.0 to 3.1 inches); dark brown (10YR 3/3), brown (10YR 5/3), dry; loam; weak fine granular structure; soft, very friable, slightly sticky, slightly plastic; 3.0 very fine and fine roots throughout; 3.0 very fine and fine high-continuity interstitial pores; fragments; clear smooth boundary. Lab sample # 00P06575. estimated 20 percent noncarbonate clay; 3 mm crust on surface.
    Bt1—8 to 25 centimeters (3.1 to 9.8 inches); dark brown (10YR 3/3), brown (10YR 5/3), dry; clay loam; moderate fine and medium prismatic parts to moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; 3.0 very fine and fine roots throughout and 3.0 medium roots between peds; 3.0 fine high-continuity tubular pores; 75 percent distinct clay films on faces of peds and in pores; fragments; gradual smooth boundary. Lab sample # 00P06576. estimated 28 percent noncarbonate clay.; continuous - phpvsfiid 199253; continuous - phpvsfiid 199253
    Bt2—25 to 42 centimeters (9.8 to 16.5 inches); dark grayish brown (10YR 4/2), brown (10YR 5/3), dry; loam; moderate medium prismatic parts to moderate medium and coarse subangular blocky structure; hard when dry, firm, slightly sticky, slightly plastic; 3.0 very fine roots throughout and 3.0 medium roots between peds; 3.0 very fine and fine high-continuity tubular pores; 30 percent faint clay films on faces of peds and in pores; fragments; gradual smooth boundary. Lab sample # 00P06577. estimated 25 percent noncarbonate clay.; discontinuous - phpvsfiid 199254; discontinuous - phpvsfiid 199254
    Bk1—42 to 63 centimeters (16.5 to 24.8 inches); light olive brown (2.5Y 5/3), light yellowish brown (2.5Y 6/3), dry; loam; weak coarse prismatic parts to moderate medium and coarse subangular blocky structure; hard when dry, firm, slightly sticky, slightly plastic; 3.0 very fine roots throughout; 3.0 very fine low-continuity tubular and 3.0 medium moderate-continuity tubular pores; 3 percent medium irregular carbonate masses throughout; fragments; violent effervescence, by hcl, 1n; gradual smooth boundary. Lab sample # 00P06578. estimated 25 percent carbonate and noncarbonate clay.
    Bk2—63 to 93 centimeters (24.8 to 36.6 inches); light olive brown (2.5Y 5/3), light yellowish brown (2.5Y 6/3), dry; loam; weak coarse prismatic parts to weak coarse subangular blocky structure; hard when dry, friable, slightly sticky, slightly plastic; 3.0 very fine roots throughout; 3.0 very fine and fine low-continuity tubular pores; 1 percent medium irregular carbonate masses throughout; fragments; violent effervescence, by hcl, 1n; diffuse wavy boundary. Lab sample # 00P06579. estimated 20 percent carbonate and noncarbonate clay.
    Bk3—93 to 145 centimeters (36.6 to 57.1 inches); light olive brown (2.5Y 5/3), light yellowish brown (2.5Y 6/4), dry; fine sandy loam; weak very coarse prismatic structure; slightly hard, firm, nonsticky, slightly plastic; 3.0 fine low-continuity tubular pores; 1 percent fine irregular carbonate masses throughout; fragments; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 00P06580. estimated 12 percent carbonate and noncarbonate clay.
    2C—145 to 170 centimeters (57.1 to 66.9 inches); olive brown (2.5Y 4/4), light yellowish brown (2.5Y 6/4), dry; fine sandy loam; massive; slightly hard, firm, nonsticky, nonplastic; 3.0 fine and medium low-continuity tubular pores; 5 percent fine and medium irregular carbonate masses throughout and 3 percent medium irregular strongly coherent cemented carbonate nodules around rock fragments; 5 percent by volume rounded 2-39-75 millimeter mixed fragments; violent effervescence, by hcl, 1n; clear wavy boundary. Lab sample # 00P06581. estimated 8 percent carbonate and noncarbonate clay.
    2Ck—170 to 193 centimeters (66.9 to 76.0 inches); light yellowish brown (2.5Y 6/3), pale yellow (2.5Y 7/3), dry; loam; massive; slightly hard, firm, slightly sticky, slightly plastic; 3.0 fine low-continuity interstitial and tubular pores; 3 percent coarse and very coarse irregular carbonate masses throughout; fragments; violent effervescence, by hcl, 1n. Lab sample # 00P06582. estimated 15 percent carbonate and noncarbonate clay.