IDENTIFIERS

  • Current Taxon Name (Soil Name): Richfield
  • OSD
  • Series Extent
  • User Site ID: S1994CO121001
  • User Pedon ID: 94CO121001
  • User Site Association ID: mlra72-benchmark lab pedons
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 95P0009
  • NCSS Pedon Lab Data NASIS Record ID - 67027
  • Print Date: 3/2/2025

    • 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: 39.9300537
  • Std. Longitude: -103.3290024
  • Datum: WGS84
  • State: Colorado
  • County: CO121—Washington
  • MLRA: 67—Central High Plains
  • Non-MLRA Soil Survey Area: CO121—Washington County, Colorado

    • PEDON

  • Describers Name: John Kimble, M.L. Petersen
  • 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 - Richfield
  • Taxonomic Class - Fine, montmorillonitic Aridic Argiustolls
  • PSC - 12 to 57 cm.
  • Classificaton Date - 8/30/1994
  • Moisture Class - aridic (torric)
  • Dynamic Soil Properties:
  • Erosion Class - 2
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: plains
  • Geomorphic Component Hills: nose slope
  • Hill Slope Profile: shoulder
  • Slope Shape Across: convex
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 8/30/1994 (actual site observation date)
  • Air Photo ID: Sheet 28
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: wind erosion
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    mollic epipedon

    argillic horizon

    0—40

    12—63

    —-

    —-
    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

    2000

    75

    1489

    —

    310

    380

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap1—0 to 7 centimeters (0.0 to 2.8 inches); grayish brown (10YR 5/2) exterior, very dark grayish brown (10YR 3/2) exterior, moist; silt loam; 22 percent clay; moderate fine granular structure; soft, very friable, slightly sticky, slightly plastic; low toughness; 7.0 very fine roots throughout and 5.0 medium roots throughout and 15.0 fine roots throughout; 8.0 very fine and fine high-continuity tubular and 4.0 very fine and fine moderate-continuity continuous tubular pores; fragments; noneffervescent, by hcl, unspecified; slightly alkaline, pH 7.4, hellige-truog; abrupt smooth boundary. Lab sample # 95P00058
    Ap2—7 to 12 centimeters (2.8 to 4.7 inches); grayish brown (10YR 5/2) exterior, very dark grayish brown (10YR 3/2) exterior, moist; silt loam; 25 percent clay; moderate fine and medium platy parts to weak very fine and fine granular structure; soft, very friable, slightly sticky, slightly plastic; low toughness; 10.0 very fine and fine roots throughout and 5.0 medium roots throughout and 0.5 coarse roots throughout; 4.0 very fine to medium low-continuity tubular and 5.0 very fine and fine low-continuity constricted tubular pores; fragments; very slight effervescence, by hcl, unspecified; neutral, pH 7.1, hellige-truog; abrupt smooth boundary. Lab sample # 95P00059
    Bt1—12 to 26 centimeters (4.7 to 10.2 inches); brown (10YR 5/3) exterior, dark brown (10YR 3/3) exterior, moist; silty clay loam; 37 percent clay; strong medium prismatic parts to strong fine and medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; medium toughness; 5.0 very fine and fine roots throughout and 2.0 medium roots throughout; 3.0 very fine and fine low-continuity tubular and 2.0 very fine low-continuity interstitial pores; 5 percent distinct clay films on faces of peds and in pores; fragments; noneffervescent, by hcl, unspecified; neutral, pH 7.3, hellige-truog; clear smooth boundary. Lab sample # 95P00060. discontinuous - phpvsfiid 181057; discontinuous - phpvsfiid 181057
    Bt2—26 to 40 centimeters (10.2 to 15.7 inches); brown (10YR 5/3) exterior, dark brown (10YR 3/3) exterior, moist; silty clay loam; 39 percent clay; moderate fine and medium prismatic parts to moderate fine subangular blocky structure; very hard, very firm, very sticky, very plastic; high toughness; 5.0 very fine roots throughout and 0.5 medium roots throughout and 12.0 fine roots throughout; 5.0 very fine and fine low-continuity tubular and 3.0 very fine moderate-continuity dendritic tubular pores; 7 percent distinct clay films on all faces of peds; 10 percent medium cylindrical noncoherent cemented carbonate masses between peds; fragments; slight effervescence, by hcl, unspecified; slightly alkaline, pH 7.8, hellige-truog; clear wavy boundary. Lab sample # 95P00061. discontinuous - phpvsfiid 181058; discontinuous - phpvsfiid 181058
    Btk—40 to 63 centimeters (15.7 to 24.8 inches); light brownish gray (10YR 6/2) exterior, brown (10YR 5/3) exterior, moist; silty clay loam; 28 percent clay; weak coarse prismatic parts to moderate fine and medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; medium toughness; 3.0 very fine roots throughout and 0.5 medium roots throughout and 7.0 fine roots throughout; 4.0 very fine and fine moderate-continuity tubular and 3.0 very fine moderate-continuity dendritic tubular pores; 2 percent faint clay films in root channels and/or pores and 20 percent distinct light gray (10YR 7/2), dry, carbonate coats; 1 percent fine irregular noncoherent cemented carbonate threads throughout; fragments; 4 percent krotovinas (volume percent); violent effervescence, by hcl, unspecified; moderately alkaline, pH 8.1, hellige-truog; clear wavy boundary. Lab sample # 95P00062. patchy - phpvsfiid 194089; patchy - phpvsfiid 194090; patchy - phpvsfiid 194089; patchy - phpvsfiid 194090
    BC1—63 to 92 centimeters (24.8 to 36.2 inches); light brownish gray (10YR 6/2) exterior, grayish brown (10YR 5/2) exterior, moist; silt loam; 24 percent clay; weak coarse prismatic structure; soft, very friable, slightly sticky, slightly plastic; low toughness; 5.0 very fine and fine roots throughout; 4.0 very fine and fine low-continuity tubular and 0.5 very fine low-continuity dendritic tubular and 5.0 very fine low-continuity vesicular pores; 1 percent fine irregular noncoherent cemented carbonate threads throughout; fragments; violent effervescence, by hcl, unspecified; moderately alkaline, pH 8.1, hellige-truog; gradual smooth boundary. Lab sample # 95P00063
    BC2—92 to 123 centimeters (36.2 to 48.4 inches); light brownish gray (10YR 6/2) exterior, brown (10YR 5/3) exterior, moist; very fine sandy loam; 18 percent clay; weak medium and coarse prismatic structure; soft, very friable, slightly sticky, slightly plastic; low toughness; 3.0 very fine and fine roots throughout; 6.0 very fine low-continuity tubular and 5.0 very fine low-continuity dendritic tubular and 0.5 very fine low-continuity vesicular pores; 1 percent fine irregular noncoherent cemented carbonate threads throughout; fragments; violent effervescence, by hcl, unspecified; moderately alkaline, pH 8.3, hellige-truog; gradual smooth boundary. Lab sample # 95P00064
    BC3—123 to 154 centimeters (48.4 to 60.6 inches); light brownish gray (10YR 6/2) exterior, brown (10YR 5/3) exterior, moist; very fine sandy loam; 16 percent clay; weak medium prismatic structure; soft, very friable, slightly sticky, slightly plastic; low toughness; 3.0 very fine and fine roots throughout; 2.0 very fine low-continuity tubular pores; 1 percent fine irregular noncoherent cemented carbonate threads throughout; fragments; violent effervescence, by hcl, unspecified; moderately alkaline, pH 8.4, hellige-truog; gradual wavy boundary. Lab sample # 95P00065
    C—154 to 200 centimeters (60.6 to 78.7 inches); pale brown (10YR 6/3) exterior, brown (10YR 5/3) exterior, moist; very fine sandy loam; massive; soft, very friable, slightly sticky, slightly plastic; low toughness; 2.0 fine roots throughout; 2.0 very fine low-continuity tubular pores; 1 percent fine irregular noncoherent cemented carbonate threads throughout; fragments; violent effervescence, by hcl, unspecified; very strongly alkaline, pH 9.3, hellige-truog. Lab sample # 95P00066