IDENTIFIERS

  • Current Taxon Name (Soil Name): mcknight
  • OSD
  • Series Extent
  • User Site ID: ok057-MktB-mcknight-1
  • User Pedon ID: s2003ok-057-005 mcknight
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - KSSL
  • Lab Pedon # - 03N0780
  • NCSS Pedon Lab Data NASIS Record ID - 16206
  • Print Date: 11/12/2024

    • 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: 34.7635574
  • Std. Longitude: -99.9168472
  • Datum: WGS84
  • Township: 3N
  • Range: 26W
  • Section: 3
  • PLSS Details: 1800 feet south and 1350 feet west of the northeast corner
  • Location Description: From the intersection of U.S. Highway 62 and OK State Highway 30 in Hollis, OK; 5.75 miles north on highway 62, then 1350 feet west in cropland.
  • Map Unit: 42—McKnight loamy fine sand, 0 to 3 percent slopes42—McKnight loamy fine sand, 0 to 3 percent slopes
  • Country: US—United States
  • State: Oklahoma
  • County: OK057—Harmon
  • MLRA: 78B—Central Rolling Red Plains, Western Part
  • Regional Office: SC—South Central
  • Non-MLRA Soil Survey Area: OK057—Harmon County, Oklahoma
  • 7.5 Minute USGS Quad: 34099-G8—McKnight, Oklahoma

    • PEDON

  • Describers Name: RFG,CDS,CLN,WG,DDR,JAG,AS
  • Current Taxonomic Class: Fine-loamy over clayey, mixed, active, thermic Typic Haplustalfs
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Correlated Information:
  • Soil Name - mcknight
  • PSC - 36 to 100 cm.
  • Classificaton Date - 1/7/2008
  • Soil Taxonomic Edition - ninth edition
  • Moisture Class - ustic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - mcknight
  • Classificaton Date - 6/25/2003
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: sandy and loamy alluvium over silty and clayey residuum weathered from calcareous shale
  • Landscape: alluvial plain
  • Landform: thin stream terrace
  • Geomorphic Component Terraces: tread
  • Runoff: medium
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: noncoherent shale, calcareous at 133cm with 10 to <45
  • Geology: Dog Creek Formation Of Permian Age formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/25/2003 (actual site observation date)
  • Air Photo ID: PSS #12
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Site Obs. Cover Kind 2 - close-grown crop
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    bedrock, densic

    noncoherent

    133 - 240

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

    argillic horizon

    densic contact

    36—74

    133—240

    —-

    —-
    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

    —

    —

    527.3

    —

    135

    585

    —

    210

    16.1

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 36 centimeters (0.0 to 14.2 inches); reddish brown (5YR 5/4), reddish brown (5YR 4/4), moist; loamy sand; single grain; loose, loose; very fine roots and 4.0 fine roots; 1 percent by volume rounded quartzite fragments; noneffervescent; moderately acid, pH 6.0, hellige-truog; abrupt smooth boundary.; observed in trench
    Bt1—36 to 53 centimeters (14.2 to 20.9 inches); reddish brown (2.5YR 5/4), reddish brown (2.5YR 4/4), moist; sandy clay loam; 24 percent clay; moderate coarse prismatic parts to moderate medium subangular blocky structure; hard, firm; very fine roots and 3.0 fine roots; 1.0 medium and 3.0 fine pores; 30 percent distinct clay films on all faces of peds; 3 percent by volume rounded quartzite fragments; noneffervescent; neutral, pH 6.8, hellige-truog; clear smooth boundary.; observed in trench
    Bt2—53 to 74 centimeters (20.9 to 29.1 inches); red (2.5YR 5/6), red (2.5YR 4/6), moist; fine sandy loam; 19 percent clay; moderate coarse prismatic parts to moderate medium subangular blocky structure; hard, firm; very fine roots and 2.0 fine roots; 1.0 medium and 2.0 fine pores; 30 percent distinct clay films on all faces of peds; 4 percent by volume rounded quartzite fragments; noneffervescent; neutral, pH 7.2, hellige-truog; abrupt smooth boundary.; observed in trench
    2Bt—74 to 92 centimeters (29.1 to 36.2 inches); red (2.5YR 4/6), dark red (2.5YR 3/6), moist; clay; 45 percent clay; 1 percent light greenish gray (10Y 7/1) medium prominent mottles; strong coarse prismatic parts to strong medium angular blocky structure; extremely hard, very firm; very fine roots and 1.0 fine roots; 1.0 fine pores; 60 percent distinct clay films on all faces of peds; fragments; noneffervescent; moderately alkaline, pH 8.0, hellige-truog; clear smooth boundary.; observed in trench
    2CBk—92 to 108 centimeters (36.2 to 42.5 inches); 80 percent greenish gray (5GY 6/1) and 20 percent red (2.5YR 4/6), 80 percent greenish gray (5GY 5/1) and 20 percent dark red (2.5YR 3/6), moist; silty clay loam; 33 percent clay; massive, and weak medium prismatic; hard, firm; very fine roots and 0.5 fine roots; 1.0 fine pores; 5 percent carbonate coats; 4 percent by volume angular moderately coherent cemented 5-20-76 millimeter shale, unspecified fragments; slight effervescence; moderately alkaline, pH 8.2, hellige-truog; clear smooth boundary.; observed in trench
    2Ck—108 to 133 centimeters (42.5 to 52.4 inches); 50 percent red (2.5YR 4/6) and 50 percent greenish gray (5GY 6/1), 50 percent dark red (2.5YR 3/6) and 50 percent greenish gray (5GY 5/1), moist; bedrock; moderate excavation difficulty; very fine roots around fragments and 0.1 fine roots; 0.5 fine pores; 5 percent carbonate coats; 4 percent by volume angular moderately coherent cemented 5-20-76 millimeter shale, unspecified fragments; slight effervescence; moderately alkaline, pH 8.2, hellige-truog; gradual smooth boundary.; observed in trench
    2Cd—133 to 240 centimeters (52.4 to 94.5 inches); 80 percent red (2.5YR 4/6) and 20 percent greenish gray (5GY 6/1), 80 percent dark red (2.5YR 3/6) and 20 percent greenish gray (5GY 5/1), moist; bedrock; high excavation difficulty; 4 percent by volume angular moderately coherent cemented 5-20-76 millimeter shale, unspecified fragments; slight effervescence; moderately alkaline, pH 8.2, hellige-truog.; observed in trench