IDENTIFIERS

  • Current Taxon Name (Soil Name): Hobson
  • OSD
  • Series Extent
  • User Site ID: 1992MO161025M
  • User Pedon ID: 1992MO161025
  • Transect:
  • User Transect ID - T3092
  • Transect Stop Number - 3
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - MCL
  • Lab Pedon # - M9216125
  • Print Date: 4/26/2025

    • 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: 37.7990000
  • Std. Longitude: -91.8337222
  • Datum: WGS84
  • Township: T36N
  • Range: R8W
  • Section: 32
  • PLSS Details: 2485 feet E and 2650 feet N of the SW corner
  • Location Description: of sec. 32, T. 36 N. - R. 8 W.
  • Map Unit: 73160—Hobson loam, 8 to 15 percent slopes, bench
  • State: Missouri
  • County: MO161—Phelps
  • MLRA: 116A—Ozark Highland
  • Non-MLRA Soil Survey Area: MO161—Phelps County, Missouri

    • PEDON

  • Describers Name: S.L., P.K., G.B.
  • Current Taxonomic Class: Fine-loamy, siliceous, active Oxyaquic Fragiudalfs
  • Current Taxon Kind: series
  • Pedon Type: TUD pedon
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Correlated Information:
  • Soil Name - Hobson
  • PSC - 22 to 64 cm.
  • Classificaton Date - 7/24/2012
  • Soil Taxonomic Edition - ninth edition
  • Moisture Class - udic
  • Sampled As Information:
  • Soil Name - Yelton
  • Taxon Kind - series
  • Classificaton Date - 12/7/1992
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: slope alluvium derived from sandstone and/or residuum weathered from dolomite
  • Landscape: hills
  • Landform: bench
  • Geomorphic Component Hills: nose slope
  • Hill Slope Profile: backslope
  • Slope Position: lower third
  • Slope Shape Across: convex
  • Slope Shape Down: linear
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 12/7/1992 (actual site observation date)
  • Air Photo ID: C6
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    argillic horizon

    fragipan

    30—165

    69—114

    —-

    —-
    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

    15

    —

    —

    271

    —

    325

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 8 centimeters (0.0 to 3.1 inches); brown (10YR 4/3), pale brown (10YR 6/3), dry; silt loam; 12 percent clay; weak fine granular structure; friable; 5.0 fine and medium roots and 0.5 coarse roots; fragments; moderately acid, pH 5.7, hellige-truog; clear smooth boundary. Lab sample # MU064318. 2 inch layer of leaf litter and partialy decomposed organic matter
    E—8 to 15 centimeters (3.1 to 5.9 inches); brown (10YR 4/3) silt loam; 9 percent clay; weak fine granular, and weak fine subangular blocky structure; friable; 3.0 fine and medium roots; fragments; strongly acid, pH 5.5, hellige-truog; gradual wavy boundary. Lab sample # MU064319
    BE—15 to 23 centimeters (5.9 to 9.1 inches); yellowish brown (10YR 5/4) silt loam; 12 percent clay; weak fine and medium subangular blocky structure; friable; 3.0 medium roots and 0.5 fine roots; brown (10YR 4/3) worm casts; fragments; strongly acid, pH 5.3, hellige-truog; clear wavy boundary. Lab sample # MU064320
    Bt1—23 to 43 centimeters (9.1 to 16.9 inches); yellowish brown (10YR 5/6) and brownish yellow (10YR 6/6) loam; 20 percent clay; moderate medium subangular blocky structure; friable; 0.5 fine to coarse roots; 35 percent distinct clay films on faces of peds and in pores; fragments; very strongly acid, pH 5.0, hellige-truog; clear smooth boundary. Lab sample # MU064321
    Bt2—43 to 64 centimeters (16.9 to 25.2 inches); yellowish brown (10YR 5/4) and light yellowish brown (10YR 6/4) and brown (7.5YR 4/4) loam; 19 percent clay; moderate medium subangular blocky structure; friable; 0.5 medium roots; 15 percent distinct clay films on faces of peds and in pores; fragments; very strongly acid, pH 4.9, hellige-truog; clear smooth boundary. Lab sample # MU064322
    2Btx1—64 to 79 centimeters (25.2 to 31.1 inches); yellowish brown (10YR 5/4) and brown (7.5YR 4/4) fine sandy loam; 17 percent clay; weak very coarse prismatic parts to moderate medium prismatic structure; firm; 0.5 fine roots in cracks; skeletans over cutans and 35 percent prominent clay films on faces of peds and in pores; 5 percent by volume 2-39-75 millimeter limestone, cherty fragments; very strongly acid, pH 4.9, hellige-truog; clear wavy boundary. Lab sample # MU064323. Gray seams are from 1 to 2 inches wide. Prizms average 10 inches across. Gray seams are 10YR 6/1. 80 percent brittle.
    2Btx2—79 to 97 centimeters (31.1 to 38.2 inches); yellowish brown (10YR 5/4) and yellowish brown (10YR 5/6) very gravelly fine sandy loam; 13 percent clay; weak very coarse prismatic structure; firm; skeletans over cutans and 15 percent distinct clay films on faces of peds and in pores; 45 percent by volume 2-39-75 millimeter limestone, cherty fragments; very strongly acid, pH 4.9, hellige-truog; clear wavy boundary. Lab sample # MU064324. Gray seams are from 1 to 2 inches wide. Prizms average 10 inches across. Gray seams are 10YR 6/1. 75 percent brittle.
    2Btx3—97 to 109 centimeters (38.2 to 42.9 inches); strong brown (7.5YR 5/6) and yellowish brown (10YR 5/4) very gravelly fine sandy loam; 14 percent clay; weak very coarse prismatic structure; firm; skeletans over cutans and 15 percent prominent clay films on faces of peds and in pores; 55 percent by volume 2-39-75 millimeter limestone, cherty fragments; very strongly acid, pH 4.9, hellige-truog; abrupt wavy boundary. Lab sample # MU064325. Gray seams are from 1 to 2 inches wide. Prizms average 10 inches across. Gray seams are 10YR 7/2. 80 percent brittle.
    3Bt3—109 to 127 centimeters (42.9 to 50.0 inches); red (2.5YR 4/8) and yellowish brown (10YR 5/8) and strong brown (7.5YR 5/6) clay; 54 percent clay; weak medium subangular blocky structure; firm; 0.5 medium roots; 60 percent prominent clay films on faces of peds and in pores; 5 percent by volume 2-39-75 millimeter limestone, cherty fragments; very strongly acid, pH 4.9, hellige-truog; gradual wavy boundary. Lab sample # MU064326
    3Bt4—127 to 160 centimeters (50.0 to 63.0 inches); strong brown (7.5YR 5/6) and red (2.5YR 4/8) and yellowish brown (10YR 5/8) clay; 87 percent clay; weak medium subangular blocky structure; firm; 60 percent prominent clay films on faces of peds and in pores; 5 percent by volume 2-39-75 millimeter limestone, cherty fragments; strongly acid, pH 5.2, hellige-truog. Lab sample # MU064327