IDENTIFIERS

  • Current Taxon Name (Soil Name): Colby
  • OSD
  • Series Extent
  • User Site ID: S1960CO099006
  • User Pedon ID: S1960CO099006
  • User Site Association ID: mlra72-benchmark lab pedonsmlra72-SDJR comp peds
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A3859
  • NCSS Pedon Lab Data NASIS Record ID - 39505
  • Print Date: 6/2/2024

    • 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: 37.7918278
  • Std. Longitude: -102.6524889
  • Datum: WGS84
  • Township: 26S
  • Range: 47W
  • Section: 12
  • PLSS Details: 322 meters north and 402 meters east of the southwest corner
  • Map Unit: CmB—Colby silt loam, 1 to 3 percent slopes
  • State: Colorado
  • County: CO099—Prowers
  • Non-MLRA Soil Survey Area: CO099—Prowers County, Colorado
  • 7.5 Minute USGS Quad: 37102-G6—Cat Creek, Colorado

    • PEDON

  • Describers Name: James P. Pannell
  • Current Taxonomic Class: Fine-silty, mixed, superactive, calcareous, mesic Aridic Ustorthents
  • Current Taxon Kind: taxadjunct
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 6
  • Correlated Information:
  • Soil Name - Colby
  • PSC - 25 to 100 cm.
  • Classificaton Date - 10/10/2014
  • Classifier - Tom Cochran
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - ustic
  • Moisture Subclass - aridic (torric)
  • Sampled As Information:
  • Soil Name - Colby
  • Taxonomic Class - Fine-silty, mixed, superactive, mesic Aridic Ustor
  • Taxon Kind - series
  • Classificaton Date - 10/1/1960
  • Classifier - James Pannell
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • QC Status: level 1
  • QA Status: level 1


    • SITE

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

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/1/1960 (actual site observation date)
  • Air Photo ID: 101
  • 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
    • Pedon Horizon Lab Results - 1
    Horizon Top Depth Bottom Depth Sample ID Data Collector Total Clay CaCO3 Clay Total Silt Fine Silt Co. Silt Total Sand Total Sand Method VC Sand Co. Sand Med. Sand Fine Sand VF Sand VF Sand Method Texture Class - Field Lab Rubbed Fiber Unrubbed Fiber pH H2O
    cm cm % % % % % % % % % % % % %

    A1

    A2

    AC

    C1

    C2

    C3

    0

    3

    18

    36

    76

    102

    3

    18

    36

    76

    102

    152

    40A29561

    40A29562

    40A29563

    40A29564

    40A29565

    40A29566

    James Pannell

    James Pannell

    James Pannell

    James Pannell

    James Pannell

    James Pannell

    17.3

    29

    19.8

    15

    21.9

    17.5

    0

    3

    1

    2

    2

    2

    62.5

    61.2

    64.5

    54

    65.9

    44.1

    19.7

    23.4

    18.4

    11

    21.7

    14

    42.8

    37.8

    46.1

    43

    44.2

    30.1

    20.2

    9.8

    15.7

    31

    12.2

    38.4

    —

    —

    —

    —

    —

    —

    0.8

    0.2

    0

    0

    0

    1.6

    1.8

    0.4

    0.2

    0

    0.1

    7.9

    1.3

    0.4

    0.3

    0.3

    0.2

    7.4

    3.6

    1.5

    2.1

    6.6

    1.6

    12.8

    12.7

    7.3

    13.1

    24.1

    10.3

    8.7

    —

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    sil

    sicl

    sil

    sil

    sil

    l

    —

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    —

    —

    —

    —

    —

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    7.9

    7.4

    7.8

    7.7

    7.8

    7.9
    Pedon Horizon Lab Results - 2
    Horizon Top Depth Bottom Depth Sample ID pH CaCl2 pH NaF pH Ox Delta pH LL PL PI Atter. Samp. Cond. COLE Pot. Acidity Ca + Mg - Meh 2 K Ca + Mg - Sat. Paste KCl Extract. Acidity Base Sat. - Meh 2 CEC-7 CEC-8.2
    cm cm % % % cm/cm meq/100g cmol(+)/kg cmol(+)/kg mmol(+)/l cmol(+)/kg % cmol(+)/kg cmol(+)/kg

    A1

    A2

    AC

    C1

    C2

    C3

    0

    3

    18

    36

    76

    102

    3

    18

    36

    76

    102

    152

    40A29561

    40A29562

    40A29563

    40A29564

    40A29565

    40A29566

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    Pedon Horizon Lab Results - 3
    Horizon Top Depth Bottom Depth Sample ID ECEC Phosphate P NO3-N EC EC Method EC 1:5 by volume CaCO3 Equiv. Equiv. Gypsum Na SAR Gypsum Req. Humic Color Fulvic Color Humic + Fulvic Color Al PI Pyro. Hue PyrO. Value Pyro. Chroma
    cm cm cmol(+)/kg mg/kg mg/kg dS/m dS/m % % mmol(+)/l % L-pcu/g L-pcu/g L-pcu/g %

    A1

    A2

    AC

    C1

    C2

    C3

    0

    3

    18

    36

    76

    102

    3

    18

    36

    76

    102

    152

    40A29561

    40A29562

    40A29563

    40A29564

    40A29565

    40A29566

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    4

    11

    8

    6

    8

    8

    —

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

    ochric epipedon

    0—15

    —15—
    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

    —

    —

    1234.1

    —

    356

    —

    —

    —

    —

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    A1—0 to 3 centimeters (0.0 to 1.2 inches); dark grayish brown (10YR 4/2), light brownish gray (10YR 6/2), dry; silt loam; weak fine platy parts to weak very fine granular structure; soft, very friable; moderate permeability; fragments; loam of texture class; strong effervescence; clear smooth boundary. Lab sample # 40A29561
    A2—3 to 18 centimeters (1.2 to 7.1 inches); dark brown (10YR 3/3) and brown (10YR 4/3), pale brown (10YR 6/3), dry; silty clay loam; moderate fine granular structure; slightly hard, very friable; moderately slow permeability; fragments; silt loam of texture class; strong effervescence; clear smooth boundary. Lab sample # 40A29562
    AC—18 to 36 centimeters (7.1 to 14.2 inches); brown (10YR 4/3), pale brown (10YR 6/3), dry; silt loam; weak medium subangular blocky parts to weak fine granular structure; slightly hard, very friable; moderate permeability; fragments; silt loam of texture class; violent effervescence; gradual smooth boundary. Lab sample # 40A29563
    C1—36 to 76 centimeters (14.2 to 29.9 inches); brown (10YR 4/3), pale brown (10YR 6/3), dry; silt loam; weak medium subangular blocky structure; slightly hard, very friable; moderate permeability; fragments; silt loam of texture class; violent effervescence; gradual smooth boundary. Lab sample # 40A29564
    C2—76 to 102 centimeters (29.9 to 40.2 inches); brown (10YR 4/3) and brown (10YR 5/3), pale brown (10YR 6/3), dry; silt loam; structureless massive; slightly hard, very friable; moderate permeability; fragments; silt loam of texture class; violent effervescence; gradual smooth boundary. Lab sample # 40A29565
    C3—102 to 152 centimeters (40.2 to 59.8 inches); brown (10YR 4/3) and brown (10YR 5/3), pale brown (10YR 6/3), dry; stratified loam; massive; soft, very friable; moderate permeability; fragments; stratified silt loam of texture class; violent effervescence. Lab sample # 40A29566. This horizon is described with stratified texture, but there is no indication of what caused the stratification. It should be a lithologic discontinuity whether it is stratified loess or alluvium because of the change in textural class.