IDENTIFIERS

  • Current Taxon Name (Soil Name): Avar
  • OSD
  • Series Extent
  • User Site ID: S2016CO123005
  • User Pedon ID: S2016CO123005
  • Vegetation Plot ID: S2016CO123005
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - KSSL
  • Lab Pedon # - 16N0629
  • User Project ID: CPER_010_NEON
  • Project Name: Central Plains Experimental Range
  • Print Date: 12/6/2025

    • 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: 40.8507222
  • Std. Longitude: -104.6994167
  • Datum: WGS84
  • Township: 10N
  • Range: 65W
  • Section: 7
  • PLSS Details: 850 feet west and 1,730 feet south from the northeast corner
  • Location Description: Soil pit located 5.2 meters at a 163 degree angle from the southeast corner of the 20m x 20m plot to the center of the soil pit.
  • Map Unit: 9—Avar fine sandy loam
  • State: Colorado
  • County: CO123—Weld
  • MLRA: 67B—Central High Plains, Southern Part
  • MLRA Soil Survey Area: NW-FTM—Fort Morgan, Colorado
  • Non-MLRA Soil Survey Area: CO617—Weld County, Colorado, Northern Part
  • 7.5 Minute USGS Quad: 40104-G6—Eastman Creek South, Colorado

    • PEDON

  • Describers Name: Andy Steinert
  • Current Taxonomic Class: Coarse-loamy, mixed, superactive, mesic Aridic Argiustolls
  • Current Taxon Kind: series
  • Pedon Type: taxadjunct to the series
  • Pedon Purpose: research site
  • Pedon Record Orgin: NASIS
  • Pedon #: 5
  • Sampled As Information:
  • Soil Name - Avar
  • Taxonomic Class - Coarse-loamy, mixed, superactive, mesic Aridic Argiustolls
  • Taxon Kind - series
  • PSC - 13 to 37 cm.
  • Classificaton Date - 3/21/2016
  • Classifier - Andy Steinert
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - ustic
  • Moisture SUBClass - aridic (torric)
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: alluvium
  • Landform: old terrace
  • Geomorphic Component Terraces: tread
  • Slope Complexity: simple
  • Slope Shape Across: convex
  • Slope Shape Down: linear
  • Runoff: negligible
  • Ksat Class Upper: high
  • Ksat Class Lower: moderately high
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments:
  • Benchmark Soil?: no
  • RaCA Information:
  • RaCA Site ID - CPER_001
  • DSP Plot ID - SE
  • Plot Baseline Azimuth - 163
  • Plot Baseline Length - 5
  • Plot Width - 20
  • Plot/Site Set Up By - Center of pit
  • Plot or Site Recorder - Andy Steinert

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 3/21/2016 (actual site observation date)
  • Data Collector: Andy Steinert
  • 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
  • Current Weather - partly cloudy
  • Current Air Temp - 13
    • 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 % % % % % % % % % % % % %

    A

    Bt

    2Bz1

    2Bz2

    0

    13

    37

    58

    13

    37

    58

    100

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    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

    A

    Bt

    2Bz1

    2Bz2

    0

    13

    37

    58

    13

    37

    58

    100

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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 %

    A

    Bt

    2Bz1

    2Bz2

    0

    13

    37

    58

    13

    37

    58

    100

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    0.3

    0.63

    6.13

    6.76

    ec meter, 1:1 water

    ec meter, 1:1 water

    ec meter, 1:1 water

    ec meter, 1:1 water

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    Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    ATCA2

    BOGR2

    DISP

    OPPO

    PASM

    SPAI

    Atriplex canescens

    Bouteloua gracilis

    Distichlis spicata

    Opuntia polyacantha

    Pascopyrum smithii

    Sporobolus airoides

    fourwing saltbush

    blue grama

    saltgrass

    plains pricklypear

    western wheatgrass

    alkali sacaton

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

    mollic epipedon

    argillic horizon

    0—37

    13—37

    —37—

    —24—
    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

    0.5

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    1643.5

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    A—0 to 13 centimeters (0.0 to 5.1 inches); brown (10YR 5/3) broken face, very dark grayish brown (10YR 3/2) broken face, moist; loamy coarse sand; 85 percent sand; 6 percent silt; 9 percent clay; weak fine granular, and weak fine subangular blocky structure; soft, very friable, nonsticky, nonplastic; Ksat of 91.74 um/s; rapid permeability; common (2.0) very fine roots throughout and common (2.0) fine roots throughout and common (1.0) coarse roots throughout; fragments; noneffervescent, by hcl, 1n; neutral, pH 6.8, pH indicator solutions; clear smooth boundary. Lab sample # 16N02711; observed in pit, small
    Bt—13 to 37 centimeters (5.1 to 14.6 inches); dark grayish brown (10YR 4/2) broken face, very dark brown (10YR 2/2) broken face, moist; coarse sandy loam; 80 percent sand; 5 percent silt; 15 percent clay; moderate medium prismatic parts to moderate medium subangular blocky, and moderate medium prismatic parts to moderate coarse subangular blocky structure; slightly hard, friable, slightly sticky, nonplastic; Ksat of 28.225 um/s; moderately rapid permeability; common (1.0) very fine roots throughout and common (1.0) fine roots throughout and common (1.0) coarse roots throughout; few (0.2) very fine vesicular pores; 10 percent distinct clay bridges on all faces of peds and 15 percent distinct clay films on all faces of peds; fragments; noneffervescent, by hcl, 1n; moderately alkaline, pH 8.2, pH indicator solutions; gradual wavy boundary. Lab sample # 16N02712; observed in pit, small. continuous - phpvsfiid 1555281; continuous - phpvsfiid 1555282; continuous - phpvsfiid 1555281; continuous - phpvsfiid 1555282
    2Bz1—37 to 58 centimeters (14.6 to 22.8 inches); yellowish brown (10YR 5/4) broken face, brown (10YR 4/3) broken face, moist; clay loam; 35 percent sand; 33 percent silt; 32 percent clay; weak coarse prismatic, and moderate coarse subangular blocky, and moderate medium subangular blocky structure; slightly hard, friable, very sticky, moderately plastic; Ksat of 2.82 um/s; moderately slow permeability; common (1.0) very fine roots throughout and common (1.0) fine roots throughout; few (0.2) very fine vesicular pores; carbonate, finely disseminated throughout and 7 percent fine threadlike salt crystals in matrix; fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.2, pH indicator solutions; gradual wavy boundary. Lab sample # 16N02713; observed in pit, small
    2Bz2—58 to 100 centimeters (22.8 to 39.4 inches); pale brown (10YR 6/3) broken face, brown (10YR 5/3) broken face, moist; silty clay loam; 15 percent sand; 53 percent silt; 32 percent clay; moderate medium subangular blocky, and moderate coarse subangular blocky structure; hard, firm, very sticky, moderately plastic; Ksat of 2.82 um/s; moderately slow permeability; common (1.0) very fine roots throughout; few (0.2) very fine vesicular pores; carbonate, finely disseminated throughout and 2 percent fine threadlike salt crystals in matrix; fragments; violent effervescence, by hcl, 1n; very strongly alkaline, pH 9.6, pH indicator solutions. Lab sample # 16N02714; observed in pit, small