IDENTIFIERS

  • Current Taxon Name (Soil Name): BLACKHAWK
  • OSD
  • Series Extent
  • User Site ID: S1956NV027014
  • User Pedon ID: S1956NV027014
  • Vegetation Plot ID: S1956NV027014
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A3186
  • NCSS Pedon Lab Data NASIS Record ID - 38315
  • Print Date: 4/27/2025

    • 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: 40.6832275
  • Std. Longitude: -117.7009659
  • Datum: WGS84
  • Township: 32N
  • Range: 38E
  • Section: 3
  • PLSS Details: In the NE corner
  • Location Description: in Grass Valley about 21 miles south of Winnemucca.
  • State: Nevada
  • County: NV027—Pershing
  • MLRA: 24—Humboldt Basin and Range Area
  • Non-MLRA Soil Survey Area: NV769—Pershing County, Nevada, East Part

    • PEDON

  • Describers Name: W. G. Harper
  • Current Taxonomic Class: Loamy, mixed, mesic Entic Durorthids
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 14
  • Correlated Information:
  • Soil Name - BLACKHAWK
  • PSC - 25 to 100 cm.
  • Classificaton Date - 7/16/2007
  • Moisture Class - aridic (torric)
  • Sampled As Information:
  • Soil Name - Blackhawk
  • Classificaton Date - 7/25/1956
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landform: alluvial fan
  • Runoff: medium
  • Drainage Class: moderately well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 7/25/1956 (actual site observation date)
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    ATCO

    ATCO

    BRTE

    Atriplex confertifolia

    Atriplex confertifolia

    Bromus tectorum

    shadscale saltbush

    shadscale saltbush

    cheatgrass

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    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

    2

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    1387

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    45

    203

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    A1—0 to 8 centimeters (0.0 to 3.1 inches); light brownish gray (10YR 6/2), dark grayish brown (10YR 4/2), moist; very fine sandy loam; weak coarse platy structure; soft, very friable, slightly sticky, slightly plastic; fragments; noneffervescent; strongly alkaline, pH 8.5, thymol-blue; abrupt smooth boundary. Lab sample # 40A24912
    B2—8 to 20 centimeters (3.1 to 7.9 inches); very pale brown (10YR 7/3), brown (10YR 5/3), moist; very fine sandy loam; strong fine platy structure; soft, very friable, nonsticky, nonplastic; fragments; noneffervescent; strongly alkaline, pH 8.6, thymol-blue; abrupt smooth boundary. Lab sample # 40A24913
    C1si—20 to 36 centimeters (7.9 to 14.2 inches); very pale brown (10YR 7/3), grayish brown (10YR 5/2), moist; loam; massive; slightly hard, friable, nonsticky, nonplastic; 21.0 fine roots; 21.0 vesicular pores; fragments; noneffervescent; strongly alkaline, pH 8.6, thymol-blue; abrupt smooth boundary. Lab sample # 40A24914
    C2sim—36 to 41 centimeters (14.2 to 16.1 inches); dark grayish brown (2.5Y 4/2), dark grayish brown (2.5Y 4/2), moist; loam; strong fine platy structure; very hard, very firm, strongly coherent by silica, slightly sticky, slightly plastic; 3.0 very fine roots top of horizon; 0.5 fine tubular and 21.0 fine vesicular pores; fragments; noneffervescent; strongly alkaline, pH 9.0, thymol-blue; abrupt smooth boundary. Lab sample # 40A24915
    C3si—41 to 46 centimeters (16.1 to 18.1 inches); pale brown (10YR 6/3), brown (10YR 4/3), moist; loam; weak medium and coarse platy structure; soft, very friable, nonsticky, nonplastic; 21.0 fine roots; fragments; noneffervescent; very strongly alkaline, pH 9.4, thymol-blue; clear wavy boundary. Lab sample # 40A24916
    C4si—46 to 53 centimeters (18.1 to 20.9 inches);, dark grayish brown (2.5Y 4/2), moist; loam; weak medium platy, and massive; soft, very friable, nonsticky, nonplastic; 21.0 fine roots; fragments; noneffervescent; very strongly alkaline, pH 9.6, thymol-blue; abrupt smooth boundary. Lab sample # 40A24917
    C5sim—53 to 64 centimeters (20.9 to 25.2 inches); light olive brown (2.5Y 5/3), olive brown (2.5Y 4/3), moist; sandy loam; moderate medium and coarse platy structure; extremely hard, very firm, strongly coherent by silica, nonsticky, nonplastic; 21.0 fine roots top of horizon; 0.5 very fine and fine tubular pores; fragments; noneffervescent; very strongly alkaline, pH 9.4, thymol-blue; abrupt smooth boundary. Lab sample # 40A24918
    C6sicam—64 to 71 centimeters (25.2 to 28.0 inches); light olive brown (2.5Y 5/3), olive brown (2.5Y 4/3), moist; sandy loam; moderate medium and coarse platy structure; hard, firm, strongly coherent by silica, nonsticky, nonplastic; 21.0 fine roots; 21.0 fine and 0.5 pores; fragments; noneffervescent; very strongly alkaline, pH 9.4, thymol-blue; abrupt smooth boundary. Lab sample # 40A24919
    C7sicam—71 to 76 centimeters (28.0 to 29.9 inches); light olive brown (2.5Y 5/3), olive brown (2.5Y 4/3), moist; sandy loam; weak coarse platy structure; extremely hard, firm, strongly coherent by silica, nonsticky, nonplastic; 0.5 fine roots; 0.5 fine pores; fragments; noneffervescent; very strongly alkaline, pH 9.4, thymol-blue; abrupt wavy boundary. Lab sample # 40A24920
    C8casi—76 to 94 centimeters (29.9 to 37.0 inches); pale brown (10YR 6/3), brown (10YR 4/3), moist; sandy loam; weak medium and coarse subangular blocky structure; very hard, very firm, nonsticky, nonplastic; 0.5 medium and 3.0 fine tubular pores; fragments; noneffervescent; strongly alkaline, pH 9.0, thymol-blue; abrupt wavy boundary. Lab sample # 40A24921
    2C9ca—94 to 135 centimeters (37.0 to 53.1 inches); very pale brown (10YR 7/3) and white (10YR 8/1), grayish brown (10YR 5/2), moist; coarse sand; massive; hard, firm, weakly coherent, nonsticky, nonplastic; 0.5 fine roots; fragments; noneffervescent; very strongly alkaline, pH 9.2, thymol-blue; abrupt irregular boundary. Lab sample # 40A24922
    2C10—135 to 170 centimeters (53.1 to 66.9 inches); brown (10YR 5/3), dark grayish brown (10YR 4/2), moist; very gravelly coarse sand; massive; slightly hard, firm, nonsticky, nonplastic; fragments; noneffervescent; strongly alkaline, pH 8.5, thymol-blue; abrupt smooth boundary. Lab sample # 40A24923
    Bb1—170 to 178 centimeters (66.9 to 70.1 inches); pale brown (10YR 6/3), weak red (2.5YR 4/2), moist; sandy clay loam; massive parts to weak coarse platy; hard, friable, moderately sticky, slightly plastic; 0.5 fine roots; 21.0 fine pores; fragments; noneffervescent; strongly alkaline, pH 8.6, thymol-blue; clear smooth boundary.
    Bb2—178 to 185 centimeters (70.1 to 72.8 inches); brown (10YR 5/3), reddish brown (2.5YR 4/3) and brown (10YR 4/3), moist; sandy clay loam; massive parts to strong medium and coarse subangular blocky; hard, friable, slightly sticky, slightly plastic; 0.5 fine and medium roots; 21.0 fine pores; fragments; noneffervescent; strongly alkaline, pH 8.6, thymol-blue; abrupt smooth boundary.
    Btb—185 to 203 centimeters (72.8 to 79.9 inches); brown (10YR 5/3), reddish brown (2.5YR 4/3) and dark grayish brown (10YR 4/2), moist; clay loam; moderate medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; 0.5 fine roots; fragments; noneffervescent; strongly alkaline, pH 8.6, thymol-blue; abrupt smooth boundary.
    Ckb—203 to 229 centimeters (79.9 to 90.2 inches); very pale brown (10YR 7/3), brown (10YR 5/3), moist; loam; massive; hard, firm, slightly sticky, slightly plastic; 0.1 fine roots; fragments; noneffervescent; strongly alkaline, pH 9.0, thymol-blue; abrupt wavy boundary.
    Cb—229 centimeters (90.2 inches); fragments.