IDENTIFIERS

  • Current Taxon Name (Soil Name): Gessner
  • OSD
  • Series Extent
  • User Site ID: S1992TX201001
  • User Pedon ID: 92TX201001
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - KSSL
  • Lab Pedon # - 93P0347
  • NCSS Pedon Lab Data NASIS Record ID - 65690
  • 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: 29.9291668
  • Std. Longitude: -95.6999969
  • Datum: WGS84
  • State: Texas
  • County: TX201—Harris
  • MLRA: 150A—Gulf Coast Prairies
  • Non-MLRA Soil Survey Area: TX201—Harris County, Texas
  • PEDON

  • Describers Name: G. Chervenka, G. Lane, W. Miller, D. Williams, W. Greenberg, R. Griffin, R. Drees, L. Wilding, J. Jacobs, S. Starowitz, and R. Molina
  • Current Taxonomic Class: Fine-loamy, active, hyperthermic Typic Vermaqualfs
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: research site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 1
  • Correlated Information:
  • Soil Name - Gessner (flagged as OSD)
  • PSC - 47 to 97 cm.
  • Classificaton Date - 9/16/1992
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Subclass - aquic
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1
  • QA Status: level 3


  • SITE

  • Landscape: plains
  • Slope Position: depression
  • Slope Shape Down: concave
  • Drainage Class: poorly
  • Surface Fragments:
  • Benchmark Soil?: no
  • VEGETATION

    SITE OBSERVATION

  • Observation Date: 9/16/1992 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
  • 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

    Eg1

    Eg2

    2Btg1

    2Btg2

    2Btg3

    2Btg4

    2Btg5

    2Btg6

    0

    10

    24

    47

    64

    96

    125

    156

    184

    10

    24

    47

    64

    96

    125

    156

    184

    225

    7.1

    6.2

    7.7

    12

    22.7

    20.8

    20

    20.8

    22.7

    29.9

    29.7

    28.4

    29

    28.7

    24.8

    22.4

    22.6

    22

    10.2

    10.3

    11.2

    11.1

    14

    11.4

    9.3

    9

    10.1

    19.7

    19.4

    17.2

    17.9

    14.7

    13.4

    13.1

    13.6

    11.9

    63

    64.1

    63.9

    59

    48.6

    54.4

    57.6

    56.7

    55.3

    sieves

    sieves

    sieves

    sieves

    sieves

    sieves

    sieves

    sieves

    sieves

    0

    0.1

    0

    0

    0

    0

    0.1

    0.2

    0.4

    0.1

    0.1

    0.1

    0.1

    0.1

    0.1

    0.1

    0.2

    0.2

    3.2

    3.1

    3

    2.7

    2.4

    2.5

    2.6

    2.4

    2.9

    38.5

    38.4

    37.2

    36.3

    29.1

    32.6

    33.2

    35.9

    34.3

    21.2

    22.4

    23.6

    19.9

    17

    19.2

    21.6

    18

    17.5

    300 mesh sieve

    300 mesh sieve

    300 mesh sieve

    300 mesh sieve

    300 mesh sieve

    300 mesh sieve

    300 mesh sieve

    300 mesh sieve

    300 mesh sieve

    fsl

    fsl

    fsl

    fsl

    l

    scl

    scl

    scl

    scl

    5

    5

    6.3

    5.4

    5.2

    5.2

    5.2

    5.5

    5.7

    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

    Eg1

    Eg2

    2Btg1

    2Btg2

    2Btg3

    2Btg4

    2Btg5

    2Btg6

    0

    10

    24

    47

    64

    96

    125

    156

    184

    10

    24

    47

    64

    96

    125

    156

    184

    225

    4.4

    4.3

    5.7

    4.5

    4.2

    4.1

    4.2

    4.4

    4.6

    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

    Eg1

    Eg2

    2Btg1

    2Btg2

    2Btg3

    2Btg4

    2Btg5

    2Btg6

    0

    10

    24

    47

    64

    96

    125

    156

    184

    10

    24

    47

    64

    96

    125

    156

    184

    225

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

    ochric epipedon

    aquic conditions

    albic horizon

    episaturation

    argillic horizon

    endosaturation

    0—47

    0—203

    10—47

    10—48

    47—324

    48—

    —-

    —-

    —-

    —-

    —-

    —-

    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

    43

    1058

    20

    A—0 to 10 centimeters (0.0 to 3.9 inches); brown (10YR 5/3), pale brown (10YR 6/3), dry; fine sandy loam; 1 percent yellowish brown (10YR 5/6) fine faint mottles; weak fine subangular blocky structure; very friable; 10.0 fine and medium roots; 10.0 very fine and fine and 10.0 medium pores; fragments; slightly acid, pH 6.5, unspecified; clear smooth boundary. Lab sample # 93P02659
    Eg1—10 to 24 centimeters (3.9 to 9.4 inches); brown (10YR 5/3), very pale brown (10YR 7/3), dry; fine sandy loam; 1 percent yellowish brown (10YR 5/6) fine distinct mottles; weak fine subangular blocky structure; slightly hard, very friable; 10.0 very fine and fine roots and 3.0 medium roots; 10.0 very fine and fine and 0.5 medium pores; 1 percent fine iron-manganese concretions; fragments; 55 percent krotovinas (lateral area percent); slightly acid, pH 6.5, unspecified; clear smooth boundary. Lab sample # 93P02660. krotovina mixing in more than 50% of horizon with indistinct boundaries.
    Eg2—24 to 47 centimeters (9.4 to 18.5 inches); grayish brown (10YR 5/2) fine sandy loam; 10 percent strong brown (7.5YR 5/6) fine distinct mottles; weak medium subangular blocky structure; friable; 3.0 very fine roots and 10.0 fine roots; 10.0 very fine and fine and 0.5 medium pores; 1 percent fine iron-manganese concretions; fragments; 75 percent krotovinas (lateral area percent); moderately acid, pH 6.0, unspecified; clear irregular boundary. Lab sample # 93P02661. krotovina mixing in more than 70% of horizon with 15% active with distinct boundaries; many very fine worms.
    2Btg1—47 to 64 centimeters (18.5 to 25.2 inches); grayish brown (10YR 5/2) sandy clay loam; 1 percent strong brown (7.5YR 5/6) fine distinct and 10 percent strong brown (7.5YR 5/6) fine distinct mottles; weak medium subangular blocky structure; friable; 10.0 very fine and fine roots; 10.0 very fine and fine pores; fragments; 75 percent krotovinas (lateral area percent); strongly acid, pH 5.5, unspecified; clear irregular boundary. Lab sample # 93P02662. krotovina mixing in more than 70% of horizon with 15% active with distinct boundaries.
    2Btg2—64 to 96 centimeters (25.2 to 37.8 inches); dark grayish brown (10YR 4/2) clay loam; 1 percent very pale brown (10YR 7/4) fine and 25 percent strong brown (7.5YR 5/6) fine distinct mottles; moderate coarse prismatic parts to weak medium subangular blocky structure; firm; 3.0 very fine and fine roots; 10.0 very fine and 3.0 fine pores; 15 percent faint grayish brown (10YR 5/2) clay films on all faces of peds; fragments; 50 percent krotovinas (lateral area percent); very strongly acid, pH 5.0, unspecified; clear irregular boundary. Lab sample # 93P02663. 50% krotovina mixing with 25% active; few uncoated sand grains.
    2Btg3—96 to 125 centimeters (37.8 to 49.2 inches); dark grayish brown (10YR 4/2) clay loam; 1 percent strong brown (7.5YR 5/6) medium distinct and 25 percent strong brown (7.5YR 5/8) fine distinct mottles; moderate coarse prismatic parts to moderate medium subangular blocky structure; firm; 0.5 very fine and fine roots; 3.0 very fine and 0.5 fine pores; 15 percent faint grayish brown (10YR 5/2) clay films on all faces of peds; 1 percent iron-manganese concretions; fragments; 50 percent krotovinas (lateral area percent); very strongly acid, pH 5.0, unspecified; gradual irregular boundary. Lab sample # 93P02664. common uncoated sand grains; 50% krotovina mixing with 25% active; few dark grayish green (5G 4/1) krotovina linings.
    2Btg4—125 to 156 centimeters (49.2 to 61.4 inches); light brownish gray (10YR 6/2) sandy clay loam; 10 percent strong brown (7.5YR 5/6) coarse distinct mottles; moderate coarse prismatic parts to moderate coarse angular blocky structure; very firm; 0.5 very fine roots; 3.0 very fine and 0.5 fine pores; distinct light olive brown (2.5Y 5/6), moist, clay films and distinct dark greenish gray (5G 4/1), moist, clay films and 37 percent faint grayish brown (10YR 5/2) clay films on all faces of peds; 1 percent iron-manganese concretions and 10 percent medium and coarse spherical iron-manganese concretions; fragments; 40 percent krotovinas (lateral area percent); very strongly acid, pH 5.0, unspecified; gradual irregular boundary. Lab sample # 93P02665. 1-5 mm of interlayered sand and clay lining ped faces; 40% distinct krotovina activity.; patchy - phpvsfiid 1040095; patchy - phpvsfiid 1040095
    2Btg5—156 to 184 centimeters (61.4 to 72.4 inches); light gray (10YR 7/2) sandy clay; 1 percent red (2.5YR 4/6) fine prominent and 10 percent strong brown (7.5YR 5/6) medium distinct mottles; strong coarse prismatic parts to moderate coarse angular blocky structure; very firm; 0.5 very fine roots; 3.0 very fine pores; faint dark greenish gray (5G 4/1) clay films and 37 percent faint light brownish gray (10YR 6/2) clay films on all faces of peds; 1 percent coarse iron-manganese concretions and 10 percent coarse spherical iron-manganese concretions; fragments; 25 percent krotovinas (lateral area percent); strongly acid, pH 5.5, unspecified; clear smooth boundary. Lab sample # 93P02666. 25% active krotovina; few uncoated sand grains; few 1-1.5 cm chert fragments.; patchy - phpvsfiid 1040098; patchy - phpvsfiid 1040098
    2Btg6—184 to 225 centimeters (72.4 to 88.6 inches); light gray (10YR 7/2) clay; 10 percent red (2.5YR 4/8) medium prominent and 10 percent yellowish red (5YR 4/6) medium prominent mottles; moderate coarse prismatic parts to weak coarse subangular blocky structure; very firm; 0.5 very fine roots; 3.0 very fine pores; faint dark greenish gray (5G 4/1) clay films and 37 percent faint light brownish gray (10YR 6/2) clay films on all faces of peds; 1 percent fine iron-manganese concretions and 1 percent fine spherical iron-manganese concretions; fragments; 15 percent krotovinas (lateral area percent); strongly acid, pH 5.5, unspecified; clear smooth boundary. Lab sample # 93P02667. red mottles are surrounded by strong brown; 15% active krotovina; few uncoated sand grains; few fine chert pebbles; 93P2668.; patchy - phpvsfiid 1040100; patchy - phpvsfiid 1040100
    2Btg7—225 to 270 centimeters (88.6 to 106.3 inches); light brownish gray (10YR 6/2) clay loam; 1 percent yellowish red (5YR 4/6) prominent and 25 percent strong brown (7.5YR 5/8) prominent mottles; weak coarse prismatic parts to weak coarse subangular blocky structure; very firm; 0.5 fine pores; faint clay films on faces of peds and in pores; 1 percent iron-manganese concretions; fragments. Lab sample # 93P02669. course depletion (sand infilling) along prismatic surfaces and krotovina (10-25% krotovina).; patchy - phpvsfiid 1040102; patchy - phpvsfiid 1040102
    2Btg8—270 to 297 centimeters (106.3 to 116.9 inches); light gray (10YR 7/2) clay loam; 25 percent yellowish brown (10YR 5/8) coarse prominent mottles; weak coarse prismatic parts to weak coarse subangular blocky structure; firm; 0.5 fine pores; 15 percent clay films in root channels and/or pores and 15 percent clay films on faces of peds; 1 percent iron-manganese concretions; fragments; 5 percent krotovinas (lateral area percent). Lab sample # 93P02670. 5% krotovina activity; in lower part of horizon, diffuse boundary.; patchy - phpvsfiid 1040104; patchy - phpvsfiid 1040104
    2B—297 to 324 centimeters (116.9 to 127.6 inches); light gray (10YR 7/1) sandy clay loam; 1 percent reddish yellow (7.5YR 7/6) and 10 percent reddish yellow (7.5YR 7/6) coarse prominent and 10 percent red (10R 4/6) coarse prominent mottles; weak coarse prismatic parts to thick platy structure; firm; 0.5 fine pores; 15 percent clay films in root channels and/or pores; 10 percent fine noncoherent cemented iron-manganese concretions; fragments; diffuse boundary. Lab sample # 93P02671. patchy - phpvsfiid 1040105; patchy - phpvsfiid 1040105
    3B—324 to 341 centimeters (127.6 to 134.3 inches); light gray (10YR 7/1) sandy clay loam; 1 percent yellowish red (5YR 5/8) fine prominent and 10 percent yellow (10YR 7/8) medium distinct mottles; weak coarse prismatic parts to thick platy structure; firm; 0.5 fine pores; 1 percent iron-manganese concretions; fragments; diffuse boundary. not sampled.
    4C1—341 to 366 centimeters (134.3 to 144.1 inches); light gray (10YR 7/1) sandy clay loam; 1 percent yellowish red (5YR 5/8) medium prominent mottles; massive parts to thick platy; firm; 0.5 fine pores; 15 percent clay films; 1 percent black (10YR 2/1) iron-manganese concretions; fragments. Lab sample # 93P02672. nearly massive; few krotovina activity.; patchy - phpvsfiid 1040106; patchy - phpvsfiid 1040106
    4C2—366 to 460 centimeters (144.1 to 181.1 inches); light gray (10YR 7/1) fine sandy loam, sandy clay loam; 1 percent yellowish brown (10YR 5/6) prominent and 1 percent yellowish red (5YR 5/6) prominent mottles; 10 percent fine iron-manganese concretions; fragments. Lab sample # 93P02673