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: 11/27/2024

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