IDENTIFIERS

Current Taxon Name (Soil Name): RACOMBES

OSD

Series Extent

User Site ID: S1997TX489004

User Pedon ID: 97TX489004

Vegetation Plot ID: S1997TX489004

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - SSL

Lab Pedon # - 98P0181

NCSS Pedon Lab Data NASIS Record ID - 10452

Print Date: 11/21/2024

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: 26.3963890

Std. Longitude: -97.7122192

Datum: WGS84

Location Description: From the junction of US 77 and FR 489, go east on FR 489 4.5 miles to field drainage ditch road, 0.3 miles south on the drainage ditch road then 300 feet west into cropland.

State: Texas

County: TX489—Willacy

MLRA: 83D—Lower Rio Grande Plain

Non-MLRA Soil Survey Area: TX489—Willacy County, Texas

7.5 Minute USGS Quad: 26097-D6—San Perlita South, Texas

PEDON

Describers Name: R. Molina, P. Holland, M. Golden, D. Brezina, S. Dunn, A. Stahnke

Current Taxon Kind: miscellaneous area

Pedon Type: not classified to current taxon name

Pedon Purpose: research site

Pedon Record Orgin: Converted from PDP 3.x

Pedon #: 4

Sampled As Information:

Soil Name - RACOMBES

Taxonomic Class - Fine, mixed Pachic Argiustolls

PSC - 30 to 80 cm.

Classificaton Date - 12/3/1997

Moisture Class - ustic

Dynamic Soil Properties:

Erosion Class - 0

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Landscape: coastal plain

Landform: coastal plain

Anthropogenic Feature: leveled land

Runoff: negligible

Drainage Class: moderately well

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 12/3/1997 (actual site observation date)

Air Photo ID: A.S. 24

Surface Cover Properties:

Site Obs. Cover Kind 1 - crop cover

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
SOBIB SOBIB	Sorghum bicolor ssp. bicolor Sorghum bicolor ssp. bicolor	grain sorghum grain sorghum	— —	— —	— —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
mollic epipedon argillic horizon calcic horizon gypsic horizon	0—59 30—200 93—200 121—193	—- —- —- —-

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	—	—	9	—		700	—	—	23	26	16	—	—	—	—	—	—	—	—

Ap1—0 to 17 centimeters (0.0 to 6.7 inches);, very dark grayish brown (10YR 3/2), moist; sandy clay loam; weak fine and medium subangular blocky parts to weak fine granular structure; very friable; 21.0 very fine and fine roots throughout and 3.0 medium roots throughout; 21.0 very fine and fine pores; 3 percent medium cylindrical worm casts throughout; fragments; noneffervescent; moderately alkaline, pH 8.2, hellige-truog; abrupt smooth boundary. Lab sample # 98P01146. 5% by volume, irregular, randomly mixed, 10YR 6/4, sand lenses.

Ap2—17 to 30 centimeters (6.7 to 11.8 inches);, very dark gray (10YR 3/1), moist; sandy clay loam; moderate fine and medium subangular blocky structure; friable; 21.0 very fine and fine roots throughout and 3.0 medium roots throughout; 21.0 very fine and fine pores; fragments; noneffervescent; moderately alkaline, pH 8.2, hellige-truog; abrupt smooth boundary. Lab sample # 98P01147. 10% by volume, irregular, randomly mixed, 10YR 6/4, sand lenses.

Bt—30 to 59 centimeters (11.8 to 23.2 inches);, very dark grayish brown (10YR 3/2), moist; sandy clay; 1 percent gray (10YR 5/1) fine faint mottles; moderate fine and medium subangular blocky structure; firm; 21.0 very fine and fine roots throughout and 3.0 medium roots throughout; 21.0 very fine and fine and 3.0 medium pores; 10 percent faint very dark grayish brown (10YR 3/2) clay films on faces of peds; 3 percent fine and medium spherical carbonate concretions throughout and 3 percent medium and coarse cylindrical black (10YR 2/1) worm casts throughout; fragments; noneffervescent; moderately alkaline, pH 8.2, hellige-truog; gradual smooth boundary. Lab sample # 98P01148. 2% by volume, 10YR 6/4, sand lenses along ped faces.; discontinuous - phpvsfiid 202958; discontinuous - phpvsfiid 202958

Btkyz1—59 to 93 centimeters (23.2 to 36.6 inches);, 50 percent brown (7.5YR 4/3) and 50 percent very dark grayish brown (10YR 3/2), moist; sandy clay; moderate coarse prismatic parts to moderate medium and coarse angular blocky structure; very firm; 21.0 very fine and fine roots throughout; 21.0 very fine and fine and 21.0 medium and 3.0 coarse pores; 30 percent faint dark reddish brown (5YR 3/2) clay films on faces of peds; 3 percent fine spherical salt masses between peds and 3 percent fine and medium spherical carbonate concretions throughout and 3 percent fine and medium irregular noncoherent cemented carbonate masses throughout and 1 percent medium cylindrical worm casts throughout; fragments; strong effervescence; moderately alkaline, pH 8.2, hellige-truog; gradual smooth boundary. Lab sample # 98P01149. 2% by volume, 10YR 6/4, sand lenses along ped faces.; continuous - phpvsfiid 202959; continuous - phpvsfiid 202959

Btkyz2—93 to 121 centimeters (36.6 to 47.6 inches);, 90 percent brown (7.5YR 4/4) and 10 percent dark brown (7.5YR 3/2), moist; clay loam; moderate fine and medium subangular blocky structure; friable; 3.0 very fine and fine roots throughout; 21.0 very fine and fine and 21.0 medium and 3.0 coarse pores; 10 percent faint brown (7.5YR 4/4) clay films on faces of peds; 3 percent fine irregular noncoherent cemented carbonate masses throughout and 3 percent fine threadlike salt masses between peds and 1 percent fine irregular gypsum crystals, unspecified between peds and 3 percent fine and medium cylindrical worm casts throughout and 3 percent medium spherical carbonate concretions throughout; fragments; violent effervescence; moderately alkaline, pH 8.2, hellige-truog; gradual smooth boundary. Lab sample # 98P01150. discontinuous - phpvsfiid 202960; discontinuous - phpvsfiid 202960

Btkyz3—121 to 193 centimeters (47.6 to 76.0 inches);, brown (7.5YR 5/4), moist; clay loam; weak coarse prismatic parts to moderate fine and medium subangular blocky structure; friable; 21.0 very fine and fine and 3.0 medium pores; 10 percent faint brown (7.5YR 4/4) clay films on faces of peds; 3 percent fine spherical salt masses throughout and 3 percent fine irregular gypsum crystals, unspecified throughout and 3 percent fine and medium spherical carbonate concretions throughout and 3 percent fine and medium cylindrical worm casts throughout and 3 percent fine and medium irregular noncoherent cemented carbonate masses throughout; fragments; violent effervescence; moderately alkaline, pH 8.2, hellige-truog; gradual smooth boundary. Lab sample # 98P01151. discontinuous - phpvsfiid 202961; discontinuous - phpvsfiid 202961

Btkyz4—193 to 200 centimeters (76.0 to 78.7 inches);, brown (7.5YR 5/4), moist; clay loam; weak coarse prismatic parts to weak medium subangular blocky structure; friable; 21.0 very fine and fine and 3.0 medium pores; 10 percent faint brown (7.5YR 5/4) clay films on faces of peds; 1 percent fine spherical salt masses throughout and 3 percent fine irregular gypsum crystals, unspecified throughout and 1 percent fine and medium cylindrical worm casts throughout and 3 percent fine and medium irregular noncoherent cemented carbonate masses throughout and 3 percent medium spherical carbonate concretions throughout; fragments; violent effervescence; moderately alkaline, pH 8.2, hellige-truog; gradual smooth boundary. Lab sample # 98P01152. patchy - phpvsfiid 201523; patchy - phpvsfiid 201523