IDENTIFIERS

Current Taxon Name (Soil Name): Mailtrail

OSD

Series Extent

User Site ID: S1991TX137001

User Pedon ID: 91TX137001

Vegetation Plot ID: S1991TX137001

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - SSL

Lab Pedon # - 91P0511

NCSS Pedon Lab Data NASIS Record ID - 63553

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: 30.1913280

Std. Longitude: -100.6603928

Datum: WGS84

Location Description: From junction of US Highway 277 and Texas Highway 55 in northwestern Edwards County, 6.4 miles south on US Highway 277 to entrance of Earwood Ranch, 1.75 miles east and south on a graded ranch road, 56 feet southeast of road centerline in rangeland

Map Unit: MaD—Mailtrail very gravelly clay loam, 1 to 8 percent slopes

State: Texas

County: TX137—Edwards

MLRA: 81B—Edwards Plateau, Central Part

Non-MLRA Soil Survey Area: TX607—Edwards and Real Counties, Texas

7.5 Minute USGS Quad: 30100-B6—Turney Draw NW, Texas

PEDON

Describers Name: Wayne J. Gabriel and Lynn E. Loomis. Sampled by Mike Golden and Benny Brasher

Current Taxonomic Class: Loamy-skeletal, carbonatic, thermic, shallow Petrocalcic Calciustolls

Current Taxon Kind: series

Pedon Type: OSD pedon

Pedon Purpose: full pedon description

Pedon Record Orgin: Converted from SSL-CMS data

Pedon #: 1

Correlated Information:

Soil Name - Mailtrail

PSC - 25 to 38 cm.

Classificaton Date - 12/6/2007

Moisture Class - ustic

Sampled As Information:

Soil Name - Mailtrail

Taxonomic Class - Loamy-skeletal, carbonatic, thermic Petrocalcic Ca

Taxon Kind - series

Classificaton Date - 2/1/1991

Moisture Class - ustic

Dynamic Soil Properties:

Erosion Class - 2

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Landscape: river valley

Landform: fluvial terrace

Geomorphic Component Hills: side slope

Hill Slope Profile: shoulder

Slope Shape Across: concave

Slope Shape Down: convex

Runoff: high

Drainage Class: well

Bedrock: conglomerate, calcareous with 45 to <100

Surface Fragments: 50.00 percent 2- to 20-millimeter 9.00 percent 20- to 75-millimeter 1.00 percent 250- to 600-millimeter 20.00 percent 75- to 250-millimeter

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 2/1/1991 (actual site observation date)

Microrelief Elevation: 10

Surface Cover Properties:

Site Obs. Cover Kind 1 - grass/herbaceous cover

Site Obs. Cover Kind 2 - rangeland, savanna

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Site Erosion Accelerated: water erosion

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
ADENO5 ARIST BOTR2 CELTI COVI8 DICOC DITE3 ERPI5 KALA MATR3 NOTE OPUNT QUVI VEPO4	Adenophyllum Aristida Bouteloua trifida Celtis Condalia viridis Digitaria cognata var. cognata Diospyros texana Erioneuron pilosum Kalmia latifolia Mahonia trifoliolata Nolina texana Opuntia Quercus virginiana Verbena polystachya	dogweed threeawn red grama hackberry green snakewood Carolina crabgrass Texas persimmon hairy woollygrass mountain laurel algerita Texas sacahuista pricklypear live oak verbena	— — — — — — — — — — — — — —	— — — — — — — — — — — — — —	— — — — — — — — — — — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
calcic horizon mollic epipedon petrocalcic horizon	0—152 0—38 38—152	—- —- —-

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
6	46	30.5	631	—	225	559	—	—	18.3	26.7	8.9	—	—	—	—	—	TX425	Sonora, Texas	Official U.S.

A1—0 to 15 centimeters (0.0 to 5.9 inches); 16 percent very pale brown (10YR 8/2) and 19 percent very pale brown (10YR 7/4) and 55 percent very dark grayish brown (10YR 3/2), 16 percent very pale brown (10YR 8/2) and 19 percent very pale brown (10YR 8/4) and 55 percent dark grayish brown (10YR 4/2), dry; very gravelly loam; weak medium subangular blocky, and moderate very fine and fine granular structure; slightly hard, very friable, slightly sticky, slightly plastic; 5.5 very fine and fine roots throughout and 0.5 medium and coarse roots throughout; 2.5 very fine and fine interstitial and tubular pores; 45 percent by volume 2-39-75 millimeter chert fragments; strong effervescence, by hcl, 1n; slightly alkaline, pH 7.6, hellige-truog; clear wavy boundary. Lab sample # 91P02939. 18% rock fragments 2-20 mm diameter; 27% rock fragments 20-75 mm diameter; rock fragments are clasts from a degrading petrocalcic horizon; few medium and coarse roots throughout; many very fine and fine roots throughout; effervescence is continuous

A2—15 to 38 centimeters (5.9 to 15.0 inches); 30 percent very dark gray (10YR 3/1) and 70 percent very pale brown (10YR 8/2), 30 percent dark gray (10YR 4/1) and 70 percent very pale brown (10YR 8/2), dry; extremely cobbly loam; weak medium subangular blocky, and moderate very fine granular structure; slightly hard, very friable, slightly sticky, slightly plastic; 2.5 very fine and fine roots around fragments and 0.5 very coarse roots around fragments; 2.5 very fine and fine interstitial and tubular pores; 10 percent by volume 2-39-75 millimeter chert fragments and 35 percent by volume 75-162-250 millimeter chert fragments and 35 percent by volume 250-425-600 millimeter chert fragments; strong effervescence, by hcl, 1n; slightly alkaline, pH 7.6, hellige-truog; abrupt wavy boundary. Lab sample # 91P02940. 5% rock fragments 2-20 mm diameter; 5% rock fragments 20-75 mm diameter; rock fragments are clasts from a degrading petrocalcic horizon and have laminations on upper and lower surfaces; fragments are more etched and pitted on the lower surfa; few very coarse roots matted around stones; common very fine and fine roots matted around stones; effervescence is continuous

Bkm1—38 to 51 centimeters (15.0 to 20.1 inches); 10 percent reddish yellow (7.5YR 7/6) and 4 percent brown (10YR 5/3) and 86 percent white (10YR 8/1), 10 percent reddish yellow (7.5YR 7/6) and 4 percent brown (10YR 5/3) and 86 percent white (10YR 8/1), dry; unweathered bedrock; massive; fragments; strong effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 91P02941. indurated by lime; few thin very pale brown (10YR 8/4), very pale brown (10YR 7/5) moist, laminae within horizon; few remnant limestone lithoclasts (fragments) observed; brown (10YR 5/3) laminar cap 12 mm thick at upper surface; effervescence is continuous

Bkm2—51 to 81 centimeters (20.1 to 31.9 inches); very pale brown (10YR 8/2), very pale brown (10YR 8/2), dry; unweathered bedrock; massive; fragments; violent effervescence, by hcl, 1n; clear wavy boundary. Lab sample # 91P02942. strongly cemented by lime; a thin very dark brown (10YR 2/2) brown band containing few very fine and fine, and common medium to very coarse roots, and decaying cedar roots occurs in middle part of horizon; few remnant limestone lithoclasts o; effervescence is continuous

Bkm3—81 to 109 centimeters (31.9 to 42.9 inches); 35 percent pink (7.5YR 7/3) and 65 percent very pale brown (10YR 8/2), 35 percent pink (7.5YR 7/3) and 65 percent very pale brown (10YR 8/2), dry; weathered bedrock; massive; 2 percent by volume 2-39-75 millimeter limestone, unspecified fragments; violent effervescence, by hcl, 1n. Lab sample # 91P02943. lime; 55% weakly cemented, 45% strongly cemented in discontinuous strata 7.5-15 cm thick, mainly in lower part of horizon; 1.5% limestone pebbles, 0.5% chert pebbles; some limestone fragments are nearly completely weathered; arbitrary lower; effervescence is continuous

Bkm4—109 to 152 centimeters (42.9 to 59.8 inches); 35 percent pink (7.5YR 7/3) and 65 percent very pale brown (10YR 8/2), 35 percent pink (7.5YR 7/3) and 65 percent very pale brown (10YR 8/2), dry; weathered bedrock; 2 percent by volume 2-39-75 millimeter limestone, unspecified fragments; violent effervescence, by hcl, 1n. Lab sample # 91P02944. same properties as Bkm3, sampled separately for laboratory characterization