LOCATION GARVIN                  OK

Established Series
Rev. VAB:JWF:JLD
07/2018

GARVIN SERIES

The Garvin series consists of deep, moderately well drained, very slowly permeable soils. These level to very gently sloping soils formed in loamy and clayey alluvium sediments of Pleistocene age. These soils occur on narrow to broad nearly level alluvial plains in the Grand Prairie (MLRA 85), and the Central Rolling Red Prairies (MLRA 80A). Slope ranges from 0 to 1 percent. Mean annual air temperature is about 17.2 degrees C (63 degrees F), and mean annual precipitation is about 940 mm (37 in).

TAXONOMIC CLASS: Fine, smectitic, thermic Udertic Haplustolls

TYPICAL PEDON: Garvin silty clay loam-cultivated, at an elevation of 313 m (1026 ft). (Colors are for dry soil unless otherwise stated.)

Ap--0 to 23 cm (0 to 9 in); very dark gray (10YR 3/1) silty clay loam; black (10YR 2/1) moist; weak medium granular structure; very hard, very firm; many fine roots; few fine and medium pores; exchangeable sodium percent is less than 1; neutral; clear smooth boundary. (Thickness of the Ap horizon is 0 to 30 cm [0 to 12 in])

Btk--23 to 81 cm (9 to 32 in); black (10YR 2/1) silty clay; black (10YR 2/1) moist; moderate fine subangular blocky structure; very hard, very firm; common fine roots; few fine and medium pores; few shiny pressure faces below 50 cm (20 in); few fine calcium carbonate concretions; few films of calcium carbonate; exchangeable sodium percent is 4; strongly effervescent; moderately alkaline; gradual wavy boundary. (Thickness of the A horizon is 38 to 114 cm [15 to 45 in])

Btknss--81 to 165 cm (32 to 65 in); reddish brown (5YR 5/3) clay loam; reddish brown (5YR 4/3) moist; weak medium blocky structure; very hard, very firm; few fine roots; few fine pores; few shiny pressure faces on peds; few slickensides that do not intersect; common vertical cracks filled with black (10YR 2/1) silty clay; 5 percent by volume of fine soft bodies and concretions of calcium carbonate; exchangeable sodium percent is 28; calcareous; strongly effervescent; moderately alkaline; gradual smooth boundary. (Thickness of the Bk horizon is 36 to 89 cm [14 to 35 in])

BCkn--165 to 188 cm (65 to 74 in); dark reddish gray (5YR 4/2) clay; dark reddish brown (5YR 3/2) moist; massive; very hard, very firm; few fine roots; few fine pores; 5 percent by volume of fine and medium soft bodies and concretions of calcium carbonate; exchangeable sodium percent is 27; calcareous; strongly effervescent; moderately alkaline.

TYPE LOCATION: Garvin County, Oklahoma; about 12 miles east of Paul's Valley, Oklahoma; 760 feet south and 2,395 feet west of the northeast corner of sec. 16, T. 3 N., R. 3 E.

USGS Topographic Quadrangle: Pauls Valley NE, OK
Latitude: 34 degrees, 44 minutes, 11.25 seconds N
Longitude: 96 degrees, 59 minutes, 35.46 seconds W


Decimal Degrees:
Latitude: 34.736458 degrees
Longitude: -96.993183 degrees
Datum: NAD 83

UTM Easting: 3845651 m
UTM Northing: 683720 m
UTM Zone: 14S

RANGE IN CHARACTERISTICS:
Solum thickness: 75 to more than 150 cm (30 to more than 60 in)
Secondary carbonates: soft powdery lime within 75 cm (30 in) of the soil surface
Vertic features: cracks more than 1 cm wide extend from the surface to depths of about 100 cm (40 in) during some season in most years
Slickensides: range from few to common, but do not intersect

Particle-size control section (weighted average):
Clay content: 35 to 60 percent

Ap horizon:
Hue: 10YR
Value: 2 to 4 dry, 2 or 3 moist
Chroma: 1 to 3 dry, 1 moist
Texture: silty clay loam, clay loam, silty clay, or clay
Clay content: 30 to 60 percent
Exchangeable sodium percentage: 0 to 5 percent
Effervescence: none to strong
Reaction: neutral to moderately alkaline

Btk horizon:
Hue: 10YR
Value: 2 to 4 dry, 2 or 3 moist
Chroma: 1 to 3 dry, 1 moist
Texture: silty clay loam, clay loam, silty clay, or clay
Clay content: 30 to 60 percent
Exchangeable sodium percentage: 0 to 5 percent
Effervescence: none to strong
Reaction: neutral to moderately alkaline

Btknss horizon:
Hue: 5YR or 7.5YR
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 3 to 6 dry, 3 moist
Texture: silty clay loam, clay loam, silty clay, or clay
Clay content: 35 to 60 percent
Linear Extensibility Potential (LEP): exceeds 7
Vertical cracks: filled with material similar to the A horizon
Exchangeable sodium percentage: 10 to 30 percent
Effervescence: none to strong
Reaction: neutral to moderately alkaline

BCkn horizon:
Hue: 5YR or 7.5YR
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 2 to 6 dry, 2 moist
Texture: silty clay loam, clay loam, silty clay, or clay
Clay content: 35 to 60 percent
Vertical cracks: in some pedons, cracks are filled with material similar to the A horizon
Exchangeable sodium percentage: 10 to 30 percent
Effervescence: none to violent
Reaction: neutral to strongly alkaline

COMPETING SERIES: These are Krum and Matoy series in the same family. Soils in similar families are Buxin, Clarita, Deleon, Frio, Lela, Mangum, Miller Moreland, , Nukrum, Pledger, Rioconcho, Roebuck, Volente, and Watonga.
Mangum soils: do not have a mollic epipedon
Buxin, Moreland, Pledger, and Roebuck soils: are in an udic moisture regime
Clarita, Lela, and Watonga soils: do not have a cambic horizon, and have cyclic properties
Frio and Volente soils: have a Linear Extensibility percentage (LEP) of less than 7
Krum and Matoy soils: do not occur on flood plains
Miller soils: have A horizon with hue of 7.5YR or redder
Nukrum soils: have a regular decrease in organic matter with depth and are on uplands
Rioconcho soils: are dry in the moisture control section for longer periods of time.

GEOGRAPHIC SETTING:
Parent material: formed in loamy and clayey alluvium
Landscape: alluvial plains
Landform: flood plains
Slope: 0 to 1 percent
Mean annual precipitation: 864 to 1016 mm (34 to 40 in)
Thornthwaite annual P-E indices: 54 to 64
Mean annual air temperature: 16.7 to 17.8 degrees C (62 to 64 degrees F)
Elevation: 305 to 320 m (1000 to 1050 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: There are the Burleson, Chigley, Durant, Port, Tamford, and Tussy series.
Burleson, Chigley, Durant, Tamford, and Tussy soils: occur on adjacent stream terraces
Port soils: are on similar positions and have less than 35 percent clay content in the control section

DRAINAGE AND PERMEABILITY:
Drainage: well
Permeability: very slow
Runoff: high
Flooding: subject to occasionally flooding for very brief to brief periods, mainly during March to October

USE AND VEGETATION: The principle use is for cropland, and the primary crops
are wheat, grain sorghum, and alfalfa. Some areas are used for tame pasture or rangeland. Native vegetation is mid and tall prairie grasses with small percent of trees. The main trees are pecan, bur oak, American elm, eastern cottonwood and Osage orange.

DISTRIBUTION AND EXTENT:
General area: Oklahoma
Land Resource Region: J-Southwestern Prairies Cotton and Forage Region; H-Central Great Plains Winter Wheat and Range
MLRA 85-Grand Prairie and 80A-Central Rolling Red Prairies
Extent: small

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas

SERIES ESTABLISHED: Murray County, Oklahoma; 1982.

REMARKS:
These soils were formerly included in the Pledger series.

Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: 0 to 81 cm (0 to 32 in) (Ap, Bkss horizon)
Udertic features: LEP of more than 7 in Btknss horizon 81 to 165 cm (32 to 65 in)

Edited 07/2018 (JAD-JLD) Changed to tabular format. Updated pedon description, range in characteristics, and other sections.

ADDITIONAL DATA: none

TAXONOMIC VERSION: Keys to Soil Taxonomy, Twelfth Edition, 2014

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National Cooperative Soil Survey
U.S.A.