Premont soil series
A representative soil profile of Premont fine sandy loam, 0 to 3 percent slopes. This soil is used for crop and forage production in the county. The rounded shape and the downward weathering pattern of the calcium carbonates nodules at a depth of 1 meter, suggests the parent material was deposited by alluvial processes. (Soil Survey of Duval County, Texas; by John L. Sackett III, Natural Resources Conservation Service)
The Premont series consists of very deep, moderately permeable, well drained soils that have formed in loamy sediments over calcareous loamy alluvium of Quaternary age. These nearly level to gently sloping soils are on crests on paleoterraces. Slope ranges from 0 to 3 percent. The mean annual temperature is about 22.2 degrees C (72 degrees F), and the mean annual precipitation is about 660 mm (26 in).
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, hyperthermic Typic Haplustalfs
Soil Moisture: An ustic moisture regime. The soil moisture control section is dry in some or all parts for more than 90 but less than 180 cumulative days in normal years. June through August and December through February are the driest months. These soils are intermittently moist in September through November and March through May.
Mean annual soil temperature: 22.2 to 23.4 degrees C (72 to 74 degrees F).
Depth to secondary calcium carbonates: 74 to 152 cm (29 to 60 in).
Particle-size control section (weighted average): Clay content: 17 to 32 percent.
Some pedons have mollic colors but do not have enough organic carbon to meet the requirements for a mollic epipedon.
USE AND VEGETATION: The major uses are crop production, livestock grazing, and wildlife habitat. Grasses present include false rhodesgrass, Kleberg bluestem, plains bristlegrass, shortspike windmillgrass, and guineagrass. Woody vegetation consists of mesquite, catclaw, elbowbush, limepricklyash, pricklypear, granjeno, and tasajillo. Crops grown include grain sorghum, watermelons and cotton. Sandy Loam (R083AY407TX).
DISTRIBUTION AND EXTENT: Northern Rio Grande Plain (MLRA 83A in LRR I) of southern Texas. The series is of moderate extent.
The Premont soils were formerly included in the Delfina series. Future study is needed to verify the calcic horizon of these soils. The calcium carbonate masses appear to be degrading petrocalcic fragments and are being removed from the soil matrix. This is characterized by the sharp boundaries of the soft material surrounding, in some cases, nodules that vary in size. These are mostly in the lower materials below the lithologic discontinuity.
For additional information about the survey area, visit:
www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/texas/TX131/Du...
For a detailed soil description, visit:
soilseries.sc.egov.usda.gov/OSD_Docs/P/PREMONT.html
For acreage and geographic distribution, visit:
casoilresource.lawr.ucdavis.edu/see/#premont
Premont soil series
A representative soil profile of Premont fine sandy loam, 0 to 3 percent slopes. This soil is used for crop and forage production in the county. The rounded shape and the downward weathering pattern of the calcium carbonates nodules at a depth of 1 meter, suggests the parent material was deposited by alluvial processes. (Soil Survey of Duval County, Texas; by John L. Sackett III, Natural Resources Conservation Service)
The Premont series consists of very deep, moderately permeable, well drained soils that have formed in loamy sediments over calcareous loamy alluvium of Quaternary age. These nearly level to gently sloping soils are on crests on paleoterraces. Slope ranges from 0 to 3 percent. The mean annual temperature is about 22.2 degrees C (72 degrees F), and the mean annual precipitation is about 660 mm (26 in).
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, hyperthermic Typic Haplustalfs
Soil Moisture: An ustic moisture regime. The soil moisture control section is dry in some or all parts for more than 90 but less than 180 cumulative days in normal years. June through August and December through February are the driest months. These soils are intermittently moist in September through November and March through May.
Mean annual soil temperature: 22.2 to 23.4 degrees C (72 to 74 degrees F).
Depth to secondary calcium carbonates: 74 to 152 cm (29 to 60 in).
Particle-size control section (weighted average): Clay content: 17 to 32 percent.
Some pedons have mollic colors but do not have enough organic carbon to meet the requirements for a mollic epipedon.
USE AND VEGETATION: The major uses are crop production, livestock grazing, and wildlife habitat. Grasses present include false rhodesgrass, Kleberg bluestem, plains bristlegrass, shortspike windmillgrass, and guineagrass. Woody vegetation consists of mesquite, catclaw, elbowbush, limepricklyash, pricklypear, granjeno, and tasajillo. Crops grown include grain sorghum, watermelons and cotton. Sandy Loam (R083AY407TX).
DISTRIBUTION AND EXTENT: Northern Rio Grande Plain (MLRA 83A in LRR I) of southern Texas. The series is of moderate extent.
The Premont soils were formerly included in the Delfina series. Future study is needed to verify the calcic horizon of these soils. The calcium carbonate masses appear to be degrading petrocalcic fragments and are being removed from the soil matrix. This is characterized by the sharp boundaries of the soft material surrounding, in some cases, nodules that vary in size. These are mostly in the lower materials below the lithologic discontinuity.
For additional information about the survey area, visit:
www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/texas/TX131/Du...
For a detailed soil description, visit:
soilseries.sc.egov.usda.gov/OSD_Docs/P/PREMONT.html
For acreage and geographic distribution, visit:
casoilresource.lawr.ucdavis.edu/see/#premont