Benton County, Mississippi
The most common soil here is Smithdale, on about 24% of the land: a fine sandy loam, gritty and crumbly. Providence and Lexington come next.
About 62% of the land drains well, and 11% stays wet for long stretches; groundwater comes within two feet of the surface under 40% of it.
USDA rates 99% of the land very limited for a standard septic drain field, and 94% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 15% of the land floods occasionally or more.
Soils change over short distances, so look up an address below for the soil at that exact spot and the reasons behind each rating.
The soils you're most likely standing on
The biggest named soils in Benton County, Mississippi, each drawn five feet deep from its official USDA description, in its recorded colors.
Dots mark gravel; white flecks mark lime. Shares are by acres across the survey area, and each mapped patch usually mixes several of these soils.
The biggest mapped areas
The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). The most common soil order is Alfisols — moderately leached forest soils with a clay-enriched subsoil. This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in Benton County, Mississippi. Search your address to find the exact soil composition, drainage, and series details at your specific location.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Smithdale and Toinette soils, 20 to 45 percent slopes | 76K | Well drained | B | Very limited | Very limited |
| Smithdale-Sweatman-Providence association, 12 to 35 percent slopes | 47K | Well drained | B | Very limited | Very limited |
| Udorthents-Lexington complex, 5 to 25 percent slopes, severely eroded | 33K | Moderately well drained | B | Very limited | Very limited |
| Gillsburg silt loam | 15K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Ariel silt loam | 11K | Well drained | C | Very limited | Very limited |
| Lexington silt loam, 2 to 5 percent slopes, moderately eroded | 11K | Well drained | B | Not limited | Very limited |
| Providence silt loam, 8 to 12 percent slopes, moderately eroded | 9K | Moderately well drained | D | Very limited | Very limited |
| Smithdale-Lexington complex, 12 to 17 percent slopes, eroded | 9K | Well drained | B | Very limited | Very limited |
| Providence silt loam, 2 to 5 percent slopes, eroded | 9K | Moderately well drained | C/D | Very limited | Very limited |
| Arkabutla silt loam, 0 to 2 percent slopes, rarely flooded | 7K | Somewhat poorly drained | D | Very limited | Very limited |
| Providence silt loam, 5 to 8 percent slopes, moderately eroded | 6K | Moderately well drained | D | Very limited | Very limited |
| Jena and Ochlockonee soils | 5K | Well drained | B | Very limited | Very limited |
| Oaklimeter silt loam, 0 to 2 percent slopes, occasionally flooded, north | 5K | Moderately well drained | C | Very limited | Very limited |
| Lexington silt loam, 5 to 8 percent slopes, moderately eroded | 4K | Well drained | B | Not limited | Very limited |
| Loring silt loam, 2 to 5 percent slopes | 3K | Moderately well drained | D | Very limited | Very limited |
| Calhoun silt loam | 3K | Poorly drained | C/D | Very limited | Very limited |
| Grenada silt loam, 2 to 5 percent slopes | 2K | Moderately well drained | C/D | Very limited | Very limited |
| Water | 2K | Not rated | Not rated | ||
| Calloway silt loam, 0 to 2 percent slopes | 2K | Somewhat poorly drained | D | Very limited | Very limited |
| Mantachie and Kirkville soils | 2K | Somewhat poorly drained | B/D | Very limited | Very limited |
Soil Orders in This Area
The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.
What This Means
Building & Foundations
About 94% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 99% of soils are rated "very limited" for septic absorption fields. Despite good drainage overall, limitations may stem from shallow bedrock, steep slopes, or seasonal conditions. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.