HomeSoil seriesSmithdale
Smithdale soil series
Smithdale soils cover 5,695,243 mapped acres, mostly in Mississippi, Alabama and Tennessee. USDA rates shrink-swell a limit for houses without basements on 0% of that land, and a shallow water table a limit for basements on 0%.
It is the leading soil series by area in 39 of the counties and cities on this site, including Tishomingo County, MS; McNairy County, TN; Itawamba County, MS.
SSURGO survey versions to August 5, 2026 · series description revised 2014-12
of its land: shrink-swell limits houses without basements
of its land: a shallow water table limits basements
median highest linear extensibility (6% and up is high)
median highest clay content in the top 150 cm
USDA's description
The Smithdale series consists of very deep, well drained, moderately permeable soils on ridge tops and hill slopes in dissected uplands of the Southern Coastal Plain (MLRA 133A) and in the Western Coastal Plain (133B). They formed in thick beds of loamy marine sediments. Near the type location the average annual temperature is 63 degrees F., and the average annual precipitation is about 57 inches. Slopes range from 1 to 60 percent.
Source: USDA NRCS series description (OSD) for Smithdale, revised 2014-12. Read it.
Engineering properties
| Mapped area (SSURGO) | 5,695,243 acres |
| Shrink-swell limits houses without basements | 0.0% |
| Shallow water table limits basements | 0.0% |
| Very limited for septic absorption fields | 94.0% |
| Most common drainage class | Well drained |
| Most common hydrologic soil group | B |
| Taxonomic class | Fine-loamy, siliceous, subactive, thermic Typic Hapludults |
| Type location | Wayne County, Mississippi. Approximately 7.0 miles northeast Waynesboro |
Where Smithdale is mapped
| State | Mapped acres |
|---|---|
| Mississippi | 3,017,326 |
| Alabama | 1,280,835 |
| Tennessee | 662,160 |
| Louisiana | 356,547 |
| Arkansas | 323,573 |
| Kentucky | 30,347 |
| Texas | 12,678 |
| Oklahoma | 11,671 |
| Florida | 106 |
Places where Smithdale leads
Counties and cities where Smithdale covers more mapped land than any other series.
Other places where Smithdale is a main soil
Counties and cities where Smithdale is among the six soil series covering the most mapped land, but not the first. Share of the place's mapped land.
Counties
- Walthall County, MS 22%
- Carroll County, TN 20%
- Amite County, MS 19%
- Stone County, MS 18%
- Lawrence County, MS 17%
- Newton County, MS 16%
- Madison County, TN 16%
- Choctaw County, AL 16%
- Winston County, MS 16%
- Henderson County, TN 15%
- Rankin County, MS 14%
- Kemper County, MS 14%
- Neshoba County, MS 13%
- Perry County, MS 12%
- Dallas County, AR 11%
- Pike County, MS 11%
- Pearl River County, MS 11%
- Washington Parish, LA 11%
- Carroll County, MS 11%
- Webster County, MS 10%
- Jasper County, MS 10%
- Lauderdale County, MS 10%
- Alcorn County, MS 10%
- Union County, AR 9%
- Jefferson County, MS 8%
- Franklin County, AL 7%
- LaSalle Parish, LA 7%
- Scott County, MS 7%
- Holmes County, MS 7%
- Madison County, MS 6%
- Saline County, AR 6%
- Chickasaw County, MS 6%
- East Feliciana Parish, LA 6%
- Wilkinson County, MS 6%
- Monroe County, MS 6%
- Lincoln County, AR 6%
- St. Helena Parish, LA 6%
- Columbia County, AR 5%
- Catahoula Parish, LA 4%
- Wilcox County, AL 4%
Sources
Shares and properties: USDA NRCS SSURGO via Soil Data Access, weighted by each component's share of its map units. Description: the USDA NRCS series description. How we count.