Robertson County, Tennessee
The most common soil here is Sengtown, on about 22% of the land: a gravelly silt loam, smooth, like flour. Mountview and Pembroke come next.
About 68% of the land drains well, and 4% stays wet for long stretches; groundwater comes within two feet of the surface under 15% of it.
USDA rates 56% of the land very limited for a standard septic drain field, and 56% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 12% 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 Robertson County, Tennessee, 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 Ultisols — strongly weathered soils with clay-enriched subsoils, common in warm humid climates. 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 Robertson County, Tennessee. 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 |
|---|---|---|---|---|---|
| Sengtown gravelly silt loam, 5 to 12 percent slopes | 46K | Well drained | B | Not limited | Somewhat limited |
| Sengtown gravelly silt loam, 12 to 20 percent slopes | 28K | Well drained | B | Very limited | Very limited |
| Dickson silt loam, 2 to 5 percent slopes, eastern phase | 27K | Moderately well drained | C/D | Very limited | Very limited |
| Pembroke silt loam, 2 to 6 percent slopes | 22K | Well drained | B | Somewhat limited | Somewhat limited |
| Mountview silt loam, 2 to 5 percent slopes | 19K | Moderately well drained | C | Very limited | Very limited |
| Staser silt loam | 18K | Well drained | B | Very limited | Very limited |
| Pembroke silt loam, 6 to 12 percent slopes, eroded | 16K | Well drained | B | Somewhat limited | Somewhat limited |
| Hamblen silt loam | 12K | Moderately well drained | C | Very limited | Very limited |
| Crider silt loam, 2 to 6 percent slopes | 12K | Well drained | B | Somewhat limited | Somewhat limited |
| Mountview silt loam, 5 to 12 percent slopes | 12K | Moderately well drained | C | Very limited | Very limited |
| Bodine gravelly silt loam, 20 to 40 percent slopes | 10K | Somewhat excessively drained | A | Very limited | Very limited |
| Pickwick silty clay loam, 5 to 12 percent slopes, severely eroded | 7K | Well drained | B | Somewhat limited | Somewhat limited |
| Baxter cherty silty clay loam, 12 to 20 percent slopes, severely eroded | 7K | Well drained | B | Very limited | Very limited |
| Baxter cherty silty clay loam, 5 to 12 percent slopes severely eroded | 7K | Well drained | B | Somewhat limited | Somewhat limited |
| Sango silt loam, 0 to 2 percent slopes | 6K | Moderately well drained | C/D | Very limited | Very limited |
| Dewey silty clay loam, 5 to 12 percent slopes, severely eroded | 5K | Well drained | B | Somewhat limited | Somewhat limited |
| Guthrie silt loam, 0 to 2 percent slopes, frequently ponded | 5K | Poorly drained | C/D | Very limited | Very limited |
| Taft silt loam, 0 to 2 percent slopes | 5K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Baxter cherty silt loam, 20 to 30 percent slopes | 4K | Well drained | B | Very limited | Very limited |
| Bodine gravelly silt loam, 12 to 20 percent slopes | 3K | Somewhat excessively drained | A | 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 56% 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 56% 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.