Marshall County, Oklahoma
The dominant drainage class is Well drained and the dominant hydrologic group is D (very slow infiltration, high runoff). 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 Marshall County, Oklahoma.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Water | 38K | D | Not rated | Not rated | |
| Swink very cobbly clay loam, 2 to 15 percent slopes | 24K | Well drained | C | Very limited | Very limited |
| Konsil fine sandy loam, 8 to 15 percent slopes | 23K | Well drained | B | Somewhat limited | Somewhat limited |
| Purves clay, 3 to 5 percent slopes | 22K | Well drained | D | Very limited | Very limited |
| Ferris clay, 3 to 5 percent slopes, eroded | 17K | Well drained | D | Very limited | Very limited |
| Ferris-Tarrant complex, 5 to 12 percent slopes | 16K | Well drained | D | Very limited | Very limited |
| Konsil fine sandy loam, 1 to 5 percent slopes, eroded | 14K | Well drained | B | Somewhat limited | Somewhat limited |
| Konsil fine sandy loam, 1 to 5 percent slopes, gullied | 12K | Well drained | B | Somewhat limited | Somewhat limited |
| Durant loam, 1 to 3 percent slopes | 10K | Moderately well drained | D | Very limited | Very limited |
| Durant clay loam, 1 to 5 percent slopes, eroded | 10K | Moderately well drained | D | Very limited | Very limited |
| Konawa fine sandy loam, 3 to 8 percent slopes, gullied | 9K | Well drained | A | Not limited | Very limited |
| Heiden stony clay, 2 to 5 percent slopes | 8K | Well drained | D | Very limited | Very limited |
| Burleson clay, 1 to 3 percent slopes | 8K | Moderately well drained | D | Very limited | Very limited |
| Dougherty loamy fine sand, 0 to 3 percent slopes | 8K | Well drained | B | Not limited | Very limited |
| Heiden clay, 2 to 5 percent slopes | 8K | Well drained | D | Very limited | Very limited |
| Konsil fine sandy loam, 3 to 5 percent slopes | 8K | Well drained | B | Somewhat limited | Somewhat limited |
| Konawa fine sandy loam, 1 to 5 percent slopes, eroded | 7K | Well drained | A | Not limited | Very limited |
| Frioton silty clay loam, 0 to 1 percent slopes, occasionally flooded | 6K | Well drained | C | Very limited | Very limited |
| Madill fine sandy loam, 0 to 1 percent slopes, occasionally flooded | 5K | Well drained | B | Very limited | Very limited |
| Bastrop fine sandy loam, 1 to 3 percent slopes | 4K | Well drained | B | Not limited | Somewhat limited |
What This Means
Building & Foundations
About 52% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 61% 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
Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.