Marshall County, Oklahoma
The most common soil here is Konsil, on about 21% of the land: a fine sandy loam, gritty and crumbly. Ferris and Swink come next.
About 74% of the land drains well.
USDA rates 63% of the land very limited for a standard septic drain field, and 53% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 5% of the land floods occasionally or more, and bedrock lies within 40 inches under 24% of it.
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 Marshall County, Oklahoma, 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 D (very slow infiltration, high runoff). 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 Marshall County, Oklahoma. 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 |
|---|---|---|---|---|---|
| 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 |
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 53% 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 63% 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.