Graham County, Kansas
The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. 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 Graham County, Kansas. 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 |
|---|---|---|---|---|---|
| Holdrege silt loam, 1 to 3 percent slopes, plains and breaks | 159K | Well drained | C | Not limited | Very limited |
| Penden-Uly complex, 7 to 20 percent slopes | 93K | Well drained | B | Somewhat limited | Somewhat limited |
| Uly silt loam, 3 to 6 percent slopes | 80K | Well drained | B | Not limited | Somewhat limited |
| Coly silt loam, 3 to 6 percent slopes | 41K | Well drained | B | Not limited | Somewhat limited |
| Coly silt loam, 6 to 20 percent slopes | 25K | Well drained | B | Somewhat limited | Somewhat limited |
| Humbarger loam, channeled | 22K | Well drained | B | Very limited | Very limited |
| Penden-Canlon loams, 7 to 30 percent slopes | 17K | Well drained | B | Very limited | Very limited |
| Wakeen-Nibson complex, 5 to 20 percent slopes | 16K | Well drained | C | Somewhat limited | Very limited |
| Penden loam, 3 to 7 percent slopes | 14K | Well drained | B | Not limited | Somewhat limited |
| Humbarger loam, occasionally flooded | 13K | Well drained | B | Very limited | Very limited |
| Penden clay loam, 3 to 7 percent slopes, eroded | 13K | Well drained | B | Not limited | Somewhat limited |
| Holdrege silt loam, 0 to 1 percent slopes, plains and breaks | 11K | Well drained | C | Not limited | Very limited |
| Uly silt loam, 6 to 11 percent slopes | 10K | Well drained | B | Not limited | Somewhat limited |
| Hord silt loam, rarely flooded | 8K | Well drained | B | Very limited | Somewhat limited |
| Munjor sandy loam, occasionally flooded | 7K | Well drained | A | Very limited | Very limited |
| Bridgeport silt loam, rarely flooded | 6K | Well drained | B | Very limited | Somewhat limited |
| Wakeen-Nibson silt loams, 3 to 7 percent slopes | 6K | Well drained | C | Somewhat limited | Very limited |
| Campus-Canlon complex, 3 to 30 percent slopes | 6K | Well drained | C | Very limited | Very limited |
| Uly-Penden complex, 6 to 20 percent slopes | 5K | Well drained | B | Somewhat limited | Somewhat limited |
| Inavale sand, channeled | 4K | 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
Most soils are generally favorable for residential construction. Standard foundations are usually viable, though site-specific evaluation is always recommended.
Septic Systems
About 47% of soils have significant septic limitations, while others are more suitable. A perc test is essential — conditions vary across the area.
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.