Soil - Electrical Resistivity
Types of soil and resistivity.
The resistivity values of soil may be useful when designing earth-electrode systems.
| Soil | Mean Value of Resistivity (ohm m, Ω m) |
|---|---|
| Clay, compacted | 100 - 200 |
| Clay, soft | 50 |
| Clayely sand | 50 - 500 |
| Humus, leaf mold | 10 - 150 |
| Granite | 1500 - 10000 |
| Granite, modified | 100 - 600 |
| Jurassic marl | 30 - 40 |
| Limestone, fissured | 500 - 1000 |
| Marl | 100 - 200 |
| Mica schist | 800 |
| Peat, turf | 5 - 100 |
| Sandstone | 1500 - 10000 |
| Sandstone, modified | 100 - 600 |
| Shist, shale | 50 - 300 |
| Siliceous sand | 200 - 300 |
| Soil, chalky | 100 - 300 |
| Soil, swampy | 1 - 30 |
| Stony sub-soil, grass-covered | 300 - 500 |
| Stony ground | 1500 - 3000 |
