| French Water Data Network |  |
| Global Soil Physics Data base | |
| Hydrogeology | |
| National Soil Erosion Research Laboratory (USA) | |
| Project Soil (from New Mexico) | |
| Soil Compaction and Drainage | |
| Soil Microbiology | |
| Soil Physics | |
| Soil Physics Teaching Sites | |
| Soil Taxonomy | |
| Soils Online | |