| Askov Long-Term Experiments | Subnetwork |
| DIRT - Detritus Input and Removal Treatments | Subnetwork |
| Hungarian long-term fertilizer experimental network | Subnetwork |
| ILTER - International Long Term Ecological Research | Subnetwork |
| IOSDV - International organic nitrogen long-term fertilization experiment | Subnetwork |
| Long-term Tillage Study - Northwest ARS | Subnetwork |
| LTER - U.S. Long Term Ecological Research | Subnetwork |
| Rothamsted | Subnetwork |
| Victorian Long-term Agro-ecological Sites Network | Subnetwork |
| Soil Monitoring Cooperative | Subnetwork |
| Long-term Soil Productivity (LTSP) | Subnetwork |
| Geographical Network of Field Experiments with Fertilizers | Subnetwork |
| Nutrient Network | Subnetwork |
| Harvard Forest Based LTSEs | Subnetwork |