| Ecosystem | Time | SO4-S | Ntot | Reference |
Linnebjer, S | Open field | 1967 | 11.0 | 9.3 | [4] . -“- -“- |
| Quercus | 1967 | 34.4 | 22.4 | |
| Quercus | 2013 | 4 - 6 | 12.0 | |
Baldringe, S | Fagus | 2013 | 3 | 9 | [6] . |
Skovbjer, DK | Open field | 1997-2000 | 7.8 | 12.9 | [7] . -“- |
| Quercus/Fagus | 1977-2000 | 11.5 | 20.2 |