| Sediment | Sampling Date | Treatment | Nitrate applications mg NO3-N L-1) | Aims of the test |
| Station 1 Sed.1 | 3/2/87 | Water | 5-100 | Effect on P release; seasonal difference in comparison with sediment Sed.2 |
| Station 1 Sed.1 | Water | 50-100 | Long-term effect (155 days incubation | |
| Station 1 Sed.2 | 4/5/87 | Water | 5-10 | Effect on P release; site differences |
| Station 27 Sed.2 | Water | 5-100 | ||
| Station 28 Sed.2 | Water | 5-50 | ||
| Station 1 Sed.2 | Water | 20 | Effect of resuspension on nitrate | |
| Station 1 Sed.3 | 9/11/87 | Water | 10 | Effect of treatment method (sediment or water) |
| Water | 25 | |||
| Water | 35 | |||
| Sediment | 10 | |||
| 25 | ||||
| 35 |