Type of cover | Description | Farm | Experiment | Monitoring period |
Peat | Thickness of 5 - 15 cm of acidic/hydrophilic Baltic peat 1 covered storage pit + 1 uncovered storage pit (control) | F1 | E1 | Summer 2004 |
Polystyrene ball | 6000 balls (Æ: 20 cm ) of SPE polystyrene 1 covered store + 1 uncovered store (as control) | F1 | E2 | Autumn 2005 Summer 2006 |
Synthetic sheet roof | 1 storage pit covered with a synthetic sheet roof | F2 | E3 | Winter 2006 Autumn 2006 |