| NH3 (g[N] m−2∙d−1) | N2O (g[N] m−3∙d−1) | CH4 (g[C] m−3∙d−1) | CO2 (g[C] m−3∙d−1) | |||
| Peat cover | Control | Summer | 4.1 (3.9) | ND | 56.9 (9.9) | 44.5 (6.9) |
| Covered | 3.1 (3.1) | 75.8 (62.4) | 58.5 (48.6) | |||
| Polystyrene balls | Control | Autumn | 0.6 (0.9) | ND | 67.8 (32.4) | 34.9 (18.7) |
| Summer | 3.5 (1.1) | 90.2 (30.7) | 239 (106.5) | |||
| Covered | Autumn | 0.5 (82.1) | ND | 65.8 (50.3) | 34.3 (26.7) | |
| Summer | 0.8 (0.4) | 139.3 (51.3) | 116.6 (35.6) | |||
| Synthetic sheet | Covered | Winter | 0.013 (2.7) | ND | 0.3 (0.1) | 0.2 (0.1) |
| Summer | 0.006 (3.0) | 1.7 (0.3) | 4.7 (1.0) |