Table 3 Savings of energy and greenhouse gases by replacing mineral nitrogen
Element of cultivation | SNF | Replacement of mineral fertilizer | Savings of energy [kWh ha −1 ] | Savings of greenhouse gases [kg CO 2 eq. ha −1 ] |
|---|---|---|---|---|
Clover grass leys as catch crop (CC, autumn growth after harvest of spring wheat) | 65 | 52 | 841 | 275 |
Clover grass leys (year of main crop) | 498 | 398 | 6,436 | 2,101 |
CC after WW3 | 77 | 62 | 1,003 | 327 |
CC after peas | 36 | 29 | 469 | 153 |
CC after WW5 | 66 | 53 | 857 | 280 |
\( \overline{\mathbf{x}} \) CC | 61 | 49 | 792 | 259 |
Σ arable land (AL, 6 ha) | 730 | 584 | 9,443 | 3,084 |
\( \overline{\mathbf{x}} \) AL | 122 | 98 | 1,578 | 517 |