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Table 3 Savings of energy and greenhouse gases by replacing mineral nitrogen

From: The use of legumes as a biogas substrate - potentials for saving energy and reducing greenhouse gas emissions through symbiotic nitrogen fixation

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
  1. Acronyms: WW3 = winter wheat in third place of crop rotation, WW5 = winter wheat in fifth place of crop rotation.