Figure 6
From: Forbs enhance productivity of unfertilised grass-clover leys and support low-carbon bioenergy
Greenhouse gas (GHG) emissions per energy unit in the 10 seed mixtures without (a) and with fertilisation (b), and plotted against harvestable biomass yields (c). The dashed horizontal line denotes 60% reduction in GHG emissions compared to fossil fuel. Different hatched bars denote various sources of GHG emissions (a,b). Significant linear regressions and coefficients of determination were shown (c). For detailed calculations of GHG emissions, please see Supplementary Text and Table S2.
