The elemental ratios of carbon, oxygen and hydrogen are key feedstock parameters in
commercial use and the quality of fuel products (Friedl et al., 2005). The feedstocks which
are favoured for bio-oil and fuel-gas are those that have low mineral and N content. These
include wood and biomass from energy crops, including short-rotation woody plants (such as
willow), high productivity grasses (such as Miscanthus spp.), and a range of other
herbaceous plants. They may also include abundant, available and low-cost agricultural byproducts,
including cereal straw.