Slurry and solid biomass are suitable for biogas production. A cow weighing 500 kg can be used to achieve e.g. a gas yield of maximum 1.5 cubic metre per day. In energy terms, this equates around one litre heating oil. Regrowable raw materials supply between 6,000 cubic metre (meadow grass) and 12,000 cubic metre (silo maiz/fodder beet) biogas per hectare arable land annually.