The effect of digestate and mineral fertilisation of cocksfoot grass on greenhouse gas emissions in a cocksfoot-based biogas production system

Table 3 Components of energy inputs in calculation of GHG emissions for cocksfoot grass production and processing into biogas in seven annual growing cycles

Only in year 1 of grass growth		For all 1–7 years of grass growth
Direct energy input with subsequent direct GHG emissions	Indirect energy input with subsequent indirect GHG emissions	Direct energy input with subsequent direct GHG emissions	Indirect energy input with subsequent indirect GHG emissions
Soil tillage	Agricultural machinery	Cutting	Agricultural machinery
Soil cultivation	Fertilisers	Raking	Fertilisers
Sowing	Seeds	Chopping and collection	Human work
Fertilisation	Human work	Transportation
Cutting		Ensiling
		Anaerobic digestion
		Spreading of digestate

ISSN: 2192-0567