grain 0.9 kg ~ 15.3 MJ
straw 0.65 kg ~ 9.7 MJ
----
Total biomass 25.0 MJ
Biomass efficiency ~ 0.7% from solar input
ethanol product 7.4 MJ
processing etc -6.7 MJ
----
net 0.7 MJ
Ethanol efficiency 2.8% from biomass
