Product

MJ∙kg⁻¹∙DM

Process

MJ energy/MJ agricultural product

Energy use

Conversion efficiency

Potato tubers

17.0

Bioethanol production Anaerobic digestion^a

0.22 0.019

0.61 0.065^b

0.094^c 0.58

Sugar beet roots

17.0

Bioethanol production Anaerobic digestion^a

0.21

0.016

0.056^b 0.08^c

0.55 0.135^b

Oilseed rape seeds

27.6

Biodiesel production Co-combustion^a

0.16 0.025

0.168^c

0.25^b

Silage maize

17.0

Anaerobic digestion

0.073

0.36^c