Energetic efficiency, based on a version of EROEI indicator, of salix viminalis plantation is estimated for realistic tillage technology. For different plantation sizes, different sets of machines are selected for performing agro-technical operations. Obtained results are dependent upon plantation size, and characteristics of technical devices applied. Potential values of energetic efficiency are rather high, but it has to be taken into account that the study is confined to the limited number of operations corresponding to strictly agricultural operations. Addition of other steps in production system is supposed to decrease final values.