Set up a MFR harvester and planter to use a sapling of your choice, pipe the excess saplings to an identical farm that is set to shear the leaves, pipe those sheared leaves to a cyclic assembler to be crafted into plant balls, pipe those to a compressor to be made into compressed plant balls and then pipe them into a fermenter to be mulched down into biomass, that is what I am doing in my world and if you so desire you can setup multiple farms and pump the resultant ethanol into some monsterously inefficient 36HP boilers.