I recently was given permission to cut at a woodlot less than a mile from home. A decent mix of white oak, black cherry, elm and a bit of ash. Unfortunately I must clear a bunch of buckthorn to access the decent stuff. Some of the buckthorn has reached 6" diameter and it seems like it might be worth while to process and burn the larger diameter pieces as firewood. Anyone else burn it and can comment on its qualities as firewood?