We have been clearing the brush from a section of our burr oak woods, with the nastiest invaders being buckthorn and garlic mustard. We have cut and poisoned the largest buckthorn and burned annually in the spring. That has really helped by either killing or slowing the re-invasion. However, many of the tenacious small saplings re-sprout in small clumps. And, we are running out of forest floor fuel to burn annually effectively.
We are thinking about running a brush-hog mower once or twice a year (especially early spring before the native herbs come up), thinking that although re-sprouting will occur, eventually the brush will just run out of energy. Does this make sense?