I've lived in my wooded property for over 40 years. Over the past 5 years or so, a tall grass of some sort (12-15" high) has been increasing along the front of the woods and has overtaken the wild flowers that used to grow there. It dies at the end of summer and then looks like straw and lays down, so weedwacking isn't possible. The ground beneath it is irregular, so mowing isn't an option. I tried to do some removal by hand, but the roots are tough and deep. New growth is starting to peek through it now. What do I need to do to clean it up so it doesn't grow back? It covers at least 1500 square feet. I don't care about a cultured look. I just want to get rid of that ratty-looking dead stuff permanently to tidy things up. Bringing in some kind of clean fill or even mulch as the last step would probably be fine, but something needs to be done first. Grass grows in front of it approximately 20' wide and parallel to the road. Any suggestions?