I'm trying to reclaim what has become a very ugly lawn. I've removed a blackberry jungle, planted a few nice bushes and am re-seeding that plot, but salvaging the established "lawn" is giving me a headache. Specifically this obnoxious grass that I can't get rid of. It's broad-bladed, grows in clumps, and strangles out the desirable grasses. The first two have been mowed recently. The third is about a three-week growth. I'm located in northern Oregon, in a semi-arid climate. Any ideas?