Hi. I live in S. Arkansas and have approximately 4 acres of centipede which has been purchased & repurchased from a grass farm due to dying and disease. We selected centipede because of its shade and drought tolerence. The grass is now infested with weeds, bare spots, black slime, brown patches and lines of yellowing grass that circles and spreads. The problem must be addressed or we will loose our investment completely. In researching, I think part of my problem is too much water from the sprinkler system and clay gravel soil. I have so much acreage that it is overwhelming and I don't know where to begin to start. The closest professional help is 2 hrs. away and would probably cost a fortune. Could you please give me some advice that won't be so complicated that I will give up. In our small town we are known for our beautiful yard. Thank you.