Asked this question a couple weeks ago but I'm still puzzled. I've had a couple local lco's look and they don't know either.. Anyway here's the problem... I have one lawn that is mostly centipede that about three days after I mow the wheel tracks turn a reddish color. The blades of grass will stay this color for about a week. This is the only lawn in the neighborhood that I didn't fertilize this year and this is the only one doing this. The only thing I can think of is deficiency of iron or sulfur. Any advice would be great.