PH of my lawn soil is only 3 notches from being pure alkaline?

I have been asking about my lawn in mid mich, checked the ph and it is highly alkaline. Some sites are saying to add sulphur or iron sulfate. My soil seems relatively compact, but not horrible. I donot want to tear up the yard AGAIN! Please,I just tilled and seeded it last spring (2007). Any suggestions on what to do without digging up the entire lawn?