I mentioned the Bio Logic to a friend of mine that deals with Ag. stuff everyday and he said that I could get 3 acres of corn and an acre of Round up Ready seed from a deal for about $100. That sure beats Bio logic by a bunch. I am going to hit him up in about a month. Call your local ag center, every county/parish should have one and they can tell you the avg ph level for your area. In my area I will need to do 2 1/2 tons of lyme to the acre to get the ph right. Broad casting should be fine.