Originally Posted by turf doc

It depends on how energetic you are feeling, but a rotor till will make light work of turning over your soils. The plan would have to be to try and make the soils as uniform as possible across your area so take some from one side and move it to the other and vise versa. Though obviously the best way to do it would be to by in some top soil. There are also soil amendments out there that you could mix in with the soil to try and give it some structure. Once you have your ground ready then start to think about what grasses you want.