I just finished digging out for a patio. I now have clumps of dirt and grass that were removed from the patio area that I placed around the house that I will use to regrade the land. Is there any easy way to break these clumps up? Will a tiller do it? Is there a different piece of machinery that will do it? After busting by tail to build the patio I am looking for the easiest way to break them down into a form of dirt that can be graded.