Using broken concrete for fill
My son has bought a house that had a concrete pad for a garage. He wants to get rid of the concrete. He also has to fill a corner of his yard to level it out. I suggested he use the broken concrete from the concrete pad as fill. He can dig out some of the dirt(with a machine) and use the broken concrete as fill and then put the dirt over top.
Is this a good solution? How much dirt should go over the concrete filler?