my plots are plowed with a 2 bottom plow and then disced 2 or 3 times throughout the year which makes for no hard ground and no debris...i don't have a cultipacker so the best way to get a firm seed bed is by using a drag not a disc which loosens the seed bed especially with small seeds like turnips which shouldn't be dragged in or covered at all...works great for me and hope it helps others on this site.