Posted: 27/08/2013 at 22:16
Smokin I have never double dug in my life. It destroys the soil structure.
I usually just roughly dig clay soil over and leave it to the weather.A rotovator will be easier than hand digging but same affect...ok probably better than hand digging...but just use over ground the once. The less you mess with the soil the better. Then leave nature to do the rest. The ice gets in and breaks it up but doesn't chop all the worms up. They will then come up through soil to get to manure thereby aerating and dragging it back down.