Posted: 06/03/2017 at 09:18
Sorry, but I don't agree. A rotavator will break up all the roots creating root cuttings, each of which will grow into a new plant. This happens especially with brambles, bindweed, couch grass and ground elder. You will never be able to rake them all out and they don't rot down, they grow. I know because I had a useless firm to start my garden by flattening and laying the lawns. It had been a farmyard and a bit of a field. They didn't weedkill anything, only rotavated and raked. It meant perennial weeds in the lawns and flower beds. That was over 20 years ago and bindweed and couch grass still creep into the beds from the lawn.
When I grew potatoes in the veg garden they didn't inhibit the weeds. The earth was broken up because of the work I put in digging, planting and digging them up.