I had no idea there is a name for a raised garden bed like that! Several years ago, we gradually built a long, curved berm from brush and topped it off with a truck load of compost from a local dairy. A pond is tucked into the slope on the north side. Hmm, perhaps I will keep some of the brush for another raised bed instead of mulching all of it.
RE: Bare Roots: An Honest Journey Into Permaculture