I would highly recommend hugelkulture if you have the time to get them started, I have one I started several years ago, I'm not old but my back is busted and it helps tons not havingto bend all the way down, plus I was able to teach my chickens to stay off of it so I don't have to worry about them destroying my plants anymore. I have 5 more large hugelkulture beds starting now.I have heard of raised beds.
Never heard the terms you are using.
Is it something that one could build or are they purchased ?
For corn you would need a pretty large one, since as I'm sure you know corn needs planted a minimum of 3 rows wide yo preform best
