Back in 2009 I had a 2 acre field reclaimed, so didn't think raised beds were really necessary. I've been gradually headed in that direction though. Last year I ran a couple of yards of soil/composted pig manure through my soil sterilizer and put in a 6x16 foot raised bed, and have a few smaller beds planned. Things like beans, corn, and potatoes will still go into the ground; but other things will go in the beds. When weeds get too crazy I'll take the soil out and bring it up to 180 degrees again, I'm tired of trying to keep weeds out of my carrots and onions.