Big Mac...
Below is a picture that Hardings sent me a few years ago showing how they prep a site for planting...
Obviously a lot of clean up work went into that, and then a tractor was used to disk it up (looks like to me anyway). Also looks like (based on white powder seen around base of trees) that he put down something like lime, bonemeal or fertilizers of some kind (probably again with tractor broadcast).
The obvious catch to being able to do that is your hillside would have to be workable by a tractor (not too steep).
TNHunter