Beekissed
Mountain Sage
Mangles are good to grow for pigs and corn is a high nitrogen feeder, so it would most definitely benefit from being planted in the pig lot, though I would ferment it before feeding it back to the pig. Often you can do both, with planting the root crop and the seed crop together in the same space, stacking nutrients.
Salatin has some good ideas on the topic, though don't get sucked into to thinking he's all that...he just has a few good ideas on soil and pasture development that really work at his place. His book You Can Farm can help you with this project as he uses pigs the way you are wanting to do.
Salatin has some good ideas on the topic, though don't get sucked into to thinking he's all that...he just has a few good ideas on soil and pasture development that really work at his place. His book You Can Farm can help you with this project as he uses pigs the way you are wanting to do.