I got an idea: The article written by Clint Bower about mulching in Haiti said that if you mulch a field you will attract crickets, especially with bean crops. Well, beans, crickets and other insects are very good feed for chickens. I wonder if some some area with bad quality soil could be rejuvenated by growing low cost beans and other vegetables and mulch plants, solely for feeding chickens?
May be that could be done for a few seasons, then the soil would be in better shape to grow crops for human consumption.
Link to Clint Bower article: Six Mulching Principles | ECHOcommunity.org