Mr. Con Traas:

Agroforestry might be a possibility in certain areas. The original idea is to have your planation of forest or trees in a gap and then another line of forest or trees in the space between the trees where you run your conventional agriculture and the rest of the crop agriculture. I have had inquiries from people asking if they can plant their apple trees as the hedge or forestry in between the crops or livestock. That raises some practical problems because policy and quality assurance schemes, etc., do not want livestock in the same place as a food crop. That would be a concern. It was a possibility 50 or 100 years ago but not now. What is required is a re-examination of some of the schemes and how to ensure there is food safety and so on. Similarly, where there is a tillage crop and another food crop beside it, if you spray the tillage crop with fungicide or insecticide or whatever, that may have a drift effect onto your alternative crop. There are practical issues to be ironed out both around the actual farming of it and the regulation of it.