Problems with "Model" Farms

This is a good analysis of efforts to model different and better ways of doing farming.  I'm a lot older than the author, so we both may be stuck in the past.  Underlying a lot of the analysis is a more general law which applies in education and medicine: replication will kill you.  That is, a "model" farm that actually works for a number of years, and many such ventures don't, may fail when replicated to other environments.