There's a short chain between field and fork, and the shorter that chain is - the fresher, the more transparent that system is - the less chance there is of anything from bio-terrorism to pathogenicity to spoilage.
The mechanical food system externalizes a lot of costs like obesity or Type 2 diabetes.
We can't begin to feed ourselves with a local-centric system if we lock up land in royal manor models.
The linear, single species idea of farming is an assault on ecological function. Something's going to break down in that system - anything from soil structure, in economics... but where to start is with true ecological function.
Think of all the mesquite in Texas, the pinyon pines, the acorns in Appalachia, every place has the possibility of mass production. It's an infrastructural system so nestled in ecology, it's a more beautiful ecology.