I have read some of the contributions to the on-line debate as I develop my response to the issues raised in the CoCoFe. Any information that contributes to such an important code must be supported by robust science and not just be opinions and ideas. While the incorporation of recycling nutrients is very important both in an environmental and economic sense, the fact remains that agriculture and food production is essentially still an open system - because production and consumption are temporally and spatially separated. Composting, worms, P reclamation all have a small role in helping develop a circular economy but the fact remains that nutrients will still be needed from mineral fertilizers to sustain production of food for humanity.
Developing these guidelines is too important to have junk science driving the practices to be recommended.
Dr. Robert Norton