I have been having lots of fun reading this latest book from Eric Toensmeier on the Carbon Farming Solution. It was a surprise to me to see just how far we can go with perrenial agriculture. I also discovered that Eric believes in the carbon metric of tonnes/hectare/year, which becomes a useful way to compare the various carbon sequestration rates and impacts of strategies.
The book is exhaustive in all of the resources and combinations of land which can adopt perrenial crops. I wish it were more specific to what we can and cannot do here, as a prescription perhaps. That will have to fall to all of the permaculture designers here, whom I hope are inspired by this great tool.