I've been reading Edible Forest Gardens and they have a section on plant spacing with particular emphasis on root spacing. Since reading that book, I look forward to reading yours since I understand how important it is to get to the root of the problem (pun intended ). First, one thing in their book was the drought of information on roots for a majority of plants. Is this situation being corrected? We need to have more knowledge on their structures and how they interact with other plants.
Second, is there a way to get info on a plant's roots without digging it up? Maybe I've been reading too much science fiction. I thought it would be nice to have that ability without having to kill a plant.
Doug, there are some very high-tech ways to tell how deep roots are. But the it is very expensive and doesn't map the small & tiny roots like Weaver's trench mapping that I have in my book. I don't know if he killed the plant because only one half of the roots are killed.