Wow, a lot of info and questions. the Terra Petra sound promising. I will have to look into the biochar.
I don't think that I supplement too much extra water. I try to water only when I have to, and since I have to use chlorinated water I try to use as infrequently as possible. There is a lot of humidity in this climate, can't change that but can increase space between plants.
I have not had a soil test in years, but I think the pH and nutrients are good. I put a lot of leaves on the soil for mulch, pine needles go mainly on pathways and mulch for blueberrys. Leaves breakdown (rot) quickly in my climate. I have been told that the leaves will breakdown and buffer the soil pH to the proper range, that how nature works and I believe it. Crops and weeds all seem to have enough vigor. My problems seem to be in older plants. The one thing I am wondering about is when I burn, how much will the wood ash affect the soil pH? I know it will be impossible to tell until after the burning, so I may do a test then. If it does raise the pH the options I have seen to lower pH are sulfur or acids. Neither solution I like so will probably just use mulch/time. I use some wood ash now, but only a couple of pounds a row per year. And sometimes after planting seeds ash on the surface deters slugs and cutworms, they don't like it
I see the burning of the soil as the "Great Reset" then to let nature rebalance the system, ( i don't want to try and control it)
I am trying to compost some now, but my goal has been to never have bare soil, except when germinating seeds. This has required lots of leaves. Usually I use 8 garbage sack per row 3 times a year, plus around dripline of citrus tree, under camellias, azaleas, and other ornamentals. I can use up to 500 bags a year, but heck they are free, and I never buy trash bags.
I am not familiar with clubroot, I will look into that.
Food forest, I really don't have a clue on what advantages I could work there. I do grow elephant in my blackberry row, since the bramble are deciduous and the garlic sprouts in October it works out well. The blueberrys should do okay under the pines and I might try that. I don't know what to plant under the oaks except ornamentals. I have enough of them.
Thank you for your imputes.