If you're interested in a deep dive into adapting to
local conditions and your own preferences, we've made the
Landrace Gardening online course free. Mostly taught by
Joseph Lofthouse, with some guest speakers. Including a chapter on increasing nutrient density.
If you've read
Landrace Gardening, this is a good companion course with somewhat different content, and lots of videos of Joseph in his garden.
https://goingtoseed.org/products/1406309
There is also a course taught by Dr James White on how to use microbes to adapt to local conditions. Great for seed savers.