I’m due to revisit the redox course, but I’ve found that the ‘map’ Olivier provides is an actionable diagnostic tool. In my case I caused a downy mildew problem in spinach by increasing pH early in the spring, I consulted the map to find that downy mildew is an organism that occupies the high ph low eh part of the map, and that guided my decision to make an application that included a fermented material in hopes to add electrons.