Dr Martin Bidartondo did a really good job of explaining the results of his team of European scientists research. It’s complex and very important to understand for tree health. What they found that the variable really affecting tree health was excess nitrogens that reduce the health of the mycelial networks on which trees depend.
To find out more about this work go to Dr Bidartondo’s speaker page and also check out his contributions on the panel in the 2018 Tree Conference.