It is virtually impossible to write a brief summary of fertilisation requirements and nutrient deficiency with regards trees. The subject could amount to a 300 page book with regards one species and still be non exhaustive. It is however one of those issues which any arborist or silvicultural surveyor needs to understand at a glance and as with so many aspects of tree care this combines experience with a knowledge of the location. As such based on my experience and the locations I have…