Thanks for the feedback. I do have comfrey and some n-fixers mixed throughout the orchard. I got the idea of adding compost (in the fall once the greenery has turned brown and leaves have fallen) from Michael Phillips' book, The Holistic Orchard. The thought is this will help cut back on the propagation of harmful bacteria and fungi that my try to take hold on the apple leaves.
And Michael, your response does seem "spot on".