Assessing the tree canopy and above-ground structures.
Link to this table.

Defoliation: a relative amount of needles or leaves are missing from the canopy as compared to a reference tree.
Is there any level of defoliation noted? ____ Yes _____ No
If defoliation is present, estimate the percent defoliation __________
Describe the location, relative area (sq. ft.) of the defoliation, percent canopy/leaf loss (% of whole area), and any other notable information regarding each defoliation area noted from visual assessment at Locations A and B. Please take photographs as necessary, noting the general direction of view.