This paper made a comparison between tree health and tree hazard,and pointed out that evaluation of the former focused on tree’s crown,branches and leaves performance,while inspection of the latter emphasized particularly on branches,trunks and possible target.

This study showed that all-optical spray technology applied to the transplanting of crown trees in summer, the trees leaves would significantly reduce the loss, and maintained the original crown shape of trees, which would improve the survival rate of trees, thus the overall landscape effect.

The Study on China s Foreign Dependence for Forest Products Based on Timber Safety;