ILLINOIS TREES: SELECTION, PLANTING, AND CARE 



37 



Lightning Protection 



In recent years protection of trees from lightning strokes 

 has received much attention and there has been an increasing 

 demand for protecting trees of historical value or other signifi- 

 cance. For such protection it is advisable to obtain the services 

 of arborists or others who are well trained and qualified to make 

 the proper installations. 



Fig. 38. — Porous drainage tile arranged as a rim and spokes of a wheel, 

 then covered with gravel, will allow for aeration of roots where soil fills 

 are made. 



WELL (OPEN) 



.\l.\UtU/( 



FILL 



STRAW 



GRAVEL 



ROCK 



Fig. .39. — Completed fill in vertical section including ventilating tiles, 

 open well around tree trunk, and soil fill over gravel and straw. 



