1 64 PRACTICAL TREE REPAIR 



down a foot or so just in front of the opening 

 of the cavity. The soil should be dug away from 

 the roots wherever there is any decay or possibil- 



Views and sections illustrating the excavation and filling of a 

 simple basal cavity 



ity of decay, and the grounding and drainage of 

 the filling should be carefully provided for. If 

 the decay has worked down to the ground under 

 the trunk, as it often does in trees which have not 

 large tap-roots, the humus and soil must be dug 



