NURSERY PRACTICE. 121 



6. Prevent the formation of long side branches by 

 shortening those that are liable to become too long. This 

 is especially desirable with the Soft Maple, which has 

 a tendency to form long branches that are likely to break 

 off unless occasionally pruned. 



7. Where trees have lost their leaders, prune so as to 

 develop one of the side branches into a leading shoot. 



FIG. 35. Sections of trunk of tree showing wounds properly 

 healed over. (After Hartig.) 



This the tree always attempts to do itself, but a little 

 judicious pruning will greatly aid it. 



S. Every species of tree and shrub has its own nat- 

 ural form, and in pruning do not try to make all of them 



