''2 Canadian Forestry Journal. 



Thirty to thirty-five feet is close enough to plant large trees like 

 ^d tx e^^' "^''^^^"' '"'^"^'- '^°^-' clLtn.ts,Ltonwo 

 advisable to plant quick-growing trees, such as the cottonwood 

 or box elder between the elms or maples, in order to fill urthe 

 spaces whi.e these trees are .young, and to secure the benefit of the 

 shade as soon as possible. These trees should, however be re- 

 moved before they interfere with the permanent trees. ' 



On payed streets the trees suffer greatly from lack, of air and 

 base'';f'".f ''/' a^lvisable to leave at least three feet all around the 



roots. Another thing to bear in mind when planting is 'to place the 

 trees out of reach of horses standing at the curb. 1 great manv of 

 our trees are injured by horses biting off the bark or rubbin^. 

 against the tree. It is better not only on this account, but oS 

 account of the larger feeding surface the roots are able to reach if 

 the trees are set between the sidewalk and the private ground, 

 rather than outside the sidewalk. Until the trees are 8 to lo 

 inches m diameter, they should be protected by wire tree guards. 



Pruning. 

 Pruning is a necessary evil in the care of street trees 

 On the street trees are in an unnatural environment, and with 

 he abundance of I.ght and air tend to develop too much crown t'o 

 he usually scant plant food supply. The liabilitv of these more or 

 less .seated trees to injury from snow and ice pressure and from 

 wmd also makes .t advisable to so guide the growth of the crown 

 ftattherew.il be as little danger from these 'sources as po^^bl 

 W.th h,s m v.ew ,t .s wise to preserve well defined central axes in 

 trees l.ke the b.rch mapie and ash, which naturally possess such and 

 m the elms wh.ch nor.nally assume a vase form, large hor,zo,'taI 

 branches should be prevented from developing' and the c™ ' 

 should be supported by three or four main branches gro'™ a 

 nearly vertical as possible. 



Start Pruning Early. 

 Pruning should be co.mnenced when the tree is young and the 

 branches small, so that the necessary amputations will be sm^n! 



