STREET TREES. 9 



How to keep trees healthy. Any tree will resist insects and dis- 

 ease, and will recover from injury much more readily if it is vig- 

 orous and healthy than if it is weak. Observe the following rules : 

 Never let a sidewalk be laid closely about a tree ; a surface of bare 

 earth (footing) at least 2 by 3 feet, preferably 4 by 8 feet, should 

 be kept (figs. 2, 3, 5) ; when a tree is fully established this may be 

 grassed over, tho it is advisable to keep it open. Once a year work 

 a little fertilizer into this open space and water it at intervals as di- 

 rected at page 13. 



Fig. 4. A Young Street Tree. Fail- 

 ing Thru Lack of Care — Of Poor 

 Form, with Branches too Low, It 

 is Crowded in a Brick Pavement, 

 Has no Stake and Only a Short, 

 Frail Guard. 



Fig. 5. A Young Street Tree of 

 Good Form, Properly Planted and 



Well Cared For Guard, Stake, 



Footing as They Should Be. 



If a young tree is exposed to winds or other strain, keep it firm 

 and upright by means of a stout stake to which the v stem is secured 

 in such fashion that it will not be rubbed (fig. 5). Unless the tree 

 is so placed that it cannot be gnawed by horses maintain a stout 



