NURSERY PRACTICE. 



127 



for a number of years to develop good tops, while if 

 they^Tiad well^formed tops in the nursery and were 

 shortened back at planting time much less attention will 

 be necessary, but the experience of large planters seems 

 to show best results from close pruning. 



In a row of Elms or other trees there will often be 

 found peculiar individual shapes. Some of the trees 

 will take on desirable forms, while others will be spread- 

 ing and awkward, and perhaps have a tendency to crack 



Fig. 41. — Elm-tree that has been planted five years and was pruned 

 to a bare pole when set out. 



in the. crotches. In some cases a little extra pruning 

 will bring siich unfortunates into shape, buf often "f hey 

 are incorrigible, and are best replaced by other trees with 

 better forms. 



Protection should always be given street trees as soon 

 as they are set out, and this should consist of something 

 that wiU protect them from sun-scald, gnawing of horses, 



