102 



ELEMENTARY FORESTRY. 



from drying out, and this is especially beneficial if the trees are 

 artificially watered. 



Watering should be done thoroughly or not at all. One 

 good watering should keep the ground moist for two or three 

 weeks, in the driest weather we have, if the land is heavily 

 mulched when the water is applied. For a good watering in a 

 dry time about one barrel of water should be given to each street 

 or lawn tree. A hollow should be made around the tree and 

 covered with mulch before the water is applied. This same 

 amount of water might be applied at the rate of one or two pail- 

 fuls a day, and not be of the least benefit to the tree, if applied to 

 the bare surface of the ground. 



Figure 18. Soft Maple Figure 19. Soft Maple Figure 20. Soft Maple 

 not primed since it was once pruned showing several times pruned 

 close head that is not 

 liable to break dn w n. A 

 good form. 



planted out. Triable to 

 break in its crotches at 

 any time. A bad form. 



preserving a main cen- 

 tral axis. A good form. 



The Pruning of Street Trees at the time they are set 

 out is an important matter. If the trees are very tall and slen- 

 der, it is a good plan to cut them off at about ten feet from the 

 ground, and trim off all side branches, as shown in figure 21. 

 For trees that have been pulled from the woods this is generally 

 the best treatment, while for nursery-grown trees that have had 

 plenty of room to develop a good top it may sometimes be best 

 to trim so as to leave part of the top. If the trees are trimmed 

 to bare poles before planting, some little pruning will be 



