SHADE TREES AND SHRUBS 



715 



tree or a bush. In fact, his services 

 have become so popular that a number 

 of men have sprung up who presume to 

 be expert arboriculturists and who 

 really have no title to that trust. These 

 men, unwittingly or otherwise, often do 

 work of absolutely no importance to 

 the vigor of the tree and neglect the 

 fundamentals. 



One aim of this new department will 

 be to help these men in the business in 

 which they are expected to be expert and 

 to enlighten the employers of such men 

 as to what is salient and what is not. 

 Aside from these men, however, we 

 have in this country many commercial 

 firms and individuals who thoroughly 

 understand their business and who can 

 be absolutely relied upon. We have 

 many city foresters, arboriculturists, 

 tree wardens and superintendents of 

 trees who are eminent in their profes- 

 sion. With these we expect to cooper- 

 ate and by interchange of opinions 

 mutually help each other. It was 

 chiefly due to the honest work of these 

 professional men that the interest in 

 arboriculture has assumed such vast 

 proportions. The cooperation of the 

 landscape architects, foresters, superin- 

 tendents of parks and private estates 

 and gardeners was almost equally im- 

 portant because they all recognize that 

 it is to their interest as well as to the 

 interest of the owners to have some one 

 work with them who by training and 

 experience is able to give special 

 attention to the numerous details of 

 tree culture. Outside factors also helped 

 to bring this about. Some of these are 

 the rapid growth of cities and the 

 consequent desire on the part of their 

 inhabitants to maintain country homes ; 

 the enhanced interest in social welfare 

 and park development and the increased 

 number of insect and fungous pests. 



The arborist's sphere is primarily to 

 care for and to plant trees and shrubs in 

 parks, woodlands and on streets. But 

 the word care is a big word and includes 

 a great many related subjects, each of 

 which is almost a study in itself. It 

 includes a knowledge of the habits of 

 the injurious insect and fungous pests 

 and methods of combating them; it 

 includes methods of fertilizing, repair 

 protection from unfavorable extraneous 



agencies, such as gas and sewerage leaks, 

 compact soils, overhead wires, root 

 injury, etc. The word planting also 

 takes in a bigger field than the mere 

 planting of trees. The arborist very 



Damaged by Horses 



result of neglect in properly caring for a tree 

 which has been injured by horses biting it 



often has to plant shrubs, vines and 

 wild flowers. He has to know whether 

 certain plants will do well in certain 

 locations and he has to know just how 



