-71- 



The Amount of Water to be given to each tree varies according to many factors. 

 Trees after planting need more than established tress; trees with shallow roots 

 need more than deeply rooted trees; trees in very porous soil need more moisture 

 than normal soils and certain species need more than others. A case in illus- 

 tration of the last point will be found among the acacias. Acacia raelanoxylon 

 will use all the water obtainable while A. decurrens dealbatg^ will suffer with 

 the same amount or "thrive with lese. Every one would realoize that a Magnolia, 

 a Liriodendron or a Redwood would want more moisture than a Eucalypt or a Desert 

 Palm. 



So far very little has been done in the way of fertilizing and cultivating 

 the street trees. So far as was noted but one case of artificial fertilization 

 was seen. This case was a planting of Acacias on a poor soil which wae very rocky. 

 Tlie fertilizer used was barnyard manure mixed with the soil from the four-foot 

 hole. Certainly these trees gave no evidence of poverty of soil. Similar 

 instances have been found for individual trees which do not mature rapidly. 

 Chemical fertilizers, chiefly mixtures of acid phosphate and muriate of potash, 

 have been tried in the East with good results but no records are at hand for their 

 use here. Occasionally street sweepings are saved and incorporated with the soil, 

 but their action is often as much physical ne it is chemical. 



As to cultivating - it is the general practice to keep the soil free from 

 weeds and grass about the base of the treee. In most cases, an effort is made, 

 with varying success, to kaep the soil stirred about the base of the trunk. This 

 insures a dry mulch end hence a preservation of water and an aeration of the soil 

 which is greatly to the adventage of the tree. 



As h&s been stated before in the consideration of the nursery stock, the 

 trtdninp and pruning of the tree must begin in its earliest infancy. Since our 

 street is laid out on formal geometrical lines end its purposes are so strongly 

 utilitarian, some concession must be made to service in the training of a tree. 

 The chief work in the nursery is to insure one single straight leader. There may 

 be strong lateral branches but there must be one still more vigorous central leeder. 



