TREES AXD FORESTRY <»7 



them more compact, and the resulting young trees are more vigorous than 

 those left undisturbed. The long tap roots of oaks and walnuts and of 

 catalpa should be cut off at the first transplanting. Older plants in the 

 nursery should have root pruning some time before the last transplanting, that 

 is, a sharp spade should be thrust into the soil around and under the trees. 



PLANTING GUIDE 



Compiled from the reports of the United States Forest Service 



REFER to the Jesup Collection of woods for facts concerning the 

 character of the wood and the economic value of each species with 

 its associate trees; also for maps showing natural range. It was 

 the original aim of Mr. Jesup that architects, cabinet makers and others 

 interested in wood, as well as those interested in growing trees as a com- 

 mercial venture, might have a ready place of reference for getting acquainted 

 with not only the well-known species of American trees but also the mam 

 others little known and appreciated in the lumber market. 



A forester can tell the rate of growth of various trees and therefore can 

 estimate the time that it will take a given species to reach merchantable size 

 and the average product that it will yield per acre. He can foretell, as a 

 result, whether a particular woodland will or will not give satisfactory returns 

 under the existing conditions of taxation and with the possibilities of fire. 

 The United States Forest Service advises free of charge any applicant with a 

 problem for economic tree planting. Foresters study the conditions of the 

 locality and give particulars concerning species to be planted, how to obtain 

 the young trees and how to plant them and care for them. If the applica- 

 tion comes from some region not previously studied by the Forest Service, it 

 may send agents to examine the locality and prepare planting plans. In 

 certain cases, this direct examination may be made free of cost even for large 

 commercial undertakings, provided the work is of considerable experimen- 

 tal and educational value. (See Circular 22, United States Forest Service.) 



The Australian eucalyptus is proving a valuable discovery for America. 

 Forestry experts are studying the problem of its successful culture both in 

 the Southwest and in Florida. Eucalyptus has unusual rapidity of devel- 

 opment coupled with an all-round usefulness of wood, and under the right 

 climatic conditions is likely to give commercial crops in a much shorter 

 period than our native trees. More than 23,000 acres in California have 

 been turned over to eucalyptus growing during 1909 and 1910. 



Many of the trees in the following list are those about which the United 

 States Forest Service has gained definite planting data through actual expe- 

 rience and which have been proved to give best results under artificial 

 conditions. 



