ADMINISTRATION 79 



stands of a quick-growing species or of a specially 

 valuable species. Next in importance are areas 

 which offer good opportunities for object lessons to 

 the public in the practice of forestry. Some areas 

 offer combinations of advantages. For instance, a 

 burned-over tract may be suitable for planting to 

 some rapid-growing species which is also valuable 

 for timber and at the same time may be situated so 

 that it will serve as an object lesson also. It is on 

 such areas in general that reforestation by planting 

 is being concentrated. 



While the reforestation of the watersheds of 

 streams important for irrigation and municipal 

 water supply has a large financial value, this value 

 is hard to estimate because it involves not actual 

 cash profit but loss prevented. But when a favor- 

 able site is planted to a quick-growing, valuable, 

 species, it is comparatively easy to arrive at a fair 

 estimate of the possible profit on money invested. 

 It has been estimated that under many conditions 

 it is highly profitable to reforest waste lands on the 

 National Forests by planting. From certain ex- 

 periments made it is estimated that a white pine 

 forest artificially established on a second-class forest 

 soil in Minnesota, will yield about 46,500 board feet 



