RESTOCKING FOREST LAND. 69 



being seeded later or owing- to the later advent of conditions 

 favorable to their germination and growth. It may happen 

 in the case of burnt-over pine land that pine seed is distrib- 

 uted over it the first year after it is burned, but owing to 

 there being no protection from the sun the young seedlings of 

 White and Norway Pine which are very delicate are destroyed. 

 After a young growth of poplars has appeared the pine seed 

 may find just the right conditions for growth for a few years 

 and finally get ahead of the poplars and crowd them out 

 while in the meantime it is being much improved by the pres- 

 ence of the poplars which grow rapidly and force the pines to 

 make a tall growth. On the other hand, however, the poplars, 

 birches and other trees and shrubs and even weeds may some- 

 times make so strong a growth as to kill out the young pine 

 seedlings if they are not sufficiently well established at the 

 time the mature growth is cut. 



