306 



JOURNAL OF FORKSTRY 



The results of the experiment are already extremely instructive and 

 will help in projecting a rational course of procedure for future oper- 

 ations. The height growth of the planted white-pine trees on the five 

 plots may be used as an indicator of the degree of suppression pro- 



6 191* 7 '^'^ 8 



1917 \Q 1311 11 



AGE IN YEAR5 



• M> existing sprout arowth 

 ^sSprouf (growth cut in 1915 



~° Sprout ortMfh not cut 



•*o Under middle-aaea chestnut 



duced by the different conditions of the cover growth. The accom- 

 panying chart gives the average current height growth and the average 

 total height of the trees of each plot. 



The preliminary results so far attainable from the experiment sugT- 

 gest the following provisional conclusions : 



