Districts of Tweed and Lindsay. To emphasize the importance o£ this program, the 

 co-ordination of all experimental burns was assigned to the regional research 

 office at Tweed. 

 Yellow Birch Regeneration . 



A fourth annual regeneration survey of an area experimentally treated 

 to favour yellow birch was conducted this year. This survey confirmed the find- 

 ings of the previous surveys as to the beneficial effects of the experimental 

 treatments. These were: 



Scarification improved the germination and survival of the 



yellow birch seedlings. 



The heavier than normal operating cutting ( a group 



selection method) improved the light conditions, thereby 



increasing height growth. 

 White Spruce . 



In the Tweed District a silvicultural program to improve both forest 

 and wildlife conditions was continued throughout 1960. Additional seed patches 

 were created to take advantage of the good 1960 spruce seed crop. The object was 

 to compare artificial and natural regeneration in spruce and cedar swamps where 

 three degrees of cutting had been done the previous year. 

 White Pine . 



A white pine stand was treated to three degrees of release from an 

 overstory of poplar. This work was designed to study the beneficial effects of 

 such a treatment for the control of white pine weevil. In 1960 the pine were 

 examined for the third year but no significant results were apparent. 

 Blueberries . 



A tally of blueberry plants in a sphagnum swamp indicated that mechan- 

 ical pruning and controlled burning significantly increased blueberry production. 

 Burning appeared to be the more effective. 



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