Initiated on five 10 acre areas, three o£ which had white spruce seed trees re- 

 served £rom cutting along the borders of the rectangular areas. Cutting and 

 mechanical tree length yarding which took place in July, 1960 supplied the ground 

 disturbance. 



On a similar cutting system study established in 1956, an interim 

 examination was made on the growth and survival aspects of the resulting regenera- 

 tion. 



Trembling Aspen . Additional sampling was carried out on a project 

 initiated in 1959 aimed at devising a visual classification system for determining 

 the quality and the future potential of the large amounts of trembling aspen 

 regeneration which occurs following mechanical logging. 



Artificial Regeneration Studies . 



Jack Pine . Final field examinations were made on the aerial seeding 

 project and the controlled burning, mechanical scarification and brush scattering 

 project established in 1957. Office compilations and the report are not complete* 



Chemical Treatment of Underbrush . 



A final examination was made on the detailed herbicide study initiated 

 in 1957. The study involved two chemicals, twelve concentrations, and four 

 application tiroes on a variety of common underbrush species. A detailed analysis 

 of the results is underway and it is anticipated that at least another year will 

 be required before the analysis and the report can be completed. 



Northern Region 

 The forest research in the black spruce association of north-eastern 

 Ontario was continued and expanded during 1960-61. A detailed study of the 

 rooting habits and layering of black spruce was completed, and in view of the 

 importance of the findings, a final report was submitted to a Journal for publica- 

 tion. 



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