TREES AND ACREAGE PLANTED BY OWNERSHIP, 1968-9 



Ownership 



1. Crown 



(a) Unalienated . . 



(b) Licensed 



2. Agreement Forests 



Total 



42,401,098 19,190,200 61,591,298 



61,762 



18,546 



80,308 



retention of strips of green timber or single trees to provide 

 the seed. 



Artificial regeneration involves site preparation of large 

 areas for planting and seedling; planting nursery stock by 

 machine or by hand; production and planting of tubed 

 seedlings; and seeding, both ground and aerial. 



Tending includes treatments such as cleaning, herbicide 

 spraying for release, thinning, improvement cutting, and 

 pruning during the life of the forest. 



TREES PLANTED BY SPECIES, 1968-9 



Measuring growth of red oak tree following thinning opera- 

 tion, Lake Huron Forest District. 



SILVICULTURAL DEVELOPMENT 



This activity concerns development and evaluation of new 

 equipment and techniques that may be used to improve 

 silvicultural operations. It involves field testing of equip- 

 ment and techniques, which for the most part have per- 

 formed satisfactorily under research conditions. Further 

 studies on an operational scale are an essential step to 

 determine costs and performance under field conditions. 



Current work includes development and initiation of 

 aerial forest fertilization and field tests of new chemical 

 herbicides and silvicides; developing procedures to evaluate 

 work done in the field; and investigating new equipment 



107 



