SILVICULTURE AND SITE 



In the fiscal year 1955-56, the Southern Research Station team of 

 specialists in silviculture and site research were engaged mainly in projects 

 already established and described in previous reports. 



The silvicultural program suffered losses through the resignation of 

 two of its members. One left at the beginning of the field season, and the other 

 remained until September. For the remainder of the year, one man carried on 

 in both his own field of mensuration and that of forest regeneration. 



Three members of the section continued to carry on the extensive pro- 

 gram of site investigations. 



A photogrammetrist and his assistant were responsible for the pre- 

 paration of maps and charts for reports, and provided other services in addition 

 to their main functions in photogrammetry and draughting. 



Research in the Petawawa Management Unit 

 Only the annual maintenance operations were carried out this year. 

 These included (a) the measurement of local climate and the tally of seedling and 

 subordinate vegetation in the ecological experiments, and (b) the estimate of damage 

 in the following experiments:- (i) release of pine from overtopping hardwoods, 

 (ii) thinnings in white and red pine, and (iii) regeneration cuttings in pure white 

 and red pine stands. 



Site Research in the Yellow Birch-Hard Maple-White Pine Region 



The field work in this region consisted mainly of the extension of the 

 landtype mapping program and the assessment of site productivity. 



One forester, working in the Haliburton- Algonquin Upland region 

 covered 3, 900 square miles during an eight weeks' field season and mapped the 

 east Denbigh and east Kaladar map sheets. Another forester covered approx- 

 imately 3, 000 square miles in the Sault Ste. Marie district during a fourteen 



