Experimental regeneration cuttings and small scale thinnings constitute 

 the main work. In order to assess the effects of the lesser vegetation on the 

 survival and development of tree seedlings, the phonological studies begun In 

 1953 are continuing. The meteorological studies begun In 1952 are being main- 

 tained, the present objective being to Investigate the changes In ecocllmate due 

 to the various methods of cutting* Additional projects of a supplementary nature 

 Include the following: (1) An ecological Investigation of a natural burn, (2) a 

 study of the sllvlcultural significance of forest succession, (3) a study of the 

 effects of wildlife on vegetation, (k) a radial Increment study using a dial 

 gauge dendrometer, (5) a reproduction cutting In a tolerant hardwood stand, and 

 (6) a collection of tree volume data for volume table construction* 



Greenhouse Research 



An Investigation Is being conducted to correlate amounts of plant 

 nutrients In sand culture with concentrations of the same nutrients In the foliage* 

 Work Is also being done under controlled conditions to study the basic causes of 

 compression wood formation In conifers* 



Co-operative Experiment at Heron Bay, Ontario (RC-17) 



This experimental work, conducted by several co-operating public and 

 private agencies. Is designed to find satisfactory means of obtaining spruce 

 regeneration In upland mlxedwood stands* The Division of Research Is responsible 

 for some of the ecological studies, the site mapping, and the technical direction 

 of the project* 



The Reforestation-Research Co-operative Program 



A co-operative program has been developed between the Reforestation and 

 Research divisions to apply research methods and findings to the evaluation and 

 solution of problems of reforesting Crown lands* Work done In 195^ Included! 

 (1) Site Inventory — to assess conditions from an ecological point of view with 

 particular respect to planting problems, and (2) experimentation — to test 

 methods of reforesting unproductive land and converting stands of unmerchantable 

 hardwood* The first experiment, an underplantlng and release experiment, was 

 established In 195^. 



