A tree grading system has been evolved and partly tested by stem 

 analyses and a small-scale lumber recovery study. 



A critical analysis of defects which are associated with the natural 

 pruning of sapling and pole- sized sugar maple was carried out with the co-opera- 

 tion of the Forest Pathology Laboratory, Canada Department of Forestry, Maple, 

 Ontario. This is part of an initial phase in a moderately Intensive study to 

 determine the developmental nature of decay, stain and other defects under various 

 stand and site conditions. 



Eight acres of a hardwood stand were fenced to exclude deer from a 

 study area which underwent treatments to improve stand conditions and to regen- 

 erate yellow birch. 



Further trials with tubed seedlings have indicated a need for an ex- 

 pansion of this study in connection with producing the planting stock. This work 

 will include the use of tubes of various size and materials and also different 

 growing media. 



South-Westem Region 



Research studies in the South-Westem Region were based on a program 

 established several years ago. This consists of research on tree species 

 (silvics), forest management, forest chemicals, mechanics, and soil conservation. 

 Each section has one to several projects. 



Tree species research is confined to hard maple, silver maple and to 

 a lesser degree bur oak, basswood and white ash. In addition to studying the 

 characteristics of these species, many woodlots were inspected for high quality 

 phenotypes which should be of value for improving the timber quality of hardwood 

 stands in southern Ontario. The selection of high quality trees was greatly 

 aided by developing quality standard tables. 



H 



