Regional Research office actively participated In the planning and execution of 

 these programso A series of permanent sample plots were established to evaluat* 

 the work, which was primarily a release program In second growth tolerant hard- 

 wood stands* The sample plots were established with a view to studying the 

 following! 



1) The effectiveness of Esteron 2-*f-yr as a basal spray 

 11) The response of the trees selected for release 

 111) The results of direct seeding of pine, spruce, and birch. 



SOUTH WESTERN REGION 



L» Sllvlcs and Silviculture of Silver Maple 



The study, established In 1953 In a 19-year old silver maple stand of 

 sopplce origin, was continued In 195^* All live trees, following three degrees 

 3f thinning by poisoning and cutting, were tallied by d«b*ho A record was kept 

 jf the number, size, and occurrence of coppice from stumps cut at four different 

 periods of the year, as well as the occurrence of epicormic branching. Effects 

 >f thinning by poisoning and cutting on the regeneration and ground cover was 

 loted* 

 2» Poisoning as a Silvi cultural Tool 



A silver maple stand was thinned using Esteron 2-^-5^ in late 1953 and 

 Ln 195^» The stand was given three degrees of thinning (light, medium, and heavy). 

 Cn all instances, the poorest trees were removed to permit unimpeded growth for 

 the "select" trees. 



A second growth silver maple-white elm stand was also thinned with 

 isteron 2-^-5^. In this Instance only the low quality elm were removed. All 

 treated trees had %o be girdled or frilled to permit the poison to reach the 

 sambium layer. Results were not satisfactory as the elm appeared to be somewhat 

 resistant to the poison. 

 5. Use of Dalapouy a Grass Poison^ to Assist in Natural and Artificial Regeneration 



These studies will be expanded in 1955 and 1956 providing there is a 

 seed year on the commercially important tree species in the region. 

 *"• Woodlot Studies 



Mr. I. C. Marritt, District Forester at Hespeler, established ten years 



igo a series of permsment sample plots in various woodlot s throughout the Huron 



)istriet. The Research Division has undertaken to assist the District staff in 



studying these plots* 



1^ 



