Canadian Forestrij Journal, December, Iff 17 



1 1 I' 





How Fast Does a Forest Rebuild Itself ? 



The rate of growth of trees in the forest is usually exaggerated 

 greatly. 



Dr. C. D. Howe, who during the past summer made a study 

 of the reproduction and growth of the pulpwood species after logging, 

 in the St. Maurice \'alley, Quebec, on behalf of the Commission of 

 Conservation, produced the following conclusions: 



Over 2,000 trees were analyzed to determine their rate of growth 

 in diameter, height and volume. While the results of this study 

 have not yet been tabulated, they have gone far enough to justify 

 the statement that within the forest type under consideration, it 

 takes about 40 years for the little spruce trees to accjuire a diameter 

 of one inch: 100 years to make a six-inch tree, and 150 years to reach 

 the minimum diameter limit of 12 inches established by the cutting 

 regulations in Quebec, for white and black spruce. Balsam grows 

 somewhat faster. A one-inch tree is made in about 16 years, and 

 it takes in the neighborhood of 70 years to reach the Quebec diameter 

 limit of seven inches at two feet from the ground. 



PRAIRIE GARDENS, INDIAN HEAD, SASK. 



By the provision of trees and shrubs and the encouragement of Improved environment round the 

 farms, a means is found to make farm life more attractive. 



