ii6 



Canadian Forestry Journal, March, ic)20 



Premier and Government of British 

 Columbia, and an example of the mar- 

 vellous tree growths that make the 



forests of that fine province some of 

 the richest on the face of the globe. 

 The Gardeners'' C/iro?izc/e, Jan. 2 ith, llJ'-iO 



Great Profits from Forests in the 

 French Jura 



By Theodore S. Woolse^, Jr. {Formerly Lt. -Col. U.S. Engineers) 

 Written for the Canadian Forestry Journal 



71,000 Board Feet per Acre Produced Under Careful System 



of Forest Management 



One of the questions asked by pri- 

 vate forest owners and others inter- 

 ested in the yield of forests, is what 

 will forests (naturally regenerated) 

 return in lumber or money? The 

 answers given to this question by 

 normal yield tables, usually based on 

 planted stands, are often so high that 

 they cannot be applied to Canadian 

 or American conditions without much 

 guesswork and modification. Actual 

 averages of compartments or whole 

 forests are more reliable for purposes 

 of judging what forestry can attain. 

 Therefore the statistics* that follow, 

 for fir-spruce forests in the Jura 

 mountains of France, somcAvhat com- 

 parable to spruce-fir stands of north- 

 ern New England or Southern Can- 

 ada, are of particular interest and 

 value. They show what forestry can 

 attain (as a maximum) under favor- 

 able conditions on non-agricultural 

 mountain land over whole compart- 

 ments of 15 to 30 acres. 



(a) Compartment 18, 5th working 

 group, State Forest of La Joux (2nd 

 Jura Plateau), 60% fir and 40 ^^ 

 spruce, fully stocked thrifty stand, 

 planted after a windfall in 1812 ; lOO 

 years old in 1912. 



*Based on unpublished data supplied by Deva- 

 rennes, Inspector, French Forest Service, in charge 

 of Jura working plans in 1912. Canadian Forestry 

 troops operated on an extensive scale in the Forest 

 of La Joux. _ • 



Per Acre. 



(b) Same forest and working group 

 but compartment 19, and from en- 

 tirely natural regeneration ; 100 years 

 old, but 90^c fir and 10% spruce. 



Per Acre. 



*These conversions (a, b, c, d) were made as 

 follows: For 10 inch trees 4 cubic metres were 

 counted to the 1,000 feet, after 30 per cent, sub- 

 tracted for cordwood. In the other diameter 

 classes 3 cubic inches were counted to the 1,000 

 feet after subtracting 20 per cent, for the cordwood 

 in the 16 and 22 inch classes, and only 10 per cent, 

 of the 28 inch class. Two cords were considered 

 equal to 1,000 board feet. 



Such yields seem incredibly high, 

 and the larger number of trees and 

 the higher yield on the area naturally 

 regenerated is especially noteworthy. 

 The fact remains that these yields 



