112 



FOREST REGULATION 



b. Rotation for Largest Volume or Yield of wood 

 per acre and year. 



This usually refers to "cordwood and better" (about 3" thick 

 and over), but in many localities abroad, includes even faggot 

 material. As stated before, this Rotation was entirely proper when 

 certain forests had to supply a large population with fuel, so that 

 fuel had to be shipped into the districts. Today such a Rotation is 

 the exception, but may again come into use with development of the 

 Pulp industry and better facilities for marketing and shipping- 

 materials demanded in the slack barrel, box board and other 

 industries. 



Rotation for largest volume in Germany and for fair to good 

 site (site II) is about as follows: 



Pine 60 years 



Spruce 90-100 years 



Beech and Balsam 110-120 years 



This fits in very nicely with the technical Rotation for these species. 



c. Rotation of Largest Yearly Income. 



The following figures will illustrate what is meant here : One 

 acre of Spruce on Site II in Germany may present, the following- 

 conditions : 



This table indicates that if the stand is cut at forty years the 

 net income is $163, an average of $4.00 per acre and year; if cut at 

 no total net income is $1808 or $16.40 per year and acre. After 



