112 



I'OKlilST RKGUI.ATI(JX 



b. Rotation for Largest Volume or Yield of wood 

 per acre and year. 



This usiiall)' refers to "cordwood and better" (about 3" thick 

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

 material. As stated before, this Rotation was entirely jjroper 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 ''» years 



Spruce (p-too years 



Peech and Balsam 1 10-120 years 



This fits in verv nicely with the technical Rotation for tliese sjjccies. 



c. Rotation of Largest Yearly Income. 



The following figures will illustrate what is meant here: (Jne 

 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 

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

 1 10 total net income is $1808 or $16.40 per year and acre. After 



