Forest Management 33 



as individuals or as aggregates according to their financial merits. 

 The trees are divided into four classes: 



(a) Money makers, promising to increase in stumpage value at a 



rate of interest higher than normal; trees to be preserved. 



(b) Indifferent trees, yielding a normal rate of interest, merely, 



through growth in volume, value and price; trees to be pre- 

 served or cut. 



(c) Idlers, merchantable trees yielding an inadequate rate of in- 



terest; trees to be cut. 



(d) Weeds, trees of negative value (not merchantable), never 



promising any revenue; trees usually left to rot. 



Practical experience in the woods, in the mill and in the office is 

 required to allot a given tree correctly to one of the four classes given. 

 Volume tables are of little use in the determination of the maturity of 

 a tree. 



8. A sustained yield is recommended only when it promises greater 

 safety or higher remunerativeness of the investments. 



Schenck's working plan reports consist of the three parts given in 

 Chapter III, viz.: 



first part, detailed statement of facts; 

 second part, statement of the owner's desire; 

 third part, detailed plan of action. 



The plan of action weighs the financial merits of all methods of 

 development or treatment possible under the prevailing conditions and 

 shows the financial superiority of its own recommendations over any 

 other proposed plan of management. 



The heads under which the first part and the third part are treated 

 should be those given in paragraph XVI. 



The "installation period" is the time required for the proper adjust- 

 ment of all investments. 



The annual working plan is an annual budget. It dwells in detail on 

 that part of all provisions of the chief working plan which should "be 

 carried out in a given year of the period of installation. 



