4i6 Forestry Quarterly. 



2. Value of Poles Destroyed: The value of the poles is the 

 value of the merchantable timber which they will make dis- 

 counted for a period equal to the difference between 75 years 

 (the average age of a 12" tree)* and the average age of the poles 

 at the time of the fire. This does not allow for the death of 

 suppressed poles because the openness of a yellow pine stand 

 is such that but few poles die of suppression. Where the stand 

 is dense the suppressed pole can be counted out in the estimate. 

 The average of these poles can be found by getting an average 

 diameter and looking up this diameter in the growth table. 



The stumpage value should be the stumpage value of that part 

 of the forest on which the burn is located, increased by the per 

 cent, given for the number of years between the average age of 

 the stand and 75. (See page 413.) 



These poles form the basis of future cuts for the next 100 

 years, and, if the data were available we should figure the expec- 

 tancy value of the pole stand for each felling period e. g., 30, 60, 

 90, 120, years, etc.f 



But since such data are not available, the above method, of 

 which the following example is given, is used for simplicity : 



Bxample: 10,000 poles destroyed ; volume of a 12" tree equals 

 70 board feet (Woolsey's tables) ; volume of 10,000 poles equals 

 700 M. Board feet; average diameter of poles equals 9"; average 

 age of poles equals 55 ; 20 years is time required for poles to 

 become merchantable ; $2.00 increased 100% equals $4.00 the 

 stumpage price in 20 years; 70oX$4-00 equals $2,800, the value 

 of the poles in 20 years ; to discount $2,800 for 20 years to the 

 present at 5% multiply by .377; $2,8ooX-377 equals $1,055.60 

 the present value of the poles destroyed. 



3. Value of Reproduction Destroyed: Determine the actual 

 area of forest fully stocked with reproduction which has been 

 burned over. Add to this the area of scattered reproduction 

 reduced to acres fully stocked. The result will be the actual 

 number of acres fully stocked with reproduction which have been 

 burned over. 



Multiply the number of acres of fully stocked reproduction by 

 4,300 feet, the average volume on a fully stocked acre 75 years 



*From an average of growth tables collected by Mr. T. S. Woolsey, Jr. 

 fThis presupposes the group selection system, the one adapted to 

 Western Yellow Pine. 



