136 Forestry Quarterly. 



Of course, large individuals are common, especially where there 

 is a lower story of hardwoods. Thus the "Konigskiefer" near 

 Eberswalde is 36 inches in diameter and over one hundred feet in 

 height with 80 feet of clear length. 



To give a clearer idea of the average yield, the following Yield 

 Table is taken from Dr. Schwappach's work "Die Kiefer" (The 

 Pine). 



Yield Table for Scotch Pine — /// Site — For one acre fully 



stocked. 



'U 





^ tv^ ^ >., ^ f^ 



Feet B. M. per Acre. 

 10, 



20, 4,760 476 4,760 



30, 13,600 884 170 170 13,770 



40, 23,800 1,020 1,530 1,700 25,500 



50, 33490 969 3»9io 5.610 39.100 



60, 41.140 765 4.420 10,030 51.170 



70, 47,260 612 4,080 14,110 61,370 



80, 52,190 493 3,910 18,020 70,210 



90, 56,440 425 3.570 21,590 78,030 



100, 60,180 374 3,230 24,820 85,000 



no, 63,580 340 2,890 27,710 91,290 



120, 66,810 323 2,380 30,090 96,900 



Volumes include all wood over 2.76 inches in diameter. 



The usual rotation is 120 years which naturally divides into six 

 age classes of 20 years each. For the sake of convenience, the 

 periods are usually made to conform with the age class divisions. 

 Thus the stands of the first period of working are those from 100 

 to 120 years old, the stands of the second period of working 

 those from 80 to 100 years, etc. However, the working plan is 

 usually for ten years only, with a complete revision at the end 



