﻿WHITE PINE UNDER EOKEST MANAGEMENT. 

 Thickness of Bark. 



69 



Table 30 shows the thickness of bark on a radial section for white pine of various 

 diameters in the Southern Appalachians. It also applies very generally throughout 

 the tree's range. 



Table 30. — -Thickness of bark — Southern Appalachians? 



Diameter 



Thick- 



Diameter 



Thick- 



Diameter 



Thick- 



1 

 Diameter 



Thick- 



breast 



ness of 



breast 



ness of 



breast 



ness of 



breast ; 



ness of 



high. 



bark. 



high. 



bark. 



high. 



bark. 



high. 



bark. 



Inches. 



Inches. 



Inches. 



Inches. 



Inches. 



Inches. 



Inches. 



Inches. 



1 



0.14 



11 



1.20 



21 



2.10 



31 



2.94 



2 



.28 



12 



1.30 



22 



2.20 



32 ! 



3.04 



3 



.40 



13 



1.38 



23 



2.28 



33 \ 



3.16 " 



4 



.52 



14 



1.44 



24 



2.36 



34 



3.28 



5 



.64 



15 



1.54 



25 



2.14 



35 



3.40 



6 



.74 



16 



1.64 



26 



2.52 



36 : 



3.50 



7 



.86 



17 



1.72 



27 



2.60 



37 



3.64 



8 



.96 



18 



1.84 



28 



2.68 



38 ' 



3.76 



9....-,. 



1.02 



19 



1.94 



29 



2.76 



39 ! 



3.90 



10 



1.10 





2.02 



30 



2. 86 



40 



4.04 



1,1 From measurements taken under the direction of F. E. Olmsted. 

 Yield Tables. 



Table 31 shows the average yield per acre of white-pine stands of various ages in the 

 Lake States. The trees were scaled by the Scribner Decimal C rule, and the figures are 

 an average of a large number of acres. The figures are for virgin forest and not for 

 second growth, and for this reason are greatly below the yield given for second-growth 

 white pine in Table 6, page 23. 



Table 31. — Yield per acre, virgin forest — Minnesota. 1 



Age. 



Yield per 



acre. 



Age. 



t 



Yield per 

 acre. 



Age. 



Yield per 

 acre. 



Age. 



Yield per 

 acre. 



Years. 

 50 

 60 

 70 

 80 



Boardfeet. 



8,000 



12, 500 



16, 700 



20, 000 



| Years. 



90 



100 



110 



120 



Boardfeet. 

 23, 500 

 28, 000 

 33, 500 

 39, 700 



Years. 

 130 

 140 

 150 

 160 



Boardjeet. 

 46, 000 

 53,000 

 59,300 

 65, 000 



Years. 

 170 

 180 



Boardfeet. 

 70,300 

 75,500 



1 Data collected by H. H. Chapman. Computed by Scribner Decimal C rule. 



Tables 32 and 33 show the yield per acre, in cords, of pure stands of second growth 

 white pine in New England. 



Table 32. — Yield of fully stocked stands of second-growth white pine in New England. 1 



Age of 

 stand. 



! 



Averse Total 

 _v\eiage f rpp „ _„_ 



hei § ht - ! acre P 



Mer- 

 chant- 

 able 

 trees per 

 acre. 



Yield 

 per acre. 



Age of 

 stand. 



Average 

 height. 



Total 



trees per 



acre. 



Mer- 

 chant- 

 able 

 trees per 

 acre. 



Yield 

 per acre. 



Years. 

 10 

 15 

 20 

 25 

 30 

 35 



Feet. 



5 



9 

 14 

 22 

 32 

 45 



Number. 

 2,220 

 1,700 

 1,600 

 1,310 

 1,090 

 885 



Number. 



Cords. 



Years. 

 40 

 45 

 50 

 55 

 60 



Feet. 

 54 

 62 

 6S 

 72 

 76 



Number. 

 690 

 510 

 40ii 

 300 

 260 



Number. 

 540 

 460 

 380 

 300 

 260 



Cords. 

 38 

 45 

 53 

 65 



so 











400 

 510 

 620 



11 

 21 

 30 



1 From "The Natural Replacement of White Pine on Old Fields in New England," by S. N. Spring, 

 Bulletin 63, Forest Service. 



