WHITE PINE UNDER FOREST MANAGEMENT. 
69 
Thickness of Bark. 
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 baric — Southern Appalachians} 
Diameter 
Thick- 
Diameter 
Thick- 
Diameter 
Thick- 
Diameter 
Thick- 
breast 
ness of 
breast 
ness of 
breast 
ness of 
breast 
ness of 
high. 
bark. 
high. 
bark. 
high. 
bark. 
1 
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 j 
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 
2.44 
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 
20 
2.02 
30 
2.86 
40 
4.04 
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. 
i » 
Age. 
1 
Yield per 
acre. 
Age. 
i 
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. 
Average 
height. 
Total 
trees per 
acre. 
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 
Number. 
2,220 
1,700 
1,600 
Number. 
Cords. 
Years. 
40 
45 
50 
55 
60 
Feet. 
54 
62 
68 
79 
76 
Number. 
690 
510 
400 
300 
260 
Number. 
540 
460 
380 
300 
260 
Cords'. 
38 
45 
53 
65 
80 
22 
32 
45 
1,310 
1,090 
885 
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. 
