36 
BULLETIN 933, IT. S. DEPARTMENT OF AGRICULTURE. 
on large logs. Trees in plantations, therefore, should be grown as 
long as they appear sound and healthy. Of course, it is impossible 
to tell at this time what scale of log prices will be used 150 years 
hence, but, nevertheless, the plantation should be managed with a 
long rotation in mind. 
Table 15. — Value of individual trees. 
Diameter 
Volume 
Value 
Diameter 
Volume 
Value 
breast 
board 
at rail- 
Age. 
breast 
board 
at rail- 
Age. 
thigh. 
feet. 
road. 2 
thigh. 
feet. 
road. 2 
Inches. 
Years. 
Inches. 
Years. 
13 
18 
SO. 36 
42 
22 
190 
$8.20 ' 
79 
14 
27 
.54 
45 
23 
230 
10. 80 
85 
15 
40 
.75 
48 
24 
270 
13.80 
92 
16 
52 
1.00 
51 
25 
320 
17.30 
100 
17 
70 
1.70 
55 
26 
380 
21.50 
110 
18 
88 
2.40 
59 
27 
445 
26.50 
121 
19 
110 
3.40 
63 
28 
520 
32.20 
132 
20 
132 
4.70 
68 
29 
615 
39.90 
147 
21 
160 
6.10 
73 
30 
720 
49.00 
1 This table applies to individual trees in groves or open woodlands and not to trees grown singly in 
the open field. The prices were those current in the year 1918. 
2 As the stumpage price is so variable, depending upon the length of haul, the value of the trees delivered 
at the railroad is the most constant figure that may be given. Stumpage value may be figured by sub- 
tracting cutting and hauling expenses from the value of the logs delivered. 
The number of trees on a well-managed plantation will at all times 
show the maximum that can be grown to the best advantage. The 
reduction from year to year will be accomplished by frequent thin- 
nings and will not be left to the processes of nature that lead to ex- 
cessive mutual suppression and to stagnation of growth. Such a 
plantation on good soil should yield logs somewhat as shown in 
Table 16. The calculation is believed to be conservative for the 
Ohio Valley and northeastern region, but possibly it is somewhat 
high for the trans-Mississippi States, where height growth is not 
generally so good and where merchantable length is, therefore, some- 
what less. 
Table 16. — Possible yield of blaek walnut plantations. 
Age 
(years). 
Average 
diameter 
breast high 
(inches). 
Number 
of trees 
per acre. 1 
Board feet 
per acre. 
Value per 
acre. 2 
10 
20 
30 
40 
50 
60 
70 
80 
90 
100 
1.2 
5.0 
8.8 
12.5 
15.7 
18.3 
20.6 
22.2 
23.8 
25.0 
2,700 
700 
280 
160 
100 
85 
70 
65 
55 
50 
4,800 
8,500 
10,500 
13,000 
14,300 
16,000 
$83.00 
229. 50 
387. 80 
566. 80 
726. 00 
865.00 
i Derived from Table 1, p. 2, Farmers Bulletin 711, "The Care and Improvement of the Woodlol," by 
C R. Tillotson. 
2 Based on the value of logs delivered at the railroad and not on the value of the stumpage, as the latter 
is too largely conditioned by cutting and hauling expense. 
If a plantation, initiated with wider spacing, is left to grow into 
merchantable timber, the production will be less than that indicated 
