58 BULLETIN 55, U. S. DEPARTMENT OF AGRICULTURE. 
Table 47. — Yield of balsam fir in Maine, based on 22 sample plots, covering an area 
of 6 acres. 
FLAT. 
Plot No. 
Age oi 
stand. 
l rees cut 
per acre. 
1 OT al 
yield. 
Yield 
without 
bark. 
Merchantable volume. 
Mean 
annual 
increment 
per acre. 
- 
Cubic feet. 
Cubic feet. 
Cubic feet. 
Cords. 
Cubic feet. 
1 
90 
152 
2,395 
2, 156 
2,149 
22.6 
26.6 
2 
90 
144 
2,763 
2,501 
2,460 
25.9 
30.7 
3 
70 
160 
2.543 
2, 268 
2,330 
24.5 
36.3 
4 
70 
100 
1 357 
1 212 
1,239 
13.0 
19. 4 
80 
168 
2^937 
2^614 
2,704 
28.4 
36^7 
6 
90 
200 
3,739 
3,364 
3,504 
36.8 
41.5 
90 
160 
3,010 
2,674 
3,010 
31.6 
33.4 
8 
90 
132 
2,936 
2,627 
2,675 
28.1 
32.6 
9 
90 
136 
2,789 
2,473 
2,512 
26.4 
31.0 
10 
90 
86 
1,408 
1,261 
1,259 
13.2 
15.6 
11 
70 
144 
2,811 
2,435 
2,590 
28.3 
40.1 
12 
90 
120 
2,115 
1,896 
1,910 
20.0 
23.5 
13 
90 
168 
2,689 
2,388 
2.497 
26.2 
29.8 
Average 
144 
2,575 
25.0 
130.5 
HARDWOOD SLOPE. 
14 
90 
80 
1,666 
1,490 
1,547 
16.2 
18.5 
15 
80 
88 
1,342 
1,214 
1,240 
13.0 
16.8 
16 
80 
60 
1,034 
930 
957 
10.0 
12.9 
17 
80 
68 
963 
868 
881 
9.2 
12.0 
18 
90 
96 
1.861 
1.668 
1,683 
17.7 
20.6 
19 
90 
122 
2.165 
1,945 
1.933 
20.3 
24.0 
20 
80 
48 
534 
485 
480 
5.0 
6.6 
21 
100 
62 
1.170 
1.040 
1.050 
11.0 
11.7 
22 
90 
52 
1,226 
1,085 
1,112 
11.7 
13.6 
Average 
75 
1,329 
12.6 
2 15.2 
1 Equals one-third cord. 2 Equals one-sixth cord. 
OVER LARGE AREAS. 
The figures in Tables 46 and 47 represent the yield of carefully 
selected small areas of balsam-fir stands. Over large areas, including 
all types of land, the yield is much smaller. The results of measure- 
ments of nearly 60,000 acres in three townships of Hamilton County, 
N. Y., gave an average yield per acre for all types of coniferous lands 
of 4.4 standards, or 1.5 cords (Table 48). 
