BALSAM FIR. 
33 
Table 8. — Comparative groivih of balsam fir seedlings, in Franklin County, N. Y\, in 
the shade 1 and in full light. 2 
Age (years). 
Height of 
average trees 
under aver- 
age condi- 
tions of shade. 
Feet. 
0.1 
.2 
.3 
.5 
.6 
1.1 
1.3 
Height of 
best trees 
under full 
light. 
Feet. 
0.1 
.2 
.4 
.7 
1.0 
1.5 
1.9 
2.5 
3.0 
Age (years). 
10 
11 
12 
13 
14 
15 
16 
17 
IS 
Height of 
under aver- 
age condi- 
tions of shade. 
Feet. 
Height of 
best trees 
under full 
light. 
Feet. 
1.6 
3.6 
1.9 
4.3 
2.1 
5.1 
2.4 
5.8 
2.6 
6.6 
2.8 
7.4 
3.1 
8.2 
3.3 
8.9 
3.5 
9.7 
Based on 324 trees. 
2 Based on 104 trees. 
Thus, with conditions of growth obtaining under forest manage- 
ment, the growth in height of balsam fir would be increased more 
than two and one-half times during the first 18 years of its life (9.7 
feet as compared with 3.5 feet). 
Tables 9 and 10 give the average growth in height on flat, swamp, 
and hardwood slope in the State of New York, based on age. 
Table 9. — Height growth of balsam fir in New York, on the basis of age, on flat, swamp, 
and hardwood slope. 
Age (years). 
Flat. 
(Based on 248 trees.) 
Swamp. 
(Based on 158 trees.) 
Hardwood slope. 
(Based on 277 trees.) 
Maxi- 
mum. 
Mini- 
mum. 
Average. 
Maxi- 
mum. 
Mini- 
mum. 
Average. 
Maxi- 
mum. 
Mini- 
mum. 
Average. 
Feet. 
Feet. 
Feet. 
Feet. 
Feet. 
Feet. 
Feet. 
Feet. 
Feet. 
10 
8 
3 
5 
10 
3 
4 
8 
3 
5 
15 
13 
7 
9 
15 
6 
15 
6 
9 
20 
18 
11 
14 
19 
8 
11 
22 
9 
14 
25 
24 
15 
19 
24 
10 
15 
28 
13 
19 
30 
29 
19 
23 
28 
12 
19 
34 
17 
24 
35 
34 
22 
27 
32 
14 
23 
40 
21 
,30 
40 
39 
25 
31 
36 
16 
27 
45 
25 
35 
45 
44 
27 
35 
39 
18 
30 
50 
29 
39 
50 
49 
29 
38 
42 
20 
32 
54 
32 
43 
55 
52 
30 
41 
45 
21 
34 
58 
35 
4: 
60 
56 
32 
43 
48 
23 
36 
61 
38 
49 
65 
59 
33 
45 
51 
24 
38 
64 
40 
52 
70 
61 
34 
' 47 
53 
25 
40 
66 
42 
54 
75 
63 
35 
49 
55 
26 
41 
68 
43 
56 
80 
65 
36 
51 
57 
27 
43 
69 
45 
57 
85 
67 
37 
52 
59 
28 
44 
70 
45 
58 
90 
68 
38 
53 
60 
29 
46 
71 
46 
59 
95 
69 
39 
54 
62 
30 
47 
72 
47 
60 
100 
70 
39 
55 
63 
30 
48 
73 
47 
61 
105 
71 
40 
56 
64 
31 
49 
73 
48 
61 
110 
72 
41 
57 
65 
32 
50 
74 
48 
62 
115 
72 
42 
58 
66 
32 
51 
74 
49 
32 
120 
73 
42 
59 
67 
33 
52 
75 
49 
63 
125 
74 
43 
59 
68 
34 
52 
75 
49 
63 
130 
74 
44 
60 
69 
34 
53 
75 
50 
63 
135 
74 
45 
60 
70 
35 
53 
76 
50 
63 
140 
75 
46 
61 
70 
35 
54 
76 
50 
63 
145 
75 
46 
62 
71 
36 
54 
76 
51 
64 
150 
75 
47 
62 
72 
37 
55 
76 
51 
64 
20137°— Bull. 55—14 5 
