28 
BULLETIN 299, U. S. DEPARTMENT OF AGRICULTURE. 
age rate of growth in diameter and height nearly equal to that of fast 
growth under natural forest conditions. 
Table 8 shows the rate of growth of white ash under less favorable 
conditions in southern Indiana. 
Table 8 — Rate of growth of white ash on fair upland clay soil in southern Indiana, based 
jjn 81 trees 62 to 152 years old. 1 
Age. 
Fast growth. 
Average growth. 
Diameter 
breast- 
high. 
Height. 
Diameter 
breast- 
high. 
Height. 
Years. 
10 
20 
30 
40 
50 
60 
70 
80 
90 
Inches. 
1.1 
2.5 
4.1 
5.9 
8.2 
10.9 
14.4 
18.4 
22.8 
Feet. 
19 
34 
45 
54 
62 
68 
73 
78 
82 
Inches. 
0.6 
1.6 
2.5 
3.5 
4.6 
6.0 
7.9 
10.3 
13.2 
. Feet. 
8 
17 
26 
34 
41 
47 
52 
57 
61 
1 The acceleration in growth at about 50 years is due to a thinning of tbe forest. Measurements taken by 
W. Stone in 1909. 
Table 9 shows the rate of growth of white ash in natural selection 
forests containing trees of all ages. 
Table 9. — Rate of growth of white ash in natural selection forests, based on 179 trees 77 
to SOS years in age, east of the Mississippi River, from. Tennessee north. 
Age. 
Diameter breast-high. 
Height. 
Maxi- 
Average 
Fast 
Average 
Fast 
mum. 
growth . 
growth. 
growth. 
growth. 
Years. 
Inches. 
Inches. 
Inches. 
Feet. 
Feet. 
10 
2.7 
0.6 
1.6 
8 
11 
20 
6.7 
1.8 
3.9 
14 
21 
30 
11.4 
3.1 
6.8 
21 
32 
40 
16.5 
4.4 
10.1 
27 
44 
50 
20.7 
6.0 
13.6 
35 
55 
60 
24.3 
7.7 
16.9 
43 
65 
70 
27.4 
9.5 
Iff.* 
52 
73 
80 
30.1 
11.4 
22.5 
60 
80 
90 
32.3 
13.2 
24.9 
67 
86 
100 
34.3 
14.9 
27.1 
74 
91 
110 
36.1 
16.7 
29.1 
80 
95 
120 
18.2 
30.9 
85 
100 
130 
19.8 
32.6 
90 
103 
140 
150 
21.2 
22.7 
34.2 
35.7 
94 
98 
108 
HI 
160 
24.0 
101 
170 
25.4 
104 
180 
26.8 
106 
190 
200 
28.1 
29.4 
109 
111 
210 
30.7 
113 
220 
230 
31.9 
33.1 
114 
116 
240 
34.3 
118 
250 
35.5 
119 
It will be seen by comparison with Table 7 that the growth is con- 
siderably slower than that of comparatively even-aged second-growth 
with better light conditions. The fast growth in Table 9 about repre- 
sents the possibilities under proper management. 
