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Table 1 Number of trees by diameter class in three datasets used in this study. A total of 1218 trees (1093 Douglas-fir and 125 western hemlock) were used

From: Estimating upper stem diameters and volume of Douglas-fir and Western hemlock trees in the Pacific northwest

DBH Class (cm) DATASET I DATASET II DATASET III
Douglas-fir Western hemlock Douglas-fir Douglas-fir Western hemlock
4–8    14   
8–12 5   58   
12–16 6   104   
16–20 42 9 89 2 1
20–24 62 5 62 4 4
24–28 68 14 35 3 1
28–32 72 13 22 2 1
32–36 75 12 8 7 3
36–40 62 15 4 9 3
40–44 54 10 3 7 2
44–48 47 8   13 1
48–52 30 4   6 1
52–56 25 4   10 2
56–60 19 1   4 1
60–64 13 2   1  
64–68 7 1   3 2
68–72 9 1   1 2
72–76 5 1    
76–80 6     
80–84 5    1  
84–88     1  
88–92 2     
92–96 1    1  
96–100     1  
100–104   1    
108–112     1  
112–116     2  
Total 615 101 399 79 24