Montana Forestry Incentive Program (FIP) Tree Thinning Table
Forestry Technical Note Number MT-20
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page, please contact Technical Resources at 406-587-6822.
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Forestry
Technical Note Number MT-20 (PDF; 173 KB)
February 2001.
The following table is for estimating the time to perform a tree
thinning based on the average diameter of cut tree (D) and the number of stems
per acre cut (S). This spreadsheet will reduce the time required to calculate
such estimates.
Feel free to use this or the formula (TIME = -1.965 + .00374S = .00085SD +
2.3655D) that we have been using to calculate the time.
Thinning Time (Hours per Acre)
| S/D |
0.7 |
0.8 |
0.9 |
1.0 |
1.2 |
1.4 |
1.6 |
1.8 |
2.0 |
2.2 |
2.4 |
2.6 |
2.8 |
3.0 |
3.2 |
3.4 |
3.6 |
3.8 |
4.0 |
| 50 |
-0.1 |
0.1 |
0.4 |
0.6 |
1.1 |
1.6 |
2.1 |
2.6 |
3.0 |
3.5 |
4.0 |
4.5 |
5.0 |
5.4 |
5.9 |
6.4 |
6.9 |
7.4 |
7.9 |
| 100 |
0.1 |
0.4 |
0.6 |
0.9 |
1.3 |
1.8 |
2.3 |
2.8 |
3.3 |
3.8 |
4.3 |
4.8 |
5.3 |
5.8 |
6.3 |
6.7 |
7.2 |
7.7 |
8.2 |
| 150 |
0.3 |
0.6 |
0.8 |
1.1 |
1.6 |
2.1 |
2.6 |
3.1 |
3.6 |
4.1 |
4.6 |
5.1 |
5.6 |
6.1 |
6.6 |
7.1 |
7.6 |
8.1 |
8.6 |
| 200 |
0.6 |
0.8 |
1.1 |
1.3 |
1.8 |
2.3 |
2.8 |
3.3 |
3.9 |
4.4 |
4.9 |
5.4 |
5.9 |
6.4 |
6.9 |
7.4 |
7.9 |
8.4 |
8.9 |
| 250 |
0.8 |
1.0 |
1.3 |
1.5 |
2.1 |
2.6 |
3.1 |
3.6 |
4.1 |
4.6 |
5.2 |
5.7 |
6.2 |
6.7 |
7.2 |
7.7 |
8.3 |
8.8 |
9.3 |
| 300 |
1.0 |
1.3 |
1.5 |
1.8 |
2.3 |
2.8 |
3.3 |
3.9 |
4.4 |
4.9 |
5.4 |
6.0 |
6.5 |
7.0 |
7.5 |
8.1 |
8.6 |
9.1 |
9.6 |
| 350 |
1.2 |
1.5 |
1.7 |
2.0 |
2.5 |
3.1 |
3.6 |
4.1 |
4.7 |
5.2 |
5.7 |
6.3 |
6.8 |
7.3 |
7.9 |
8.4 |
8.9 |
9.5 |
10.0 |
| 400 |
1.4 |
1.7 |
2.0 |
2.2 |
2.8 |
3.3 |
3.9 |
4.4 |
4.9 |
5.5 |
6.0 |
6.6 |
7.1 |
7.6 |
8.2 |
8.7 |
9.3 |
9.8 |
10.4 |
| 450 |
1.6 |
1.9 |
2.2 |
2.5 |
3.0 |
3.6 |
4.1 |
4.7 |
5.2 |
5.8 |
6.3 |
6.9 |
7.4 |
8.0 |
8.5 |
9.1 |
9.6 |
10.2 |
10.7 |
| 500 |
1.9 |
2.1 |
2.4 |
2.7 |
3.3 |
3.8 |
4.4 |
4.9 |
5.5 |
6.0 |
6.6 |
7.2 |
7.7 |
8.3 |
8.8 |
9.4 |
10.0 |
10.5 |
11.1 |
| 550 |
2.1 |
2.4 |
2.6 |
2.9 |
3.5 |
4.1 |
4.6 |
5.2 |
5.8 |
6.3 |
6.9 |
7.5 |
8.0 |
8.6 |
9.2 |
9.7 |
10.3 |
10.9 |
11.4 |
| 600 |
2.3 |
2.6 |
2.9 |
3.2 |
3.7 |
4.3 |
4.9 |
5.5 |
6.0 |
6.6 |
7.2 |
7.8 |
8.3 |
8.9 |
9.5 |
10.1 |
10.6 |
11.2 |
11.8 |
| 650 |
2.5 |
2.8 |
3.1 |
3.4 |
4.0 |
4.6 |
5.1 |
5.7 |
6.3 |
6.9 |
7.5 |
8.1 |
8.6 |
9.2 |
9.8 |
10.4 |
11.0 |
11.6 |
12.1 |
| 700 |
2.7 |
3.0 |
3.3 |
3.6 |
4.2 |
4.8 |
5.4 |
6.0 |
6.6 |
7.2 |
7.8 |
8.4 |
8.9 |
9.5 |
10.1 |
10.7 |
11.3 |
11.9 |
12.5 |
| 750 |
2.9 |
3.2 |
3.5 |
3.8 |
4.4 |
5.0 |
5.6 |
6.2 |
6.8 |
7.4 |
8.0 |
8.6 |
9.2 |
9.8 |
10.4 |
11.1 |
11.7 |
12.3 |
12.9 |
| 800 |
3.2 |
3.5 |
3.8 |
4.1 |
4.7 |
5.3 |
5.9 |
6.5 |
7.1 |
7.7 |
8.3 |
8.9 |
9.6 |
10.2 |
10.8 |
11.4 |
12.0 |
12.6 |
13.2 |
| 850 |
3.4 |
3.7 |
4.0 |
4.3 |
4.9 |
5.5 |
6.2 |
6.8 |
7.4 |
8.0 |
8.6 |
9.2 |
9.9 |
10.5 |
11.1 |
11.7 |
12.3 |
12.9 |
13.6 |
| 900 |
3.6 |
3.9 |
4.2 |
4.5 |
5.2 |
5.8 |
6.4 |
7.0 |
7.7 |
8.3 |
8.9 |
9.5 |
10.2 |
10.8 |
11.4 |
12.0 |
12.7 |
13.3 |
13.9 |
| 950 |
3.8 |
4.1 |
4.4 |
4.8 |
5.4 |
6.0 |
6.7 |
7.3 |
7.9 |
8.6 |
9.2 |
9.8 |
10.5 |
11.1 |
11.7 |
12.4 |
13.0 |
13.6 |
14.3 |
| 1000 |
4.0 |
4.3 |
4.7 |
5.0 |
5.6 |
6.3 |
6.9 |
7.6 |
8.2 |
8.8 |
9.5 |
10.1 |
10.8 |
11.4 |
12.1 |
12.7 |
13.4 |
14.0 |
14.6 |
| 1100 |
4.5 |
4.8 |
5.1 |
5.4 |
6.1 |
6.8 |
7.4 |
8.1 |
8.8 |
9.4 |
10.1 |
10.7 |
11.4 |
12.1 |
12.7 |
13.4 |
14.0 |
14.7 |
15.4 |
| 1200 |
4.9 |
5.2 |
5.6 |
5.9 |
6.6 |
7.3 |
7.9 |
8.6 |
9.3 |
10.0 |
10.6 |
11.3 |
12.0 |
12.7 |
13.4 |
14.0 |
14.7 |
15.4 |
16.1 |
| 1300 |
5.3 |
5.7 |
6.0 |
6.4 |
7.1 |
7.8 |
8.4 |
9.1 |
9.8 |
10.5 |
11.2 |
11.9 |
12.6 |
13.3 |
14.0 |
14.7 |
15.4 |
16.1 |
16.8 |
| 1400 |
5.8 |
6.1 |
6.5 |
6.8 |
7.5 |
8.2 |
9.0 |
9.7 |
10.4 |
11.1 |
11.8 |
12.5 |
13.2 |
13.9 |
14.6 |
15.4 |
16.1 |
16.8 |
17.5 |
| 1500 |
6.2 |
6.6 |
6.9 |
7.3 |
8.0 |
8.7 |
9.5 |
10.2 |
10.9 |
11.7 |
12.4 |
13.1 |
13.8 |
14.6 |
15.3 |
16.0 |
16.8 |
17.5 |
18.2 |
| 1600 |
6.6 |
7.0 |
7.4 |
7.7 |
8.5 |
9.2 |
10.0 |
10.7 |
11.5 |
12.2 |
13.0 |
13.7 |
14.5 |
15.2 |
15.9 |
16.7 |
17.4 |
18.2 |
18.9 |
| 1700 |
7.1 |
7.4 |
7.8 |
8.2 |
9.0 |
9.7 |
10.5 |
11.3 |
12.0 |
12.8 |
13.5 |
14.3 |
15.1 |
15.8 |
16.6 |
17.3 |
18.1 |
18.9 |
19.6 |
| 1800 |
7.5 |
7.9 |
8.3 |
8.7 |
9.4 |
10.2 |
11.0 |
11.8 |
12.6 |
13.3 |
14.1 |
14.9 |
15.7 |
16.5 |
17.2 |
18.0 |
18.8 |
19.6 |
20.3 |
| 1900 |
7.9 |
8.3 |
8.7 |
9.1 |
9.9 |
10.7 |
11.5 |
12.3 |
13.1 |
13.9 |
14.7 |
15.5 |
16.3 |
17.1 |
17.9 |
18.7 |
19.5 |
20.3 |
21.1 |
| 2000 |
8.4 |
8.8 |
9.2 |
9.6 |
10.4 |
11.2 |
12.0 |
12.8 |
13.6 |
14.5 |
15.3 |
16.1 |
16.9 |
17.7 |
18.5 |
19.3 |
20.2 |
21.0 |
21.8 |
| 2200 |
9.2 |
9.7 |
10.1 |
10.5 |
11.3 |
12.2 |
13.0 |
13.9 |
14.7 |
15.6 |
16.4 |
17.3 |
18.1 |
19.0 |
19.8 |
20.7 |
21.5 |
22.4 |
23.2 |
| 2400 |
10.1 |
10.5 |
11.0 |
11.4 |
12.3 |
13.2 |
14.1 |
14.9 |
15.8 |
16.7 |
17.6 |
18.5 |
19.3 |
20.2 |
21.1 |
22.0 |
22.9 |
23.8 |
24.6 |
| 2600 |
11.0 |
11.4 |
11.9 |
12.3 |
13.2 |
14.2 |
15.1 |
16.0 |
16.9 |
17.8 |
18.7 |
19.7 |
20.6 |
21.5 |
22.4 |
23.3 |
24.2 |
25.1 |
26.1 |
| 2800 |
11.8 |
12.3 |
12.8 |
13.3 |
14.2 |
15.2 |
16.1 |
17.0 |
18.0 |
18.9 |
19.9 |
20.8 |
21.8 |
22.7 |
23.7 |
24.6 |
25.6 |
26.5 |
27.5 |
| 3000 |
12.7 |
13.2 |
13.7 |
14.2 |
15.2 |
16.1 |
17.1 |
18.1 |
19.1 |
20.1 |
21.1 |
22.0 |
23.0 |
24.0 |
25.0 |
26.0 |
27.0 |
27.9 |
28.9 |
| 3200 |
13.6 |
14.1 |
14.6 |
15.1 |
16.1 |
17.1 |
18.1 |
19.2 |
20.2 |
21.2 |
22.2 |
23.2 |
24.2 |
25.3 |
26.3 |
27.3 |
28.3 |
29.3 |
30.3 |
| 3400 |
14.4 |
15.0 |
15.5 |
16.0 |
17.1 |
18.1 |
19.2 |
20.2 |
21.3 |
22.3 |
23.4 |
24.4 |
25.5 |
26.5 |
27.6 |
28.6 |
29.7 |
30.7 |
31.8 |
| 3600 |
15.3 |
15.8 |
16.4 |
16.9 |
18.0 |
19.1 |
20.2 |
21.3 |
22.4 |
23.4 |
24.5 |
25.6 |
26.7 |
27.8 |
28.9 |
29.9 |
31.0 |
32.1 |
33.2 |
| 3800 |
16.2 |
16.7 |
17.3 |
17.8 |
19.0 |
20.1 |
21.2 |
22.3 |
23.4 |
24.6 |
25.7 |
26.8 |
27.9 |
29.0 |
30.2 |
31.3 |
32.4 |
33.5 |
34.6 |
| 4000 |
17.0 |
17.6 |
18.2 |
18.8 |
19.9 |
21.1 |
22.2 |
23.4 |
24.5 |
25.7 |
26.8 |
28.0 |
29.1 |
30.3 |
31.4 |
32.6 |
33.8 |
34.9 |
36.1 |
| 4200 |
17.9 |
18.5 |
19.1 |
19.7 |
20.9 |
22.1 |
23.2 |
24.4 |
25.6 |
26.8 |
28.0 |
29.2 |
30.4 |
31.5 |
32.7 |
33.9 |
35.1 |
36.3 |
37.5 |
| 4400 |
18.8 |
19.4 |
20.0 |
20.6 |
21.8 |
23.0 |
24.3 |
25.5 |
26.7 |
27.9 |
29.1 |
30.4 |
31.6 |
32.8 |
34.0 |
35.2 |
36.5 |
37.7 |
38.9 |
| 4600 |
19.6 |
20.3 |
20.9 |
21.5 |
22.8 |
24.0 |
25.3 |
26.5 |
27.8 |
29.0 |
30.3 |
31.6 |
32.8 |
34.1 |
35.3 |
36.6 |
37.8 |
39.1 |
40.3 |
| 4800 |
20.5 |
21.1 |
21.8 |
22.4 |
23.7 |
25.0 |
26.3 |
27.6 |
28.9 |
30.2 |
31.5 |
32.7 |
34.0 |
35.3 |
36.6 |
37.9 |
39.2 |
40.5 |
41.8 |
| 5000 |
21.4 |
22.0 |
22.7 |
23.4 |
24.7 |
26.0 |
27.3 |
28.6 |
30.0 |
31.3 |
32.6 |
33.9 |
35.3 |
36.6 |
37.9 |
39.2 |
40.6 |
41.9 |
43.2 |
| 5200 |
22.2 |
22.9 |
23.6 |
24.3 |
25.6 |
27.0 |
28.3 |
29.7 |
31.1 |
32.4 |
33.8 |
35.1 |
36.5 |
37.8 |
39.2 |
40.6 |
41.9 |
43.3 |
44.6 |
| 5400 |
23.1 |
23.8 |
24.5 |
25.2 |
26.6 |
28.0 |
29.4 |
30.8 |
32.1 |
33.5 |
34.9 |
36.3 |
37.7 |
39.1 |
40.5 |
41.9 |
43.3 |
44.7 |
46.1 |
| 5600 |
24.0 |
24.7 |
25.4 |
26.1 |
27.5 |
29.0 |
30.4 |
31.8 |
33.2 |
34.7 |
36.1 |
37.5 |
38.9 |
40.4 |
41.8 |
43.2 |
44.6 |
46.1 |
47.5 |
Dark shading reflects maximum cost-share of $200.00 per acre at 65 percent of
$13.00 per hour = 23.67 hours per acre.
If you have any questions regarding this technical note, please contact one of the following:
Robert Logar,
State Forester
Phone: (406) 587-6836
Email: Robert.Logar
Ronald Nadwornick,
State Resource Conservationist
Phone: (406) 587-6998
Email: Ronald.Nadwornick
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Last Modified:
08/20/2008
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