Having
a management plan for a timber investment is important for several reasons.
First,
increasing
land values have meant increasing capital costs for existing as well
as new ownerships. Second, having a management plan provides continuity when
land is devised. And, because land always moves toward it's highest and best
use, the owner who fails to maximize his land's productivity risks losing
it in the long run.
Because change is inevitable and often unforeseen, the scope of a management
plan is usually limited to a 20 or 30-year horizon. A typical management
plan includes a map and legal description of the property; a summary of site
conditions; a summary of options tested with
growth-and-yield
modeling; a summary of modeling results; a description of the recommended
establishment methods; a schedule for thinning and harvest or, on larger
tracts, a timber
depletion
schedule; an estimate of the volume of wood obtained from thinning and harvest;
a schedule of estimated cash flows; and a statement of the
IRR
the plantation is expected to produce.
All recommendations regarding plantation establishment, number of trees per
acre, and thinning and harvest ages must be based on objective testing
and analysis, and the results of the analysis must be
reproducible. Subjective analysis and statements such as, "We feel this method
is best" are not acceptable.
The following tables are an example of the results of growth-and-yield modeling:
Title: Example Tract
No. of simulated growing seasons: 22
Random number seed: 68767
Site Index (base age 25): 80.0
Simulation size: 20 rows by 20 trees
Percent of trees inherently pulp quality: 16.0
PLANTING INFORMATION
--Machine Planted--
Distance (ratio) between rows: 12.0
Distance (ratio) between trees: 10.0
Maximum variance between rows: 10.0%
Maximum variance between trees: 10.0%
Trees planted per acre: 363.0
Establishment quality boost in years: 3
FERTILIZATION INFORMATION
--Not Fertilized--
HARDWOOD COMPETITION
Percent of total basal area: 4.8
OUTPUT INFORMATION
Juvenile stand output: NO
Thinning report output: YES
ASCII File: NO
Growing seasons completed before
requesting first management routine: 12
Volume units in cords and board feet, Doyle scale
|
| INPUTS |
|
|
|
PREDICTED |
|
|
| Site Index |
= 80.0 |
|
Dominant Height |
= 73.9 |
| Growing Seasons Completed |
= 22.0 |
|
Average DBH |
= 12.1 |
| Planted Trees |
= 363.0 |
|
Average Height |
= 82.6 |
| Percent Hardwood |
= 4.8 |
|
Average Crown Ratio |
= 35.6 |
DBH
Class |
Number
Trees |
Average
Height |
Basal
Area |
Total
Volume
O.B. |
Volume
Cords
To 4 in. |
Volume
Doyle
Bd. Ft. |
9 |
.9 |
69.6 |
.4 |
14.2 |
.1 |
.0 |
10 |
23.6 |
77.7 |
13.0 |
468.2 |
.0 |
1077.7 |
11 |
48.1 |
80.9 |
31.5 |
1176.2 |
.0 |
2996.1 |
12 |
30.9 |
83.2 |
24.1 |
924.8 |
.0 |
2608.2 |
13 |
26.3 |
84.6 |
24.2 |
845.4 |
.0 |
2930.2 |
14 |
19.1 |
87.0 |
20.4 |
818.1 |
.0 |
2788.0 |
15 |
13.6 |
85.6 |
16.6 |
653.7 |
.0 |
2365.3 |
16 |
1.8 |
89.7 |
2.5 |
104.6 |
.0 |
418.4 |
| Total |
164.3 |
|
132.8 |
5105.1 |
.1 |
15183.8 |
|