multipurpose tree species research for small farms: strategies ... - part

Table 3. General properties of P.falcotaria.
Properties
Tree height
Increase in dbh
G:,owth increment
Specific gravity
Strength class
Durability class
Wood color
Fiber length
Wood shrinkage
Remarks
7m (at 1-2 years)
13-18m (at 3 years)
21m (at 4 years)
30m (at 9-10 years)
45m (maximum height)
5-7cm/year
25-40m 3 /yr/ha
average ,.33
IV - V
IV -V
Source: National Academy of Sciences (1979) and Sutigno (1987).
farming or self sufficiency system. As a result, the
farmers seldom take the cost of labor into account
in determining the cost of production because
labor is generally supplied by the farm family itself,
except in the planting and harvesting stages.
Cost/Benefit Analysis
The rezults of a preliminary survey of several
farmers and craftsmen yield a variety of economic
details:
Farming
The calculation of production costs was based
on the following assumptions (US$1 = Rpl,770):
- the seedling/stump cost = Rp25 per stem; the
number of seedlings needed including
replacement of dead plants = 2,000 stems/ha;
205
white to pink
average 1.15mm with thin-walled fibers
radial direction: 2.5%
tangential direction: 5.2%
- the spacing of seedlings is 2x3m; they are
intercropped with food-producing plants in
agroforestry systems;
- wages for planting isbased on 8 man days of
labor per hectare;
- wages for harvysting (with an average
volume of 271 m/ha) is based on 67.75 man
days of labor/ha;
- the cost of maintaining and thinning is
compensated for by thinning yields;
- the average age of the harvested trees is7
years; and
- the Rural Loan Interest (RLI) rate is 15
percent/yr.