Agriculture Reference
In-Depth Information
Table 4.3
Economic inputs and returns by dudukuhan type (Budidarsono et al. 2004)
Management system
Mixed
timber
system
Mixed fruit-
timber-annual
crops-banana
system
Mixed fruit-
timber system
Fallow
system
All
No. of plot
16
55
129
8
208
Total area (ha)
4.32
13.67
34.5
0.43
52.92
Average area per plot (ha)
0.377
0.263
0.312
0.054
0.251
Tradable inputs
1. External inputs
1.1. Chemical fertilizer
• Plot applying chemical fertil-
izer (%)
0.7
0.7
1.4
• Average chemical fertilizer
application (kg ha
−1
)
43.8
16.2
30.0
1.2. Organic fertilizer
• Plot applying organic fertilizer
(%)
0.3
1.9
1.0
3.1
• Average organic fertilizer
application (kg ha
−1
)
714.5
2,009
3,137
1,953.3
1.3. Pesticide
• Plot applying pesticide (%)
4.9
1.3
6.2
2. Labor inputs
2.1. Planting
• Plot with planting activity (%)
0.3
0.7
2.1
3.1
• Total labor (ps-day/ha)
4
9
9
22
2.2. Tree and crop maintaining
• Plot with tree and crop
maintaining activity (%)
0.7
3.3
11.1
15.1
• Total labor (ps-day/ha)
19
58
18
95
2.3. Harvesting
• Plot with harvesting activity (%) 1.4
11.6
22.9
35.9
• Total labor (ps-day/ha)
4
14
12
30
Returns (Rp 000)
Fruits (Rp/ha)
18,564
28,581
47,144
Timber (Rp/ha)
3,211
7,173
11,021
21,405
Annual crops (Rp/ha)
382
4,524
4,906
Sum
3,593
30,260
39,602
73,454
Net Returns (Rp 000)
Total
3,241
28,116
35,148
66,505
Average per plot
954
1,076
655
2,684
Average per hectare
2,223
4,161
2,049
8,432
Tree species diversity (H'= 1.31 to 0.44) in dudukuhan systems is lower than the
tree species diversity in nearby Gunung Halimun National Park (H' = 4.05; Suzuki
et al. 1997) which is located in the upstream area of Nanggung at elevations of
1,000-1,800 m a.s.l. The natural forest in the national park is a climax ecosystem;
dudukuhan systems still experience dynamic change in tree species composition
and tree number as a result of farmer-controlled harvesting and enrichment planting.
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