Sub Unit of Distillation Tray
planting hole should be concaveto hold much water in the rainy season. In wet climate, the surface of the planting hole should be elevated or form gulud shaped
to avoid the puddles that can cause drainage and poor soil aeration. Back up seedling as much as 20 500 seedings should be prepared for replanting.
Pruning
Jatropha curcas is planted as a fence cropor estate crop which should be
pruned periodically for maximal branching. Pruning is carried out to increase the number of productive branches. More branches on jatropha will produce more
seeds. In order to increase the number of branches, pruning can be conducted in 25 days. Pruning is done by cutting the plant shoots as high as 20-30 cm from the
ground, leaving at least 2 leaves on the rest of the trunk. Pruning is done on the woody trunk grayish brown. On the cut trunk, new branches will grow and
should be maintained. The quantity and quality of bunches that will appear in each branch is influenced by the level of soil fertility. Thinning also needs to be done to
reduce the occurrence of competition among plants that can essentially be used as a source of seeds or stem cuttings. Pruning and thinning should be carried out
periodically. Data planting of Jatropha curcas in 6 ha in PT. Adaro-Tanjung Banjarmasin is as follows:
- Location
: S2 - Planting Year
: 2010 - Planting distance : 2 m x 2 m
- Variety : IP - 1P
- Number of plants : 3,438 trees - Fertilizer dose i.e. : 10 g of NPKtree during planting, and ½ kg of manuretree
In the process of plant preservation, in order to provide fertile land for good Jatropha curcas growth, some weeds should be planted also during hydro
seeding as shown in Figure 3.33. Figure 3.34 shows some pictures of Jatropha curcas
plants aged about 1.5 years in PT Adaro.