Abstract
This study was conducted to firstly determine changes in extracted oil yield, soluble solid concentration and free fatty acids over time of harvested physiologically mature green Jatrophacurcas Linn Luanti accession fruits. Secondly, to understand identified fruit bunch harvesting indicators by examining the ripening percentage during storage based on the identified characters of fruits bunches at harvest. The results showed a significantly high oil yield extracted from off-tree fruits ripened and senesced kernels compared to kernels from on-tree ripened and senesced fruits. Extracted oil yield from off-tree ripened and senesced fruits were about 59 and 63% compared to only about 49 and 48% for on-tree ripened and senesced fruits respectively. Fruit bunches with less than 10% of their fruits yellow in color is recommended as the best harvesting indicator. The results of this study demonstrate promising harvesting and postharvest handling practices to increase commercialization viability of this non-edible biodiesel feedstock.
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