Jatropha curcas an excellent source of renewable energy in the dry areas.
The seeds of this Euphorbiaceae tree contain more than 30 % oil, which can be used for making bio-diesel. The seed cake produced after oil expulsion is rich in nitrogen (> 5 %), phosphorus (>2.5% P2O5) and potassium (1% K2O) and can be converted into valuable organic manure for improving physical and chemical properties of the soil. The plant propagates freely from seeds as well as from cuttings and can start producing fruits in two to three years after establishment. It is well adapted to the harsh environments of desert margins, and can withstand drought once it is established through supplemental irrigation in the dry areas.
Take a look at what is happenining in Batan reseach centre....
http://www.batan.go.id/en2006/result_food.php
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