Sap Jernang is a kind of rattan forest (not wood) which is taken from the skin of the sap fruit for a particular purpose. The fruit is like a rattan fruit, small rounds gather like a fruit bark. Jernang is a vine on the surrounding trees.
this is needed by China, Thailand, Singapore, Hongkong where they need more than 400 tons of jatropha per year. Indonesia currently can export sap jernang only 27 tons per year and even some of the fruit search results from the jernang forest. the spread of jernang in Indonesia is in the forests of the island of Sumatra (Aceh, Jambi, inland Riau) and Kalimantann (Pontianak).
allegedly jernang only found in three countries in the world namely India, Malaysia and Indonesia, so sap jernang become very expensive. from 100 kg of jernang fruit obtained 3.5 kg sap jernang with price per kg currently reached 1, 2 million rupiah. The most expensive type is the jenang type of dragon's blood. now if you want to cultivate the jernang can be taken from the seeds jernang in the forest or directly from seeds jernang.
Currently the new cultivated in the area of North Aceh province, so the results jernang in Indonesia from the cultivation is still very small. that is, it is an opportunity for investment. As the current picture of 1 ha of crops can produce 35 to 38 million per year. This becomes an additional opportunity for farmers who want to cultivate it, 
