Jatropha curcas L. (Swahili: Mbono Kaburi) is a perennial crop that grows in regions around the equator. It grows bushes of up to 6 meters in height and can live up to 50 years. After about three year the first seeds can be harvested. Jatropha can grow in areas that are unsuitable for other plants, because they are too dry or too arid, or because they have been left by humans because of soil depletion after excessive agriculture. The plant requires little water, fertilizer or pesticides. Many parts of Jatropha plants have been used historically by local cultures. The oil from the seeds has applications as a medicine, a lubricant or as a fuel. In present days it is mainly known as a feedstock for soap production. Jatropha soap (Sabuni ya Mmbono) is said to have healing properties for those who suffer from acne.
Local advantages
As the Jatropha plant and seeds are toxic, they are not eaten by goats or other animals. This means that a hedge of Jatropha plants keeps the cattle outside the fields where food crops are grown. Furthermore Jatropha plants can provide shadow in harsh conditions, allowing more delicate crops to be grown in between. Good results have been reported using this so-called intercropping. Growing, harvesting and processing of Jatropha offers a lot of local labour. For this reason Diligent is working with local farmers and presses the seeds to oil in Tanzania. Another advantage is the useful application of the remaining press cake in local communities.
