Hindustan Petroleum Corp Ltd (HPCL) plans to invest Rs4 billion to establish its own jatropha base over the next three years. The oil-bearing crop will be grown on 15,000 hectares of land in plantations in Chhattisgarh state. (U$1 = Rs42.2).   Jatropha is a highly rated non-food feedstock for biofuels. Under a deal with the…