1. B. N. Mittra, S. S. Kolhe, and A. R. Sharma, 1986 : Energy harvesting and biomass utilization for land productivity in rice. Paper presented at the First Nat . Seminar on 'Low Energy Technologies for the Protection of the Environment and Ecology' held at R.E.C., Durgapur, India from 19 to 20 April, 1986.