7. Pierre Crosson, 'Future Supplies of Land and Water for World Agriculture,' Chapter 6 in Nurul Islam, ed., Poppulation and Food in the Early Twenty-First Century: Meeeting Future Food Demand of an Increasing Population, Washington, D. C.: International Food Policy Research Institute, pp. 154-156.
8. L. Oldeman, R. Hakkeling, and W. Sombroeck, World Map of the Status of Human- Induced Soil Degradation: An Explanatory Note, seconded., Wageningen, The Netherland; Nailobi: International Soil Referance and Information Center and United Nations Environment Programme, 1991.
9. World Bank and UNDP, Irrigation and Drainage Research A Proposal, Washington, D. C.: World Bank, 1990; P. A. Gram and Behjat Hojjati, "The Growth Potential of Existing Agricultural Technology," Chapter 7 of Nurul Islam, ed., Population and Food in the Early Twenty-First Century: Meeeting Future Food Demand of an Increasing Population, Washington, D. C.: International Food Policy Research Institute, pp.167-189, 1995.
10. P. Crosson, op. cit.
11. 5. Postel, Last Oasis: Facing Water Scarcity, The Worldwatch Environmental Alert Series, New York: W. W. Norton, 1992.
12. L. R. Brown, "Future Supplies of Land and Water Are Fast Approaching Depletion," Comment on Chapter 6 in Nurul Islam, ed., Population and Food in the Early Twenty-First Century: Meeeting Future Food Demand of an Increasing Population, Washington, D. C.: International Food Policy Rsearch Institute, pp. 161-166, 1995.
13. Donald Duvick, "Plant Breeding and Biotechnology for Meeting Future Food Needs," Chapter 9 in Population and Food in the Early Twenty-First Century: Meeeting Future Food Demand of an Increasing Population, Washington, D. C.: International Food Policy Rsearch Institute, p.222, 1995.
14. R. Evenson and C. David, "Rice Research and Productivity," Chapter 3 in Adiustroent and Techonology: The Case of Rice, Paris: OECD, pp. 57-84, 1990 ~3 J U~ Donald Plucknett, "Prospects of Meeting Future Food Needs Through New Technology," Chapter 8 in Population and Food in the Early Twenty-First Century: Meeeting Future Food
