Barbier, E.B. 1997. The economic determinants of land degradation in developing countries. D. J. In Greenland, P. J. Gregory et P. H. Nye (eds.). Land resources: the edge of the Malthusian precipice. CAB International, Wallingford, and The Royal Society, London.
Bridges, E.M. et Catizzone, M. 1996. Soil science in a holistic framework. Geoderma, 71.
Donovan, G. et Casey, F. 1998. Soil fertility management in sub-Saharan Africa, World Bank Technical Paper No. 408, Washington, DC.
Douglas, M. 1993. Sustainable use of agricultural soils: issues et options. Centre for Environment and Development, Berne.
Dyson, T. 1996. Population and food: global trends and future prospects. London, Routledge.
Eschweiler, H. 1993. Draft physiographic map of Africa. FAO/AGLL Working paper, Rome.
Eswaran, H. et Beinroth, F.H. 1996. Land degradation: issues and challenges. Abstracts. International Land Degradation Conference, Adana, Turkey (10-14 June 1996) University of Cukurova, Department of Soil Science, Adana, Turkey.
Eswaran, H. et Dumanski, J. 1994. Land degradation and sustainable agriculture: global perspective. 8th International Conference of Soil Conservation, New Delhi.
FAO. 1979. A provisional methodology for soil degradation assessment. Rome.
FAO. 1982. Potential population supporting capacities of lands in the developing world, by G.M. Higgins, A.H. Kassam, L. Naiken, G. Fischer et M.M. Shah, Rome.
FAO. 1984. A provisional methodology for assessment and mapping of desertification. Rome.
FAO. 1986a. African agriculture: the next 25 years. Main report and annex II. Rome.
FAO. 1986b. The technology application gap: overcoming constraints to small farm development, by D.M. Sanchez. FAO Research and Technology Paper No. 1, Rome.
FAO. 1990. The conservation and rehabilitation of African lands: an international scheme. ARC/90/4. Rome.
FAO. 1992. Protect and produce (revised edition). Rome.
FAO. 1994a. Land degradation in South Asia, its severity, causes and effects upon the people. World Soil Resources Report No. 78. Rome.
FAO. 1994b. Soil crusting and sealing in agriculture, by W.B. Hoogmoed. Rome.
FAO. 1995a. Agriculture towards 2010. N. Alexandratos (ed.). Chichester, UK, John Wiley.
FAO. 1995b. Irrigation in Africa in figures. Water Report No. 7. Rome.
FAO. 1995c. Integrated plant nutrition systems. FAO Fertilizer and Plant Nutrition Bulletin No. 12. Rome.
FAO, 1996a. Agro-ecological zoning: guidelines. FAO Soils Bulletin No. 73. Rome.
FAO. 1996b. Land husbandry: components and strategy. FAO Soils Bulletin No. 70. Rome.
FAO. 1997. Land resources evaluation and the role of land-related indicators, by W.G. Sombroek, in Land quality indicators and their use in sustainable agriculture and rural development. Land and Water Bulletin No. 5. Rome.
FAO. 1998a. Soil fertility initiative for sub-Saharan Africa. Proceedings of the SFI/FAO Consultation. World Soil Resources Report No. 85. Rome.
FAO. 1998b. Production Yearbook. Vol. 52. Rome.
FAO. 1999a. Soil physical constraints to plant growth and crop production. By C.M.K. Gardner, K.B. Laryea and P.W. Unger. AGL/MISC/24/99. Rome.
FAO. 1999b. Soil fertility and African food security, by V. Kelly. World Soil Resources Report No. 85. Rome.
FAO. 1999c. Integrated soil management for sustainable agriculture and food security in Southern and East Africa, Proceedings of the Harare Expert Consultation, by H. Nabhan, M.A. Mashali and A.R. Mermut (eds.). AGL/MISC/23/99. Rome.
FAO. 2000a. Guidelines and reference material on integrated soil and nutrient management and conservation for farmer field schools. AGL/MISC/27/2000. Rome.
FAO. 2000b. Land resources potential and constraints at regional and country level. World Soil Resources Report No. 90. Rome.
FAOSTAT. 1998. FAO agricultural database. Rome.
Farrington, J. 1988. Farmer participatory research. Experimental Agriculture, 24.
Fisher G. et Heilig, G. 1997. Population momentum and the demand on land and water resources. In D. J. Greenland, P. J. Gregory and P. H. Nye (eds.). Land resources: on the edge of the Malthusian precipice. CAB International, Wallingford, and The Royal Society, London.
Fujisaka, S. 1989. A method for farmer-participatory research and technology transfer: upland soil conservation in the Philippines. Experimental Agriculture, 25.
Graham-Smith, F. (ed.). 1994. Population: the complex reality. The Royal Society, London.
Greenland, D.J. 1995. Long-term cropping experiments in developing countries: the need, the history, and future. In J.C. Waterlow, D.G. Armstrong, L. Fowden and R. Riley (eds.). Feeding the world population of more than eight billion people: a challenge to science. Oxford University Press, Oxford, UK.
Greenland, D.J. 1997. The sustainability of rice farming. CAB International, Wallingford, UK.
Harris, F.M.A. 1996. Intensification of agriculture in semi-arid areas: lessons from the Kano close-settled zone. IIED Gatekeeper series No. 59. International Institute for Environment and Development, London.
Hulme, M. 1994. Century-scale time series of regional rainfall anomalies in Africa. In T.A. Boden, D. P. Kaiser, R. J. Sepanski, et F. W. Stoss (eds.). Trends 93: a compendium of data on global change. Ornl-Cdiac, Oak Ridge, Tenn., USA.
IBSRAM. 1987. Tropical land clearing for sustainable agriculture. Proceedings, No. 3. Bangkok.
IBSRAM. 1989. Vertisol management in Africa. Proceedings, No. 9. Bangkok.
IITA. 1986. The wetlands and rice in sub-Saharan Africa. International Institute of Tropical Agriculture, Ibadan, Nigeria.
ISRIC. 1990. Human induced soil degradation. L.R. Oldeman, R.T.A. Hakkeling et W.G. Sombroek (eds.). Wageningen, the Netherlands.
ISRIC/UNEP/FAO. 1990. World map of the status of human-induced soil degradation, ISRIC, Wageningen, the Netherlands.
Jones, M.J. et Wild, A. 1975. Soils of the West African Savannah. Technical Communication No. 55. CAB International, Wallingford, UK.
Kang, B.T., Osiname, A.O. et Larbi, A. (eds) 1995. Alley farming research and development. IITA, Ibadan, Nigeria.
Kowal, J.M. et Kassam, A.H. 1978. Agricultural ecology of savannah: a study of West Africa. Oxford, UK, Clarendon Press.
Lal, R. 1989. Conservation tillage for sustainable agriculture. Advances in Agronomy, 42.
Mermut, A.R. et Eswaran, H. 1997. Opportunities for soil science in a milieu of reduced funds. Canadian J. Soil Science, 77.
Nachtergaele, F. 1999. Sources for global soil resources.
FAO/AGLL Working Paper, Rome.
Okigbo, B.N. et Greenland, D.J. 1976. Intercropping systems in tropical Africa. In R.I. Papendick, P.A. Sanchez et G.B. Triplett (eds.). Multiple Cropping. American Society of Agronomy, Special Publication No. 27, Madison, Wisconsin, USA.
Palm, C.A., Myers, R.J.K. et Nandwa, S.M. 1997. Combined use of organic and inorganic nutrient sources for soil fertility maintenance and replenishment. In R.J. Buresh, P.A. Sanchez, et F. Calhoun, (eds.). Replenishing Soil Fertility in Africa. Soil Science Society of America, Special Publication No. 51, Madison, Wisconsin, USA.
Penning de Vries, F.W.T. et Djitèye, M.A. 1982. La productivité des pâturages Sahéliens. Wageningen, the Netherlands, Pudoc.
Penning de Vries, F.W.T., Rabbinge, R. et Groot, J.J.R. 1998. Potential and attainable food production in different regions. In D. J. Greenland, P. J. Gregory, et P. H. Nye (eds.). Land resources: on the edge of the Malthusian precipice, CAB International, Wallingford, and The Royal Society, London.
Pieri, C.J.M.G. 1992. Fertility of soils: a future for farming in the West African Savannah. Berlin, Germany, Springer Verlag.
Pretty, J.N. 1995. Regenerating Agriculture: Policies and Practice for Sustainability and Self-Reliance. Earthscan, London; National Academy Press, Washington.
Pretty, J.N. 2000. Can sustainable agriculture feed Africa? Environ. Dev. and Sustainability 1.
Pretty, J.N., Thompson, J. et Kiara, J.K. 1995. Agricultural regeneration in Kenya: The Catchment Approach to soil and water conservation. Ambio XXIV (1).
Pretty, J.N. et Shah P. 1997. Making soil and water conservation sustainable: From coercion and control to partnerships and participation. Land Degradation and Development, 8.
Ruthenberg, H. 1985. Farming systems in the tropics. London, Oxford University Press.
Sanchez, P.A. 1976. Properties and management of soils in the tropics. New York, USA, Wiley Interscience.
Sanchez, P.A., Buresh, R.J. et Leakey, R.R.B. 1998. Trees, soils and food security. In D. J.Greenland, P. J. Gregory et P. H. Nye (eds.). Land resources: on the edge of the Malthusian precipice, CAB International, Wallingford, and The Royal Society, London.
Simpson, J.R., Okalebo, J.R., et Lubulwa, G. 1996. The problem of maintaining soil fertility in Eastern Kenya: a review of relevant research. Australian Centre for International Agricultural Research (ACIAR), Canberra.
Stoorvogel, J.J. et Smaling, E.M.A. 1990. Assessment of soil nutrition depletion in sub-Saharan Africa: 1983-2000. Report No. 28. Winand Staring Centre, Wageningen, the Netherlands.
Tiffen, M. Mortimore, M. et Gichuki, F. 1994. More people, less erosion. Chichester, UK, John Wiley.
Tropsoils, 1987. Technical Report for 1986/87. Department of Soil Science, North Carolina State University, Raleigh, North Carolina, UK.
UN. 1997. World Population Prospects. New York, USA, UN Publications.
UNEP/ISSS/ISRIC/FAO. 1995. Global and national soils and terrain digital databases (SOTER) procedures manual. World Soil Resources Report No. 74, FAO, Rome.
UNEP/FAO. 1997. World atlas of desertification. Second Edition. London, Arnold.
Van Reuler, H. et Prins, W.H. 1993. The role of plant nutrients for sustainable food crop production in sub-Saharan Africa. Leidschendam, the Netherlands, Vereiniging van Kunstmest Producenten.
Vlek, P.G., Khune, R.F. et Denich, M. 1998. Nutrient resources for crop production in the tropics. In D.J.Greenland, P.J. Gregory et P.H. Nye, (eds.). Land resources: on the edge of the Malthusian precipice. CAB International, Wallingford, and The Royal Society, London.
Wachter, D. et North, N. 1996. Land tenure and sustainable management of agricultural soils. Development and Environment Reports No. 15. Centre for Environment and Development, Berne.
World Bank. 1996. A concept paper and action plan for natural resource degradation in sub-Saharan Africa: restoration of soil fertility. Internal Report. Washington DC, USA, World Bank.
Young, A.M. 1997. Agroforestry for soil management. CAB International, Wallingford, UK.
Young, A. M. 1998. Land resources: now and future. Cambridge, UK, Cambridge University Press.
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