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Soils of the lowland forests of West and Central Africa

Published online by Cambridge University Press:  05 December 2011

A. S. R. Juo  and
L. P. Wilding
A. S. R. Juo
Affiliation:
Texas A&M University
L. P. Wilding
Affiliation:
Texas A&M University
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Extract

The forest zone of West and Central Africa comprises the coastal and adjacent inland regions bounded the semi-deciduous forests in the west and the equatorial forests in central Africa and the Congo basin. Sedimentary plains, developed mostly on weathered sandy materials, lie along the coastal stretches and cover vast areas of the Congo basin. Behind the coast the plain rises gradually to hills and plateaus of much lower elevation than those of the highlands of East Africa. Two great rivers, the Niger and the Congo, which discharge huge volumes of fresh water to the Atlantic Ocean, are major contributors to the hydrological cycles of the rain forests ecosystems of the Guinea–Congo Region. The Niger originates from the forested highlands of Guinea and discharges its waters into the Bight of Benin by way of a large delta in southern Nigeria. The Congo basin occupies an immense area of 750 000 km2, surrounded by Pre-Cambrian uplands. The alluvial floor of the saucer-shaped basin is flat, and marshes and swamps comprise a large proportion of the total area. The highlands and plateaus along the rim are low to the west and north and higher to the south. To the east, they merge with the mountains of the Great Rift Valley of East Africa (Gann & Duignan 1972; Hance 1975; Grove 1978; Hamilton 1989).

Type
Research Article
Information
Proceedings of the Royal Society of Edinburgh, Section B: Biological Sciences , Volume 104: Essays on the Ecology of the Guinea-Congo Rain Forest , 1996 , pp. 15 - 29
Copyright
Copyright © Royal Society of Edinburgh 1996

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References

Aduayi, E. A. 1984. Effect of long-term ammonium sulfate fertilization on the pH and elemental distribution in a Nigerian soil. Communications in Soil & Plant Analysis 15, 461–76.CrossRefGoogle Scholar
Ahn, P. M. 1970. West African soils. Oxford: Oxford University Press.Google Scholar
Bourke, G. 1987. Forest in Ivory Coast face extinction. New Scientist 114 (1564), 22.Google Scholar
Cahen, L. 1954. Geologie du Congo Beige. Liege, Belgium: H. Vaillant-Carmanne S. A.Google Scholar
CPCS (Commission de Pedologie et de Cartographic des Sols). 1967. Classification des sols. Grignon, France: CPCS, ENSA.Google Scholar
D'Hoore, J. 1959. La carte des sols d'Afrique au sud du Sahara. Pedologie, Gand 10, 191–204.Google Scholar
FAO, 1974. FAO/UNESCO Soil map of the world. Rome: Food and Agriculture Organization (FAO).Google Scholar
Fitzpatrick, E. A. 1980. Soils: their formation, classification and distribution. New York: Longman.Google Scholar
Folster, H. 1969. Slope development in south-west Nigeria during later Pleistocene and Holocene. Gottinger Bodenkundliche Berichte 10, 3–56.Google Scholar
Forbes, T. 1975. A West African climosequence and some aspects of food crop potential. M. S. Thesis. Cornell University, Ithaca, New York and International Institute of Tropical Agriculture, Ibadan, Nigeria.Google Scholar
Friessen, D. K., Juo, A. S. R. & Miller, M. H. 1981. Residual effects of lime and leaching of calcium in a kaolinitic Ultisol in the high rainfall tropics. Soil Science Society of America Journal 46, 1184–89.CrossRefGoogle Scholar
Furon, R. 1965. Geology of Africa. New York: Hafner Publishing Co.Google Scholar
Fournier, F. 1963. The soils of Africa. In: UNESCO, a review of the natural resources of the African continent, pp. 221–48. New York: Colombia University Press.Google Scholar
Gallez, A., Juo, A. S. R., Herbillon, A. J. & Moormann, F. R. 1975. Clay mineralogy of selected soils in southern Nigeria. Proceedings of Soil Science Society of America 39, 577–85.CrossRefGoogle Scholar
Gann, L. H. & Duignan, P. 1972. Africa: the land and the people. San Francisco, California: Chandler Publishing Co.Google Scholar
Golley, F. B. (Ed.) 1983. Tropical rainforest ecosystems. Amsterdam: Elsevier Science Publishers.Google Scholar
Greenland, D. J. (Ed.) 1981. Characterization of soils in the humid tropics. Oxford: Clarendon Press.Google Scholar
Grove, A. T. 1978. Africa: south of the Sahara. (3rd edn). Oxford: Oxford University Press.Google Scholar
Hamilton, A. 1989. African forests. In Lieth, H. & Werger, M. J. A. (Eds). Tropical rain forest ecosystems: biogeographical and ecological studies, pp. 155–82. Amsterdam: Elsevier.Google Scholar
Hance, W. A. 1975. The geography of modern Africa. New York: Columbia University Press.Google Scholar
Harrison, P. 1987. Trees for Africa. New Scientist 114, (1560), 54–7.Google Scholar
Hughes, J. C. 1981. Mineralogy. In Greenland, D. J. (Ed.) Characterization of soils in the humid tropics, pp. 30–51. Oxford: Clarendon.Google Scholar
ILCA (International Livestock Center for Africa). 1984. Livestock development in sub-Saharan Africa. Boulder, Colorado: Westview Press.Google Scholar
Jansen, D. H. 1988. Tropical ecological and biocultural restoration. Science 239, 243–4.CrossRefGoogle Scholar
Jordan, C. 1985. Nutrient cycling in tropical forest ecosystems. Chichester: John Wiley.Google Scholar
Juo, A. S. R. & Lai, R. 1977. Effects of fallow and continuous cultivation on the chemical and physical properties of Alfisols in southwestern Nigeria. Plant and Soil 4, 567–84.CrossRefGoogle Scholar
Juo, A. S. R. & Fox, R. L. 1977. Phosphate sorption capacity of some bench mark soils in West Africa. Soil Science 124, 370–6.CrossRefGoogle Scholar
Juo, A. S. R. & Kang, B. T. 1989. Nutrient effect of modification of shifting cultivation in West Africa. In Proctor, J. (Ed.) Mineral nutrients in tropical forest and savanna ecosystems, pp. 289–300. London: Blackwell Scientific Publications.Google Scholar
Juo, A. S. R. 1989. New farming systems in the wetter tropics. Experimental Agriculture (Cambridge) 25, 145–63.CrossRefGoogle Scholar
Kang, B. T. & Juo, A. S. R. 1986. Effects of forest clearing on soil properties and crop performance. In Lal, R., Sanchez, P. A. &. Cummings, R. W. Jr. (Eds) Land clearing and development in the tropics, pp. 383–94. Rotterdam: A. A. Balkema.Google Scholar
Kang, B. T., Wilson, G. F. & Lawson, T. L. 1985. Alley cropping: a stable alternative to shifting cultivation. Ibadan, Nigeria: International Institute of Tropical Agriculture.Google Scholar
Lal, R. 1984. Soil erosion from tropical arable land and its control. Advances in Agronomy 37, 183–240.CrossRefGoogle Scholar
Lal, R., Sanchez, P. A. & Cummings, R. W. Jr. (Eds) 1986. Land clearing and development in the tropics. Rotterdam: A. A. Balkema.Google Scholar
Lawton, R. M. 1989. The exploitation of the African rain forest and man's impact. In Lieth, H. & Werger, M. J. A. (Eds) Tropical rain forest ecosystems: biogeographical and ecological studies, pp. 581–9. Amsterdam: Elsevier.CrossRefGoogle Scholar
Mannet, J. L. 1982. Nutritional limits to animal production from tropical pastures. In: Problems of animal production from tropical pastures. Slough, England: Commonwealth Agriculture Bureau.Google Scholar
Marten, G. G. 1986. Traditional agriculture in Southeast Asia: a human ecology perspective. Boulder, Colorado: Westview Press.Google Scholar
Michon, F. 1985. De l'homme de la forest au paysan de l'arbre – Agroforesteries Indonnesianne. Ph.D. Thesis, University of Sciences et Techniques du Languedoc, France.Google Scholar
Moormann, F. R., Lal, R. & Juo, A. S. R. 1976. Soils of the International Institute of Tropical Agriculture (IITA). Technical Bulletin No. 3, IITA, Ibadan, Nigeria.Google Scholar
Moormann, F. R. 1981. Representative toposequences of soils in southern Nigeria and their pedology. In Greenland, D. J. (Ed.) Characterization of soils in the humid tropics, pp. 10–30. Oxford: Clarendon Press.Google Scholar
Moran, E. F. (Ed.). 1983. The dilemma of Amazonian Development. Colorado: Westview Press, Boulder.Google Scholar
Nicholaides, J. J., Sanchez, P. A., Pandy, D. E., Villachica, J. H., Coutu, A. J. & Valverde, C. S. 1983. Crop production systems in the Amazon Basin. In Moran, E. F. (Ed.) The dilemma of Amazonian development. Boulder, Colorado: Westview Press.Google Scholar
Ojanuga, A. G. 1978. Genesis of soils in the metamorphic, forest region of southwestern Nigeria. Pedologie 28, 105–17.Google Scholar
Prance, G. T. 1986. Tropical rain forest and world atmosphere. American Association for the Advancement of Science Symposium 101. Boulder, Co: Westview Press.Google Scholar
Proctor, J. (Ed.) 1989. Mineral nutrients in tropical forest and savanna ecosystems. Special Publication No. 9, British Ecological Society. London: Blackwell Scientific Publications.Google Scholar
Roose, E. J. & Lelong, F. 1976. La facteurs de l'erosion hydrique en Afrique tropicale. Revue de Geographie Physique et de Geologie Dynamique 18, 365–74.Google Scholar
Slansky, M. 1962. Contribution a l'etude geologique du bassin sedimentaire cotier du Dahomey et du Togo. Memoire du Bureau de Recherche Geologie et Minieres 2, 1–270.Google Scholar
Smyth, A. J. & Montgomery, R. 1962. Soil and land use in central Western Nigeria. Ibadan, Nigeria: Government Printer.Google Scholar
Staff, Soil Survey, 1992. Keys to Soil Taxonomy (5th Edn). USDA/SMSS Technical Monograph 19. Blacksburg, Virginia: Pochontas Press.Google Scholar
Sombroek, W. G. & Zonneveld, I. S. 1971. Ancient dune field and fluviatile deposits in the Rima–Sokoto River Basin, Nigeria. Soil Survey Papers 5. Wageningen, The Netherlands: Soil Survey Institute.Google Scholar
Sys, C., Van Wambeke, A., Frankart, R., Gilson, P., Jongen, P., Pecrot, A., Berce, J. M. & Jamagne, N. 1961. La cartographie des sols au Congo. Publ. INEAC, Ser. Techn., No. 66.Google Scholar
Sys, C. 1970. Les sols de la region de Fiwa (Ubangi R. D. Congo). Possibilite d'implanter la culture de la canne a sucre. Bruxelles: Office de la Cooperation au Development, Ministere des Affaires Etrangere.Google Scholar
Tate, R. L. 1987. Soil organic matter: Biological and ecological effects. New York: John Wiley & Sons.Google Scholar
Theng, B. K. G. (Ed.) 1980. Soils with variable charge. Lower Hutt, NZ: New Zealand Society of Soil Science.Google Scholar
Thomas, M. F. 1965. An approach to some problems of land-form analysis in tropical environments. In Miller, Austin (Ed.) Essays in geography. Reading, England: University of Reading.Google Scholar
Thomas, M. F. 1974. Tropical geomorphology. London: Macmillan.Google Scholar
USDA, 1975. Soil Taxonomy: a basic system of soil classification for making and interpreting soil surveys. Agriculture Handbook No. 436. Washington DC: Soil Conservation Services, United States Department of Agriculture.Google Scholar
Van Wambeke, A. & Van Oosten, M. 1956. Carte des sols et de la vegetation du Congo, du Rwanda et du Burundi. Livraison 8, Vallee de la Lufira. Bruxelles: Publication INEAC.Google Scholar
Van Wambeke, A., Eswaran, H., Herbillion, A. J. & Comera, J. 1983. Oxisols. In Wilding, L. P., Smeck, N.E. & Hall, G. F. (Eds), Pedogenesis and Soil Taxonomy. II. The Soil Orders, pp. 325–55. Development in Soil Science IIB. Amsterdam: Elsevier Scientific Publications.CrossRefGoogle Scholar
Wiersum, K. F. 1983. Tree gardening and taungya in Java: example of agroforestry techniques in the humid tropics. Agroforestry Systems 1, 53–70.CrossRefGoogle Scholar