@article {580,
	title = {IITA: Sustainable systems},
	journal = {African Farming},
	year = {1987},
	month = {Sept/Oct 1987},
	pages = {50-51},
	abstract = {Bede Nwoye Okigbo, Deputy Director General of International Institute of Tropical Agriculture (IITA) for the last ten years, is one of those rare human beings who has a rich professional life perfectly integrated with his own personality. Several societies and academies have enrolled his talents. His field of specialization is crop ecology and production, but it is hard to find any area of agriculture or botany where Okigbo{\textquoteright}s profound insight or experience in not equally valid. In this interview, Dr. Okigbo explains how research being carried out at IITA is helping Africa to feed itself.},
	keywords = {agricultural extension, agroforestry, alley cropping, barley, cassava, cereal food imports, cereals, cowpeas, farming systems research , food aid, green revolution, indigenous crops, maize, millet, plantains, rice, seed yam, seeds, soils, sorghum, strategic planning study, sustainable agriculture, wheat, yams},
	author = {Anonymous}
}
@book {384,
	title = {Shifting cultivation in Africa: The Zande system of agriculture},
	year = {1956},
	month = {1956},
	pages = {xxxi, 304 pp.},
	publisher = {Routledge \& Kegan Paul},
	organization = {Routledge \& Kegan Paul},
	address = {London, England},
	abstract = {The excerpts from this book talk about the Zande ecological conceptions concerning swidden farming, rock and stone formations. The second part of this excerpt looks at Zande Crops: millet, Maize, sorghum, rice, cowpeas, green gram. The excerpt finishes with a discussion of overcultivation.},
	keywords = {cowpeas, crop rotation, ecology, green gram, maize, millet, overcultivation, rice, rock formations, slash and burn, sorghum, swiddens, taxonomy, Zande},
	url = {https://ehrafworldcultures-beta.its.yale.edu/cultures/fo07/documents/060},
	author = {Pierre de Schlippe}
}
