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Director Generals l98990 Report 4
lnland Valley Farming Systems 20
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adapted agncultural agricultural research agroecological zones agronomist alley cropping alley farming areas banana biological control Biological Control Program biotechnology black Sigatoka breeder breeding Cameroon cassava green mite cassava mealybug Center Central Africa clones collaboration coordinator Cote d'lvoire cowpea cultivars cultivation disease ecological environments evaluation fallow farmers farming systems food crops germplasm Ghana hedgerows hybrids IITA scientists IITA's improved varieties increased inland valleys insect Institute intercropping legumes llTA llTA research llTA's lmprovement lnternational lopezi lowland mealybug moist savanna national programs natural enemies Network Nigena Nigeria nitrogen on-farm parasitoid percent pests Ph.D plant plantain populations potential region released research programs research systems resistance Resource and Crop resource management rice Root Crops savanna seed soil fertility soybean species streak virus striga studies sustainable sweet potato techniques technologies testing training course tropical Africa tuber University of lbadan vaneties weed West Africa West and Central Yaninek yields Zaire