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Since its foundation in 1967, the International Institute of Tropical Agriculture (IITA) has worked, in partnership with national agricultural research systems in sub-Saharan Africa, on the improvement of cassava and dissemination of improved cassava germplasm. This paper describes the impact of ...


Bokanga, M.Makinde, K.Dixon, A.Whyte, J.Manyong, Victor M.[The contribution of IITA improved cassava to food security in subSaharan Africa: an impact study]The contribution of IITA improved cassava to food security in subSaharan Africa: an impact study

Speargrass [Imperata cylindrica (L.) Raeuschel] is a noxious weed widespread in most tropical zones of the world. Studies were conducted in the savannah of West Africa from 1997 to 1999 to evaluate crop yield, speargrass control, and net benefit from the use of cover crops integrated with handwee...


Chikoye, D.Manyong, Victor M.Carsky, R.Ekeleme, F.Gbehounou, G.Ahanchédé, A.[Response of speargrass (Imperata cylindrica) to cover crops integrated with handweeding and chemical control in maize and cassava]Response of speargrass (Imperata cylindrica) to cover crops integrated with handweeding and chemical control in maize and cassava

Using data from a survey of farm operators in two major ecological zones of Osun State in south-western Nigeria, this paper empirically evaluates the determinants of farmers' fertiliser adoption decisions and the intensity of use of the technology using a Tobit regression model. With a multi-stag...


Bamire, A.Fabiyi, Y.Manyong, Victor M.[Adoption pattern of fertiliser technology among farmers in the ecological zones of southwestern Nigeria: a Tobit analysis]Adoption pattern of fertiliser technology among farmers in the ecological zones of southwestern Nigeria: a Tobit analysis

One of the options to alleviate soil fertility constraints for sustainable agriculture in the savannas of West Africa is to develop soil nutrient management technologies from an adequate supply and feasible share of organic and mineral inputs. This paper makes a diagnosis of farm-level use of org...


Manyong, Victor M.Makinde, K.Sanginga, N.Vanlauwe, BernardDiels, J.[Fertilizer use and definition of farmer domains for impactoriented research in the northern Guinea savanna of Nigeria]Fertilizer use and definition of farmer domains for impactoriented research in the northern Guinea savanna of Nigeria

In an attempt to go beyond the so called “smart” subsidies, Nigeria has embarked on a potentially innovative mobile phone-based input subsidy program that provides fertilizer and improved seed subsidies through electronic vouchers. In this article, we examined the productivity and welfare effects...


Wossen, T.Abdoulaye, TahirouAlene, A.Feleke, S.Ricker-Gilbert, J.Manyong, Victor M.Awotide, B.A.[Productivity and welfare effects of Nigeria's e-voucher-based input subsidy program]Productivity and welfare effects of Nigeria's e-voucher-based input subsidy program

Résumé Facteurs socio-économiques et accès au crédit des petits producteurs de manioc dans le sud-ouest du Nigeria L'accès au crédit est un facteur important pour l'augmentation de la productivité agricole. Le modèle " Tobit" a été utilisé pour évaluer les facteurs qui influencent l'intensité de...


Awotide, B.A.Abdoulaye, TahirouAlene, A.Manyong, Victor M.[Socio-economic factors and smallholder cassava farmers' access to credit in south-western Nigeria]Socio-economic factors and smallholder cassava farmers' access to credit in south-western Nigeria

Striga hermonthica (del) Benth is threatening rural livelihoods in western Kenya where maize is the major food and cash crop. Vulnerability analysis was conducted on a sample of 802 households in eight districts of Nyanza and Western provinces. Farmers perceived Striga as the major cause of pover...


Manyong, Victor M.Alene, A.Odhiambo, G.D.Mignouna, H.D.Bokanga, M.Omanya, G.Nindi, S.J.[Livelihood strategies of resource poor farmers in strigainfested areas of western Kenya]Livelihood strategies of resource poor farmers in strigainfested areas of western Kenya

This paper determines the degree or extent of farmer’s risk aversion that affects sustainable maize production in Northern Nigeria. Using a ridge regression analysis, a measure of risk aversion was derived for each individual farmer in a model of safety-first behaviour from a cross-sectional surv...


Manyong, Victor M.Olarinde, L.[Risk aversion and sustainable maize production in Nigeria: some challenges and prospects for agricultural and economic development]Risk aversion and sustainable maize production in Nigeria: some challenges and prospects for agricultural and economic development
Alene, A.Manyong, Victor M.Abele, S.Sanogo, D.[Assessing the impact of agricultural research on rural livelihoods: achievements, gaps, and options]Assessing the impact of agricultural research on rural livelihoods: achievements, gaps, and options

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