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Mignouna, Djana B.Abdoulaye, TahirouAlene, A.Manyong, Victor M.Dontsop Nguezet, Paul M.Ainembabazi, John H.Asiedu, Robert[A microeconometric analysis of household consumption expenditure determinants in yamgrowing areas of Nigeria and Ghana]A microeconometric analysis of household consumption expenditure determinants in yamgrowing areas of Nigeria and Ghana

Aighewi, B.A.Maroya, N.G.Asiedu, Robert[Seed yam production from minisetts: a training manual]Seed yam production from minisetts: a training manual

Scarcity and/or high cost of healthy seed yams are the greatest constraints in yam production in Nigeria and probably across the West African Yam belt. Scientists at the National Root Crops Research Umudike developed the yam minisett technique of seed yam production in 1982 but nearly three decad...


Ikeorgu, J.G.Mazza, M.A.Okonkwo, C.Kikuno, H.[Advances in seed yam propagation methods in Nigeria]Advances in seed yam propagation methods in Nigeria

Yam (Dioscoreaspp.) is a primary agricultural commodity and a traditional staple food over much of West and Central Africa, where it is highly profitable both for producers and traders especially when production and storage strategies are successful in securing the supply of urban markets through...


Goergen, Georg E.Dossou, R.Asiedu, RobertHanna, R.[Scale insects on yams in Benin: diversity, incidence and farmers' knowledge and perceptions]Scale insects on yams in Benin: diversity, incidence and farmers' knowledge and perceptions

Cassava (Manihot esculenta Crantz) is the second most important food crop after rice, the staple in Sierra Leone; it is also the most important root and tuber crop. It is followed by sweet potato (Ipomoea batatas L.), yam (Dioscorea spp.), which forms part of the traditional farming system and ha...


Fomba, S.N.Massaquoi, F.B.Norman, P.E.Samura, A.E.Mansaray, A.Jalloh, A.Dixon, Alfred G.O.Anthony, N.A.Benya, M.T.Fornah, D.S.Sawi, M.K.Sartie, A.M.Onadipe, O.Sanni, L.O.[Current status of root and tuber crops improvement, production and utilization in Sierra Leone]Current status of root and tuber crops improvement, production and utilization in Sierra Leone

A range of physical means of manipulating yam tuber dormancy was tested, including the use of temperature, water, electric shock, microwave, heat and storage treatments. Most treatments had very little practical effect on tuber dormancy though differences in dormancy length between clones were de...


Barker, D.J.Keatinge, J.D.H.Asiedu, Robert[The potential of physical means for the manipulation of yam tuber dormancy]The potential of physical means for the manipulation of yam tuber dormancy

Six weight-classes of white guinea yam (Dioscòrea rotundata Poir.) setts—2–5, 5.01–10, 10.01–20, 20.01–30, 30.01–40, and 40.01–50 g—were presprouted in fresh, moist sawdust in open-air, propagation beds. The 2–5 g and 5.01–10 g classes were described as microsetts. Three natural groups patterned ...


Gyansa-Ameyyaw, C.E.Hahn, S.K.Álvarez, M.N.Doku, E.V.[Determination of optimum sett size for white guinea yam (Dioscorea rotundata Poir.) seed yam production: trends in sprouting in the presprout nursery and field performance]Determination of optimum sett size for white guinea yam (Dioscorea rotundata Poir.) seed yam production: trends in sprouting in the presprout nursery and field performance

Interview with Edwin Y. Sakyi, MOFA Ghana at YIIFSWA II Open Day at IITA Ibadan, Nigeria. YIIFSWA-II showcases High Ratio Propagation Technologies and demonstrates large scale production of early generation seed yam


International Institute of Tropical Agriculture[YIIFSWA II OPENDAY - Interview with Edwin Y. Sakyi]YIIFSWA II OPENDAY - Interview with Edwin Y. Sakyi

Interview and yam harvesting with Alhaji Adigun Atunnise, in Kishi, Oyo State, Nigeria. Going beyond exploring the potential of YIIFSWA-II improved varieties at Farmer's level.


International Institute of Tropical Agriculture[YIIFSWA II OPENDAY - interview with Alhaji Adigun Atunnise]YIIFSWA II OPENDAY - interview with Alhaji Adigun Atunnise

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