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In Lake Zone, Tanzania, farmers were trained to multiply and distribute quality sweetpotato planting material. The objectives of this study were to assess changes in skills and practices among the trained farmers as vine multiplication became a specialized task. Nine months after the project ende...


McEwan, M.Lusheshanija, D.Shikuku, K.M.Sindi, K.[Specialised sweetpotato vine multiplication in Lake Zone, Tanzania: What “sticks” and what changes?.]Specialised sweetpotato vine multiplication in Lake Zone, Tanzania: What “sticks” and what changes?.

In Sub-Saharan Africa, sweetpotato pre-basic seed is multiplied in screenhouses using a sterilized soil substrate. This is expensive and unsustainable. The use of sand substrate with a fertigation system (“sandponics”), is an alternative. The study compared the cost-effectiveness for pre-basic se...


Makokha, P.Ssali, R.T.Rajendran, S.Wanjala, B.W.Matasyoh, L.G.Kiplagat, O.K.Low, J.W.McEwan, M.[Comparative analysis for producing sweetpotato pre-basic seed using sandponics and conventional systems.]Comparative analysis for producing sweetpotato pre-basic seed using sandponics and conventional systems.

Stathers, T.McEwan, M.Gibson, R.Mwanga, R.O.M.Carey, E.Namanda, S.Abidin, E.Low, J.W.Malinga, J.Agili, S.Andrade, M.I.Mkumbira, J.[Everything you ever wanted to know about sweetpotato: Reaching agents of change ToT manual. 3: Sweetpotato seed systems.]Everything you ever wanted to know about sweetpotato: Reaching agents of change ToT manual. 3: Sweetpotato seed systems.

Salasya, B.Ambitsi, N.Ndolo, P.McEwan, M.Oucho, P.Njarro, I.[A Baseline survey of Orange-fleshed sweetpotato in Western Kenya.]A Baseline survey of Orange-fleshed sweetpotato in Western Kenya.

This study examined the nutrition and food security impacts of a project that was designed to improve availability of disease-free planting materials of biofortified orange-fleshed sweetpotato (OFSP) in rural Tanzania. Difference-in-difference and matching techniques were employed to estimate cau...


Mashisia, K.Okello, J.J.Wambugu, S.Sindi, K.Low, J.W.McEwan, M.[Nutrition and food security impacts of quality seeds of biofortified orange-fleshed sweetpotato: Quasi-experimental evidence from Tanzania]Nutrition and food security impacts of quality seeds of biofortified orange-fleshed sweetpotato: Quasi-experimental evidence from Tanzania

We examined the effect of multidimensional farmers’ beliefs on the likelihood of cultivating planting materials of biofortified orange-fleshed sweetpotato (OFSP) varieties. Using a panel dataset and combining difference-in-differences regression with propensity score matching, results showed posi...


Shikuku, K.M.Okello, Julius JumaSindi, KirimiLow, J.W.McEwan, M.[Effect of Farmers’ Multidimensional Beliefs on Adoption of Biofortified Crops Evidence from Sweetpotato Farmers in Tanzania]Effect of Farmers’ Multidimensional Beliefs on Adoption of Biofortified Crops Evidence from Sweetpotato Farmers in Tanzania
Autor: McEwan, M.

One of the objectives of the SASHA project is to strengthen technical, financial and institutional capacities for the sustainable production of pre-basic sweetpotato seed in 11 sub-Saharan African countries. This flyer outlines the schematic of sweetpotato seed system and the progress made from J...


McEwan, M.[Tackling the pre-basic seed system bottleneck]Tackling the pre-basic seed system bottleneck

Stathers, T.McEwan, M.Gibson, R.Mwanga, R.O.M.Carey, E.E.Namanda, S.Low, J.W.Ogero, K.Rajendran, S.Abidin, P.E.Malinga, J.Agili, S.Andrade, M.I.Mkumbira; J.[Everything you ever wanted to know about sweetpotato, Topic 5: Sweetpotato seed systems]Everything you ever wanted to know about sweetpotato, Topic 5: Sweetpotato seed systems
Autor: McEwan, M.

This review assesses our current knowledge of sweetpotato seed systems in sub-Saharan Africa (SSA) as a contribution toward developing a conceptual framework for guiding practical interventions for root, tuber, and banana (RTB) seed systems. This is in the context of the CGIAR RTB program’s theme...


McEwan, M.[Sweetpotato seed systems in sub-saharan Africa: A literature review to contribute to the preparation of conceptual frameworks to guide practical interventions for root, tuber and banana seed systems.]Sweetpotato seed systems in sub-saharan Africa: A literature review to contribute to the preparation of conceptual frameworks to guide practical interventions for root, tuber and banana seed systems.

Smallholders in Eastern and Southern Africa (ESA) have limited access to timely availability of quality sweetpotato seed which contributes to sub-optimal root yields. To enhance availability and access to quality seed it is necessary to link formal plant breeding efforts to a sustainable seed sup...


Rajendran, S.Kimenye, L.N.McEwan, M.[Strategies for the development of the sweetpotato early generation seed sector in eastern and southern Africa]Strategies for the development of the sweetpotato early generation seed sector in eastern and southern Africa

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