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This study uses geo-spatial crop modeling to quantify the biophysical impact of weather extremes. More specifically, the study analyzes the weather extreme which affected maize production in the USA in 2012; it also estimates the effect of a similar weather extreme in 2050, using future climate s...


Chung, U.Gbegbelegbe, SikaShiferaw, BekeleRobertson, Richard D.Yun JITesfaye Fantaye, KindieHoogenboom, GerritSonder, Kai[Modeling the effect of a heat wave on maize production in the USA and its implications on food security in the developing world]Modeling the effect of a heat wave on maize production in the USA and its implications on food security in the developing world

Purpose: The purpose of this study is to examine the biophysical and socioeconomic impacts of climate change on maize production and food security in sub-Saharan Africa (SSA) using adapted improved maize varieties and well-calibrated and validated bioeconomic models. Design/methodology/approach: ...


Tesfaye Fantaye, KindieGbegbelegbe, SikaCairns, Jill E.Shiferaw, BekelePrasanna, BoddupalliSonder, KaiBoote, Kenneth J.Makumbi, DanRobertson, Richard D.[Maize systems under climate change in sub-Saharan Africa: Potential impacts on production and food security]Maize systems under climate change in sub-Saharan Africa: Potential impacts on production and food security

The world population is projected to increase to 9–10 billion by 2050, during which time it will be necessary to reduce anthropogenic greenhouse gas emissions to mitigate climate change. The particular challenge this places on agriculture is to identify practices which ensure stable and productiv...


Bellarby, J.Stirling, Clare M.Vetter, Sylvia H.Kassie, MenaleKanampiu FSonder, KaiSmith, PeteHillier, Jonathan[Identifying secure and low carbon food production practices: a case study in Kenya and Ethiopia]Identifying secure and low carbon food production practices: a case study in Kenya and Ethiopia

The first part of this study evaluated contents of hydrolysable tannins (HT) and condensed tannins (CT) of 65 accessions of tagasaste. In the second part, the effects of harvesting stage and growing season on the contents of HT, CT and alkaloids in different plant parts of the widely grown tagasa...


Assefa, G.Sonder, KaiWink, M.Kijorad, C.Steinmuller, N.Peters, Kurt J.[Effect of variety and harvesting management on the concentration of tannins and alkaloids in tagasaste (Chamaecytisus palmensis)]Effect of variety and harvesting management on the concentration of tannins and alkaloids in tagasaste (Chamaecytisus palmensis)

Tagasaste (Chamaecytisus palmensis), a multipurpose fodder tree, is highly productive in the tropical highlands. The forage has high crude protein (CP) concentrations but is reported to have low intake by ruminants. This study investigated the effects of plant harvest stage and feeding management...


Assefa, G.Kijora, C.Kehaliew, A.Sonder, KaiPeters, Kurt J.[Effect of pre-feeding forage treatments, harvesting stage, and animal type on preference of tagasaste (Chamaecytisus palmensis)]Effect of pre-feeding forage treatments, harvesting stage, and animal type on preference of tagasaste (Chamaecytisus palmensis)

Plant breeding and improved management options have made remarkable progress in increasing crop yields during the past century. However, climate change projections suggest that large yield losses will be occurring in many regions, particularly within sub-Saharan Africa. The development of climate...


Cairns, Jill E.Sonder, KaiZaidi, P.H.Verhulst PNMahuku, George S.Babu, R.Nair SKDas, B.Govaerts, BramVinayan, M.T.Rashid ZNoor JJDevi, P.Vicente, F. sanPrasanna, Boddupalli[Maize production in a changing climate: Impacts, adaptation, and mitigation strategies]Maize production in a changing climate: Impacts, adaptation, and mitigation strategies

Agriculture is the mainstay of the country and also the major source of employment and income. About 85 percent of the population live in the rural areas and are primarily engaged in agriculture and related activities. Among the other agricultural sector, livestock production contributes about 30...


Bizuwork, A.Tadddesse, G.Sonder, KaiPeden, Donald G.Jobre, Y.[Comparative assessment of forage and livestock density in Tekeze River Basin]Comparative assessment of forage and livestock density in Tekeze River Basin

Cocoa occupies 6 million ha in coastal humid West Africa where 70% of world supply is grown, 90% on 2 million family farms, of 2 ha or less. Here, at least 16 million people mostly depend on cocoa but earn only $100/person/year from the crop. There is need to optimize the farming system, minimize...


Alabi, TunrayoSonder, KaiOduwole, O.Okafor, C.[A multicriteria GIS site selection for sustainable cocoa development in West Africa: a case study of Nigeria]A multicriteria GIS site selection for sustainable cocoa development in West Africa: a case study of Nigeria

Climate change is expected to impact global food supply and food security by affecting growing conditions for agricultural production. Process-based dynamic growth models are important tools to estimate crop yields based on minimum inputs of climate, soil, crop management, and crop cultivar param...


Gbegbelegbe, SikaCammarano, DavideAsseng, SentholdRobertson, R.Chung, U.Adam, M.Abdalla, O.Payne, T.Reynolds, Matthew P.Sonder, KaiShiferaw, B.Nelson, Gerald C.[Baseline simulation for global wheat production with CIMMYTmega-environment specific cultivars]Baseline simulation for global wheat production with CIMMYTmega-environment specific cultivars

Historical and recent aerial photograph and satellite images were analysed to study the change of land use/land cover and soil degradation in different agroecological zones of Nigeria and Benin. The sites were characterized by an expansion of farmland at the expense of forest and shrub, fallow an...


Junge, B.Alabi, T.Sonder, KaiMarcus, S.Abaidoo, R.C.Chikoye, D.Stahr, Karl[Use of remote sensing and GIS for improved natural resources management: case study from different agroecological zones of West Africa]Use of remote sensing and GIS for improved natural resources management: case study from different agroecological zones of West Africa

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