Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Records 1 - 13 / 13

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    Tropical forage technologies can deliver multiple benefits in Sub-Saharan Africa. A meta-analysis
    Paul, Birthe K. ; Koge, Jessica ; Maass, Brigitte L. ; Notenbaert, An ; Peters, Michael ; Groot, Jeroen C.J. ; Tittonell, Pablo - \ 2020
    Agronomy for Sustainable Development 40 (2020)4. - ISSN 1774-0746
    Crop-livestock systems - Cropping system - Forage agronomy - Forage grass - Herbaceous legume - Livestock productivity - Multi-dimensional impacts - Soil organic carbon - Sustainable intensification

    Scarcity of quantity and quality feed has been a key constraint to productivity of smallholder crop-livestock systems. Tropical forages include a variety of annual and perennial grasses, herbaceous and dual-purpose legumes, and multipurpose trees and shrubs. They have been promoted in Sub-Saharan Africa (SSA) for increasing livestock productivity and household income through higher quantity and quality of herbage, while contributing to soil improvement and higher food crop yields. For the first time, we quantitatively reviewed 72 experimental studies from across SSA to take stock of geographical distribution and forage technology focus of past research; quantify magnitudes of multidimensional impacts of forage technologies; and present variability in forage agronomy data. Improved forage technologies were classified into four groups: (i) germplasm, (ii) management, (iii) cropping system integration, and (iv) feeding regime. Mean weighted response ratios were calculated from 780 pairs of observations for 13 indicators across the five impact dimensions. Improved forage germplasm had on average 2.6 times higher herbage productivity than local controls, with strongest effect in grasses. Feeding regimes with improved leguminous forages increased milk yield by on average 39%, dry matter intake by 25%, and manure production by 24%. When forage technologies were integrated with food crops, soil loss was almost halved, soil organic carbon increased on average by 10%, and grain and stover yields by 60% and 33%, respectively. This study demonstrates the central role improved forages could play in sustainable intensification of crop-livestock systems in SSA. It highlights the need for multidisciplinary and systems-level approaches and studies to quantify synergies and tradeoffs between impact dimensions. Further research is needed to explain forage agronomic yield variability, unraveling interactions between genotype, on-farm environmental conditions, and management factors. Results from this review can inform development programs, prioritizing technologies proven successful for dissemination and indicating magnitudes of expected impacts.

    Piloting a fresh fruit and vegetables market to deliver high quality, safe food products : Reflections and lessons learned
    Gema, Joyce ; Koge, Jessica W. ; Keige, John ; Moreno-Echeverri, Indira ; Kipkoech-Kosgei, Carolyne ; Matsaba, Emmanuel ; Kilelu, Catherine ; Wesonga, John ; Koomen, Irene - \ 2020
    Wageningen : Wageningen Centre for Development Innovation (Report / Wageningen Centre for Development Innovation WCDI-20-117) - 49
    Meta-analysis of 3R Kenya findings about the transformation of the aquaculture, dairy and horticulture sectors : Recommendations to support the transition from aid to inclusive aid and trade
    Kessler, Jan Joost ; Coninx, Ingrid ; Kilelu, Catherine ; Vugt, Simone van; Koomen, Irene ; Bebe, Bockline ; Soma, Katrine ; Ndambi, Asaah ; Gema, Joyce ; Obwanga, Benson ; Rurangwa, Eugene ; Moreno Echeverri, Indira ; Beekman, Gonne ; Wangui Koge, Jessica ; Lee, Jan van der; Daburon, Annabelle ; Wesonga, John ; Ruben, Ruerd - \ 2020
    Wageningen : Wageningen Centre for Development Innovation (Report / Wageningen Centre for Development Innovation WCDI-20-116) - 63
    3R Kenya (Robust, Reliable and Resilient) - From aid to trade project, annual report 2019
    Koge, Jessica ; Kilelu, C.W. ; Vugt, S.M. van; Coninx, I. ; Koomen, I. ; Soma, K. ; Obwanga, Benson ; Gema, Joyce ; Omedo Bebe, Bockline - \ 2020
    Wageningen Centre for Development Innovation, Wageningen University & Research (WCDI-20-104 ) - 42 p.
    Climate-resilient horticulture for sustainable county development in Kenya
    Patrick, Esther M. ; Koge, Jessica ; Zwarts, Emiel ; Wesonga, John M. ; Atela, Joanes O. ; Tonui, Charles ; Kilelu, Catherine ; Goosen, Hasse ; Coninx, Ingrid ; Koomen, Irene - \ 2020
    Wageningen : Wageningen Centre for Development Innovation (Report / Wageningen Centre for Development Innovation WCDI-20-107) - 49
    Climate change presents one of the greatest challenges to the productivity and sustainable growth of the agricultural sector in Kenya due to extreme events such as droughts and floods as well as changes in temperature. Horticultural crops are particularly sensitive to climate change because of their high water demand and strict temperature requirements. Increased or decreased rainfall and increased temperature result in drought or flooding, lack of water for irrigation, and pests and diseases epidemic can affect the suitability of areas for growing horticultural crops. Understanding the impacts of climate for a given crop under specific conditions is key to supporting further development of the horticulture sector. While horticulture is a priority economic subsector in many counties, it is not known how the counties position themselves with regard to dealing with climate change threats in the sector. A review of the literature shows how climate change significantly affects the performance of horticultural crops across a variety of climatic zones and that counties need to be better prepared to address these effects. Horticulture covers myriad crops (including fruits and vegetables), which are affected by climate change in different ways. Seasonal patterns, both for temperature as well as (onset of) rainfall are changing. Temperature thresholds for specific crops are being exceeded, while some areas are now more favourable for growing certain crops where previously temperatures were too low. Suboptimal temperatures affect both the yield and quality of produce. The horticulture sector has also experienced incidences of pests, such as Tuta absoluta on tomato; climate change is a confounding factor to the spread and establishment of these pests. Agriculture which is highly affected by climate change is devolved to counties; as such, policies relevant to it are expected to be implemented at county level. An analysis of the County Integrated Development Plans showed that horticulture is a high-value subsector that plays a major role in generating revenue for county development. Most counties have prioritized horticulture and made substantial investments. Climate change is acknowledged as a threat to different sectors, but there is only scant analysis of the factors causing it, effects it will have and proposed responses to it. Farmers and crop officers from Kiambu and Kajiado counties are aware of climate change and its effects on horticulture. However, understanding of the relationship between cause and effect and of possible mitigating actions is weak. We observed that at all levels, in the field as well as at county level, preparedness for climate change is low and government support to the farmers is also limited. Due attention and informed decision-making based on, for example the Kenya Climate Atlas that is currently being developed, is required.
    Making milk quality assurance work on an unlevel playing field - Lessons from the Happy Cow pilot : 3R Kenya Project Practice Brief 013
    Kilelu, C.W. ; Ndambi, O.A. ; Lee, J. van der; Koge, Jessica ; Njiru, Ruth - \ 2019
    Wageningen University & Research - 8 p.
    Dairy, the motor for healthy growth : Report of workshop organized by Netherlands and East African dairy partners
    Koge, Jessica ; Hennemann, Ilse ; Mwaura, Andrew ; Goris, Wim ; Vugt, Simone van - \ 2019
    Wageningen : Wageningen Centre for Development Innovation (Report / Wageningen Centre for Development Innovation WCDI-19-077) - 25
    3R Kenya (Robust, Reliable and Resilient) - From aid to trade project : Annual report 2018
    Koge, Jessica ; Kilelu, Catherine ; Coninx, I. ; Vugt, S.M. van; Lee, J. van der; Koomen, I. ; Soma, K. ; Obwanga, Benson ; Gema, Joyce ; Omedo Bebe, Bockline - \ 2019
    Wageningen Centre for Development Innovation (WCDI-19-057 )
    Making milk quality assurance work on an unlevel playing field : Lessons from the Happy Cow pilot
    Ndambi, Asaah ; Kilelu, Catherine W. ; Lee, Jan van der; Njiru, Ruth ; Koge, Jessica - \ 2019
    Wageningen : Wageningen Livestock Research (Wageningen Livestock Research report 1165) - 72
    This report describes and assesses a milk quality assurance innovation, the milk quality tracking andtracing system (MQT&T) and Quality-Based Milk Payment System (QBMPS) project. The project was piloted by Happy Cow Ltd (HC), a medium-scale processor in Nakuru, Kenya, and its milk suppliers.The objective of the pilot project was to offer a proof of concept to track and trace milk quality within a smallholder-dominated supply chain and to develop and implement a payment system based on the quality of raw milk delivered. The assessment adapted the PPPLab Scaling Scan as the mainframework to enumerate the various project investments, interventions and achievements and toreflect on the success factors, shortcomings and preconditions required for QBMPS scalability.
    A comparative study on aquaculture sector development in Egypt, Ghana and Nigeria: Sharing insights and drawing lessons for Kenya : An Expert Group Round-Table Meeting, 16th March 2018, Azure Hotel, Nairobi
    Koge, Jessica ; Opola, Felix ; Obwanga, B. ; Kilelu, Catherine ; Rurangwa, E. - \ 2018
    Wageningen Marine Research (Report / 3R Kenya Workshop Report 002) - 22 p.
    Performance of emerging dairy services agri-enterprises: a case study of youth-led service provider enterprises (SPE)
    Kilelu, Catherine W. ; Koge, Jessica ; Kabuga, Cyrus ; Lee, Jan van der - \ 2018
    Wageningen : Wageningen Livestock Research (Wageningen Livestock Research report 1094) - 39
    Performance of dairy services agri-enterprises : A case of youth-led service provider enterprises (SPE)
    Kilelu, C.W. ; Koge, J. ; Kabuga, Cyrus ; Lee, J. van der - \ 2017
    Wageningen : Wageningen University & Research (3R Kenya Project Practice Brief 002) - 6 p.
    Assessing and improving organic matter, nutrient dynamics and profitability of smallholder farms in Ethiopia and Kenya: Proof of concept of using the whole farm model FarmDESIGN for trade-off analysis and prioritization of GIZ development interventions
    Paul, B.K. ; Birnholz, C. ; Timler, C.J. ; Michalscheck, M. ; Koge, J. ; Groot, J.C.J. ; Sommer, R. - \ 2015
    CIAT International Center for Tropical Agriculture (CIAT working document 408) - 20
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