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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    Effects of technical interventions on flexibility of farming systems in Burkina Faso: Lessons for the design of innovations in West Africa
    Andrieu, N. ; Descheemaeker, K.K.E. ; Sanou, T. ; Chia, E. - \ 2015
    Agricultural Systems 136 (2015). - ISSN 0308-521X - p. 125 - 137.
    crop-livestock systems - sub-saharan africa - climate-change - smallholder farmers - coping strategies - modeling approach - decision-making - constraints - uncertainty - variability
    African farmers have always been exposed to climatic and economic variability and have developed a range of coping strategies. Such strategies form part of flexible farm management, an ability that may prove very valuable in the face of future climate change and market dynamics. The generally low productivity of African smallholder farming systems is usually addressed by research and development institutions by a variety of solutions for improving farm performance. However, changes to the system may affect the flexibility of farms and thus their ability to cope with variability. We quantified the added value of being flexible and how this flexibility is affected by technical changes, such as composting and cattle fattening recurrently proposed and promoted by research and development institutions and projects. The study was conducted in two villages of the agro-pastoral area of Burkina Faso, where livestock, cereals and cotton are the main farming activities. A whole-farm simulation model was developed based on information gathered during focus group meetings with farmers and detailed individual monitoring of farmers' practices. The model simulates farmers' decision rules governing the management of the cropping and livestock farm components, as well as crop and livestock production and farm gross margin. Using the existing decision rules, current farm performance was simulated by assessing the cereal balance, the fodder balance and the whole farm gross margin. Then, by comparing the mean and the coefficient of variation of these indicators resulting from (a) the existing decision rules (baseline scenario) and (b) a set of less flexible rules (rigid scenario), the added value of flexible management was revealed. The adoption of composting practices allowed a slight increase in gross margin associated with a decrease in its between-year variability in comparison with conventional practices. Cattle fattening only led to a higher gross margin in the years with high rainfall and low input prices when no management practices were used to limit dependence on external input. This kind of technical change thus requires increased management agility by farmers to deal with climatic and economic variability. We conclude that assessing the impact of technical interventions not only in terms of productivity but also in terms of changes in flexibility is useful for a better understanding of potential adoption of technical changes
    Fine-scalespatial distribution of plants and resources on a sandy soil in the Sahel.
    Rietkerk, M. ; Ouedraogo, T. ; Kumar, L. ; Sanou, S. ; Langevelde, F. van; Kiema, A. ; Koppel, J. van de; Andel, J. van; Hearne, J. ; Skidmore, A.K. ; Ridder, N. de; Stroosnijder, L. ; Prins, H.H.T. - \ 2002
    Plant and Soil 239 (2002). - ISSN 0032-079X - p. 69 - 77.
    We studied fine-scale spatial plant distribution in relation to the spatial distribution of erodible soil particles, organic matter, nutrients and soil water on a sandy to sandy loam soil in the Sahel. We hypothesized that the distribution of annual plants would be highly spatially autocorrelated and that this would be positively linked with the spatial distribution of erodible soil particles, soil organic matter and nutrients. Further, we hypothesized that larger vegetated patches (a relatively high vegetation cover at coarser spatial scale) will be stronger linked with erodible soil particles, organic matter and nutrients than smaller vegetated patches (a relatively low vegetation cover at coarser spatial scale). Generally, for `low cover' and `high cover' plots, spatially confined micro-elevations with a relatively high volume percentage of erodible very fine – medium sand (50–400 μm), were linked with a higher cover of annual plants. The robustness of vegetation patchiness (expressed as the proportion of the total variance accounted for by spatial dependent variance) was significantly higher for the `high cover' plots. For the `low cover' plots, higher vegetation cover was associated with higher elevations, soil moisture, and volume percentage of very fine to medium sand, but lower organic matter, total N and P. For the `high cover' plots, micro-elevations also consisted of a relatively high volume percentage of very fine to medium sand, and this was associated with dryer conditions and higher total N. Additionally, dryer conditions were weakly correlated with higher organic matter. So, micro-elevations were indirectly associated with dryer and more fertile conditions, which was opposite to what we found for the `low cover' plots.
    Manuel du logiciel interactif (CP-BKF3): sorgho, mil et mais
    Bazi, H. ; Sanou, A. ; Verberne, E. - \ 1995
    Haren (Gr.) : AB-DLO (Nota / AB-DLO 20) - 29
    burkina faso - computersimulatie - maïs - gierst - modellen - onderzoek - simulatie - simulatiemodellen - sorghum bicolor - zea mays - burkina faso - computer simulation - maize - millets - models - research - simulation - simulation models - sorghum bicolor - zea mays
    Les modOles de simulation comme outils de gestion des sols et de developpement agricole: exemple du modOle "Cultures Pluviales du Burkina Faso"
    Bazi, M.H. ; Verberne, E.L.J. ; Bonzi, M. ; Dijksterhuis, G.H. ; Sanou, A.A. - \ 1995
    In: Les modOles de simulation de la crossance végétale comme outils de recherche developpement. Compte rendu d'un séminaire tenu A Bamako, Mali, du 7 an 8 novembre 1994. Rapports PSS no 11, IER, Bamako, DAN-AUW, Wageningen, AB-DLO, Haren/Wageningen / Groot, J.J.R., Coulibaly, A., - p. 53 - 66.
    Les modOles de simulation comme outils pour l' interprétation agronomique des données de sols: cas du modOle "Cultures Pluviales du Burkina Faso"
    Bazi, H. ; Verberne, E.L.J. ; Sanou, A. ; Dijksterhuis, G.H. ; Bonzi, M. - \ 1995
    In: Interpretation agronomiques des donnees de sol: un outil pour la gestion des sols et le développement agricole - p. 145 - 157.
    Traitement informatique des données de so]
    Sanou, A. ; Jongschaap, R.E.E. - \ 1995
    In: Interpretation agronomiques des données de sol: un outil pour la gestion des sols et le développement agricole - p. 37 - 43.
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