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Why Promote Improved Fallows as a Climate-Smart Agroforestry Technology in Sub-Saharan Africa?

Author

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  • Samuel T. Partey

    (CGIAR Research Program on Climate Change, Agriculture and Food Security, International Crops Research Institute for the Semi-Arid Tropics, Bamako BP 320, Mali
    All authors contributed equally to the development of the manuscript and have approved the final manuscript.)

  • Robert B. Zougmoré

    (CGIAR Research Program on Climate Change, Agriculture and Food Security, International Crops Research Institute for the Semi-Arid Tropics, Bamako BP 320, Mali
    All authors contributed equally to the development of the manuscript and have approved the final manuscript.)

  • Mathieu Ouédraogo

    (CGIAR Research Program on Climate Change, Agriculture and Food Security, International Crops Research Institute for the Semi-Arid Tropics, Bamako BP 320, Mali
    All authors contributed equally to the development of the manuscript and have approved the final manuscript.)

  • Naresh V. Thevathasan

    (School of Environmental Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
    All authors contributed equally to the development of the manuscript and have approved the final manuscript.)

Abstract

In the literature, a lot is discussed about how agroforestry can achieve the mitigation, adaptation and productivity goals of climate-smart agriculture (CSA). However, this may be relatively too broad to assess the trade-offs and synergies of how specific agroforestry technologies or practices achieve the three pillars of CSA. Here, we provide an overview of how improved fallows (an agroforestry technology consisting of planting mainly legume tree/shrub species in rotation with cultivated crops) may achieve the goals of climate-smart agriculture in Sub-Saharan Africa (SSA). Our review showed that improved fallow systems have real potential to contribute to food security and climate change mitigation and adaptation in SSA. Under proper management, improved fallows can increase maize yields to about 6 t ha −1 , which is comparable to conventional maize yields under fertilization. This is attributed to improved soil fertility and nutrient use efficiency. Although data was generally limited, the growing literature showed that improved fallows increased soil carbon sequestration and reduced greenhouse emissions. Further, as a multiple output land use system, improved fallows may increase fodder availability during dry periods and provide substantial biomass for charcoal production. These livelihood options may become important financial safety nets during off seasons or in the event of crop failures. This notwithstanding, the adoption of improved fallows is mainly in Southern and Eastern Africa, where over 20,000 farmers are now using Sesbania sesban , Tephrosia vogelii , and Cajanus cajan in two-year fallows followed by maize rotations. Land tenure issues, lack of social capital, and improved germplasm and accessions of fallow species have been cited as constraints to scaling up. However, development of seed orchards, nursery development, and the willingness of policy makers to create a policy environment that addresses market failures and alleviates disincentives should improve adoption and future scaling up.

Suggested Citation

  • Samuel T. Partey & Robert B. Zougmoré & Mathieu Ouédraogo & Naresh V. Thevathasan, 2017. "Why Promote Improved Fallows as a Climate-Smart Agroforestry Technology in Sub-Saharan Africa?," Sustainability, MDPI, vol. 9(11), pages 1-12, October.
    • Handle: RePEc:gam:jsusta:v:9:y:2017:i:11:p:1887-:d:116449
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    References listed on IDEAS

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    1. Kiptot, Evelyne & Hebinck, Paul & Franzel, Steven & Richards, Paul, 2007. "Adopters, testers or pseudo-adopters? Dynamics of the use of improved tree fallows by farmers in western Kenya," Agricultural Systems, Elsevier, vol. 94(2), pages 509-519, May.
    2. Masikati, P. & Manschadi, A. & van Rooyen, A. & Hargreaves, J., 2014. "Maize–mucuna rotation: An alternative technology to improve water productivity in smallholder farming systems," Agricultural Systems, Elsevier, vol. 123(C), pages 62-70.
    3. Freier, Korbinian P. & Bruggemann, Rainer & Scheffran, Jürgen & Finckh, Manfred & Schneider, Uwe A., 2012. "Assessing the predictability of future livelihood strategies of pastoralists in semi-arid Morocco under climate change," Technological Forecasting and Social Change, Elsevier, vol. 79(2), pages 371-382.
    4. Louis Verchot & Meine Noordwijk & Serigne Kandji & Tom Tomich & Chin Ong & Alain Albrecht & Jens Mackensen & Cynthia Bantilan & K. Anupama & Cheryl Palm, 2007. "Climate change: linking adaptation and mitigation through agroforestry," Mitigation and Adaptation Strategies for Global Change, Springer, vol. 12(5), pages 901-918, June.
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    Cited by:

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    2. Michael Rennings & Philipp Baaden & Carolin Block & Marcus John & Stefanie Bröring, 2024. "Assessing emerging sustainability-oriented technologies: the case of precision agriculture," Scientometrics, Springer;Akadémiai Kiadó, vol. 129(6), pages 2969-2998, June.
    3. Mohamed Rafik Noor Mohamed Qureshi & Ali Saeed Almuflih & Janpriy Sharma & Mohit Tyagi & Shubhendu Singh & Naif Almakayeel, 2022. "Assessment of the Climate-Smart Agriculture Interventions towards the Avenues of Sustainable Production–Consumption," Sustainability, MDPI, vol. 14(14), pages 1-24, July.

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