This paper finds that organic agriculture has the potential to increase yields in sub-Saharan Africa in some limited cases, but that in many cases, organic agriculture performs at similar levels to conventional agriculture (varied results, with some crops showing higher yields and some showing lower yields).
The study observed five case studies in Ghana and Kenya, covering 1645 farms, for two years. In four cases studies, yields and gross margins were similar under both organic and conventional management. In the remaining case study, coffee, maize and macadamia nut yields increased by 127–308% and gross margins increased nearly three-fold. Across all case studies, the total increase in gross margins was +144% for organic compared to conventional farms.
The authors distinguish between active and passive organic management. Passive refers to farmers who do not use inputs such as synthetic pesticides and mineral fertilisers. In most case studies, less than 10% of the control group of farmers used no conventional (non-organic) inputs, in contrast to perceptions that “organic-by-default” is common among sub-Saharan African farmers.
Active organic management means using practices such as botanical pesticides, crop rotation, agroforestry or intercropping. These practices were not widely adopted in any of the case studies, even the one which showed highly increased yields, despite interventions that encouraged the practices. Farmers that did adopt them had varying motivations, including the possibility of achieving a higher price for their crops, or protecting their health.
Organic farmers faced several challenges, including: pest and disease damage; lack of stable markets; inadequate training availability; unavailability of inputs; and additional labour required for weeding.
The potential of organic agriculture and agroecological approaches for improving food security in Africa is a controversial topic in global discussions. While there is a number of meta-analyses on the environmental, agronomic and financial performance of organic farming, most of the underlying data stems from on-station field trials from temperate regions. Data from sub-Sahara Africa in particular, as well as detailed real-farm data is scarce. How organic farming is implemented in sub-Saharan Africa and how it performs in a smallholder context remains poorly understood. We applied a novel observational two-factorial research design, which allowed to evaluate the impacts of i) interventions for introducing organic agriculture and ii) specific organic management practices on 1,645 farms from five case studies in Ghana and Kenya, which we closely monitored for 24 months. Among the farmers who have been exposed to the interventions, we found heterogeneous adoption of organic agriculture principles, depending on the intervention. Furthermore, we found rather passive than active organic management among farmers. Most yields and gross margins under organic management remained at similar levels as the conventional values in four of the case studies. In one case study, however, coffee, maize and macadamia nut yields increased by 127–308% and farm-level gross margins over all analysed crops by 292%. Pooling our data across all case studies, we found significantly higher (+144%) farm-level gross margins on organically managed farms than on conventional farms. This indicates the potential of organic and agroecological approaches if implemented well. Based on our observations, we argue for improving the implementation of organic agriculture projects in settings with smallholder farmers. Limited capacities, lack of appropriate inputs and market access are major agronomic and institutional challenges to be addressed. Furthermore, we argue for supporting a differentiated debate about which types of organic farming are really desirable by classifying approaches to organic farming according to i) their intention to work organically and ii) the degree of following the organic principles. This will support the design and implementation of targeted policy interventions for stimulating sustainability of farming systems and rural development.
Schader, C., Heidenreich, A., Kadzere, I., Egyir, I., Muriuki, A., Bandanaa, J., Clottey, J., Ndungu, J., Grovermann, C., Lazzarini, G. and Blockeel, J., 2021. How is organic farming performing agronomically and economically in sub-Saharan Africa?. Global Environmental Change, p.102325.