How well did the evaporative passive cooling blanket preserve fresh produce in Kenya, Uganda and Nigeria?

Aquaculture practices from sub-Saharan Africa are characterised by low production, owing to improper technology. Production can be increased through integrating fish farming with other existing on-farm activities, particularly livestock husbandry. We assessed the role of fish-poultry integration on all male Nile tilapia, Oreochromis niloticus growth performance, yields and economic benefits among smallholder farmers in sub-Saharan Africa, Tanzania. The study also compared phytoplankton species composition, abundance and biomass between the fish-poultry integration and non-integrated system. After 180 days of the experiment, all male O. niloticus cultured under fish-poultry integration exhibited significantly higher growth rates than those in the non-integrated system (p < 0.05). Gross fish yield (GFY), net fish yield (NFY) and net annual yields (NAY) obtained from fish-poultry integration were significantly higher than those from non-integrated system (p < 0.05). Partial enterprise budget analysis revealed that fish-poultry integration was more profitable than the non-integrated system. Moreover, fish-poultry integrated system produced significantly higher phytoplankton abundance and biomass than those from the non-integrated system. Results demonstrate that rural smallholder farmers can achieve higher growth rate, farm net yields and income by integrating all male O. niloticus with other on-farm activities than practising a stand-alone fish culture system.

Savanna Africa is characterized by smallholding agricultural systems that produce a mixture of food and cash crops in a single season. Crops can be rotated, intermixed, or grown in specialized plots. In the former rainforests nearer the equator, crops such as cassava and maize are sown in close proximity to cocoa and oil palms, while tea is sometimes grown in specialized plots or in plantations. Traditionally, the cash crops of the savanna have been cotton and groundnuts, with cocoa, oil palm and tea in the forest areas. Various UNCTAD and FAO reports have recently drawn attention to the declining terms of trade for these products and the serious impact this has been having on the African economies concerned through loss of foreign-exchange earnings and the lack of replacement exports. UNCTAD now proposes that this dependence on a few basic exports should be overcome by domestic programmes of diversification and product development sponsored directly by African governments, as well as by international measures to reduce fluctuations in export earnings. This paper questions how these proposals might affect the various systems of smallholder agriculture in Sub-Saharan Africa.

Food security and livelihoods among smallholder farmers in sub-Saharan Africa are often constrained by limited farm resource endowment. It can be difficult to improve resource endowment given barriers such as low land availability and the unaffordability of agricultural inputs, so here we ask whether farmers can gain a better return on their resources through optimizing their farm strategy in terms of the composition and/or diversity of crop and livestock species raised. Our survey of 1,133 smallholder farmers in western Kenya and northern Nigeria, using a modified version of RHoMIS, indicated that different farm strategies were related to differences in food security and farm incomes. In particular, we found that it was possible for farms with a high species richness but low resource endowment to achieve similar or better food security and income outcomes than farms with low species richness and high resource endowment. This indicates strong potential for diversification to improve food security and livelihoods among smallholder farmers. However, further research will be required to prove a causal relationship. We also noted some exceptions to this trend that require investigation: increasing species richness was not beneficial for low-resourced, livestock-focused farmers in western Kenya, and increasing species richness was associated with a decline in dietary diversity in northern Nigeria (due to declines in purchased dietary diversity that outweighed increases in on-farm and other sources of dietary diversity). Similar analyses could be applied to a wider RHoMIS dataset covering a greater diversity of countries and agro-ecological zones to help identify where, and why, different farm strategies result in better or worse outcomes for smallholder farmers.

Across the African continent efforts to intensify agriculture have been limited to specific commodities, locations or particular production schemes. The causes for the widespread failure to overcome low land and labor productivity while maintaining ecosystem services have often be analyzed but remain poorly understood. A social-ecological system approach may help to better understand the complex nature of ecological disadvantages, postcolonial structures, limited connect between producers and consumer markets, low off-farm livelihood opportunities, partial underpopulation and lacking experience with the concept of sustainable production as a major impediment for sustainable intensification of the agricultural sector. Nevertheless, recent success stories in agro-pastoral systems as well as urban vegetable and animal production and associated value chains in West Africa, and in intensive mixed-cropping systems of the Great Lakes Region show the potential of stakeholder-driven agricultural intensification. Proper interpretation of these cases may provide lessons for a more widespread eco-intensification of smallholder agriculture in sub-Saharan Africa.

Background: Smallholder farmers in Sub-Saharan Africa are highly vulnerable to climate change impacts, including droughts, floods, and pest outbreaks, which threaten yields, incomes, and food security. Climate-smart agriculture (CSA) aims to enhance productivity, adaptation/resilience, and mitigation, yet adoption remains limited due to resource constraints. Artificial intelligence (AI) tools come as a game-changer to make CSA more accessible and effective for farmers with small farms. Aim: This systematic review synthesises empirical evidence on AI-enabled CSA interventions and their impacts on smallholder resilience in Sub-Saharan Africa. Methods: PRISMA 2020 guidelines were followed, with searches on Scopus, Web of Science, CAB Abstracts, Google Scholar, and AGRICOLA for studies published between 2015 and 2025. Eligible records were those with evidence of AI applications linked to CSA practices and resilience outcomes in smallholders. After screening 1,301 records, nine studies/reports made it to the final inclusion and were assessed using the Mixed Methods Appraisal Tool (MMAT). Results were synthesised narratively. Results: The nine included sources (covering Kenya, Tanzania, Mali, Ethiopia, Malawi, Nigeria, and Ghana) describe four main AI intervention types: image-based pest/disease detection, advisory chatbots, precision resource management apps, and predictive modelling. These models have already been used by hundreds to tens of thousands of farmers. Reported impacts include yield increases (e.g., +0.9–1 t/ha for rice, up to 25% for wheat), income gains ($200–600/ha), reduced input waste, and improved adaptation to shocks. All interventions align strongly with CSA pillars, particularly productivity and adaptation, with mitigation benefits from efficiency gains. Conclusion: AI-enabled CSA shows that it can be transformative for enhancing smallholder resilience in Sub-Saharan Africa, delivering modest but meaningful short-term gains in yields, incomes, and climate adaptation. Effects are positive, although it depends on the context of application, constrained by digital barriers. Policymakers and developers should prioritise inclusive, mobile-based scaling. Further long-term, rigorous studies are essential to confirm durability and broaden geographic coverage.

Agricultural production on smallholder farms in sub-Saharan Africa (SSA) is hampered by countless challenges, chief among which is soil degradation due to unsustainable farming practices, inadequate technical and financial support, and climate change. Moreover, the ever-increasing African population, which is directly proportional to an increase in the demand for food, makes the situation grimmer. This has consequently resulted in the active search for alternative approaches to agricultural production that do not only ensure that there is enough food at the table but do so sustainably. One such approach that has attracted the interest of researchers, funders and policymakers is sustainable intensification. However, there have been numerous discussions and debates on the usefulness of this concept in increasing crops yields for African farmers, with some opponents going as far as labelling the approach an oxymoron. Therefore, it is important to assess the potential of the concept to not only sustainably feed the rural population but deliver food from the soil to their forks from an African perspective. Therefore, this chapter highlights key sustainable intensification approaches across sub-Saharan Africa that have resulted in significant yield gains across sub-Saharan Africa (SSA) and discusses policy issues required to promote this concept.

Sustainable agriculture is vital for food security and environmental conservation in Sub-Saharan Africa (SSA), where smallholder farmers encounter challenges like limited resources and market access. E-commerce platforms offer potential solutions by enhancing connectivity and sustainable practices. This review assesses the impact of such platforms on smallholder agriculture in the region, analysing the literature, reports, and case studies from 2010 to 2024 sourced from databases like Google Scholar and Scopus. Inclusion criteria focused on market access, economic outcomes, and sustainability. Findings indicate that e-commerce platforms notably improve market access, leading to better prices and reduced post-harvest losses. They also facilitate information flow, encouraging sustainable practices. However, challenges such as digital literacy and infrastructure deficits persist. E-commerce platforms positively influence sustainable agriculture in SSA by improving market access and supporting sustainable practices. Overcoming barriers through policy interventions and capacity-building is crucial for maximising these benefits. Further research is needed to explore long-term impacts and scalable models.

Abstract. Intensification of smallholder agriculture in sub-Saharan Africa is necessary to address rural poverty and natural resource degradation. Integrated soil fertility management (ISFM) is a means to enhance crop productivity while maximizing the agronomic efficiency (AE) of applied inputs, and can thus contribute to sustainable intensification. ISFM consists of a set of best practices, preferably used in combination, including the use of appropriate germplasm, the appropriate use of fertilizer and of organic resources, and good agronomic practices. The large variability in soil fertility conditions within smallholder farms is also recognized within ISFM, including soils with constraints beyond those addressed by fertilizer and organic inputs. The variable biophysical environments that characterize smallholder farming systems have profound effects on crop productivity and AE, and targeted application of agro-inputs and management practices is necessary to enhance AE. Further, management decisions depend on the farmer's resource endowments and production objectives. In this paper we discuss the "local adaptation" component of ISFM and how this can be conceptualized within an ISFM framework, backstopped by analysis of AE at plot and farm level. At plot level, a set of four constraints to maximum AE is discussed in relation to "local adaptation": soil acidity, secondary nutrient and micronutrient (SMN) deficiencies, physical constraints, and drought stress. In each of these cases, examples are presented whereby amendments and/or practices addressing these have a significantly positive impact on fertilizer AE, including mechanistic principles underlying these effects. While the impact of such amendments and/or practices is easily understood for some practices (e.g. the application of SMNs where these are limiting), for others, more complex processes influence AE (e.g. water harvesting under varying rainfall conditions). At farm scale, adjusting fertilizer applications to within-farm soil fertility gradients has the potential to increase AE compared with blanket recommendations, in particular where fertility gradients are strong. In the final section, "local adaption" is discussed in relation to scale issues and decision support tools are evaluated as a means to create a better understanding of complexity at farm level and to communicate appropriate scenarios for allocating agro-inputs and management practices within heterogeneous farming environments.

The application of remote sensing methods to assess crop vigor and yields has had limited applications in Sub-Saharan Africa (SSA) due largely to limitations associated with satellite images. The increasing use of unmanned aerial vehicles in recent times opens up new possibilities for remotely sensing crop status and yields even on complex smallholder farms. This study demonstrates the applicability of a vegetation index derived from UAV imagery to assess maize (Zea mays L.) crop vigor and yields at various stages of crop growth. The study employs a quadcopter flown at 100 m over farm plots and equipped with two consumer-grade cameras, one of which is modified to capture images in the near infrared. We find that UAV-derived GNDVI is a better indicator of crop vigor and a better estimator of yields—r = 0.372 and r = 0.393 for mean and maximum GNDVI respectively at about five weeks after planting compared to in-field methods like SPAD readings at the same stage (r = 0.259). Our study therefore demonstrates that GNDVI derived from UAV imagery is a reliable and timeous predictor of crop vigor and yields and that this is applicable even in complex smallholder farms in SSA.

ABSTRACTConservation agriculture (CA) is being promoted as an energy efficient and cost-effective farming system that conserves soil and water and improves crop yields. Adoption of this farming system can contribute to attainment of Sustainable Development Goal (SDG) 2: end hunger, achieve food security and improved nutrition, and promote sustainable agriculture. However, the adoption rate of this new farming technique by smallholder farmers in sub-Saharan Africa (SSA) is low. The trade-offs and synergies related to the three pillars that anchor CA have not, however, been investigated in the context of Botswana. Farmers are faced with trade-offs in the use of crop residue in CA as mulch with traditional use as feed for livestock. This paper reviews the components of CA with a view to contribute to the development of CA strategies for Botswana. We show that adoption of CA in SSA is challenged by lack of weed control measures, the lack of a market for grain legumes and competing uses of crop residue. The paper highlights the discrepancy between CA methods and current government subsidies, issues that may restrain the adoption of CA in Botswana. The paper concludes by making recommendations for research and policy development for sustainable CA practices in Botswana.

Introduction: Maize is a staple crop critical to the food security and livelihoods of millions of smallholder farmers in Sub-Saharan Africa. Despite the availability of improved maize varieties, adoption rates among farmers remain suboptimal. Understanding the traits that drive adoption and identifying key production constraints is essential for the development and dissemination of varieties that meet farmers' needs. Aims: This study aimed to identifying the most valued traits of improved maize varieties from the farmers' perspective, assessing the socio-economic and biophysical factors influencing the adoption of these varieties and identifying the main production constraints faced by farmers in different agro-ecological zones. Study Design: The study was conducted in three regions representing diverse agro-ecological zones. A multi-stage sampling technique was used to select a representative sample of maize farmers. Data collection involved focus group discussions (FGDs), key informant interviews (KIIs), and household surveys. PRA tools such as pairwise ranking and matrix scoring were employed to capture qualitative and quantitative data on adoption traits and production constraints. Place and Duration of Study: The study took place at Ejura Sekyeredumasi, Nkoranza South District and Wenchi Municipal district, between June 2017 and December 2017. Methodology: Descriptive statistics were used analyzed the demographic characteristics of maize farmers as well as socioeconomic factors influencing the adoption of improved maize farming technology using SPSS 16 version. Data collected included; socio-demographic characteristics, adoption of improved maize varieties and constraints to maize production. Results: The results showed that about 78 % and 18 % of farmer respondents perceived that both fertilizers and improved seed were too expensive. Other constraints to maize production were drought, high cost of other agro-inputs, lack of improved cultivars and poor soil fertility significantly influenced the adoption of improved maize farming technologies in the area Conclusion: The study underscores the importance of incorporating farmers' preferences and addressing context-specific production constraints in maize breeding programs. Enhanced extension services, improved seed distribution systems, and tailored agronomic practices are recommended to increase adoption rates and improve productivity. Participatory approaches in agricultural research are vital for aligning breeding objectives with the real-world needs of smallholder farmers, ensuring the relevance and impact of improved maize varieties in the Ghana.

Postharvest losses remain a challenge among smallholder farmers in sub-Saharan Africa. The uses of hermetic storage containers (hermetic bags and metallic silos), tarpaulin sheet (plastic sheet) and raised racks reduce postharvest deterioration of grain. This study evaluated the effectiveness of selected improved drying and storage postharvest technologies and practices in reducing maize grain postharvest losses among smallholder farmers in Kamuli and Apac districts, Uganda. The assessed improved storage technologies were hermetic bags and metallic silos against woven polypropylene bags (common farmer practice). For drying, use of tarpaulins and raised racks were assessed against drying on bare ground (common farmer practice). Grain quality and quantity were determined at harvest as well as during drying and six months of storage using Longe 10H variety. Mean quantitative losses, mold infection and aflatoxin level of maize at harvest were 13.72 ± 5.44%, 59.01 ± 17.97% and 1.21 ± 0.7 ppb, respectively for traditional practice. Improved drying and storage technologies resulted in significantly lower (p≤0.05) losses, mold infection and aflatoxin level than the common farmer practices. Drying on bare ground (3.04 ± 1.50%) resulted in 1.94 times and 7.07 times higher quantitative losses than drying on tarpaulins (1.56 ± 1.09%) and raised racks (0.43 ± 0.58%). By the sixth month of storage, polypropylene bag storage resulted in 3.7 times and 84 times higher quantitative losses (23.7 ± 5.11%) than hermetic bags (6.33 ± 5.41%) and metallic silos (0.28 ± 0.22%), respectively. Polypropylene bag storage also resulted in 4.4 times and 6 times higher aflatoxin levels (45.82 ± 20.88 ppb) than hermetic bags and metallic silos, respectively. The interaction effects of type of drying technology and storage technology used on aflatoxin levels at the end of the storage period was significant. The highest mold infection and aflatoxin levels were observed when drying was done on bare ground and storage was in polypropylene bags and by the sixth month of storage, mold infection was 90.54 ± 5.48% and average aflatoxin content was 53.47 ± 22.79 ppb. Storage in metallic silos was the most effective in controlling mold infection and aflatoxin contamination, regardless of drying practice, while storage in polypropylene bags was the least effective. From the results, improved drying and storage technologies and practices were found to reduce postharvest maize losses, mold infection and aflatoxin level by over 50%. Use of raised drying racks and storage in metallic silos was found to be the most effective combination in maintaining maizequality and reducing postharvest losses. Key words: Aflatoxins, maize quality, mold infection, grain storage, postharvest losses

Climate change and variability negatively impacts outputs of smallholder farmers in sub-Saharan Africa and Ghana for that matter. This has resulted in the introduction of numerous planned adaptation initiatives. Although there is literature on institutionally designed adaptation initiatives, not much coverage has been given to the effect of adaptation interventions on farm output in the region. This study investigated the effects of planned climate variability adaptation interventions on smallholder farmer output in the Bolgatanga and Garu and Tempani districts of the Upper East Region, Ghana. Emphasis was on smallholder crop farmers cultivating maize and millet due to the staple nature of both crops in the region. Using a mix of methods, the study sort data from 184 randomly sampled smallholder farmers of two initiatives in the region (i.e., Climate Change Adaptation in Northern Ghana Enhanced-CHANGE and Adaptation Learning Programme-ALP). Primary data were analysed using descriptive statistics (SPSS-v22) and thematic analytical techniques. The study found that farmers adopted and implemented adaptation interventions like improved seed varieties, soil and crop health interventions, village savings and loans associations, planting and land management and weather forecast information. The study concludes that, the average output of maize and millet among smallholder farmers increased more than significantly by 92.5% and 73.1% respectively after the adoption and implementation of planned climate adaptation interventions under the projects. The study recommended the design and diffusion of similar planned adaptation interventions among smallholder farmers in other communities in the Upper East region of Ghana on a case-by-case basis.

SummarySorghum bicolor is among the most important cereals globally and a staple crop for smallholder farmers in sub-Saharan Africa. Approximately 20% of sorghum yield is lost annually in Africa due to infestation with the root parasitic weed Striga hermonthica. Existing Striga management strategies are not singularly effective and integrated approaches are needed. Here, we demonstrate the functional potential of the soil microbiome to suppress Striga infection in sorghum. We associate this suppression with microbiome-mediated induction of root endodermal suberization and aerenchyma formation and with depletion of haustorium-inducing factors, compounds required for the initial stages of Striga infection. We further identify specific bacterial taxa that trigger the observed Striga-suppressive traits. Collectively, our study describes the importance of the soil microbiome in the early stages of root infection by Striga and pinpoints mechanisms of Striga suppression. These findings open avenues to broaden the effectiveness of integrated Striga management practices.

Cowpeas provide food and income for many small-holder farmers in Africa. Cowpea grains contain substantial quantities of protein, carbohydrates, vitamins, and fiber. In areas where subsistence farming is practiced, cowpea’s protein is cheaper than that obtained from other sources such as fish, meat, poultry or dairy products and combines well with cereal grains in diets. However, long-cooking times, typical of many grain legumes, is a major limitation to the utilization of cowpeas especially among the low-income and growing middle-income population of Africa. Long periods of cooking cowpeas lead to loss of nutrients, loss of useful time and increased greenhouse gas emission through increased burning of firewood. Fast-cooking cowpeas has the potential to deliver highly nutritious food to the hungry within shorter periods, encourage less use of firewood, improve gender equity, increase the consumption of cowpeas, trigger an increase in demand for cowpeas and thus incentivize cowpea production by smallholder farmers in Sub-Saharan Africa. In this study, the inheritance of storage-induced cooking time in cowpeas was investigated. Two sets of bi-parental crosses were conducted involving three cowpea genotypes: CRI-11(1)-1, C9P(B) and TVu7687. Generation means from six generations were used to determine the phenotypic and genotypic variances and coefficients of variation. Broad and narrow sense heritabilities and genetic advance percentage of mean were estimated. Generation mean analysis showed that additive, dominant, additive–additive, additive–dominant, and dominant–dominant gene actions were significant (p < 0.001). Fast-cooking trait was dominant over the long-cooking trait. Broad sense heritability for crosses C9P(B) × CRI-11(1)-1 and TVu7687 × CRI-11(1)-1 were 0.94 and 0.99 respectively while narrow sense heritabilities were 0.84 and 0.88 respectively. Genetic advances were 27.09 and 40.40 respectively. High narrow-sense heritabilities and moderate genetic advance for the fast-cooking trait indicated the presence of additive genes in the trait and the possibility of introgressing the trait into farmer-preferred varieties using conventional selection methods. However, due to significant epistatic gene effects observed, effective selection for fast-cooking trait would be appropriate at advanced generations.