African Agriculture Research Articles

The impact of past and current district-level climatic shifts on maize production and the implications for South African farmers

South Africa’s climate studies generally focus on coarser provincial levels, which aid policy recommendations, but have limited application at the farm level. District level climate studies are essential for farmer participation in climate change mitigation strategies and management. Our study aimed to investigate historical climate data for trends and their influence on maize yields at the magisterial level. Six sites were selected from three major maize-producing provinces in South Africa: Mpumalanga, Northwest, and Free State. Magisterial districts in each province were selected from different Köppen-Geiger climate zones. The climate variables assessed by the Mann–Kendall trend test included maximum or minimum temperature, rainfall, number of extreme high-temperature days, rainfall onset and cessation from 1986 to 2016. The average maximum temperatures were observed to have significant upward trends in most locations, except for Schweizer-Reneke and Bethlehem. The fastest rate of change was observed at Klerksdorp (0.1 °C per 30 years of study), while the Schweizer-Reneke district was the slowest (0.05 °C per 30 years of study). No significant changes were observed in rainfall onset, cessation, or total rainfall in Schweizer-Reneke, Standerton, and Bethlehem, which are scattered across the different provinces. The other districts in each province showed significant changes in these parameters. Rainfall accounted for the significant variation in maize yields over the study period, explaining between 18 and 40% of the variation in the North West, and between 1 and 17% in the Free State. These findings highlight the importance of understanding location-specific changes at a finer scale, which can help farming communities adjust agronomic practices and adapt to local climate shifts.

Neonicotinoid pesticides in African agriculture: What do we know and what should be the focus for future research?

This review provides a comprehensive overview of the direct and indirect effects of neonicotinoid pesticides (NEO-P) within African agricultural ecosystems and identifies research gaps, particularly in the monitoring and regulation of pesticide use. We observed a decline in the numbers of NEO-P studies conducted in Africa since 2019 with 40.7% of the countries reporting at least one study to date. Imidacloprid (33.5%), acetamiprid (23.3%), and thiamethoxam (25.0%) are the most reported NEO-P across the continent with concentrations range from 9.0×10-5 to 7.2×107mgkg-1, 1.7×10-5 to 2.1×103mgkg-1, and 1.0×10-5 to 4.7×104mgkg-1, respectively. NEO-P have been reported in honey, water, vegetables, fruits, and staple foods in most countries and in 92-100% of human urine samples collected in Ghana and Cameroon. This widespread presence indicates a potential food safety and public health concern, warranting further study. Studies on NEO-P interactions with bees have emanated mainly from North Africa (35.3% published studies) while Central/Middle, and Southern Africa accounted for 11.8% each of these studies, all of which were conducted in Cameroon and South Africa, respectively. It is important to have contextual evidence to understand neonicotinoids-pollinator interactions across specific African regions and countries; however, literature regarding the extent of NEO-P toxicities/effects on pollinators is required in 44 African countries. The environmental persistence of NEO-P and their broad-spectrum impact necessitate a re-evaluation of current regulatory practices and adoption of more sustainable pest management strategies across the continent. Furthermore, future studies should focus on investigating the long-term exposure to NEO-P, advanced computational methods in ecological risk assessments and eco-friendly alternatives to NEO-P.

Agroecology, A Therapy for African Agriculture in the Face of Climate Change

It is necessary to review the impact of man on the environment due to soil exhaustion. Intensive agriculture is a dead end because it kills soil biology. We may wonder what solutions can be found for harmonious optimization of the soil/plant system. Agroecology is therefore a mode of agricultural development which aims to optimize production while maintaining the balance of the farm with its natural environment, but also economic and social. Agriculture is one of the only human activities capable, along with forestry and aquaculture, of fixing carbon. Agroecology, like many peasant agricultures practiced throughout the world, makes it possible to respond to the problems of mitigation and adaptation of agriculture by reducing the use of fossil fuels.

African American Farmers’ Attitudes and Perceptions Towards an Urban Agriculture Certificate Program

Farmers’ training through experiential learning plays a crucial role in the success of their farming businesses. Aspiring farmers seek crucial skill sets, including financial management, marketing strategies, pricing, budgeting, whole-farm planning, and long-term decision-making. The objective of this study was to assess African American farmers’ attitudes and perceptions towards an urban agriculture certificate program launched to equip them with farming skills to help them become more successful in an urban setting. A mixed-method (qualitative and quantitative) research approach was used to evaluate the impact of this certificate program. Pre- and post-survey questionnaires and interviews were administered to assess farmers’ prior urban farming knowledge and skills and if there were any changes after the certificate program was launched. Eighteen participants (n = 18) who participated and completed the program were surveyed to measure knowledge and skills gained. Results showed that African American farmers participating in the Gary Urban Agriculture Certificate Program significantly (p < 0.03) increased their skill sets and knowledge about farming in comparison to their mean scores from pre- and post-certificate program. When participants were asked to summarize the impact of the course, several mentioned that it helped them develop a comprehensive approach to planning, planting, maintaining, and harvesting the produce of their farms. Narratives from interview discussions also support the survey results in which the majority expressed a positive impact of the certificate in helping them learn about the useful farming resources around them and gain skills in running a farm. Key findings support the concept that the urban agriculture certificate program administered by Purdue University impacted participant knowledge and provided a positive attitude towards farming. This study helped us understand the impact of the certificate program. Results provided greater awareness of creating programs to support the development of Gary urban farmers’ ability to become more knowledgeable and successful in their farming endeavors.

Modeling how and why aquatic vegetation removal can free rural households from poverty-disease traps

Infectious disease can reduce labor productivity and incomes, trapping subpopulations in a vicious cycle of ill health and poverty. Efforts to boost African farmers' agricultural production through fertilizer use can inadvertently promote the growth of aquatic vegetation that hosts disease vectors. Recent trials established that removing aquatic vegetation habitat for snail intermediate hosts reduces schistosomiasis infection rates in children, while converting the harvested vegetation into compost boosts agricultural productivity and incomes. We develop a bioeconomic model that interacts an analytical microeconomic model of agricultural households' behavior, health status, and incomes over time with a dynamic model of schistosomiasis disease ecology. We calibrate the model with field data from northern Senegal. We show analytically and via simulation that local conversion of invasive aquatic vegetation to compost changes the feedback among interlinked disease, aquatic, and agricultural systems, reducing schistosomiasis infection and increasing incomes relative to the current status quo, in which villagers rarely remove aquatic vegetation. Aquatic vegetation removal disrupts the poverty-disease trap by reducing habitat for snails that vector the infectious helminth and by promoting the production of compost that returns to agricultural soils nutrients that currently leach into surface water from on-farm fertilizer applications. The result is healthier people, more productive labor, cleaner water, more productive agriculture, and higher incomes. Our model illustrates how this ecological intervention changes the feedback between the human and natural systems, potentially freeing rural households from poverty-disease traps.

Equal Opportunity Sensitive Aggregate Wellbeing Measurement: Food Security and Basic Household Income on Sub‐Sahara African Farms

Equal Opportunity Sensitive Aggregate Wellbeing Measurement: Food Security and Basic Household Income on Sub‐Sahara African Farms

Sustainability of Aqua Feeds in Africa: A Narrative Review

In recent decades, the aquaculture industry has seen exponential growth worldwide, surpassing other food production sectors. This review aims to explore the dynamics of aqua feed production, particularly the shift from conventional to local feed production in Africa, driven by cost-effectiveness and the availability of raw materials. This review examines various scientific publications on aqua feed, focusing on both conventional and novel feed formulations and their impact on both small-scale and large-scale aquaculture. Commonly used aqua feed ingredients among African farmers include cassava, maize gluten, groundnut oilcake, sunflower oilcake, soybean meal, kale, peas, garlic, shrimp wastes, and waste blood. Novel ingredients such as insect-based diets, micro-algae, and fish discard formulations are also explored. Aqua feed composition impacts aqua waste, water quality, algae, oxygen demand, fish mortality, and eutrophication, and findings from literature reiterate the need to reorient feed formulation methods and ingredients to achieve a circular economy in Africa. This will entail promoting increased fish production at minimal costs and creating employment while supporting climate adaptation and mitigation efforts. Ultimately, the aqua feed sector has the potential to grow sustainably through the adoption of feed alternatives that prioritize sustainable production and encourage beneficiation studies.

What motivates West African cocoa farmers to value trees? Taking the 4 W approach to the heart of the field

Abstract West Africa, the largest cocoa‐producing region globally, has experienced significant deforestation in recent decades, leading countries to implement large‐scale agroforestry policies; however, most studies on farmers' adoption of agroforestry fail to consider the social (Who?), historical (When?), geographical (Where?), and ecological (What?) factors that influence their motivations to value trees. Drawing from a sample of 150 farmers responsible for the management of 12,096 trees, we quantified the motivations of farmers for 10 material and immaterial uses of trees and used a Bayesian modelling framework to explore the relative importance of the 4 W framework in explaining general motivations, specific to each use, as well as the varying levels of specialization in tree management strategies among farmers. The distribution of use values by category shows that the highest values are associated with (i) agronomic uses (such as shade for cocoa trees and soil fertilization), (ii) food for human consumption, (iii) social purposes, and (iv) medicinal uses. All four aspects of the 4 W framework significantly contribute to understanding farmers' deep motivations, while the influence of each 4 W determinant varies based on the specific material and immaterial uses being considered. The level of specialization or diversification in cocoa farmers' motivations is significantly influenced by their knowledge of tree species and cocoa tree density, with knowledgeable farmers exhibiting greater diversification, while higher cocoa tree density and the presence of remnant trees lead to more specialized strategies that hinder agroforestry adoption. From a political perspective, it is urgent that stakeholders involved in the promotion of agroforestry consider all dimensions of the farmer‐field system. The diversity of farmers' life histories (Who), of cultivated landscapes (Where), of field systems (What), and of time trajectories (When) present both constraints and opportunities with which farmers must contend to transition to much‐desired agroforestry systems. Read the free Plain Language Summary for this article on the Journal blog.

The Fact of Anti-Blackness in South African Farms

This article uses the 2020 protest by a group of white farmers in Senekal as an entry point to the continuing anti-Black racist violence in South Africa’s white-owned farms. It argues that the key demand by the white farmers reflected the living violent history of white farmers, particularly as articulated in the country’s farmlands. The article contends that the history of white racial violence that produced the current racial disparities of land ownership in South Africa is, to an extent, kept alive by the ongoing exploitative and racist practices that have become a defining feature of white farming practices in South Africa. These exploitative and racist practices are well documented in the research on post-1994 white farms. As was the case in the past, anti-Black racist violence in contemporary South Africa relies on the narrative that historically constructed Blacks as subhuman and therefore were regarded as deserving of exploitation and unfair treatment. Blacks in this narrative are cast as not worthy of being treated with dignity and hence the dominant theme of this narrative portray Black life as insignificant, meaningless and disposable.

Agricultural Drones in Africa: Exploring Adoption, Applications, and Barriers

The adoption of drone technology in agriculture is transforming farming practices across Africa by enhancing resource efficiency, reducing operational costs, and promoting environmental sustainability. This paper explores the various applications of drones in African agriculture, including precision farming, crop monitoring, pest control, and livestock management. Drones enable farmers to optimize the use of water, fertilizers, and pesticides, leading to increased yields and improved profitability. Despite the potential benefits, the deployment of drones faces challenges such as high costs, lack of technical expertise, and regulatory barriers. This study highlights the importance of addressing these obstacles to facilitate the widespread adoption of drone technology among both small and large-scale farmers. By leveraging drones, African agriculture can improve food security, scale up operations, and contribute to the continent’s sustainable development goals. The findings of the review include case studies from Ghana, Kenya, and Nigeria which show that government intervention and private-sector partnerships are crucial for overcoming these barriers. This paper highlights the need for targeted training programs and policy reforms to enhance accessibility for smallholder farmers. By leveraging drones, African agriculture can improve food security, scale up operations, and contribute to the continent’s sustainable development goals.

A comprehensive review of integrating biostimulants and biopesticides for organic berry farming: exploring challenges and opportunities for Africa

Agriculture plays a pivotal role in Africa, contributing significantly to sustainable farming practices and the establishment of resilient food systems. Within this context, the use of various types of biostimulants, including microbial biostimulants such as Plant Growth-Promoting microorganisms (PGPM) and non-microbial products like Algal extract, humic acid, and protein hydrolysates, as well as biopesticides, emerges as a promising strategy to bolster sustainable agriculture, particularly in the realm of organic berry production. These substances have the potential to enhance crop growth, fortify stress tolerance, and optimize nutrient absorption, benefiting both human health and the environment. This paper aims to explore the opportunities and challenges associated with incorporating plant biostimulants into organic berry production within the African agricultural sector. To achieve this objective, an extensive and comprehensive review encompassing scientific literature, policy documents, and global data was conducted. The primary focus of this review was to investigate the current state of biostimulant adoption in organic berry farming within the African agricultural sector, with a specific emphasis on identifying potential opportunities and discussing the benefits derived from their application. Additionally, we addressed the challenges encountered and proposed practical approaches to achieving sustainable agriculture. The findings and conclusions of our review reveal the transformative potential of biostimulants in organic berry production. The evidence points to remarkable advancements in plant growth, plant health, overall yield, and fruit nutritional quality. By implementing these substances, we can also minimize the ecological footprint of agricultural practices. However, several challenges remain, including limited accessibility, insufficient awareness and knowledge regarding biostimulant usage, and a shortage of research specific to African agriculture. To overcome these challenges and achieve sustainable agriculture, this paper recommends practical approaches such as raising awareness, investing in research and development, and promoting the use of biostimulants through policy interventions and capacity-building programs. We underscore the importance of stakeholder participation and local adaptations for effectively integrating biostimulants in African agriculture. The significance of integrating plant biostimulants in organic berry production lies in advancing sustainable agriculture. This paper aims to explore the opportunities and challenges associated with incorporating plant biostimulants into organic berry production within Africa.

Circular Regenerative Agricultural Practices in Africa: Techniques and Their Potential for Soil Restoration and Sustainable Food Production

The conventional linear system of global food production and consumption is unsustainable as it is responsible for a substantial share of greenhouse gas emissions, biodiversity declines due land use change, agricultural water stress due resource-intensive water consumption patterns and land degradation. During the last decade (1994–2014), for example, the greenhouse emissions from agriculture in Africa were reported to increase at an average annual rate of between 2.9% and 3.1%, equivalent to 0.44 Gt and 0.54 Gt CO2 per annum, respectively. Between 2000 and 2020, the greenhouse gas emissions from agrifood systems were shown to decrease in all major regions of the world, except in Africa and Asia, where they grew by 35 and 20 percent, respectively. With most of the circular agricultural practices still central to food production in the developing African countries, the continent can spearhead a global return to circular agriculture. Using a descriptive review approach, we explore the literature to examine the extent to which African agriculture is deploying these practices, the potential areas for improvement and lessons for the world in embracing sustainable food production. We underscore that the farming communities in sub-Saharan Africa have, for decades, been using some of the most effective circular agricultural principles and practices in agricultural production. We further show that practices and strategies akin to sustainable agricultural production include agronomic practices, smart irrigation options, renewable energy harvesting and waste-to-fertilizer technologies. All of these technologies, which are central to sustainable agricultural production, are not new to Africa, although they may require packaging and advocacy to reach a wider community in sub-Saharan Africa.

Effect of Biostimulants and Glyphosate on Morphophysiological Parameters of Zea mays (L.) Seedlings under Controlled Conditions

Maize (Zea mays L.) is the major produced crop in South Africa, but numerous abiotic/biotic stressors threaten its production. Herbicides are mainly in the agricultural sector to minimise crop yield losses caused by weed competition. However, with most weeds becoming resistant to glyphosate, South African farmers have used higher herbicide concentrations than typically recommended. This study was conducted to determine the effect of two biostimulants (brassinosteroids and KELPAK) and glyphosate on the morphophysiological parameters of maize seedlings. Experiments were carried out in the glasshouses of the Department of Soil, Crop, and Climate Sciences at the University of the Free State in Bloemfontein for eight weeks over two seasons, 2017/2018 and 2018/2019. The treatments did not significantly affect all maize morphological parameters except the plant dry mass. Compared to the control, plant dry mass was significantly (p < 0.05) increased by 15.72 g when glyphosate was applied in combination with brassinosteroids during the 2019 growing season. The application of glyphosate, brassinosteroids, and KELPAK differed significantly (p < 0.05) between weeks across the physiological parameters in the two seasons: an irrefutable significant increase was recorded in the rates of transpiration between the weeks. Although significant differences were recorded in the chlorophyll fluorescence, chlorophyll, and carotenoid content, these parameters were similar to the control, especially in the last week of data collection. During the early developmental stage of maize, farmers can administer biostimulants—brassinosteroid (5 g ai ha−1) and KELPAK (5% ai ha−1)—alone and in combination in glyphosate-resistant maize cultivars treated with glyphosate to aid maize seedlings.

The future is only the beginning

Recent advancements in genome editing have captured the attention of scientists and policymakers, who contend that the technology has a large role to play in advancing food and climate security on the African continent. However, the modest results of earlier generations of biotechnology—such as genetically modified (GM) crops—raise questions about the sustainability of new technological interventions. This special feature examines lessons learned from previous generations of GM crops and other agricultural technologies, using them to analyze the portfolio of gene edited crops being developed for African farmers today. In this article, we introduce the 6 papers that make up the special feature by way of examining future-oriented discourses around the advancement of genome editing. Drawing on Science and Technology Studies, political ecology, and critical development studies, this introduction highlights the crucial factors that shape technology development, agricultural practice, and the politics of knowing and emphasizes the need to look toward multiple, diverse futures.

SELECTED PROBLEMS OF AFRICAN AGRICULTURE AND FOOD PRODUCTION

SELECTED PROBLEMS OF AFRICAN AGRICULTURE AND FOOD PRODUCTION

The effects of market-oriented farming on living standards, nutrition, and informal sharing arrangements of smallholder farmers: the case of African indigenous vegetables in Kenya

The shift from subsistence to more market-oriented agriculture is viewed as essential to increase smallholder farmers’ welfare. However, its impact on farmers’ nutrition and informal sharing arrangements and associated solidarity within African farming communities remains uncertain. To analyse these trade-offs, we study the growing commercialization of African indigenous vegetables (AIV) in Kenya. These vegetables are an essential component of local diets in rural areas but also of informal sharing arrangements that provide access to food outside of markets. This article combines quantitative data from a 2016–2022 panel survey of farmers with qualitative data from focus group discussions. Results based on household fixed-effects models show a significant increase in households’ non-food expenditures due to selling AIV. The results suggest that selling AIV did not negatively affect nutrition outcomes but did not improve them either. Informal AIV sharing between households decreased further with growing market participation. Panel data models indicate, however, inconsistent and insignificant changes in associated solidarity indicators. We attribute this to the multiple and sometimes opposing effects of market-oriented farming on solidarity, as revealed by focus group discussions. While some farmers perceive reduced solidarity due to less informal AIV sharing, others perceived this traditional solidarity to be partially forced. Other forms of social interaction have also emerged, such as cooperatives and more intensive knowledge sharing. Despite concerns about the loss of informal sharing and community solidarity and limited improvements in nutrition outcomes, the tangible income gains generated by selling AIV are likely to foster further growth in the AIV sector.

Substantial impacts of climate shocks in African smallholder agriculture

Substantial impacts of climate shocks in African smallholder agriculture

A Plum Story? Early Encounters and Colonial Views of the Safu in Central Africa, Seventeenth-Twentieth Centuries

ABSTRACT The diversity of edible species originating in Africa is considerable, but the history of their use and domestication remains largely neglected, despite existing historical records. This essay aims to explore attitudes towards safu (Pachylobus edulis), a Central African fruit that defies Western categories. Based on more than one hundred archival documents, this study examines the history of the safu and the tree that produces it as seen by Europeans (German, English, Belgian, Spanish, French, Italian, Portuguese, Swedish, etc.) present in Central Africa. The documentation collected on safus and safu trees reflects not only local views of the species but also the broader European projects pursued on the continent and the vision of African foodways. Indeed, their valuation is symptomatic of food encounters and hierarchies during colonial settlement. More broadly, it reveals how subsistence and agriculture were viewed in the region: the ubiquity of this fruit tree around villages, as often reported, contrasts sharply with the historical narrative of the absence of African agriculture in the tropics. Finally, it shows how colonial enterprises, despite hindered dispersal and missed opportunities, circulated the species in different parts of the planet.

Typologies of South African small-scale farmers and their risk perceptions: an unsupervised machine learning approach

PurposeSmall-scale farmers are highly heterogeneous with regard to their types of farming, levels of technology adoption, degree of commercialization and many other factors. Such heterogeneous types, respectively groups of small-scale farming systems require different forms of government interventions. This paper applies a machine learning approach to analyze the typologies of small-scale farmers in South Africa based on a wide range of objective variables regarding their personal, farm and context characteristics, which support an effective, target-group-specific design and communication of policies.Design/methodology/approachA cluster analysis is performed based on a comprehensive quantitative and qualitative survey among 212 small-scale farmers, which was conducted in 2019 in the Limpopo Province of South Africa. An unsupervised machine learning approach, namely Partitioning Around Medoids (PAM), is applied to the survey data. Subsequently, the farmers' risk perceptions between the different clusters are analyzed and compared.FindingsAccording to the results of the cluster analysis, the small-scale farmers of the investigated sample can be grouped into four types: subsistence-oriented farmers, semi-subsistence livestock-oriented farmers, semi-subsistence crop-oriented farmers and market-oriented farmers. The subsequently analyzed risk perceptions and attitudes differ considerably between these types.Originality/valueThis is the first typologisation of small-scale farmers based on a comprehensive collection of quantitative and qualitative variables, which can all be considered in the analysis through the application of an unsupervised machine learning approach, namely PAM. Such typologisation is a pre-requisite for the design of more target-group-specific and suitable policy interventions.

Effects of changing farming practices in African agriculture

Information on the effects of changing agricultural management on crop and livestock performance is critical for developing evidence-based policies, investments, and programs. Evidence for Resilient Agriculture (ERA) v1.0.1 presents a dataset that harmonizes and aggregates 112,859 observations from 2,011 agricultural studies taken place in Africa between 1934 and 2018. The dataset includes information on the effect of 364 combinations of management practices and technologies on 87 environmental, social, and economic indicators of outcomes. Observations are geolocated and temporally tagged and thus can be linked to other datasets such as historical weather, soil properties, and road networks. ERA offers a new resource for understanding the impacts of changing farming practices under diverse environmental contexts, providing data to support strategic interventions aimed to enhance productivity, resilience, and sustainability of African agriculture.