Research & reports

Peter Sanjo Adewale, Sunday Clement Olubunmi Makinde, V. Kusemiju, Olawole O. Obembe · Journal of sustainability and environmental management · Nigeria

This study measured and compared lead (Pb), cadmium (Cd) and manganese (Mn) concentrations in soil and leafy vegetables (Amaranthus hybridus, Celosia argentea, Corchorus olitorius) using atomic absorption spectrophotometry at Urban Expressway Farms (UEF) and Peri-urban Road Farms (PRF) in Lagos State, Nigeria. It found the highest Pb concentration (0.93+/-0.06) in Celosia argentea at UEF, and the highest Cd (0.51+/-0.11) and Mn (0.98+/-0.02) concentrations in Amaranthus hybridus at UEF, with Pb in Celosia argentea 5 m from the expressway and Cd in Amaranthus hybridus 10 m from the expressway exceeding WHO/FAO permissible levels; heavy metal residue levels were driven more by farm location than by vegetable type, and the study calls for regular monitoring to prevent consumption of contaminated leafy vegetables and recommends farmers cultivate fields farther from expressways.

Yohannes Zekarias · · Ethiopia

This study examines factors determining the performance and growth of micro and small-scale enterprises (MSEs) in Gulelle sub-city, Addis Ababa, Ethiopia, covering manufacturing, service, construction, agro-industry, urban agriculture, and textile and garment sectors. Using a quantitative causal design, data were collected via questionnaire from 312 operators selected through stratified sampling and analyzed with descriptive and inferential statistics. Regression analysis showed that access to finance, technology infrastructure, and government support explained the variation in MSE performance.

Sandra Boatemaa Kushitor, Shawn Alimohammadi, Paul Currie · PLOS Sustainability and Transformation · South Africa

An ethnographic study using in-depth interviews and participant observation, conducted April to November 2020 with thematic analysis, examined the role of the informal food sector in food flows in Cape Town, South Africa, during the COVID-19 lockdown. The informal food sector has historically been subject to exclusionary urban policies, and lockdown regulations caused food flows through the sector to cease, resulting in job loss and increased food insecurity. The sector subsequently reshaped food flows through urban agriculture, food aid programmes and community change, though it can also hinder urban modernisation. The study concludes regulatory frameworks need to be more inclusive of the sector.

Hadaro Hando Filmon, Alemu Legesse Mitke · African Journal of Agricultural Research · Africa

In Addis Ababa, Ethiopia, a household survey, interviews and case analysis of beneficiary women, using 10 indicators of women's empowerment in agriculture, assessed the effect of a program-based sustainable urban agriculture intervention. 80% of beneficiary women were empowered (to a score of 0.93), while the remaining 20% were not; disaggregating the "empowered" group by intersectional differences revealed further unintended negative impacts. While urban agriculture contributed to women's empowerment, the study found that a lack of tailored support and a uniform program approach excluded segments of women beneficiaries, and it calls for a rights-based approach and feminist gender analysis to address these intersectional barriers.

· Frontiers in Sustainable Food Systems · Africa

A review of aquaponics as a means to improve food security in Africa, discussing small-scale pilots such as the SANFU project in Lagos, Nigeria.

Anjali Mistry, Manfred Spocter · · South Africa (Cape Town)

A study in a middle-class suburb of Cape Town, South Africa, investigated edible cultivation and garden waste management in domestic gardens. While potential gardening space averaged two-thirds of residential plots, 129 respondents primarily cultivated lawns, not food, with minimal vegetable production. Residents often used private gardening services for waste disposal, and on-site garden waste disposal techniques need promotion.

Akeem Ola · Town and Regional Planning · Nigeria (Ilorin)

This study examined the effects of urban planning practices on urban agriculture (UA) in Ilorin, Nigeria, and its contribution to the city's food shock resilience. Findings revealed that UA contributed 16.9% to meat/fish/egg requirements, 4.5% to yam/cassava/potato, 0.58% to vegetables, 0.6% to fruits, and 0.5% to grain requirements. However, the Respondents’ Agreement Index (RAI) indicated that poor access to finance (0.93), limited land area (0.75), and lack of tenure security (0.44) were dominant variables influencing UA's poor contribution to food security.

Nancy Karanja, Mary Njenga · · Kenya (Nairobi)

The urban agriculture efforts of Alice Wairimu and her husband Michael Macharia, who migrated to Nairobi, Kenya, are presented. They raised livestock but lost a cow during political unrest and sold the rest for hospital bills. They also attempted wastewater farming on government-owned land, which was repossessed in 2010. Subsequently, they used their meager savings to rent land nearby and continue practicing urban agriculture.

Sinead Page · · South Africa (Pretoria)

The Department of Visual Arts at the University of Pretoria aims to produce entrepreneurs in the arts, not just artists. In 2020, the first BA Fine Arts group volunteered at Moja Gabedi, a community garden in Hatfield, Pretoria. This initiative, in affiliation with Reliable House, offers a vibrant space for multi-disciplinary service-learning.

Michael Rudolph, Madimetja Antony Mello, Evans Muchesa · Journal of food security · South Africa (Johannesburg)

This study aimed to develop a sustainable social entrepreneurship model for urban farming initiatives in Johannesburg. Through a literature review and qualitative interviews with experts, findings highlighted several important challenges that limited urban smallholder farmers' ability to ensure the financial viability and sustainability of their farming initiatives. These challenges included limited accessibility to farming land, markets, funding, and knowledge regarding setting up and managing small agri-businesses.

O. O. Egbai, Emil Peter, I. A Arikpo · Journal of Critical Reviews · Nigeria (Calabar)

A survey study assessed the impact of urban agriculture on the economic livelihood of youth farmers in Calabar Metropolis, Nigeria. Information was collected from 60 youth farmers across six locations using questionnaires and purposive sampling. Descriptive and inferential statistical analyses were applied to the data. The results showed chi-square test statistics of 140.126 and 83.742 with a p-value of (p < 0.001), indicating a significant impact.

Mawuna Donald Houessou, Annemijn Cassee, B.G.J.S. Sonneveld · Sustainability · Benin

A Rapid Food Security Appraisal was conducted among 240 rural and urban dwellers in southern Benin to evaluate the effects of the COVID-19 ‘cordon sanitaire’ on food consumption. The pandemic affected food security pillars in both rural and urban areas, with the steepest decline observed among those inside the cordon sanitaire, particularly rural producers and urban inhabitants without allotment gardens. Increased food prices, logistics disruptions, and movement restrictions were cited as reasons, while access to allotment gardens effectively mitigated the crisis for households.

Nicole Paganini, Silke Stöber · The Journal of Agricultural Education and Extension · South Africa (Cape Town)

This long-term study in Cape Town, South Africa, developed and employed a co-research approach with urban farmers, using mixed methods including focus groups, farming diaries, and surveys. Participants perceived the research process itself as more important than the results, as they developed agency for change. The mutually developed results were used by co-researchers to establish a representative body advocating for small-scale farmers' needs.

Fatiha Hakimi, Mohamed Brech · Zenodo (CERN European Organization for Nuclear Research) · Africa

A survey of 50 purposively and stratified-randomly sampled farmers in the Metropolis of Rabat, Morocco, used field observation, interviews, chi-square tests and Principal Component Analysis to assess peri-urban agriculture practices. The main practices found were horticulture (fruit and vegetables), crop farming and livestock rearing (beef, sheep, poultry), contributing income, employment and food supply to the city; farmers face legal constraints — no laws regulating the activity and obligations to pay housing taxes — plus technical constraints including insufficient and costly labor, difficult irrigation access, and lack of training and technical support.

Gerelene Jagganath · The Oriental Anthropologist A Bi-annual International Journal of the Science of Man · Africa

Against a backdrop of rising poverty and food insecurity in African cities, this paper offers an overview of urban agriculture's evolving presence in two smart cities, Cape Town, South Africa, and Arusha, Tanzania. The first part sets out conceptual background on smart cities and urban agriculture in the African context, and the second provides an overview of the smart-city development of Cape Town and Arusha specifically.

Joshua Jonah Kunda, Ahmed Abubakar Jajere, E. A. Otabe, Chindo Musa Muhammed, Umar Muhammed Bibi, Yusuf Maina-Bukar · Environment and Pollution · Nigeria

This study in Makurdi, Benue State, Nigeria, used geospatial technology to assess agricultural land vulnerability to flooding, deriving factor weights (rainfall 25%, elevation 22%, slope 20%, drainage density 13%, land use/cover 12%, soil type 8%) through pairwise Analytical Hierarchy Process comparison (consistency ratio 0.078) and a weighted overlay model in ArcGIS 10.4. Farmland along the floodplains of the River Benue fell within the very highly vulnerable category, with elements at risk totaling 537.6 units of farmland (66.1%), 40.5 units of irrigation land (5.0%), and 125.8 units of built-up land (15.5%).

TP Modibedi, MMS Maake, MR Masekoameng, SS Tekana, Oluwaseun Samuel Oduniyi · African Journal of Food Agriculture Nutrition and Development · South Africa

This quantitative study surveyed vegetable consumption patterns among 254 randomly sampled urban farmers from 30 community gardens (418 registered farmers) across six large townships in Emfuleni Local Municipality, Gauteng province, South Africa. Data were collected via face-to-face semi-structured questionnaires using 24-hour dietary recall and analyzed with SPSS version 23 using descriptive statistics and ordered logistic regression. 96.1% of farmers consumed vegetables as a relish and 93.3% as salad, most often at dinner because farmers were typically present in the gardens during the day. Of 10 independent variables tested, only age group, education level, and main income source showed a statistically significant positive association with consumption patterns. The study recommends incorporating vegetables into all three daily meals and providing education on the importance of vegetable consumption.

Elizelle Juaneé Cilliers, Louis Lategan, Sarel S. Cilliers, Karla Stander · Frontiers in Sustainable Cities · South Africa

This paper investigates urban agriculture (UA) in South Africa as a citizen-led urban greening strategy, reviewing case studies and the national policy framework. Key limitations include many UA initiatives not being self-sustaining or fully citizen-driven, a cultural stigma, limited national support due to the absence of a dedicated UA policy, and South African spatial planners' limited knowledge of UA. These issues hinder the broader implementation of UA.

Kareem Buyana, Shuaib Lwasa, Denis Tugume, Paul Isolo Mukwaya, Jacqueline Walubwa, Samuel Owuor, Peter Kasaija, Hakimu Sseviiri, Gloria Nsangi, Disan Byarugaba · Environmental Research Letters · Africa

This qualitative systematic review examined academic and policy evidence to identify emerging interventions for enhancing climate change resilience in African cities. At the neighborhood scale, resilience often stems from urban agriculture and forestry, alternative energy from wastes, and adjustments in irrigation schedules. At the city scale, planning targets buildings, mobility, and energy service delivery. The review found that evidence on comparisons across regions mainly covers East, West, and South African cities, with less on Northern and Central Africa, and primarily focuses on capital cities rather than secondary cities and towns.

Gebrekiros Hagos Belay, Abrha Gebreslassie, Amanuel Teklay, Mulugeta Tesfay · Agricultural Social Economic Journal · Ethiopia

A study in Mekelle city, Tigrai, Ethiopia, investigated the commercialization of urban dairy farming, surveying 100 households using questionnaires. Results from a binary logit model showed that household head's education, family size, market distance, and total dairy products owned significantly influenced commercialization decisions. Further analysis indicated that education, extension agent visits, total dairy products, and owned land size significantly affected the extent of commercialization.

Nicole Paganini, Stefanie Lemke · Local Environment · South Africa (Cape Town)

This study, conducted from 2017 to 2019 in Cape Town, South Africa, and Maputo, Mozambique, explored urban agriculture's contributions to livelihoods and food availability through a food justice lens. In Cape Town, NGO-led urban agriculture regulated production and market access, serving wealthy consumers, with only 15% of farmers consuming their produce. In Maputo, urban agriculture contributed to local food availability, with 99% of farmers eating their produce, but farmers depended on intermediary-determined prices and faced unequal access to inputs. The study revealed stark structural inequalities and uneven power dynamics in both contexts.

Harry Kasumba, M. Mashologu, Patrick W Bwowe · · South Africa

An investigation into the sustainability of school food gardens in Chris Hani District, South Africa, used a mixed-methods approach with a purposive sample of six schools. Findings revealed significant bottlenecks hindering sustainability, specifically inadequate funding and a lack of proper planning for school food gardening activities.

Mawuna Donald Houessou, Mirte van de Louw, B.G.J.S. Sonneveld · Sustainability · Benin

To identify the main constraints to the expansion of urban agriculture (UA) in Benin, a systematic literature review, a survey among experienced urban gardeners, and in-depth interviews with stakeholders were conducted. The synthesis revealed five predominant constraints: lack of land and tenure insecurity, insufficient government support, restricted market access, limited access to productive factors, and inequality issues. Specifically, the survey indicated a political unwillingness, which was explained by the unperceived benefits of investing in UA and the lack of enforcement of urban development plans.

Michael Rudolph, Evans Muchesa, Florian Kroll · International Journal of Natural Resource Ecology and Management · South Africa

This paper reflects on key socio-economic challenges in South Africa and the role of urban agriculture in addressing health disparities and promoting ecological health. Using a structured mixed literature review and primary/secondary data, the study demonstrates the high prevalence of food and nutrition insecurity. However, it also emphasizes the positive outcomes of an integrated approach to addressing nutrition and food security, suggesting that multi- and trans-disciplinary methods based on ecological health promotion can improve food security, public health, and socio-economic development.

Brittany Kesselman, Mvuselelo Ngcoya, Daniela Casale · Agroecology and Sustainable Food Systems · South Africa

This paper, based on research from two urban gardens in Johannesburg, South Africa, argues that contemporary urban dietary norms pose a challenge to urban agroecology. The dietary norms and practices of Johannesburg residents are poorly aligned with the production requirements and outputs of urban agroecology. Lessons from other countries suggest that the benefits of agroecology could be enhanced by targeting changes in food preparation and consumption practices.