Research & reports

Alemseged Gerezgiher Hailu, daniel girmay, samuel ataklti · Discover Food · Sub-Saharan Africa

This scoping review analyzed 155 sources (2009–2024) on urbanization's impact on food security in Sub-Saharan Africa. Findings showed rapid urban expansion converted 30% of peri-urban agricultural land in some regions, increasing dependence on imported staples, and low-income households spend 60–80% of income on food. A policy gap was identified, with only 12% of countries having supportive policies and 19% of cities designating land for farming.

Nthabeleng Tamako, Joyce Chitja · Agriculture & Food Security · South Africa

This study examined the impact of climate change on urban food gardens in Sobantu and Mpophomeni townships in Pietermaritzburg, KwaZulu-Natal, South Africa. Face-to-face interviews with 103 randomly selected participants revealed that climate change disproportionately affects resource-limited urban farmers, leading to erratic rainfall, pests, and natural disasters. Elevated temperatures, shifting weather patterns, and new pests and diseases significantly impact food gardens, affecting seed and crop selection and contributing to food insecurity.

Dr. Emmanuel Omomoh, Sunday Nannim, Dr. Rogers Rengje. Danlami Gujahar, Moses Omitunde Omirinde, Gwamzhi Ponsah Emmanuel · International Journal of Latest Technology in Engineering Management & Applied Science · Nigeria (Jos)

A study analyzed urban irrigation agricultural land use changes in Jos South Metropolis, Nigeria, over a ten-year period (2014–2024) using geospatial techniques and fieldwork. Market garden area declined by 5.84%, while settlements expanded by 34.76%. Key constraints to sustainable urban agriculture were identified, including land tenure insecurity (63% of dry-season farmers were landless), limited access to irrigation water, pest and disease pressure, inadequate fertilizer supply, and increasing competition for land from urban development.

Never Assan, Justice Sibanda, Betty Mukuwapasi, Reason Rumbidzai Charachimwe, Edmore Masama · Journal of Frontiers in Multidisciplinary Research · Sub-Saharan Africa

Urban animal agriculture (UAA) in Sub-Saharan Africa is presented as a solution for food security but faces challenges including gender inequality, climate change, inadequate legislation, and environmental degradation. While UAA aims to enhance household food security and alleviate poverty, it also encounters environmental issues such as resource competition, water resource strain, improper manure management, greenhouse gas emissions, noise, and nuisance. Sustainable UAA requires semi-intensive silvopastoral and mixed crop and livestock systems to reduce environmental impact and enhance local food production.

Desalew Meseret Moges, Kristoffer Mattisson, Ebba Malmqvist, P Olsson · Environmental Challenges · Ethiopia

A study using satellite data from 2021–2024 examined urban heat and urban green space (UGS) patterns during the hot season across four Ethiopian cities. It found that UGS expanded in all cities, mainly along urban edges, and offered strong but spatially uneven cooling benefits. Daytime surface temperatures decreased, but nighttime temperatures showed mixed results, and dense central areas remained exposed to heat.

Wendpouiré Léticia Nadège Nonguierma, Jean-Marie Dipama · Afrique contemporaine · Africa

A study of the "Ceinture verte" (Green Belt) in Ouagadougou, Burkina Faso, as a nature-based response to climate adaptation. Established in 1976 and relaunched in 2018, the initiative combines forestry development with urban agriculture, aiming to contain urban sprawl, improve the local climate and strengthen the capital's resilience. The study combined a diachronic analysis of Landsat imagery from 1984-2024 with interviews of institutional actors, associative partners and direct beneficiaries. Results show significant contributions — expansion of dense vegetation in some areas, a perceived improvement in air quality, the creation of income-generating market-gardening activities, and the inclusion of vulnerable populations — but also reveal strong constraints: illegal occupations covering a significant share of the land, fragmented governance, limited access to water, security fragility, and still-limited involvement of local residents. The study discusses the feasibility of a trajectory to 2050 between an optimistic scenario conditional on structural reforms and a critical scenario underscoring current limits, and offers lessons transferable to urban adaptation policies in other Sahelian metropolises.

A. K. Ahmed, Rasheed Abiodun KURANGA, Oluwadara Latifat ISOLA-MUYIDEEN · International Journal of Research and Innovation in Social Science · Nigeria (Ilorin)

This study assessed the sustainability of environmental management practices among peri-urban rice farmers in Ilorin, Nigeria, using a sustainability index. It found that many practices were less sustainable, with 69.51% of farmers relying on chemical sprays and 69.85% using chemical fertilizers. The overall Environmental Management Practices Sustainability Index (EMPSI) for all farmers was 0.492, placing them in the moderately sustainable category.

Moçambique MANI TESE, Franscisco Monteiro Chimote, Paulo Xavier Tebulo · Revista fisio&terapia. · Mozambique

A study conducted in Quelimane, Mozambique, analyzed the procedures and challenges for ensuring advocacy for sustainable food systems. The research highlighted institutional fragmentation, the absence of urban agriculture regulation, and precarious logistics as critical obstacles. While community micro-strategies and urban gardens were identified as potential catalysts for transformation, the study concluded that strengthening local governance and multi-sectoral mobilization are fundamental.

Stella Kasiva Mbiti, Micah Makworo, Brenda Waruinu Githinji, Christine Sabwa · · Kenya

This study explored the inter-linkages of urbanization, climate change, and food insecurity in Kiambu Sub-County, Kenya. Findings show urbanization leads to dramatic land use changes, diminishing agricultural land, and exacerbated climate risks and food insecurity. The study identified institutional weaknesses, poor planning, limited regulatory frameworks, and political interference as key drivers of unsustainable urban growth and reduced food production.

S Aliyu, Okhimamhe A. A, I. M. Sule · International Journal of Research and Innovation in Applied Science · Nigeria (Lagos)

This study explored the role of urban farming in enhancing food security and sustainability in the Lagos Metropolis through focus group discussions and quantitative surveys with various stakeholders, including policymakers, urban farmers, and community members. Findings suggest urban farming's potential to reduce food transportation distances, enhance local food production, and mitigate climate change impacts. However, challenges such as land demands and gender disparities persist, necessitating integrated policy approaches and targeted educational programs.

Fuchaka Waswa, Duncan Gichabe, Ruth Kahuthıa-Gathu · Journal of the Kenya National Commission for UNESCO · Kenya (Ruiru)

This study investigated land use changes in Ruiru Sub-County, Kenya, from 1988 to 2024 using GIS. By 2024, agricultural land had decreased by 45.62%, while urban land use increased by 509%, and bare/rocky areas rose by 133% due to abandoned stone mining. The decline in agricultural land leads to reduced industrial crop areas and a shift to leafy vegetables, with an expected increase in agro-chemical use in intensive peri-urban farming.

Dauda Rotimi Awoniran, Temitayo Abayomi Adeseye, Shakirulah Olayemi Agboola, Shade Babalola · Sustainability Science and Resources · Nigeria (Lagos)

This study examined agricultural land use change in Lagos Metropolis, Nigeria, between 1984 and 2024 using Landsat satellite images and spectral indices. Findings indicated that farmlands in the study area declined by 13.03% between 1984 and 2013, and by 21.79% between 2013 and 2024. Between 1984 and 2013, 89.48% of farmlands were converted to other land uses, and between 2013 and 2024, 73.51% were converted. Normalized Difference Vegetation Index (NDVI) results also indicated a deterioration in the environmental condition of urban farmlands.

Vidjinnagni Vinasse Ametooyona Azagoun, Kossi Komi, Djigbo Félicien Badou, Expédit Vissin, Komi Sélom Klassou · Geographies · Africa

Drawing on socio-economic, techno-agronomic, and perceptual data collected from 369 growers in the Grand Nokoué region of Benin, this study combined multiple correspondence analysis (MCA) with ascending hierarchical analysis (AHA), confirmed by K-means partitioning, to identify profiles of climatic vulnerability among urban market gardeners. Three distinct vulnerability groups were identified, differing in socioeconomic, technical, and territorial characteristics and in their exposure to flooding, drought, and dry spells. The most vulnerable farmers were disproportionately young women with low incomes, limited access to land, and reliance on manual irrigation in flood-prone areas. The findings point to an uneven distribution of adaptive capacity and a need for public policies tailored to strengthen the resilience of small-scale, low-income, and land-insecure urban farmers who are exposed to these climate-related risks.

Ermias Debie · City and Environment Interactions · Ethiopia

A study in Bahir Dar, Ethiopia examined the integration of urban agriculture (UA) and green infrastructure (GI) through surveys and interviews with 99 stakeholders, supplemented by participatory observation. The main barriers to integration, based on multiple-response data, were a lack of supportive policies and regulatory frameworks (87%), limited awareness (57%), and space constraints (51%). Multicriteria decision analysis ranked integrated practices as the most effective strategy (score 16.81), followed by edible tree planting at garden centers (16.18), small gardens (13.83), and fence-edge greening (11.46). Structural equation modeling identified thermal regulation and access to fresh food as critical factors for planning sustainable urban systems.

Getachew Demissie Desta, Zeleke Gonfa Wordofa · International Review for Spatial Planning and Sustainable Development · Ethiopia

A study of the rate and direction of spatial expansion of Robe Town, Ethiopia, into surrounding rural kebeles, and its effect on the tenure security of peri-urban landholders. It combined socioeconomic data from 202 sampled household heads with spatial data from Landsat images taken in 1987, 2002, and 2020. The town grew annually by 18.6% (1984–1994), 11.3% (1994–2007), and 9.3% (2007–2020), with its total area rising from 5.1 km² in 1984 to 80.2 km², a 40.9% overall increase. Over the 33-year period, built-up area expanded fastest southward, reaching 9.91 km from the town's mean center, and grew from 4.38 km² in 1987 to 27.9 km² in 2020; about 10.2 km² of farmland was converted to built-up land between 1987 and 2020. In peri-urban areas of Robe town, 48.9% of landowners lost around half of their farmland, leaving peri-urban landowners feeling insecure about their tenure due to fear of eviction and expropriation at minimal compensation.

Nolwazi Z. Khumalo, Melusi Sibanda, Lelethu Mdoda · Sustainability · Sub-Saharan Africa

A systematic review and bibliometric analysis examined the implications of climate-smart agriculture (CSA) practices and climate adaptation strategies for food and income security in urban Sub-Saharan Africa. The review found that CSA practices boost urban food production and income, but also recognized critical challenges and trade-offs requiring urban agriculture transformation.

Jeffrey Chiwuikem Chiaka, Gengyuan Liu, Hui Li, Wen Zhang, Mingwan Wu, Zhaoman Huo, F. Gonella · Environmental and Sustainability Indicators · Sub-Saharan Africa

This study evaluated land cover change and its drivers using spatial and statistical analysis in 22 designated protected areas (PAs) across the tropical coastal regions of sub-Saharan Africa. Results indicated that food production is prevalent in these protected areas regardless of their designation, and forest loss occurred in most PAs, suggesting weak conservation. Population density was the most significant driver of land cover change, and only 15 out of 22 protected areas showed an increase in their total ecosystem service value.

Epsar Philip Kopteer, Olakunle Rufus Oladosu, Samuel Adeyemi Samson, Jasini Ali Alwadood, Olaide Monsur Aderoju, Bose Adetutu Ogwurike, Michael Nnaemeka Ihenacho, James Adah John, Philip Okoh Amodu, Nkechinyere Gift Nwagwu, Chikodili Evans Ezurike, Kamila Abba Tukur, Augustine Abah Odeh, Sumaiyat Abdullahi Kpanja, Halimat Ifedolapo Oriola, Vivian Ibrahim, Udya Aniya, Elizabeth Rizga Jackson, Kikelomo Oluwabukola Adebo · World Journal of Advanced Research and Reviews · Nigeria (Jos)

This study investigated the economic impact of urban flooding on agricultural activities along the Dilimi River in Jos North LGA, Plateau State, Nigeria, using a 2021 satellite image and GIS analysis. The study found that loss of farmland, hunger and starvation, loss of properties, and high incidence of poverty were perceived as serious economic impacts of floods on farmers. Agricultural land use covered 2.82% of the study area.

Jean de Dieu Minengu, Aiko Ikonso Mwengi, Romain Kawanga, Simon Mwengi, Oscar Mangunda Yama · Revue Africaine d’Environnement et d’Agriculture · Africa

Market gardening in Kinshasa's urban and peri-urban areas faces multiple constraints, including land insecurity, low natural soil fertility, the incidence of diseases and pests, weak technical support, climate hazards, poor input supply, and problematic marketing systems. These constraints limit yields in production sites and hinder the development of market gardening activities.

ke Chinelo Gloria, Eze H.C, Obasi C.J, Euphemia Afoma Ikegwuonu, Okonkwo Ngozi Nonyelum · International Journal of Research Publication and Reviews · Nigeria

To evaluate the water quality of the Obibia River in Amawbia, Anambra State, Nigeria, water samples were collected monthly and assessed for bacteriological and physicochemical parameters. The study identified multiple bacterial isolates, including Escherichia coli, Klebsiella pneumoniae, Salmonella enterica serovar Typhi, and Vibrio cholerae. Notably, E. coli, S. Typhi, and V. cholerae were frequently observed in both rainy and dry seasons. These findings suggest the necessity of adequate treatment before use and periodic evaluation of the water's quality for drinking and urban agricultural purposes.

F.E. Awoyelu, R.A. Mebo · Agro-Science · Nigeria (Osun State)

This study assessed the effects of artisanal sand mining on peri-urban agriculture in Ife East and Ife Central Local Government Areas, Osun State, Nigeria, from 2015 to 2019. Data from 120 respondents (landowners, cultivators, residents) showed that cultivated land area decreased by 24.8% (from 48% to 23.2%), while sand-mined area substantially increased by 20.4% (from 14.6% to 35%). Landowners' decision to part with land for sand mining increased with age, household size, and farming as primary occupation, but decreased with higher education levels.

Bismark Osei, Mark Edem Kunawotor, Paul Appiah-Konadu · International Journal of Social Economics · Africa

This study examined measures for achieving a sustainable environment to mitigate climate change in 54 African countries from 2000 to 2020, using panel data and a Cox proportional hazard model. Findings indicate that carbon farming, rooftop gardens, and renewable energy positively contribute to a sustainable environment. However, governance adversely affects the objective of achieving a sustainable environment.

Abrham Kassa Ejigu, Kumelachew Yeshitela · Frontiers in Sustainable Cities · Ethiopia (Arba Minch City)

A study assessed Arba Minch City's governance capacity to integrate resource-oriented sanitation technology with urban agriculture. The findings indicated that the city's capacity is hindered by a lack of systematic monitoring, fragmented policy tools, and inadequate public sector participation. There is no single government body responsible for integration, and a behavioral gap exists among users in adapting to new technologies and recovered organic fertilizer.

Merishca Naicker, Denver Naidoo, Mjabuliseni Simon Cloapas Ngidi · African Journal of Inter/Multidisciplinary Studies · South Africa

This mixed-methods study surveyed 120 community garden participants in Ward 18, Umdoni Municipality, South Africa, to assess the impact of community gardens on household food security. The survey found that 58.3% of participants did not receive sufficient food from the gardens, and only 15.8% achieved food security, with 40% experiencing moderate food insecurity. Despite their establishment, community gardens appeared ineffective in substantially improving household food security, with challenges including climate change impacts.

Abigail Benson, NICHOLAS O EHISIENMHEN, EUNICE T ADEWALE, R ANIMASAHUN-OLADIMEJI, TOBA R ARIBILOLA, RAZAQ A AFIZ, Augustine Okeke, Oliver P. John, Idris Ahmad Isa, BADRAT O IMRAN, KELVIN D DIRISU, OMOTOYE O OMISORE · Greener Journal of Agricultural Sciences · Nigeria (Ondo State)

This study assessed the impact of urbanization on agricultural land in Akure South Local Government Area, Ondo State, Nigeria, using populated figures and land use data from satellite images for 2002, 2012, and 2022. GIS analysis revealed an increase in settlement and a decrease in agricultural land from 2002 to 2022. Urbanization significantly decreased agricultural land, farming activities, and farm size, driven by increasing settlement and built-up areas.