Research & reports

Karen Botes, Christina Breed · Land · South Africa

In the Melusi informal settlement of Tshwane, South Africa, researchers used a mixed-methods approach -- semi-structured questionnaires, focus group interviews, and photo-elicitation, analyzed with SPSS and Atlas.ti -- to examine socio-cultural perceptions of modular living wall systems planted with African vegetables as a way to enhance household food security. Key barriers to urban agriculture identified included high maintenance costs, pest control problems, spatial constraints, exposure to extreme weather, and limited access to water and fertilizer, while the community supported living walls with African vegetable crops for their space-saving and biophilic value, with success depending on low-tech, cost-effective, modular systems built from recycled materials using nutrient-dense, compact crops.

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.

Verheyden, Johan G.L. · Zenodo (CERN European Organization for Nuclear Research) · Africa

This literature review examines the intersection of urban and peri-urban agriculture (UPA) and climate-smart agriculture (CSA) in the Great Lakes region of Africa — Kenya, Rwanda, Uganda and the Democratic Republic of Congo — a region undergoing rapid urbanization amid growing climate change vulnerability. It examines how CSA practices such as agroforestry, composting, water-efficient irrigation, and resilient crop varieties are being adopted and adapted within diverse UPA systems, synthesizes evidence on their impacts on food security, nutrition, environmental sustainability and socio-economic wellbeing, and analyzes the governance, policy and institutional factors enabling or constraining uptake. The review identifies critical research gaps, including the need for long-term impact assessments, locally adapted CSA strategies, effective governance models, and a better understanding of land tenure and nutritional outcomes, and outlines future research directions and policy recommendations with particular attention to Kenya's evolving urban landscape and devolution framework.

Goshu Desalegn, Anita Tangl, Mária Fekete‐Farkas, Girma Gudisa, Anita Boros · Heliyon · Ethiopia

A study of micro and small enterprises in Ethiopia showed that government policies and regulations have an insignificant direct effect on urban agriculture. However, sustainable finance plays an important mediating role between urban agriculture and government policies, indicating that the impact of government policies and regulations on urban agriculture is indirect.

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.

Ayodele O. Adelana · LAUTECH Journal of Engineering and Technology · Nigeria

This research quantified urban soil infiltration rates at 88 locations in Akure metropolis, southwest Nigeria, and assessed the effectiveness of Horton and Green-Ampt infiltration models. While Akure's urban soils showed high infiltration rates, both models poorly compared to measured rates, consistently underestimating urban soil infiltration. The models' largely below-average performance suggested that projections from them are less reliable for urban soils.

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.

Tinashe P. Kanosvamhira, Mohamed Deen Shade · Local Environment · South Africa (Cape Town)

This study examined how 34 urban community gardens in low-income neighborhoods of Cape Town, South Africa, contribute to environmental justice using a mixed-methods approach including remote sensing, interviews, and observations. Findings revealed an unequal distribution of green spaces between wealthier and less affluent neighborhoods. While current gardening benefits may not be widespread, the gardens offer advantages such as environmental education, promotion of agro-ecological practices, and land use for green purposes.

Mamush Masha, Elias Bojago, Innocent Ngare · Discover Sustainability · Ethiopia

This study investigated the factors influencing the adoption of urban agriculture (UA) as climate-smart agriculture (CSA) practices and its impact on food security in Wolaita Sodo City, South Ethiopia. Data from 384 randomly selected urban households showed that 53.53% adopted UA, with significant differences between adopters and non-adopters in employment, UA attitudes, and household size. A logistic regression model identified family size, home ownership, household head's occupation, UA perceptions, market demand, and access to training as determinants of adoption. Propensity score matching confirmed that UA adoption significantly improved food security by 0.685-fold.

Fedila Chumgicho · National Academic Digital Repository of Ethiopia · Ethiopia

This descriptive study assessed the impacts of urban agriculture on the environment in Tora town, Silte Zone, Central Ethiopia, using a mixed-methods approach with 204 systematically selected samples and 10 purposively selected key informants. Findings revealed that 41.2% of urban residential households were engaged in farming. The study underscored positive impacts such as sustainable waste management, organic waste utilization, and the adoption of sustainable agricultural techniques, while also identifying challenges like water-related issues and sustainable waste disposal.

Kebede Tedila Tadesse · Journal of Food Technology & Nutrition Sciences · Ethiopia

This systematic review, conducted at Debre Berhan University, Ethiopia, assessed the role of horticulture in adopting climate-smart agriculture (CSA). Ethiopia's agriculture, which is the backbone of its economy, is adversely affected by climate variability and extreme events. CSA is presented as a primary solution to sustainably increase productivity, enhance resilience, reduce greenhouse gas emissions, and achieve food security. The principles of horticulture, including urban and peri-urban agriculture, silviculture, and agroforestry, are highlighted as having a strong capacity to adopt CSA.

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.

Terusaw Solomon, Kumelachew Yeshitela, Wondmagegn Taye Abebe · Discover Water · Ethiopia (Addis Ababa)

This study assessed the effectiveness of a vetiver grass floating treatment wetland in reducing irrigation water pollution at the Mekanisa-Gofa-Lafto Cooperative farm in Addis Ababa, Ethiopia. After a 7-day treatment, the wetland reduced BOD (73.68%), COD (73.92%), pH (0.39%), Chloride (43.12%), Total Hardness (66.56%), and TSS (96.21%), approaching recommended irrigation water quality guidelines within 3 days. However, Electro Conductivity (22.2%) and Sodium (15.2%) concentrations increased, exceeding recommended values.

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.

Mekonnen Amberber Degefu, Fantu Kifle · Climate Services · Ethiopia

This study examined the impacts of climate variability on vegetable production among 156 randomly selected vegetable farmers along the little Akaki River in Addis Ababa, Ethiopia. Climate data from 1996 to 2020 and farmer perceptions revealed high coefficients of variation for monthly and annual precipitation. Farmers perceived increased floods/rainfall (44.9%), drought frequency (13.5%), temperature (89.7%), and decreased vegetable productivity (86.5%). High precipitation and temperature variability negatively affect vegetable productivity, with nonadaptation (36.5%) also reported as an adaptation option.

Cynthia Nneka Olumba, Eberechukwu Johnpaul Ihemezie, Chukwudi Charles Olumba · Climate and Development · Nigeria

This study aimed to understand urban farmers’ perceptions of climate change and the adaptation constraints they encounter in Anambra Metropolis, Nigeria. Household survey data using structured questionnaires showed that most urban farmers perceived climate change through effects such as increased weed infestation, drying up of streams/rivers, and decreased soil moisture. Principal adaptation constraints were diverse, falling within broader institutional, information, and financial categories. The study revealed that the socioeconomic conditions of urban farmers in developing countries pose a threat to urban agriculture's potential to mitigate climate change.

Odera Chukwumaijem Okafor, Pamela Ogochukwu Mgbenwelu · Trends in Agricultural Sciences · Nigeria

This study investigated the impacts of urban agriculture on the environment of Awka, Anambra State, Southeastern Nigeria, using a multi-stage sampling process and analyzing data with descriptive statistics and Spearman's Correlation Coefficient. Findings showed that urban agriculture significantly contributes to the well-being of some city residents by providing revenue, employment, food security, and poverty reduction. The study concluded that urban agriculture should be viewed as a lucrative commercial activity.

Yosef Abebe, Mulugeta Gashaw, Asenake Kefale, Tim Brewer · Water Reuse · Ethiopia

A study on wastewater governance in the upstream catchment of the Awash Basin, Ethiopia, found that untreated wastewater discharged from industries is polluting rivers and the surrounding environment. Regulatory bodies have done little to enforce rules and directives for wastewater regulation, and due to poor implementation of laws, urban agriculture is expanding without concern for its negative health and socioeconomic impacts.