Research & reports

Folorunso E. A., Schmautz Z., Gebauer R., Mraz J. · Heliyon 9(8):e18979 · Nigeria

Evaluates the profitability of ten small- and medium-scale commercial hydroponic farms using NPV, IRR, benefit-cost ratio and sensitivity analysis, finding larger farms more profitable but viability highly dependent on retail prices, crop choice and market size.

Adeline Ngie, Nobukhosi Sithole · Urban Agriculture & Regional Food Systems · South Africa (Johannesburg)

A study in Johannesburg, South Africa, assessed urban transformational strategies, including rooftop gardening and hydroponic farming, aimed at improving food security and regenerating infrastructure. Using open-ended interviews with stakeholders, findings indicated improved household food security and income generation, but challenges such as soil and water flow for rooftop gardens persist. Hydroponics faced hurdles like energy supply and input costs, though it showed more promise for land and water resource efficiency.

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.

Chinwe Okonkwo, Ifeoma Nwachukwu, Adebayo Adeyemi · Zenodo (CERN European Organization for Nuclear Research) · Nigeria (Ibadan)

This systematic review synthesized evidence on the determinants of adoption and disadoption of improved cassava planting material (ICPM) by peri-urban smallholders in Ibadan. The review found that disadoption rates can exceed 40% within three seasons post-initial adoption. Perceived Usefulness was the strongest adoption predictor, while Perceived Ease of Use was often compromised by logistical barriers, and vendor trust influenced continued use.

Peter Sanjo Adewale, Sunday Clement Olubunmi Makinde, V. Kusemiju · Journal of Environment and Sustainable Development · Nigeria (Lagos)

This mixed-method study in Lagos State, Nigeria, examined the effects of Urban and Peri-urban Vegetable Production (UPVP) on farmers' livelihood subscales using a Household Livelihood Survey and Focus Group Discussion. The findings indicate that all livelihood subscales (Physical, Natural, Financial, Social, Human) were positively and significantly impacted by UPVP, with a moderately high overall impact. The study concludes that UPVP can be a resilient sector for the economy and sustainable development.

Navjot Sangwan, Luca Tasciotti · Agriculture · Sub-Saharan Africa

This cross-country study analyzed household data from nine Sub-Saharan African countries to investigate the impact of urban agriculture (UA) on household food expenditure and dietary diversity. Using an inverse-probability weighted regression adjustment method, the study found that households engaged in UA reduced overall food expenditure and increased spending on protein-rich foods like nuts, legumes, fruits, dairy, meat, and poultry. The impact of UA varied substantially across the food expenditure distribution.

Mohammed Seid Ebrahim · Ethiopian Journal of Business and Social Science · Ethiopia (Addis Ababa)

This study examined factors affecting the growth of micro and small enterprises in Gulele Sub-city, Addis Ababa, Ethiopia, using survey data from 120 enterprise leaders/owners. Enterprises grew at a rate of 0.20, but growth trends varied across sectors including urban agriculture. The analysis found that age, gender, and work experience of leaders/owners, along with enterprise age, employee numbers, workplace suitability, marketing problems, and government policies, significantly influenced growth, indicating that cumbersome bureaucratic procedures contributed to undergrowth and stagnation.

O.M. Seretse, Abhishek Agarwal, Ulaula Mmiletsi, Mbizo Mpho · Advances in Modern Agriculture · Sub-Saharan Africa

This study designed a cost-effective, two-row donkey-drawn maize planter for small-scale farms in Sub-Saharan Africa, particularly Botswana, where donkeys are a primary power source. The assembled planter weighs 48.93 kg, can be drawn by three donkeys, and has an estimated cost of 200 USD. The study notes limitations and calls for further research to assess performance under varying soil conditions, durability, and planting efficiency.

Jade Morkel, Noxolo Dumani, Nick Malherbe, Shahnaaz Suffla · Community Development · South Africa

This case study, conducted in a low-income South African community, explored how a community gardener engages with the social solidarity economy (SSE) using thematic analysis of triangulated data from an interview, participant observation, and a participatory film. The study analyzed how the community garden fostered solidarity and established alternative micro-economic practices. It also considered challenges facing community gardens when connecting with the SSE.

Oluwakemi Adeola Obayelu, Adenike Omotola Ajibobare, Abimbola O. Adepoju, Abolupe Oluyemi Ayanboye · CABI eBooks · Nigeria (Ibadan)

This study assessed the perceptions of youths (aged 18-35 years) about urban agriculture and factors influencing their participation in Ibadan metropolis, Nigeria. Data analyzed using descriptive statistics, Likert analysis, and logit regression showed that 38.8% of youths participated in urban agriculture, and access to urban farmland, being a married male, and older youth increased the likelihood of participation. Conversely, longer market distance, higher formal education, and poor access to credit and land reduced participation.

Tinashe P. Kanosvamhira, Alexander Follmann, Daniel Tevera · Geographical Journal · South Africa

This mixed-methods study examined 34 urban community gardens in Cape Town, South Africa, to assess their capacity to function as urban commons across six areas: infrastructure, inputs, land, produce, labour, and immaterial components. Findings demonstrated that while these gardens counter neoliberal privatization and individualization, their capacity to function as urban commons is significantly curtailed by their entrenchment within the neoliberal context.

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.

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.

Mulugeta Chane Wube, Heena Atwal · Journal of Innovation and Entrepreneurship · Ethiopia

This study, conducted in the Amhara National Regional State, Ethiopia, examined the integrated effect of the entrepreneurial ecosystem's political-legal subsystem on the performance of Micro and Small Enterprises (MSEs) and the mediating role of entrepreneurial competence. A sample of 499 MSE operators engaged in manufacturing, construction, and urban agriculture was selected. While the political-legal aspects significantly impacted both entrepreneurial competency and MSE performance, the relationship between entrepreneurial competencies and MSE performance was found to be insignificant. The mediating role of entrepreneurial competency in the relationships between policy and business performance and other business environments and business performance was also shown to be insignificant.

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.

Amare Molla Dinku, Tefera Chane Mekonnen, Getachew Shumye Adilu · Heliyon · Ethiopia

A mixed-methods study conducted in Dessie and Combolcha cities, north-central Ethiopia, surveyed 506 resident households to measure the status of food insecurity in urban food systems. The study confirmed that 33.1% of respondents were food insecure, with nine and six individuals per 100 people forced to 'sleep hungry' and 'not eat in the whole day and night' respectively. Household food insecurity was significantly associated with the gender of the household head, participation in casual labor, and living house ownership, and the degree of food insecurity was deemed higher due to weak food system governance, an inconsistent food supply chain, and socio-economic and gender inequalities.

Gareth Haysom, Jane Battersby · Palgrave studies in agricultural economics and food policy · Africa

Based on findings from cities in five African countries, this study argues for a re-framing of urban food system resilience. It contends that the urban system, specifically infrastructure, shapes the functioning of the food system and consumers' ability to use it, and that the agency of urban food system users needs inclusion in understandings of, and efforts to increase, food systems resilience.

Nicolette Tamara Jonkman, Karsten Kalbitz, Huig Bergsma, Boris Jansen · Land · Africa

This case study investigates the relationship between prior land use, current management, and soil quality at six urban agriculture (UA) sites in Kisumu, Kenya, and Ouagadougou, Burkina Faso. A soil survey determined the soil macronutrient and mineral composition. Results indicate that three UA sites predate surrounding urban development, and soil nutrient data suggest these sites were likely chosen for their soil.

Endris Assen Ebrahim, Ahmet Toy, Yissa Hassen Kassim · Frontiers in Sustainable Cities · Ethiopia

A survey of 218 randomly sampled micro and small-scale enterprise (MSSE) managers/owners across manufacturing, trade, construction, service, and urban agriculture sectors in Dessie Town, Ethiopia, used self-administered questionnaires and stratified random sampling to identify determinants of enterprise growth. Of nine candidate factors, statistically significant associations with MSSE growth and performance (at the 5% level) were found for political/legal factors, management, market conditions, technology, infrastructure, entrepreneur-related factors, and the COVID-19 pandemic.

Habtamu Serbessa · International Journal of African and Asian Studies · Ethiopia

This study examined how vegetable production supplements food and income for residents of urban Addis Ababa, Ethiopia, using household-level quantitative data analyzed with descriptive and inferential statistics. Of respondents, 99.2% said vegetable production provides fresh food for their households, 41.9% earned up to 10,000 birr per production cycle, and 30.7% of producers hired up to ten employees, with seeds and pesticides being the more expensive inputs; multivariate analysis found households earning around 10,000 birr per production cycle were significantly affected by farming in residential areas (p = 0.008), and households were found to prioritize food consumption over profiting from sales.

Zimmer A., Guido Z., Davies J., Joshi N., Chilenga A., Evans T. · Urban Transformations (BioMed Central) · Africa

Demonstrates that African secondary cities function as connection points between rural and urban food systems, evaluating mid-size cities as intermediate nodes for food distribution, processing and market formation.

Ejigu N., Sitotaw B., Girmay S., Assaye H. · International Journal of Food Science · Ethiopia

Evaluates water hyacinth biomass, alone or mixed with wheat/teff straw, as a low-cost substrate for oyster mushroom cultivation. The authors conclude water hyacinth is a promising cheap substrate owing to its ideal C/N ratio and low lignin, while also helping control the invasive weed.

Gumisiriza M.S., Ndakidemi P., Nalunga A., Mbega E.R. · Sustainable Cities and Society · Africa

A cost-effectiveness analysis (net present value, internal rate of return, payback period) of a small-scale non-greenhouse vertical hydroponic system, examining its contribution to urban food security.