Research & reports

Kissoly L. · Frontiers in Sustainable Food Systems · タンザニア・ダルエスサラーム

An exploratory qualitative case study and policy analysis of urban agriculture's current landscape and possible futures in rapidly urbanizing Dar es Salaam, drawing on targeted literature and document review, a policy and regulatory scan, and 52 key informant interviews with municipal actors, urban farmers and food-system practitioners conducted between April and September 2025. Urban agriculture is valued for household food supplementation, small-scale income and fresh-food provisioning through short-cycle vegetable production close to consumers, but remains shaped by tolerated informality, insecure land access, fragmented regulation, contamination risks, weak institutional coordination and pressure on peri-urban land. Five evidence-informed trajectories are proposed — managed river-corridor cultivation; sacks, buckets and roofs for dense-ward micro-production; institutional land clusters; peri-urban foodshed belts with circular-resource hubs; and small-scale aquaculture with insect-based feed — presented explicitly not as tested feasibility models but as differentiated options requiring further technical, environmental, spatial and economic assessment. The paper argues the future depends not on a single large-scale model but on risk-sensitive, institutionally grounded forms of support.

Olabode K., Lewińska K., Komorowicz I. · Environmental Geochemistry and Health · ポーランド南部・ズウォティストク（旧鉱山地域）

Quantifies total arsenic, gastric-phase in vitro bioaccessible arsenic (IVBA) and direct-soil-exposure risks for children and adults in mining-affected allotment gardens in Złoty Stok, southern Poland, applying deterministic calculations and Monte Carlo simulation to incidental soil ingestion, dermal contact and inhalation of resuspended particles. Total As ranged 433–1148 mg/kg and IVBA 4.5–23.5%. Under the total-As multi-pathway scenario median hazard indices were 5.50 for children and 0.62 for adults (P05/P95: 2.26/15.18 and 0.29/1.89). Median total cancer risk was 1.78×10⁻⁴ for children and 1.06×10⁻⁴ for adults, with 80.0% of simulated child profiles and 54.0% of adult profiles at or above 10⁻⁴. Ingestion and dermal contact accounted for nearly all modeled risk while inhalation was negligible; applying IVBA to the ingestion pathway alone cut the median ingestion-related hazard quotient and cancer risk by 89.3%. Total soil As and soil ingestion rate were the principal positive risk drivers, body weight inversely associated.

Coyne D., Nyambura E.I., Atandi J.G., Obebo F., Alam M.J., Kumar S., Arro E.A., Adimassu Z., Bihon W., Schreinemachers P. · Frontiers in Sustainable Cities · エチオピア・アディスアベバ／ケニア・ナイロビ／バングラデシュ・ダッカ／フィリピン・メトロマニラ

A comparative multi-city case study of urban and peri-urban vegetable seedling systems — a neglected component of urban agriculture — in four rapidly growing cities: Addis Ababa, Nairobi, Dhaka and Metro Manila. Data came from 154 stakeholders including urban farmers, nursery operators, seedling suppliers, agro-input dealers and government officers, complemented by secondary literature. Across all four cities urban vegetable production was dominated by small-scale intensive systems growing predominantly leafy vegetables, while seedling systems remained underdeveloped: informal nursery operations, weak quality assurance, open-field propagation, limited technical capacity and fragmented market linkages, driving widespread reliance on direct seeding and low-quality planting material despite strong demand for quality seedlings. Identified opportunities include improved propagation technologies, certification systems, digital marketing, commercialization of indigenous vegetable seedlings and stronger public-private partnerships. As one of the first cross-continental assessments of urban vegetable seedling systems in low- and middle-income countries, it positions seedling systems as a critical but overlooked part of resilient, nutrition-sensitive urban food systems.

Johne P., Rao Bangady Killur R. · Soil and Sediment Contamination: An International Journal · Papua New Guinea

An assessment of trace metals in the soils of peri-urban food gardens at Lae, Papua New Guinea's second city and its main industrial centre, and of the ecotoxicological risk they pose. The subject — food growing on the fringe of an industrial city — is barely documented anywhere in the South Pacific. Published online 28 June 2026; the publisher does not make the abstract openly available, so only the study's scope is recorded here.

Huq F.F., Deacon L. · Discover Sustainability (Springer), 6:696 · Global

A systematic review of 37 studies examining how community gardens affect food access, urban resilience, and community well-being, with research interest peaking during the COVID-19 pandemic. It identifies inequitable access and weak policy integration as key barriers and calls for inclusive, interdisciplinary, long-term planning.

· Frontiers in Sustainable Food Systems · Global

A thematic review synthesising global trends, innovations, governance frameworks and pathways to sustainability in urban agriculture, mapping the field's current state and future directions including citizen participation, policy support and environmental challenges.

Neumann V., Schmid B., El Benni N., Finger R. · Land Use Policy · Switzerland

Survey of 500 members of community-supported agriculture and allotment gardens in Switzerland showing social capital has a significantly positive effect on members' perceived benefits, highlighting the social value of collective urban food production.

Langerman S., Juarez N., Magan I. M. · Journal of Urban Health 102:857-871 · Global

Scoping review of 42 studies (1990-2024) on urban agriculture interventions for refugees and immigrants, identifying five domains (well-being, physical health, ecological, economic, sociological), with social outcomes most common.

Zhang Y., Chen T., Gasparri E., Lucchi E. · Sustainability (MDPI), 17(2):666 · Australia (Sydney)

Proposes a modular agrivoltaics building envelope that physically integrates thin-film PV and hydroponic farming into the building skin itself, rather than treating solar and agriculture as separate systems. Using a circular design approach with multi-objective optimization of energy, light, water and structure (case study: Sydney), it extends food-plus-energy production from rooftops to walls and facades, highlighting space-utilization and system-integration gains for net-zero urban architecture.

Mallick S., Paul S., Rout S., Behera R.N. · Frontiers of Urban and Rural Planning (Springer) · Global

A quantitative systematic review of five decades of peri-urban research, mapping its growing integration into urban planning and the diversity of its definitions, and positioning peri-urban agriculture's contribution to sustainable planning as a future direction.

Tesfay S.M., Alem G., Ayele D.G. · Land (MDPI) 14(7), 1483 · Global

Theoretically revisits peri-urban land transformation in the Global South, organizing the change in agricultural land use around three vectors: capital, governance and revival (return to farming).

Yuan X., Hu J., Marcelis L.F.M., Heuvelink E., Peng J., Yang X., Yang Q. · Horticulture Research (Oxford Academic) · Global

Systematizes the economic and environmental effects of innovation in plant factories and vertical farms, estimating future profitability improvements under a clean-energy transition and showing the feasibility of zero-food-mile production within cities.

Fei S., Wu R., Liu H., Yang F., Wang N. · Horticulturae (MDPI) 11(2), 212 · Global

Systematizes technological innovations in metropolitan urban and peri-urban agriculture (IoT, AI, vertical farming, hydroponics) as pathways to sustainable food systems, including comparison with rural farming technology.

Ashikuzzaman M., Swapan M.S.H., Zaman A.U., Song Y. · Landscape and Urban Planning · Bangladesh (Dhaka)

Analysis of 187 YouTube videos reveals urban rooftop farming in Dhaka is a growing grassroots movement with fragmented institutional oversight; farmers in mixed land-use neighborhoods show the strongest motivation and seek government policy guidelines.

Schreinemachers P., Kumar S.S., Uddin M.N. · Food Security · Bangladesh (Dhaka)

Panel data from 679 households across four Dhaka metropolitan city corporations shows that promoted urban home gardens significantly improved vegetable production and consumption, with 85% of participants being women.

Yapp E.H.T., Jamil N., Lee L.S.G., Chooi Y.T., Chen C.O. · Cogent Food & Agriculture, Vol. 11, Article 2448601 · Malaysia (Penang, Johor, Sabah)

A qualitative study using semi-structured interviews with urban farmers in Penang, Johor, and Sabah found that hydroponic and vertical farm operators face persistent challenges from government regulations, volatile markets, financial constraints, and environmental factors despite existing subsidy programs.

Liu Y., Chanse V., Chicca F. · Urban Science (MDPI), Vol. 9, No. 8, Article 305 · New Zealand (Wellington)

This study quantifies Wellington, New Zealand's community gardens' capacity to meet post-disaster vegetable demand in terms of weight and nutrient content, finding current gardens insufficient alone but identifying substantial potential through expanded urban agriculture land use.

Ranalli et al. · Journal of Applied Ecology · Global (urban ecosystems)

2025 research on how urban agriculture and urban planning enhance pollinator habitats in changing landscapes. Urban environments offer benefits to pollinator communities: lower pesticide use, greater variety of floral resources, and increased landscape heterogeneity. Urban agriculture serves as a pollinator reservoir and source area for adjacent rural regions, contributing to food security, poverty alleviation, and pollinator conservation.

Xue Y., Yan J., Mohsin M., Mehak A. · Frontiers in Sustainable Food Systems · Global

Comprehensive analysis of economic vulnerabilities in agri-food supply chains and mitigation approaches through local food system strengthening, highlighting role of urban agriculture.

· Sustainability, Vol. 17, No. 19 · Global

Published September 26, 2025. Explores multifunctional role of vertical farming systems in climate adaptation and urban food system transformation. Examines coexistence with existing and planned blue-green urban infrastructure. Analyzes how vertical farming technologies contribute to urban resilience and sustainability.

(Open Research Community) · ResearchGate, Discover Sustainability (Springer Nature) · Global

2025 review article examining urban agriculture's contribution to food security and mechanisms of achievement. Analyzes through empirical evidence the benefits and challenges, income generation effects, and improvements in fresh food access for low-income households.

Thompson, R., Climate & Food Security Research Initiative · Agriculture · Global

Analyzes urban agroecology as a key strategy to build climate-resilient communities and strengthen urban food systems. Examines multifaceted impacts of community-based agricultural practices on biodiversity conservation, local food security, and climate adaptation. Includes comparative case studies from Global South and Global North perspectives.

· AgriEngineering · Global

Designs and implements a low-cost modular growth chamber as an accessible alternative to expensive commercial equipment. It integrates thermal insulation, LED lighting, forced ventilation, a recirculating irrigation system with double filtration, and Arduino UNO-based environmental monitoring.

· International Journal of Environmental Science and Technology · Global

Proposes a household-scale vermicomposting bin using Perionyx excavatus to both treat domestic organic waste and grow vegetables; adding a ventilation pipe improved performance.

· Scientific Reports · Global

Compares different bulking agents for speeding up the composting process of household kitchen waste.