Research & reports
Peer-reviewed research and reports on community urban agriculture, food education, composting, welfare and more.
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Critical findings
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Phenotypic Characterization of Salmonella and Escherichia coli Strains Isolated from Wastewater and Market Gardening Crops Along the River Chari in N’Djamena, Chad
2026Djim-adjim Tabo, Fissou Henry YANDAI, BONGO NARE Ngandolo, GRANIER Sophie, ABAKAR Brahim, MILLEMANN Yves · European Journal of Nutrition & Food Safety · Chad
A study in N'Djamena, Chad, isolated Salmonella and Escherichia coli from wastewater discharged into the Chari River and from market garden crops irrigated with it. E. coli was found in 29.66% of wastewater samples and Salmonella sp. in 19.49%, with raw vegetables showing very high contamination. Wastewater results exceeded WHO standards, indicating that re-use of this wastewater for market gardening is not recommended due to significant contamination risks.
Contamination & food safetyHealthPotentially Toxic Elements in Foods Consumed in Uganda: Occurrence, Dietary Exposure, and Public Health Risks
2026Gabson Baguma, Gadson Bamanya, Allan Gonzaga, Hannington Twinomuhwezi, Barnabas Mubangizi, Eric Niringiyimana · Pollutants · Uganda
This review synthesized literature on the occurrence of cadmium, chromium, nickel, lead, and arsenic in foods consumed in Uganda. Contamination was concentrated in mining-influenced agricultural areas, wastewater-irrigated farms, municipal dumpsites, industrial corridors, and urban food markets, with vegetables, cereals, livestock products, fish, and street-vended foods exhibiting the greatest contamination burdens. Lead and cadmium most frequently exceeded WHO/FAO, Codex Alimentarius, and Ugandan food safety limits, and children consistently showed higher dietary exposure than adults.
Contamination & food safetyHealthUrban–rural linkageEarly Detection of Escherichia coli Producing Extended Spectrum Beta Lactamase (ESBL) in Cattle Farm Waste from Urban Jakarta
2026Aulia Maulida, Syafitri Jumianto, Riris Lindiawati Puspitasari, S.Si., M.Si · Prosiding Seminar Nasional Pemberdayaan Masyarakat (SENDAMAS) · Indonesia (Jakarta)
This study examined cattle manure from an urban farm in South Jakarta for the presence of Escherichia coli resistant to third-generation cephalosporins. Using total plate count, selective culture, Gram staining, and biochemical identification, presumptive ESBL-producing E. coli strains were detected. Bacterial growth on cefotaxime-supplemented media indicated phenotypic resistance, demonstrating that urban cattle manure may serve as a reservoir of antibiotic-resistant bacteria.
Contamination & food safetyHealthOrganic cycleEvaluating a Healthcare Rooftop Garden: Post-Occupancy Insights into Evidence-Based Design Processes and Governance Considerations
2026Nina Oher, Anna Bengtsson, Patrik Grahn · Land · Global
This study aimed to understand the evidence-based design process behind a rooftop garden at an urban Memory Clinic. Through focus group interviews with healthcare professionals and an interview with the landscape architect, findings showed that while the garden exceeded expectations regarding aesthetics, restorative qualities, and staff use, it was not used for patient-oriented therapeutic activities as intended. This divergence was linked to governance issues such as organizational change, loss of key actors, insufficient documentation of design intentions, procurement disruptions, shifting clinical priorities, and maintenance arrangements.
Governance failureHealthCommunityPolicyDigestate biochar effects on soil Pb bioaccessibility, crop Pb concentrations, and human health risk in urban vegetable agroecosystems
2026Jennifer Newell, Rory Doherty, Gary Lyons, Siobhan F. Cox · Environmental Geochemistry and Health · Global
A controlled experiment investigated the effects of 5%w/w digestate biochar on lead (Pb) ingestion risks in urban vegetable agrisystems with varying soil Pb concentrations, high pH, and organic matter. Biochar significantly reduced soil-derived Pb ingestion risks in some systems but had no effect on vegetable-derived Pb ingestion risks for any agrisystem. Overall, biochar showed limited and variable effects on reducing Pb ingestion risks, suggesting its remediation potential is context-dependent and may offer limited protection in soils with elevated pH and organic matter.
Contamination & food safetyHealthOrganic cycleBelo Horizonte’s Right-to-Food Model
2026Hoyoon Jung · The International Journal of Social Sustainability in Economic Social and Cultural Context · Brazil (Belo Horizonte)
This study analyzes Belo Horizonte, Brazil's right-to-food model, which has reduced hunger and promoted social equity through integrated food policies like subsidized food programs and urban agriculture. Despite its successes, the model faces challenges in policy sustainability, financial constraints, and political continuity, and the study notes limitations including reliance on secondary data.
Governance failureFood sovereignty & justicePolicyHealthEconomicsFood-based interventions to mitigate household food insecurity in Canada: a systematic review
2025Leanne Idzerda, Calin Lazarescu, Tricia Corrin, Eric Vallières, Alix Couture, Sara Khan, Lynn McIntyre, Valerie Tarasuk, Alejandra Jaramillo Garcia · Health Promotion and Chronic Disease Prevention in Canada · Canada
A systematic review (PROSPERO CRD42021254450) searching four databases to 19 February 2025, with duplicate independent screening, risk-of-bias assessment and certainty grading, on food-based interventions that could reduce household food insecurity (HFI) in Canada. Exposure to food voucher programmes may reduce HFI, but exposure to food box, community gardening, school food, hunting and fishing, and food charity programmes may have little to no effect on HFI. The authors conclude that because HFI is primarily an economic problem, food-based responses are unlikely to have a major impact on overall HFI and a more comprehensive public policy approach is required. This is direct counter-evidence to framing community gardens as a food-insecurity intervention.
Limited or null effectHealthPolicyCommunityPrevalence and antibiotic resistance of Escherichia coli in urban and peri-urban garden ecosystems in Bangladesh
2025Pritom Kumar Pramanik, M. Nazmul Hoque, Md. Liton Rana, Md. Saiful Islam, Md. Ashek Ullah, Fahim Haque Neloy, Srinivasan Ramasamy, Pepijn Schreinemachers, Ricardo Oliva, Md. Tanvir Rahman · PLOS ONE · Bangladesh (Dhaka)
Researchers sampled 145 items — 88 raw vegetables, 27 water and 30 soil samples — from rooftop and surface gardens in urban Dhaka North and Dhaka South City Corporations and peri-urban Gazipur City Corporation, Bangladesh, testing for Escherichia coli by culture, biochemical tests and malB-gene PCR. Overall prevalence was 58.62% (95% CI 50.48–66.31): 80.0% in Dhaka South, 44.70% in Dhaka North and 76.7% in Gazipur. In Dhaka, surface gardens were more contaminated (70.83%) than rooftop gardens (46.57%), while in Gazipur rooftop gardens were worse (93.33% vs 60.0%). Of 54 randomly selected isolates, 100% were resistant to ampicillin, with resistance to ciprofloxacin (25.92%), tetracycline (14.81%) and imipenem (9.25%); 14.81% were multidrug resistant and 81.48% carried blaTEM. Home-grown urban vegetables are not automatically hygienically safe.
Contamination & food safetyHealthUrbant landbruk og retten til byen: et veikart for utøvere
2025Arild Eriksen, Deni Ruggeri, Esben Slaatrem Titland · · Norway (Oslo)
This essay examines urban agriculture from the perspective of an architect and urban farmer/beekeeper practicing bottom-up, participatory design in Oslo. Critical dimensions of urban agriculture in public space include private and corporate claims on these landscapes, and its current aesthetics of impermanence are critiqued. The essay questions the notion that the joy and freedom urban agriculture brings to a community should be built upon and enriched by future development and policy.
Governance failureCommunityPolicyHealthBiodiversityEfectividad del Huerto Urbano: Un Enfoque para el Bienestar de los Adultos Mayores Urban Garden Effectiveness: An Approach to the Well-being of Older Adults
2025Marisol Silva-Vera, María de Jesús Jiménez González, Laura Varela Almanza · JÓVENES EN LA CIENCIA · Mexico
A quasi-experimental study in Mexico with 21 adults over 65 evaluated a community urban garden intervention for nutritional status. Participants showed increased nutrition knowledge, a 47.7% rise in vegetable intake, and a 23.8% increase in physical activity. However, anthropometric variables did not show significant differences, indicating limited impact on physical measurements despite positive changes in knowledge and habits.
Limited or null effectElderlyHealthFood educationCommunityUrban foraging behavior in public green spaces: a case study of Nanjing’s central urban area
2025Xiang Zhou, Nan Wang, Jiaying Shi, Michael Hensel · Humanities and Social Sciences Communications · China (Nanjing)
A study of urban foraging behavior in Nanjing's central urban area, China, revealed significant enthusiasm among residents, linking personal childhood experiences to their foraging motivations. However, environmental pollution was identified as a critical barrier to these activities.
Contamination & food safetyCommunityHealthFood educationBiodiversityAsyl, Gemüse und Nachhaltigkeit: Urban Gardening in einer Unterkunft für geflüchtete Menschen
2025Juliane Forßmann, Simon Goebel · Zeitschrift für Flüchtlingsforschung · Germany
An urban gardening project in a residential facility for up to 230 refugees in Germany aims to counteract precarious living conditions. While the garden offers a low-threshold space for knowledge exchange on resource-saving cultivation, biodiversity, and health promotion, this paper also reflects on the project's limits.
Limited or null effectCommunityWelfareHealthBiodiversityFood educationClimate changeCommunity‐Supported Agriculture in Brazil: Co‐Responsibility in Agroecological Production to Strengthen Food Security
2025Rita de Cássia Lisboa Ribeiro, Cecília Rocha, Andhressa Araújo Fagundes · Urban Planning · Brazil
An integrative literature review investigated the potential of Community-Supported Agriculture (CSA) to promote food security in Brazil. CSA can ensure a decent income for family farmers, reducing social vulnerability, and shows significant potential for promoting food sustainability due to its strong influence from agroecology. However, CSA faces a significant limitation in the elitization of this movement, reflecting historical social inequalities where only a relatively small portion of the population can afford healthier food.
Economic viabilityCSA & TeikeiFood sovereignty & justiceEconomicsHealthClimate changeUrban Agriculture: A Pathway for Enhancing Food Security and Poverty Resiliency in Tanzania
2025Francis Mwaijande · African Journal of Empirical Research · Tanzania
This study, using a mixed-methods approach with 600 respondents from urban and peri-urban farmers and agri-food supply chain producers in Tanzania, confirmed urban agriculture's contribution to food availability, accessibility, stability, and utilization. However, it found that urban agriculture is not well-integrated into urban food and poverty reduction policies in Tanzania and is practiced without legitimate policy and legal frameworks. This policy gap indicates an inadequate policy enabling environment for urban agriculture to enhance food security.
Governance failureFood sovereignty & justiceWelfarePolicyHealthANALISIS FAKTOR-FAKTOR YANG MEMPENGARUHI PARTISIPASI MASYARAKAT DALAM PENGELOLAAN URBAN FARMING DI KOTA SURABAYA
2025Rico Yanuar Ardiansyah, Hamidah Hendrarini, Wahyu Santoso · Jurnal Ilmiah Sosio Agribis · Indonesia (Surabaya)
A study in Surabaya City, Indonesia, analyzed community participation in urban farming among 50 respondents from three farmer groups from April to June 2025, using Importance Performance Analysis. While urban farming performed optimally in ecological, socio-cultural, educational & tourism, and health aspects, the economic aspect showed the lowest performance and largest gap. This indicates a need for strengthening outcome management, market access, and community economic empowerment to optimize economic contributions.
Economic viabilityCommunityEconomicsHealthFood educationCONTRIBUTION TO KNOWLEDGE ON THE CONTAMINATION OF BRS LEILA LETTUCE (L. SATIVA) BY LITHIUM CARBONATE (LI₂CO₃)
2025Paula Marques Crelier, Manoel Jerônimo Moreira Cruz, Danusia Ferreira Lima · Seven Editora eBooks · Global
A controlled laboratory experiment cultivated BRS Leila lettuce (L. sativa) in samples contaminated with lithium carbonate (Li₂CO₃) at concentrations of 150 and 200 mol/L. The study found that lithium correlates with other alkaline and alkaline earth elements in the leaves and roots of the lettuce. This indicates a contamination pathway where lithium is absorbed by the plant.
Contamination & food safetyCommunityHealthPeri-urban agricultureAssessment of Municipal Solid Waste Compost Used In Urban Agriculture and Its’ Potential Public Health Impacts In Katsina City, Nigeria.
2025Aminu Zakariyau, Murtala Rabiu · International Journal of Advances in Engineering and Management · Nigeria (Katsina City)
The potential ecotoxicological impacts of municipal solid waste compost (MSWC) on soil, plants, and humans in urban Katsina, Nigeria, were assessed. Analysis of soil mixtures and plant biomass (maize and beans) revealed high phytotoxicity in beans, while maize considered MSWC as phytonutrients. No statistical difference in non-biodegradable substance concentrations in soils and plants was found, and ecological risk index (ERI) indicated low risk; however, Target Hazard Quotients (THQ) suggested a likelihood of non-carcinogenic effects to the ecosystem.
Contamination & food safetyCompostHealthOrganic cycleEstablishing a community garden in Miawpukek First Nation, Newfoundland, Canada: Research brief on soil contamination challenges and solutions
2025Robert J. Moriarity, Meaghan J. Wilton, Eric N. Liberda, Tim Drew, Ada John, Howard Jeddore, Atanu Sarkar, Jim D. Karagatzides, Leonard J. S. Tsuji · Journal of Agriculture Food Systems and Community Development · Canada (Newfoundland)
This study aimed to develop safe community garden sites in Miawpukek First Nation, Newfoundland, Canada, addressing potential soil contamination. Soil testing revealed inorganic arsenic levels exceeding Canadian agricultural guidelines. Hügelkultur-style raised beds with imported soil were used, resulting in undetectable arsenic in potatoes grown there, while potatoes from contaminated soil exceeded safety limits. Kale grown in both raised beds and native soil remained within safety limits.
Contamination & food safetyCommunityHealthFood sovereignty & justiceThe Rise of Urban Agriculture and Its Implications for Food Systems
2025Godswill Ntsomboh Ntsefong · IntechOpen eBooks · Global
This chapter examines the global growth and implications of urban agriculture. While urban agriculture enhances food security, it also introduces food safety risks from contaminated soils and infrastructure gaps. Challenges related to heavy metals, waste, and inadequate land planning are evaluated, and barriers such as land access and limited training for producers persist.
Contamination & food safetyFood sovereignty & justiceCommunityHealthEconomicsPolicyClimate changeSpider Webs as Biomonitoring Tool for Heavy Metal Pollution in Diverse Environments: A Study in Kochi City
2025M Mohan Joseph, Archana T. Anil · Environmental Quality Management · India (Kochi)
This study evaluated spider webs from Cyrtophora cicatrosa and Pholcus phalangioides as biomonitoring tools for heavy metal pollution in urban, industrial, and semi-urban/agricultural areas of Kochi city, India. Analysis of web samples revealed site-specific variations in Cr, Cu, Mn, Mo, Ni, Pb, Sn, and Zn concentrations, with high levels of Zn found in Eloor (7558 ppm) and Kizhakkambalam (4947.50 ppm). Zn and Sn were the dominant accumulated metals, indicating significant heavy metal contamination in these environments.
Contamination & food safetyHealthUrban–rural linkageInvestigation of inorganic nutrients and pollutants in private gardens in central Germany using citizen science
2025Christoph Koch, Maria da Glória Arrais Peter · Environmental Challenges · Germany
This citizen science study analyzed inorganic pollutants in private garden soils in central Germany, including front and backyards. Elevated levels of lead and copper were found in one-third of the samples, and zinc in two-thirds. Chromium and nickel concentrations were also elevated in a quarter of the samples, with some readily available substances exceeding limit values.
Contamination & food safetyCommunityHealthDistribuição Espacial de Chumbo em Mangifera indica e Syzygium malaccense em uma Cidade de Médio Porte, Colômbia
2025Christian Valderrama, Hernan Zarate · Ambiente & sociedade · Colombia (Neiva)
This research characterized the presence and spatial distribution of lead (Pb) concentrations in Mangifera indica and Syzygium malaccense fruit trees on public roads in Neiva, Colombia. Using a census, fruit sampling, and spatial interpolation methods, lead levels were detected in all samples. Five samples exceeded the permissible limit of 0.1 mg/kg, with higher concentrations observed in industrial areas.
Contamination & food safetyHealthFood sovereignty & justiceBuilding evidence regarding nature-based solutions indicators and their implications for policy – the case of air quality
2025Corina Başnou, Geovana Mercado, Åsa Ode Sang, Thomas B. Randrup, Verónica Fabio, Adrián Cabezas, Arnau Lluch, Marc Montlleó, Juan Miguel Kanai, Riccardo Saraco, Olívia Bina, Tom Wild · Nature-Based Solutions · Europe
An overview and guidance for air pollution indicators in nature-based solutions (NBS) for urban green planning and public health were provided, using three case studies in Europe and Latin America. The study noted that approaches including multidimensional indicators in research, planning, and policies are limited, and national standards for some air pollutants are missing with little evidence for health effect thresholds. Findings also indicated that knowledge of pollutant uptake in edible plants can suggest potential human exposure risks.
Contamination & food safetyHealthPolicyClimate changeGardening governance: CSO-government dynamics in Shanghai's urban renewal
2025Mengqi Shao, Linjun Xie · Journal of Environmental Policy & Planning · China (Shanghai)
This study explored the dynamics of civil society organization (CSO)-government relationships through community gardens as governance spaces in Shanghai. Through empirical case studies of three community garden projects, it revealed how political, practical, and personal spheres shape the evolving dynamics between CSOs and local governments. The research highlighted CSOs' pivotal role in mediating between the state and local communities, but noted that challenges such as power asymmetries persist.
Equity & displacementCommunityPolicyEconomicsHealthEfectos de los Huertos Urbanos Escolares en la Educación Ambiental y la Nutrición Infantil: Un Estudio en Instituciones Públicas De Lima Metropolitana
2025María Fernanda Ríos Acuña, Rocío Elena Matos Chávez, Nicolás Manuel Herrera Robles, Carlos Enrique Quispe Vargas, Juliana Beatriz Torres Luján · Ibero Ciencias - Revista Científica y Académica - ISSN 3072-7197 · Peru (Lima)
This review article analyzed the effects of school urban gardens on environmental education and child nutrition in public institutions of Metropolitan Lima. Examining 25 national and international scientific studies using the PRISMA methodological approach, findings showed that school gardens strengthen ecological awareness and promote fruit and vegetable consumption. However, structural barriers such as lack of resources, teacher training, and sustained institutional support were also identified.
Governance failureFood educationHealthPolicy