Research & reports

George Martin, Roland Clift, Ian Christie · Sustainability · Global

This exploratory study examined three urban cultivation sites in New York, London, and San Francisco to assess their nutritional, ecological, and social sustainability contributions. Field analysis revealed very low food outputs relative to the populations of their catchment areas, indicating that most urban food will continue to come from outside urban peripheries. The study concluded that urban food growing's sustainability benefits are more social than agronomic or ecological.

Jin-Hee Ju, Won-Tae Kim, Hui Xu, Young-Han Yoon, Eun‐Young Choi · Journal of Environmental Science International · Global

This study investigated the influence of hydrophilic polymer (HP) mixture ratio on the growth of eggplant (Solanum melongena) for lower maintenance urban agriculture via green roofs. As the hydrophilic polymer mixture ratio increased, the growth index, number of leaves, leaf length, leaf width, and dry weight of shoot and root decreased. Specifically, these values were significantly lower in HP5.0% and HP10.0% treatments compared to the control, and the survival rate was lowest at 56% in the HP10.0% treatment.

Marion Ernwein · Open Collections · Switzerland (Geneva)

This paper critically examined municipal involvement in community garden and urban agriculture development in the canton of Geneva, Switzerland, focusing on a case study in Vernier. It found that the municipality's urban agriculture program serves contradictory functions, being simultaneously progressive in reversing space privatization and nature commodification, yet also reinforcing the neoliberal production of individualized, self-responsible, and self-entrepreneur subjectivities. The highly-regulated nature of these municipal community gardens complicates their categorization as either grassroots or purely institutional projects.

Joshua Zeunert · UNSWorks (University of New South Wales, Sydney, Australia) · Australia

Urban public green spaces typically require external budgets for maintenance, with most projects costing municipal authorities more money than they generate, making them economically unproductive. For instance, the Adelaide Parklands annually costs AU$9 million for maintenance while generating less than AU$1 million in income. Maintenance spending on public green spaces in the USA, UK, and Australia has been declining, a trend accelerated since the 2008 global financial crisis.

Prince Antwi-Agyei, Adam Biran, Anne Peasey, Jane Bruce, Jeroen H. J. Ensink · BMC Public Health · Ghana (Accra)

This cross-sectional study in Accra, Ghana, assessed faecal exposure among 80 farm workers during dry and wet seasons, analyzing water and soil samples for E. coli. The results showed that while irrigation water was highly contaminated (5.6 Log E. coli/100 ml), exposure to farm soil (2.3 Log E. coli/g) was the key risk pathway due to soil-to-mouth events, with 53% of farmers experiencing such events daily. The estimated norovirus infection risk to farmers was found to be higher than guidelines set by the WHO, indicating that exposure to soil is a critical pathway of pathogen risk in wastewater farmers, exceeding recommended health targets.

Leila A. Graves, Harrison Hughes, Meena M. Balgopal · Journal of Agricultural Education · Global

This case study examined the implementation of a horticulture-based curriculum by two 3rd grade teachers and two STEM coordinators. While one STEM coordinator found the curriculum addressed academic science standards and provided relevant inquiry activities, the other STEM coordinator and teachers believed garden plants did not address science standards and only supported enrichment. This highlights a divergence in perception regarding the curriculum's alignment with academic standards.

Sheri L. Johnson, Dalila Cardona, J. H. C. Davis, Benjamin Gramling, Chelsea Hamilton, Ray G. Hoffmann, Sabrina J. Ruis, Douglas J. Soldat, Steve Ventura, Yan Ke · Progress in community health partnerships · Global

This study used community-based participatory research to explore backyard gardening practices and soil lead concentrations in urban neighborhoods. Interviews with 20 adult gardeners revealed perceived benefits but few initial concerns about lead exposure, despite children's active involvement. Soil lead concentrations from 17 residential properties ranged from 7 to 3,234 mg kg-1, significantly higher than commercial soils (6 to 13 mg kg-1), indicating a contamination risk.

Laure‐Elise Ruoso, R. Plant, Brent Jacobs, Pierre Maurel · · Australia (Western Sydney)

This study, based on in-depth interviews with farmers in peri-urban Sydney, Australia, examines how changes in these areas impact farmers' place identity and decision-making. It analyzes how increasing urban development, land subdivision, rising land values, and environmental regulations threaten farming activities. The findings indicate that these factors influence farmers' practices, business management, and decisions to continue or relocate peri-urban farming.

E.N. Sabiiti, Constantine Bakyusa Katongole · Water science and technology library · Uganda

Wakiso district, the peri-urban area surrounding Kampala, Uganda's capital city (population about 1.51 million), ranks first nationally in poultry production and second in pig production, accounting for 7.4% and 6.3% of the national chicken and pig populations respectively. The chapter finds that agricultural land in these peri-urban areas is increasingly at risk from urban encroachment, driven by population growth, distorted land values, a construction boom, and expanding recreation and leisure facilities competing with farming for land, which is likely to adversely affect the city's food security.

Hiran Roy, C. Michael Hall, Paul W. Ballantine · · Global

This excerpt is the introduction to a chapter on barriers facing hospitality businesses' use of local food; it covers only the background on rising North American and European consumer demand for local food, driven by desire for fresh food access, support for local farmers and communities, and concerns over trust, locality, transparency, animal welfare and food safety, alongside the post-1990s growth of farmers' markets, food box programs and community-supported agriculture. The specific economic barriers and constraints named in the chapter's title are not described within this excerpted text.

Jaimie N. Davis, Mackenzie R Spaniol, Shawn Somerset · Public Health Nutrition · Global

A review of thirteen school garden programs for children (kindergarten to 8th grade) found methodological limitations: three studies lacked control groups, and none were randomized. While six of eleven programs showed increased vegetable intake and seven of eight showed increased preference for vegetables, four programs had no effect on intake. More research is needed to understand long-term dietary improvements.

Eric Holt-Giménez · Journal of Agriculture Food Systems and Community Development · Global

This paper argues that the modern food system, shaped by 30 years of neoliberal globalization, has led to unprecedented global inequality, disproportionately affecting people of color. Despite the emergence of a U.S. food movement focusing on various components like urban agriculture, the underlying structures of the corporate food regime continue to control the context of these alternatives, hindering systemic change.

Benno Gammerl, Rainer Herrn · sub\urban zeitschrift für kritische stadtforschung · Global

This article outlines the theoretical, empirical, and political potential of the tension between affective disruptions of ordered structures and the emotional processing of power-infused spatial relations. It uses urban gardening practices and gentrification debates as examples to demonstrate how analyzing dynamic interactions between spaces and feelings can foster a critical perspective on urbanity, particularly regarding issues of equity. The study focuses on the ambivalent dynamics and effects of emotional-spatial processes.

Nida Bayındır · Route Educational and Social Science Journal · Global

This research investigated primary school teachers' pedagogical expectations regarding school gardens. The study found that 60.7% of primary school teachers considered their school gardens pedagogically insufficient. Teachers primarily identified a need for more pedagogical equipment in school gardens, and desired features like Atatürk busts, flags, mini activity corners, floor games, and functional sports fields.

Díaz Rizo, Óscar, Olivares Rieumont, Susana, D'Alessandro Rodríguez, Katia, López Pino, Neivy, Arado López, Juana Orquídea, Gelen Rudnikas, Alina, Díaz Arado, Óscar, Lima Cazorla, Lázaro, García Céspedes, Damaris, González Hernández, Patricia, Arencibia Carballo, Gustavo, Padilla Cabal, Fátima, Echevarría Castillo, Frank, Hernández Merlo, M., Casanova Díaz, A., Corrales Martínez, Y., Reyes, H., Viguri Fuente, Javier Rufino, Ródenas Palomino, Carmen, Santana, J. L. · UCrea (University of Cantabria) · Cuba

This 2015 study in Cuba used X-ray Fluorescence and Low Background Gamma Spectrometry to analyze heavy metal and radioactive element concentrations in marine/river sediments and urban soils. It found heavy metal contamination in coastal sediments of Guacanayabo Gulf and possible selenium contamination in the Sagua River estuary. The study also reported heavy metal concentrations in urban soils of Havana, Moa, Las Tunas, and Cienfuegos, including contamination levels in urban agricultural farms.

Gauthier Dobigny, Madougou Garba, Caroline Tatard, Anne Loiseau, Maxime Galan, Ibrahima Kadaouré, Jean‐Pierre Rossi, Mathieu Picardeau, Eric Bertherat · PLoS neglected tropical diseases · Niger

An extensive survey of urban rodents in Niamey, Niger, investigated the presence and distribution of rodent-borne pathogenic Leptospira species. Leptospires were not detected in the core city, but L. kirschneri was found in Arvicanthis niloticus and Cricetomys gambianus, rodent species restricted to irrigated cultures within the city. This study indicates the importance of market gardening in the maintenance and circulation of leptospirosis within Sahelian cities.

Isabela Thomas Mkude · Journal of Water Resources and Ocean Science · Tanzania (Dar es Salaam)

This study assessed heavy metal concentrations in 12 groundwater samples from Keko and Kigogo areas in Dar es Salaam, Tanzania, during dry and rainy seasons. While copper and zinc concentrations were low, lead concentrations were detected beyond WHO permissible levels (0.01-0.35mg/l). This high lead presence may be attributed to urban agriculture activities, onsite facilities, and industrial waste discharge around the Msimbazi river.

Abdul‐Halim Abubakari, Laura Atuah, B. Banful, Hypolite Bayor · Journal of Soil Science and Environmental Management · Ghana

A study in Ghana reviewed literature and surveyed farmers on soil amendments for urban horticulture. The review found that research on soil amendments has been limited to land management and nutrient recovery, not addressing quality issues for specific production systems. Farmers adopt varying application rates due to lack of standardization, and barriers include technology for collection, funds for purchase, and labor employment.

Alessandra Manganelli · Lirias · Global

This early-stage PhD research (Month 12) investigates the governance of Alternative Food Networks (AFNs), focusing on their internal dynamics and relations with external institutions. While civil society actors catalyze AFNs, the institutional environment they face is not always favorable or accountable, with examples including changes in political priorities and constraining regulations. The Brussels-Capital Region serves as the main empirical case study, analyzing movements like GASAP and "Le Debut des Haricots."

Eric Weaver · Suburban Sustainability · Global

This review details the relationship between key planetary systems and the many adverse impacts of industrial agriculture, drawing from top-tier journals. Research indicates that industrial agriculture is a major force pushing environmental limits, with multinational corporations continuing to influence national environmental regulations. Current literature debates whether political systems can institute sustainable solutions, suggesting that grassroots efforts may be the most viable solution to displace the industrial agriculture model.

Kin Wing Chan · Open Research Exeter (University of Exeter) · Hong Kong

This study examines the politics of meat production in Hong Kong's 2006-2007 License-Buy-Back Scheme (LBBS), focusing on pig farming. It investigates how the LBBS served as a tactic to reduce and control the pig farming industry, contrasting it with urban vegetable farming which holds a more positive aesthetic image. The research highlights a scarcity of studies on why certain forms of urban agriculture are valued more than others.

Claire L. McCarty, Pamela Dixon · Journal of case studies · Global

A case study on the West Central Food Hub Producers' Co-op reveals that the group decided not to proceed with starting the Food Hub Co-op. The decision was made because the costs for management, infrastructure, and delivery would far outweigh the co-op's profitability, leading to its discontinuation.

Christine Aubry, Jeanne Pourias, Anne Cécile Daniel · HAL (Le Centre pour la Communication Scientifique Directe) · Global

Urban agriculture is gaining popularity, often for its contribution to urban greening, re-establishing connections between urban dwellers and agricultural and food production, and among urban dwellers themselves. However, urban agriculture also involves significant health issues, which advocate for urban planning that promotes its maintenance or establishment under healthy environmental conditions.

Sarah James · Area · Australia (Sydney)

This paper argues that small-scale family farmers on Sydney's urban fringe are directly connected to and reliant on the mainstream food system for their economic viability. It highlights that a localized focus on threats and solutions risks neglecting the impact of supermarket power and consumer choice on these producers. The study emphasizes the need to examine the continuing connection between the mainstream system and 'local', small-scale producers to achieve food system change.

David Mkwambisi, Andrew J. Dougill, Philip Antwi‐Agyei, C. P. Chabvuta · CABI eBooks · Malawi

Research in Lilongwe and Blantyre, Malawi, assessed urban agriculture's potential to improve soil quality, crop yields, and livelihoods. Preliminary evidence showed urban waste could address food insecurity and soil nutrient benefits, but several constraints in waste management were identified. City authorities are not proactively utilizing organic municipal waste for soil quality and agricultural production benefits.