Research & reports

Jin‐Won Kim, In‐Wook Choi, Won-Seok Na, Enkhjargar Baljii, Yong-Man Yu, Young Nam Youn, Young‐Ha Lee · Journal of Food Hygiene and Safety · South Korea (Seoul)

From September to October 2012, 530 samples of nine vegetable types were collected from 11 urban community gardens in Seoul to assess their microbiological quality. Mean total aerobic bacteria and coliforms were detected at 6.3 log CFU/g and 4.3 log CFU/g, respectively, with coliforms found in 67% of samples and E. coli in 2.3%. While foodborne pathogens were not detected, the presence of coliforms and E. coli indicates room for improvement in microbiological safety.

Arnaud Frauenfelder, Christophe Delay, Laure Scalambrin · Espaces et sociétés · Switzerland (Geneva)

This article examines a contemporary urban reform in Geneva concerning family gardens, whose status is now in competition with new forms of community gardens. While the reform is presented as necessary, spokespersons for family allotment associations welcome it with some reservation. Social actors' positions for or against the reform implicitly refer to different socially situated modes of gardening and lifestyles, revealing that "urban agriculture" masks heterogeneous social meanings behind a visible consensus.

Jiang Lu · Nongye jingji yu guanli · China (Beijing)

This study analyzed the current state of urban agriculture development in the Beijing-Tianjin-Hebei region, focusing on aspects like leading industry and farmers' income. It found that while the urban agriculture layout was basically formed, significant problems exist. These include resource and environmental crises, a lack of integrated regional planning, imperfect municipal systems, and challenges in upgrading the agricultural industry.

Qiang Liu, Jingshuang Liu, Qicun Wang, Yang Wang · Human and Ecological Risk Assessment An International Journal · China (Jilin City)

This study investigated heavy metal pollution levels by collecting 50 soil samples from urban vegetable fields in Jilin City, China. Mean contents of Pb, Cr, Cu, Ni, Zn, and Cd were higher than their corresponding natural background values. However, the distribution of comprehensive pollution index values indicated that concentrations of these heavy metals in most agricultural fields did not exceed baseline values affecting agricultural production safety and human health according to China's soil environmental quality standard, concluding insignificant contamination by these metals in Jilin City.

LaShonda M. Stewart, Steven A. Miller, R. W. Hildreth, Maja V. Wright-Phillips · New Political Science · United States (Chicago)

A preliminary analysis of Chicago's 49th Ward, the first participatory budgeting experiment in the United States, examined whether it resulted in different budgetary priorities and met social justice outcomes. Citizens chose projects classified as low priority by research literature, and while there was no clear pattern of projects only in affluent areas, geographic clustering was evident. Select areas received projects like community gardens, while others were limited to infrastructure repairs, indicating mixed social justice outcomes.

Mark Matsa, Beauty Dzawanda · · Zimbabwe

This study assessed the performance of Caritas-initiated and sponsored community gardens in Chaka ward, Chirumanzu District, Zimbabwe, during and after the sponsors' regime. Data was collected using questionnaires, interviews, and direct observations, and analyzed with descriptive statistics and content analysis. Results showed that the gardens flourished during Caritas's presence but quickly shrank and folded after the NGO's departure, indicating a lack of sustainability.

Song Pin · Anhui nongye kexue · Global

This paper examines the obstacles and forming factors in project financing for Community Supported Agriculture (CSA), identifying problems such as imperfect investment entities, unclear financing objectives, and single investment methods and channels. Using a four-stakeholder model (project investors, national policy, CSA, and consumers), the study elaborates on the causes of these financing difficulties. It proposes solutions including strengthening CSA's brand and marketing to cultivate loyal customers, and leveraging government, financial institutions, and private capital to address financing challenges.

Shi Jia-li · · China (Tianjin)

This paper studies the important roles of leisure agriculture in the development of Tianjin's modern urban agriculture. It emphatically analyzes the major problems of science and technology during the promotion of leisure agriculture and puts forward the significances of science and technology support in leisure agriculture.

Ranka Junge, Andreas Graber · Zürcher Hochschule für Angewandte Wissenschaften digital collection (Zurich University of Applied Sciences) · Global

This paper discusses the need for practical tools and a stronger scientific base for sustainable urban farming, noting that visionary schemes often lack current practical application with available technologies. It identifies requirements for urban food production, including high quality, safety, and cost-effectiveness, and suggests innovations in planting, pest control, irrigation, and integration with existing building infrastructures. Aquaponics is presented as having the potential to contribute to all these aspects.

UM Dawaki, A. U. Dikko, SS Noma, U. Aliyu · Nigerian Journal of Basic and Applied Sciences · Nigeria

A study investigated the total, exchangeable, and soluble concentrations of heavy metals (Cu, Cr, Ni, Zn, Pb, Cd) in urban agricultural soils along three rivers (Challawa, Jakara, and Watari) in Kano, Nigeria. Cadmium concentrations at Jakara and Challawa exceeded maximum allowable concentrations in soils. Heavy metal concentrations were found to be significantly higher in areas irrigated with industrial and domestic sewage (Challawa and Jakara) compared to the control site (Watari).

Evan Weissman · Renewable Agriculture and Food Systems · United States (New York City)

This case study in Brooklyn, New York, used mixed qualitative research methods to investigate the political possibilities of urban agriculture for fostering food justice. Findings indicate that problematic contradictions rooted in the neoliberalization of urban agriculture limit the transformative possibilities of farming the city as currently practiced in Brooklyn. The study suggests that longstanding agrarian questions are informative for critically interrogating urban agriculture as a politicization of food.

Ekaete Francis Asuquo · · Nigeria (Calabar)

The impact of urban expansion on agricultural land in Calabar and its environs, Nigeria, was investigated. A survey of 150 questionnaires and comparative assessment revealed a decrease in agricultural land in the fringes as urban expansion persists and increases. Before 2013, more farmers owned larger plots, but much of this agricultural land has been converted to housing estates, roads, leisure resorts, and schools, indicating that urban expansion has negatively impacted agricultural land, reducing food productivity and leading to farmer unemployment.

Green Hope, River Edge, New Jersey 07661, USA., Hye Jin Keum · Journal of people, plants, and environment · United States

The philosophical background and historical development of the school garden movement in the USA were examined. The movement demonstrated a process of formation, decline, and revival. It began to diminish after World War I and was pushed to extinction by technological advancements in the 1950s, before resurging from the 1990s to address childhood obesity, nature-deficit, and improve academic achievements.

Pierrette Hondagneu‐Sotelo · Boom · United States (Los Angeles)

This article recounts the history of a central Los Angeles community garden, primarily used by women from Southern Mexico and Central America, which served as an informal support network and a place to grow culturally significant plants. The essay then details the significant upheaval that occurred after a local nonprofit took over and invested in the garden, implying a negative impact on the existing community.

Dehui Wu, WU, Dehui · AgEcon Search (University of Minnesota, USA) · China

This 2014 study analyzed urban agriculture development in China's Central Economic Zone, identifying several existing problems. These issues included understanding deviation, extensive development, market confusion, short industrial chains, low specialization, and a harsh environment. The study proposed countermeasures such as strengthening government macro-control and perfecting compensation mechanisms.

A. N. Mutune, M. A. Makobe, Mary Abukutsa‐Onyango · African Journal of Environmental Science and Technology · Kenya (Nairobi)

This study analyzed heavy metal content in 10 common African leafy vegetables and their rhizosphere soils from 25 sites along Nairobi Rivers, Kenya. While soil metal concentrations were generally within WHO/FAO permissible levels, except for some cadmium instances, all metals except copper in vegetables exceeded recommended limits at a few sites. This indicates potential heavy metal absorption from industrial and domestic effluent.

Erin Silva, Fengxia Dong, Paul D. Mitchell, John Hendrickson · Renewable Agriculture and Food Systems · United States (Wisconsin)

A survey of Wisconsin-certified organic vegetable farmers investigated the relationships between farm characteristics, marketing strategies, and farmers' perceptions of profitability and quality of life. The data indicated that farmers selling into farmers' markets and through community-supported agriculture (CSA) were more likely to be dissatisfied with their profitability. Conversely, farmers selling into wholesale markets and restaurants/institutions were significantly more likely to be dissatisfied with their quality of life.

Salwa Tohmé Tawk, Mounir Abi Said, S.K. Hamadeh · Oxford University Press eBooks · Global

This study in the Middle East and North Africa region investigated the relationship between urban agriculture and food security in two peri-urban locations: Bebnine, Lebanon, and Wadi el Seer, Jordan. High food insecurity was prevalent in both locations, demonstrating that producers were more food insecure than non-producers. Food security was found to be strongly associated with poverty and the number of household members.

Yuki Sampei, Yuji Hara, Akinobu Murakami, Armand PALIJON, Kazuaki Tsuchiya, Makoto Yokohari · Journal of The Japanese Institute of Landscape Architecture · Philippines (Metro Manila)

The nitrogen supply-demand balance in compost and vegetable production on vacant lots in suburban residential districts of Quezon City, Metro Manila, was assessed. Analysis revealed that almost half of the subdivisions faced nitrogen oversupply, while several were in short supply. Current centralized composting facilities may not adequately support a continuous compost recycling system due to their distribution patterns. It was proposed that existing barangay-based policies on organic waste management and urban agriculture require greater flexibility and attention to coordination systems across subdivision boundaries.

Kylie Markow, Sue Booth, Stephanie Savio, John Coveney · Nutrition & Dietetics · Global

This study compared perspectives of low socioeconomic individuals and food system representatives regarding access to community-based food systems. Focus groups with low socioeconomic individuals and interviews with food system representatives revealed that affordability, convenience, and knowledge were barriers. While representatives acknowledged these barriers, their understanding of importance differed, and views were divided on strategies, especially concerning affordability. A disconnect exists between the two groups' views on improving access for disadvantaged groups.

Abdirahman Osman Warsame, Fadumo Abdi Mohamud, Ahmed Hassan Ali · Zenodo (CERN European Organization for Nuclear Research) · Democratic Republic of the Congo (Kinshasa)

This scoping review synthesized evidence on the association between heavy metal contamination in vegetables sold in Kinshasa's urban markets, Democratic Republic of the Congo, and human biomarkers of consumer exposure. Available evidence consistently showed that vegetables, particularly leafy greens, from Kinshasa markets contained elevated levels of lead and cadmium, often exceeding international safety limits. However, studies directly linking vegetable contamination with human biomarkers are notably scarce, suggesting a potential exposure pathway but not establishing definitive causation.

Ashley S. Harms, DeAnn Presley, Ganga M. Hettiarachchi, Chammi P. Attanayake, Sabine Martin, Steven J. Thien · Natural sciences education · United States (Kansas City)

This case study examines the decision faced by Mr. John Holloway in Harmony Park, Kansas City, MO, regarding establishing a community garden on a vacant brownfield site in 2009. Concerns arose about soil contaminants on the site, leading to a dilemma about the potential harm versus benefits of gardening in a food desert. The case requires students to evaluate environmental, agronomic, human health, social, and economic issues related to urban soil contamination.

Daniel Haberman, Laura A. Gillies, Aryeh Canter, Valentine Rinner, Laetitia Pancrazi, Federico Martellozzo · ISPRS International Journal of Geo-Information · Canada

This study used multiple land use scenarios to assess different spaces in Montréal, including residential gardens, industrial rooftops, and vacant land, that could be allocated to vegetable production. Results indicated that implementing hydroponics on industrial rooftops could easily satisfy Montréal's vegetable demand, though these operations are generally costly. Utilizing only vacant space also has the potential to meet the city's demand with lower operating costs.

Nicole C. List · EchoGéo · Senegal (Pikine)

Based on fieldwork in Pikine, a rapidly urbanized city in Senegal's Dakar region, two interconnected conflict cases concerning the development of urban agricultural land for middle-class and elite housing were analyzed. The analysis indicates that public and private actors, including producers, traditional authorities, real estate developers, and local/central government officials, are abandoning old forms of governance in favor of "territorial alliances" to promote their own urban development projects. These alliances lead to new relationships between local/central government members and civil society, impacting urban Senegal's land registry, property rights, and public infrastructure.

Anjar Lulu Sakinah, Enny Zulaika · Jurnal Sains dan Seni ITS · Indonesia

This study aimed to isolate Azotobacter strains from the Eco Urban Farming ITS land in Indonesia that are resistant to HgCl2 and potentially produce mercury reductase enzymes. Ten HgCl2-resistant Azotobacter isolates were obtained, with isolates A5, A6, and A9 showing the highest resistance at 20 mg/L HgCl2. Isolates A5 and A9 were identified as having the potential to produce mercury reductase enzymes.