Research & reports

Sydney Giacalone · Journal for Undergraduate Ethnography · United States (Boston)

This ethnographic study, conducted in Boston and Somerville in the summer of 2016, investigated how urban chicken keeping might transform keepers’ thinking about food systems and animal relationships. The research revealed the unexpected discovery of lead contamination in urban chicken flocks in the Boston area, which unsettled the imagined simplicity of urban agriculture and exposed a "metabolic rift." This finding prompted keepers to engage more deeply with the history of the soil and opened new ways of thinking about collective metabolism, multispecies living, and food politics.

Norbert Becker, Stefanie Schön, Alexandra‐Maria Klein, Ina Ferstl, Ali Kizgin, Egbert Tannich, Carola Kuhn, Björn Pluskota, Artur Jöst · Parasitology Research · Germany

The first mass development of Aedes albopictus, likely introduced by trucks from Italy, was confirmed in an allotment garden area in Freiburg, Southwest Germany, in 2015. Surveillance confirmed a high infestation, with the container index exceeding 30% in August 2015. Control measures, including citizen awareness, environmental management, and Bacillus thuringiensis israelensis (Bti) tablets, successfully reduced the Aedes albopictus population, with the number of gardens without containers increasing from 17% to 35% by September 2015.

Faidza Rika Chandika, Subejo Subejo, Harsoyo Harsoyo · · Indonesia

This study investigated the effectiveness of television as a source of agricultural information and its influencing factors in the peri-urban agricultural area of Sleman Regency, using descriptive, proportion, and multiple linear tests. Results showed that over 50% of farmers assessed television's effectiveness as low. Television effectiveness indicators were 50.43% for cognitive effect, 44.83% for affective effect, and 49.34% for behavioral effect. The motive for watching television most affected effectiveness, with most farmers relying on group meetings and field extension rather than television for agricultural information.

Joshua Sbicca · Digital Collections of Colorado (Colorado State University) · Global

An article examining food as an entry point into the politics and processes of gentrification, discussed with reference to cities globally rather than a single case. Where traditional explanations of gentrification hinge on either political-economy or cultural drivers, the article shows the relationship between the two to argue that food gentrification is multifaceted, changing a neighborhood's class and ethnoracial demographics, foodscapes and foodways, and housing. It states that poor communities in cities around the world can experience harmful effects of food-driven gentrification, such as developers using urban agriculture to attract new residents and increase property values. It also describes food itself as being gentrified in two ways: for communities marginalized by race or ethnicity, culturally important foods become "cool," unaffordable and dispossessed from them, while the upscaling of food retail displaces former bars, cafes, restaurants, grocery stores and gardens. The article closes with a brief discussion of social movement strategies and policy approaches to prevent these harmful effects.

Jacques Godfroid · Archives of Public Health · Global

This opinion paper discusses a One Health approach to brucellosis at the wildlife-livestock-human interface in both industrialized and low- and middle-income countries. It points to pitfalls in serological studies and states that urban and peri-urban farming contributes to the re-emergence of brucellosis in the developing world, identifies wildlife as a potential reservoir, and discusses the ethics of culling wildlife to control disease spread.

Stephanie Stephanie Kartika Lestari · · Europe

A case study of two urban farming organizations in the Netherlands developed a set of indicators to assess factors hampering the diffusion of radical innovation. Urban farming is characterized here as a radical innovation aiming for fresh and sustainable food supply in urban areas that has yet to achieve large-scale diffusion, and the study proposes a non-static conceptual model that lets commercial firms rationally assess barriers to diffusion and revisit their niche strategies as internal and external conditions change.

Ojuolape F. Akande, S. A. Ajayi · International Journal of Environment Agriculture and Biotechnology · Nigeria

This study measured heavy metals (As, Cd, Cu, Pb, Zn) in soil and in amaranth (Amaranthus hybridus) and jute mallow (Corchorus olitorius) vegetables from selected peri-urban farms around Osun State, Nigeria, to assess human health risk. Soil concentrations fell within FAO/WHO (2002) and EU (2006) agricultural background ranges, but vegetable samples showed appreciable metal levels; arsenic was below detection in all samples, amaranth showed higher retention than jute mallow for all metals except copper, the transfer-factor order was Cd > Zn > Pb > Cu, amaranth contributed the highest estimated daily intake for Cd, Cu, Pb and Zn, the health risk index was high for Cd and Pb but low for Cu and Zn, and the hazard index results indicate that vegetables grown on the selected peri-urban farms are not safe for consumption.

Marta Bożym · Ochrona Środowiska i Zasobów Naturalnych · Poland

A study measuring heavy-metal content (cadmium, lead, copper, zinc, nickel, chromium) in compost and resident earthworms sampled from home composters and allotment gardens in the Opole region of Poland. The compost samples themselves were not contaminated with heavy metals and stayed within Polish legal limits for solid organic fertilizers. However, metal accumulation in earthworms varied by metal: the bioaccumulation factor (BAF) was high for cadmium, lead and zinc, while no accumulation was found for nickel, chromium or copper. The authors conclude that earthworm species native to Poland, such as Eisenia fetida, can serve as potential bioindicators of metals in the environment.

Elizabeth A. Miernicki · Illinois Digital Environment for Access to Learning and Scholarship (University of Illinois at Urbana-Champaign) · United States

A study from the University of Illinois at Urbana-Champaign, USA, that identifies soil contamination as a universal concern in urban agriculture and notes that the long-term benefits of alternative soil management systems such as raised beds have not been explored in the scientific literature. Its stated objective is to determine the effects of six soil management options - direct soil with synthetic fertilizer (DSF), direct soil with organic amendments (DSO), raised-bed mixture with synthetic fertilizer (RBMF), raised-bed mixture with organic amendments (RBMO), raised-bed compost-only with synthetic fertilizer (RBCF), and raised-bed compost-only with organic amendments (RBCO) - on yield of kale, garlic, pepper, cilantro and radish, on soil biological, chemical and physical properties, and on ecosystem services such as water and nutrient retention. Data collected include marketable versus cull yield, soil nutrients and organic matter, soil moisture, weed emergence, infiltration rate and bulk density, but this abstract does not report the comparative results themselves.

Fatemeh Kalantari, Osman Mohd Tahir, Raheleh Akbari Joni, Ezaz Fatemi · Journal of Landscape Ecology · Global

This paper critically reviews 60 published documents on vertical farming — cultivating plants and livestock on vertically inclined surfaces such as skyscrapers in land-scarce urban areas — assessing it against environmental, social, and economic dimensions of sustainability, and notes that published critical reviews on the topic remain scarce. Economic viability is named as one of the challenges considered alongside environmental and social factors, but the abstract does not present specific cost, revenue, or failure data to support this; it concludes, without citing supporting figures, that vertical farming can be "potentially beneficial" for food production, quality, safety, and food security.

Jonathan Crush, Bruce Frayne, Cameron McCordic · Journal of food security · Africa

This study uses household survey data from Maseru, Lesotho, to assess the relationship between household engagement in urban agriculture and food security. It found no consistent, statistically significant relationship between urban agriculture practice and food security; some urban agriculture practices were associated with significantly greater odds of food security only among middle-income households in the sample. Because the observed benefits appeared conditional on household income, the study concludes that a generalized, production-centered approach to food insecurity may not be the most effective means of addressing household food insecurity in Maseru.

Katyelle Rafael, Ariella Andrade Marchioro, Cristiane Maria Colli, Bruna Tiaki Tiyo, Fernanda Ferreira Evangelista, Renata Coltro Bezagio, Ana Lúcia Falavigna-Guilherme · Transactions of the Royal Society of Tropical Medicine and Hygiene · Brazil

This study genotyped Giardia duodenalis in raw-eaten vegetables (crisp lettuce, regular lettuce, kale, chicory, and rocket) sampled from street markets and community vegetable gardens in an urban area of southern Brazil. Researchers analyzed 130 samples from street markets and 130 from community gardens (260 total), washing them in Tween 80 solution, filtering through a cellulose acetate membrane, amplifying the GDH gene by semi-nested PCR, and genotyping positive samples by PCR-RFLP. 7.3% (19/260) of samples tested positive for G. duodenalis, from both street markets (10/130) and community gardens (9/130), including both organic and non-organic products. Assemblage AI predominated, but assemblages B and E, which carry zoonotic potential, were also found. The study concludes this points to a need for investigating commercially sold raw vegetables and establishing stricter quality control.

Miriam Hermi Zaar · OKARA Geografia em debate · Brazil

Arguing that analyzing territory across multiple scales requires an analytical framework grounded in the dynamic, repeated interweaving of elements and processes that combine into — and clash as — diverse "territorial fragments," this paper examines urban agriculture as a site where city and countryside, urban and rural, and their diverse practices approach, blend and are sometimes confused with one another. Focusing on horticulturists in the Gramorezinho Community in Natal, Rio Grande do Norte, Brazil, as its case, the study shows that historical and spatial singularities — environmental, socioeconomic and administrative — have produced distinct processes that at times align and at other times contradict one another.

Richard Blaustein · BioScience · United States

Against a backdrop of heightened concern about lead exposure following the lead-contaminated water supply in Flint, Michigan, a review examines prior research on whether sunflowers (Helianthus annuus) can remove lead from urban garden soil through phytoextraction, in which plants draw contaminant metals up into their shoots. Some preliminary studies suggested sunflowers could phytoextract lead, but more extensive research has been disappointing; adding the chelating agent EDTA raises lead's solubility and plant uptake but is expensive and only meaningful combined with other practices such as compost application. Retired USDA scientist Rufus Chaney states that, unlike successful cases such as alpine pennycress extracting cadmium or canola extracting radioactive cesium, no serious study supports significant lead phytoextraction.

Aysun Çelik, Elvan Ender Altay · Kocaeli Üniversitesi Mimarlık ve Yaşam Dergisi · Turkey

A study evaluating the landscape condition of school gardens at 49 schools (30 primary, 19 secondary/equivalent) in the central district of İzmit, Kocaeli Province, Turkey, assessed for space-use profiles, landscape design components, and vegetal components (using a proportional range method for space use and frequency analysis for landscape and vegetal component data). The study found that landscape design of the school gardens is neglected, and that space-use rates fall far below standards compared with developed countries. Green space use was observed in only 43.33% of primary schools and 57.89% of secondary schools; the gap between the school with the largest green area and the one with the smallest was 313 times in primary schools and 57 times in secondary schools. Plant diversity in existing green spaces was found to be quite poor, with grass areas and flower beds rarely used. 93.34% of primary schools, which serve children of play age, had no play equipment areas, and 47% of secondary schools lacked multifunctional playgrounds suitable for basketball and volleyball. The study recommends treating school gardens as part of education and adopting a uniform standard for organizing spaces and components so all students have equal access.

Shobha Shrestha · Nepalese journal of geoinformatics/Journal of geoinformatics Nepal · Nepal

Using GIS, remote sensing and spatial metrics, this study analyzed the spatial structure and dynamics of urban land use, including agricultural land use, in Kathmandu Valley, Nepal, over the ten years from 2003 to 2012. Land use changed drastically over this period, with the most pronounced shifts occurring in the agriculture and built-up classes, signaling rapid urbanization; the valley's spatial structure moved toward a more heterogeneous and fragmented landscape, with new, isolated urban patches emerging inside what had been larger, contiguous agricultural patches and breaking them into smaller fragments.

Gideon Aghaindum Ajeagah, Chumtchoua Armel Landry, Mbouombouo Mama, Foto Menbohan Samuel, Thomas Njiné · Journal of Applied Biosciences · Cameroon

In lowland areas of Yaoundé, Cameroon, where wastewater is used for market gardening, water samples were collected from November 2013 to April 2014, with identification and bio-statistical analysis conducted in 2015-2016. Flagellated protozoan cysts, identified via Lugol staining after zinc-sulfate flotation concentration, were found at average densities of 101±70 cysts/L for Giardia intestinalis, 34±20 cysts/L for Chilomastix mesnili, 3±6 cysts/L for Retortamonas intestinalis, and 1±3 cysts/L for Enteromonas hominis, with the highest densities recorded during the short rainy season (172±108 cysts/L). Cyst density was significantly correlated (P≤0.05) with physico-chemical parameters including suspended solids, oxidizability, and turbidity. The study concludes that vegetables grown with this wastewater must be well washed, disinfected, and thoroughly cooked before consumption to reduce health risks.

Bronwen Morgan, Declan Kuch · Palgrave Macmillan US eBooks · Global

A chapter draws on an extensive study of grassroots innovation responding to climate change, spanning a continuum from social activism to social enterprise, examining the diverse motivations of entrepreneurs who started community-supported agriculture projects, car-sharing schemes, and co-working spaces. It shows how entrepreneurs' differing biographical trajectories shape the initiatives they create around economic, environmental, and social benefits. The chapter argues these benefits must be understood through the ambiguity of a socio-legal lens: while "sharing" initiatives may occasionally catalyze opportunities to move beyond neoliberalism, the ways lawyers and legal techniques shape the infrastructure of collaboration are deeply implicated in the economics of the neoliberal inheritance — meaning such sharing-economy governance remains entangled with, rather than genuinely escaping, neoliberal economic structures.

Eva Olsson, Eva Kerselaers, Lone Søderkvist Kristensen, Jørgen Primdahl, Elke Rogge, Anders Wästfelt · Sustainability · Europe

A study focusing on peri-urban land in Gothenburg (Sweden), Copenhagen (Denmark), and Gent (Belgium) analyzed the relationship between peri-urban food production and urban resilience. It found that arable farming has declined in all three areas since 2000 due to urban expansion and recreational land use changes. While policies for farmland preservation exist, strategies for local food production are not expressed in current planning documents, and competing land uses and high dependence on global food systems reduce peri-urban food production and improvements in urban food security.

Cristina D’Alessandro, Kobena T. Hanson, George Kararach · African Geographical Review · Southern Africa

This paper critically examined existing literature on peri-urban agriculture in Southern Africa, arguing it is a viable livelihood response to feeding urban residents. Despite its potential, the literature indicates that peri-urban agriculture does not play a major role in Southern Africa. The study concluded that a lack of political will and weak or absent policy frameworks, stemming from capacity deficits, hinder its promotion.

Silvio Caputo, Eva Schwab, Kostas Tsiambaos, Mary Benson, Hervé Bonnavaud, Neslihan Demircan, Tim Delshammar, Frederico Meireles, Nerea Morán, Jeanne Pourias · · Global

This chapter provides an overview of emergent approaches to urban gardening, identifying urban dynamics and spatial implications. It notes that a lack of suitable urban land and difficulties in establishing constructive dialogue with local authorities regarding land provision can lead to the use of interstitial urban spaces for gardening practices. An example includes a community-based organization constructing a permaculture garden on a supermarket rooftop, highlighting challenges in land access and governance.

Steve G. Hallett, Lori Hoagland, Emily Toner · Horticultural reviews · Global

This chapter discusses urban agriculture from economic, environmental, and social perspectives, acknowledging differences between urban agriculture in small and large cities, as well as the Global North and South. Urban farms and community gardens can have both positive and negative environmental impacts, such as reducing or increasing energy consumption, improving water infiltration, and beautifying neighborhoods, or producing odors and contaminating water. The chapter also attempts to frame policy recommendations that might help guide urban agriculture's development.

John Crossan, Andrew Cumbers, Robert McMaster, Deirdre Shaw · Antipode · United Kingdom (Glasgow)

This paper examines community gardens in Glasgow, acknowledging their vulnerability to neoliberal cooptation where citizen work may alleviate state service provision. However, it argues that even with neoliberal practices, these gardens cultivate collective practices that suggest a progressively transformative polity. This form of citizen participation, termed "Do-It-Yourself" (DIY) Citizenship, encourages reconsideration of relationships and effective political practice.

Christine Hvitsand · Agroecology and Sustainable Food Systems · Norway

This article explores why Norwegian producers and consumers engage in Community Supported Agriculture (CSA), identifying distinct values and motivations related to environmental protection, justice, health, participation, and communication. While CSA demonstrates transformational power in the agri-food system through sustainable practices and power reallocation, the challenge remains to upscale these actions and prevent the dilution of core values and agroecological practices.

Oscar Díaz Rizo Susana Olivares Rieumont · Anales de la Academia de Ciencias de Cuba · Cuba

This study in Cuba used X-ray Fluorescence and Low-Background Gamma Spectrometry to analyze heavy metal and radioactive element concentrations in marine/fluvial sediments and urban soils. It found heavy metal contamination in coastal sediments of Guacanayabo Gulf, mercury bioaccumulation in oysters from Sagua River estuary, and possible selenium contamination in catfish tissue. The study also reported, for the first time, heavy metal concentrations in urban soils of Havana, Moa, Las Tunas, and Cienfuegos, including in urban agricultural farms, evaluating their quality for urban farming and potential health impacts.