Research & reports

Elisabeth Ziss, Wolfgang Friesl‐Hanl, Sophia Götzinger, Christoph Noller, Markus Puschenreiter, Andrea Watzinger, Rebecca Hood‐Nowotny · Sustainability · Europe

In the "Heavy Metal City-Zen" citizen science project, community members in urban gardens in Vienna, Austria collaborated on collecting soil and plant samples to assess heavy metal contamination risk. Trace metal concentrations were generally below guideline thresholds, but at a few garden sites soil concentrations of lead, cadmium and zinc exceeded Austrian recommended limits, and at two sites plant trace metal concentrations exceeded European food standard limits; the project proposes expanding the citizen-led sampling to all of Vienna so new gardens can assess local soil risk before planting.

Chong Ling Chan, Pui Yee Tan, Yun Yun Gong · Proceedings of The Nutrition Society · Global

This record is a systematic review evaluating the effectiveness of school garden-based programs on nutrition-related knowledge, attitudes and practices among school children aged 3 to 18; no abstract text is available for this content beyond that description, so no further findings can be reported here.

Clare Jackson, Sara Ronzi · Health Education & Behavior · United Kingdom

A 2021 study used photovoice methods to explore residents' perceptions and experiences of "The Grange," a community-led, multifaceted intervention incorporating a community hub and garden in a small, high-deprivation, poor-health area of North-West England. Through photographs, semi-structured interviews, a focus group, and a photo exhibition, it engaged intensively with six residents, who identified positive and negative aspects of activities such as the community garden and community shop and communicated recommendations directly to policymakers at the exhibition event. Participants reported valuing the culture of inclusivity and friendship associated with The Grange more than the specific activities themselves.

Louise Mitchell, Lawrence Houston, Michael Hardman, Michelle Howarth, Penny A. Cook · Cogent Social Sciences · Global

Against the backdrop of health services becoming stretched, particularly in ageing populations in the Global North, this paper discusses Green Infrastructure (GI) interventions including the development of social farms in urban areas and deprived communities. Social farms use farming practices as spaces for therapeutic outcomes such as care, rehabilitation, and education, framed within the concept of social prescribing alongside community gardens and urban farms as non-medical approaches. Noting that social farming and social prescribing research is currently concentrated in Scandinavian countries and the USA, the paper focuses on increased UK attention to the concept, including in DEFRA's 25-year Environment Plan. Findings show an agglomeration of social farming sites in rural rather than urban contexts, and the paper discusses tools and barriers for urban development of the practice.

Shahida Mohd Sharif, Norsidah Ujang · INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY · Indonesia

Noting that more than 50% of the population is projected to live in urban areas by 2050, and that urban migration raises the risk of insufficient social support leading to individualism, social isolation, and loneliness, a conceptual framework is proposed for investigating the level of social bonding among participants in community gardening activities. The paper argues that the choice of urban green space type is critical for wellbeing, positions community gardens as an intervention strategy for reintegrating socially isolated people into community life, and suggests that urban designers and policymakers adopt community gardens as safe public spaces for social interaction.

Anna Barra Caracciolo, Valentina Terenzi · Microorganisms · Global

A review of the rhizosphere as a microhabitat of intense chemical dialogue between plants and microorganisms covers synergistic interactions that can enhance plant function and productivity, including responses to stress conditions such as heavy metal (HM) contamination, alongside the risks such contamination poses. Where heavy metals are present in agricultural soils, there is a risk of metal uptake by edible plants leading to bioaccumulation in humans and animals with detrimental health consequences, and plant productivity itself can be negatively affected; many bacteria have defensive mechanisms for resisting heavy metals and can improve plant responses to HM stress, but achieving such beneficial rhizosphere interactions is described as hard to attain in agroecosystems managed with traditional practices that focus on maximizing crop yield.

Anne Cleary, Julie Dean, Danielle Pollock, Lisa McDaid, Frances M. Boyle · JBI Evidence Synthesis · Global

A protocol for a scoping review aiming to understand the types of nature-based interventions currently used in bereavement care and to map the theories of change explaining how such interventions may support bereavement care. It notes bereavement can be associated with adverse psychosocial health outcomes, describes this as an emerging research field, and states there is a need to explore the literature on different types of nature-based interventions used in bereavement care, including animal-assisted therapy, care farming, therapeutic horticulture, and community gardens, and to identify the underpinning theories of change. Inclusion criteria cover studies or reviews of participants who experienced bereavement following the death of a loved one and took part in a nature-based intervention, across all nature contexts and geographic locations. The planned method searches eight databases—Web of Science, Scopus, PubMed, PsycINFO, CINAHL, Social Science Database (ProQuest), PTSDpubs (ProQuest), and Research Library: Health and Medicine (ProQuest)—plus manual reference-list and keyword searches, extracting data on intervention type, target sample, health outcomes, measures and methods, and theory of change, to be presented in tabular format with a narrative summary.

Denise Junqueira Matos, Fernanda Pinto Ferreira, Natália Ingrid Pezzoti, Luana de Melo Scardovelli, Italmar Teodorico Navarro, Letícia Santos Balbino, Gabrieli Dutra Gonçalves, Kátia Denise Saraiva Bresciani · Brazilian Journal of Development · Brazil

A 2021 study examined environmental management conditions and the occurrence of Escherichia coli in irrigation water, helminths in vegetables, and protozoa (Cryptosporidium spp., Giardia spp. and Toxoplasma gondii) in soil, fertilizer, water and vegetables from community gardens in Araçatuba, São Paulo State, Brazil, covering all six gardens registered with the city's Agro-industrial Development Secretariat. An epidemiological questionnaire was administered to garden workers, and each garden was sampled for 40 liters of treated water or 10 liters of untreated water, about 10 g of soil, 10 g of fertilizer, and one bunch each of lettuce and another vegetable. E. coli in irrigation water was detected using the Colilert Kit (IDEXX Laboratories); helminths and their eggs in vegetables were assessed by optical microscopy; and Cryptosporidium spp., Giardia spp. and T. gondii were assessed by PCR in water, soil, fertilizer and vegetable samples. Results showed that an urban location, use of treated water, absence of open pits, area limits set by walls or fences, and absence of domestic animals in the community gardens were together sufficient to prevent detection of E. coli in irrigation water, helminths in vegetables, and Cryptosporidium spp., Giardia spp. and T. gondii in water, soil, fertilizer and vegetable samples.

Bethan R. Mead, Jessica Davies, Natalia Falagán, Sofia Kourmpetli, Lingxuan Liu, Charlotte A. Hardman · Emerald Open Research · United Kingdom

A cross-sectional online survey conducted during the UK national lockdown in March–April 2020 measured home food growing, perceived food insecurity, well-being and opinions of urban agriculture (UA). Participants were 477 UK-based adults (369 female, mean age 39.57 ± 13.36 years), of whom 152 had been engaged in home food growing before the pandemic; responses were compared with a separate sample collected before the pandemic (N=583). Participants who engaged in home food growing had lower food insecurity (U=19894.50, z=−3.649, p<0.001, r=−0.167) and higher well-being (U=19566.50, z=−3.666, p<0.001, r=−0.168) than those who did not grow food at home. Perceived food insecurity partially mediated the relationship between home food growing and well-being. Opinions of UA showed no difference compared with the pre-pandemic sample. Home food growing may have had a protective effect on perceived food security and well-being in the early stages of the pandemic, and opinions of UA remained positive and unchanged relative to pre-pandemic levels.

Irina Mildawani, Arief Rahman · The Journal of Synergy Landscape · Indonesia

A survey of 148 respondents in the Jabodetabek region of Indonesia, conducted via Google Form between July and December 2020, examined household gardening preferences during the COVID-19 pandemic compared with activities before and predicted after it. Using qualitative content analysis (QCA), the study assessed emotional well-being and explored variation in garden type — vegetable versus ornamental plants, community versus household gardens, and who was involved. Gardening was seen as a favorable activity generating happy family time, with respondents wanting to continue it after the pandemic, but landscape architects had not yet been chosen as gardeners when professional assistance was needed.

Anthony Kamara, Foday Thullah · Journal of Nuclear Technologyin Applied Science (JNTAS) /Journal of Nuclear Technologyin Applied Science (JNTAS) · Africa

A study measured background radiation at the two major dumpsites in Freetown, Sierra Leone — Kingtom and Granville Brooke — which are also used for urban agriculture and where youths scavenge scrap metals and plastics daily. Using a portable Radiagem survey meter and GPS, researchers took 10 in-situ dose-rate measurements at each site. The mean equivalent dose rate was 0.8 mSv/year at Kingtom and 1.1 mSv/year at Granville Brooke; Kingtom slightly exceeded the UNSCEAR permissible limit but stayed below the ICRP limit, while Granville Brooke exceeded both the UNSCEAR and ICRP limits. The study concludes both dumpsites could become unsafe in the near future from cumulative radiation exposure for workers, scavengers and other exposed individuals.

N. R. Madeira, Valdely Ferreira Kinupp, Lídio Coradin · · Brazil

This book chapter brings together reflections on neglected and underutilized species (NUS) in Brazil — plants popularly known today as "non-conventional edible plants" (PANC in Portuguese) — discussing the historical context of their use in this continental country with enormous biodiversity and cultural diversity. It highlights significant efforts undertaken to spread knowledge of and rescue and promote the use and conservation of NUS, and addresses related issues of agroecology, climate change, urban agriculture, local production, nutrition, gastronomy and food sovereignty.

Norbert Goldfield · · Israel

A chapter on an HATD-funded joint farming initiative between Israeli Jews and Bedouin in southern Israel, covering the geographic setting, the organizations involved, the initiative's activities, preliminary results and possible future directions. It cites prior US research on community-supported agriculture, including a randomized clinical trial reporting that CSA participation produced clinically meaningful improvements in diet quality, and describes White Hill Farm (WHF) as one of only a handful of efforts concretely promoting engagement between Israeli Bedouin and Israeli Jews amid ongoing tension between the two groups.

Melinda Suto, Shelagh A. Smith, Natasha Damiano, Shurli Channe · Canadian Journal of Occupational Therapy · Canada

Sustaining well-being is a challenge for people with serious mental health issues. Community gardening is used as an occupation to promote clients' well-being, though evidence supporting this intervention remains limited. This paper examined how facilitated community gardening programs changed the subjective well-being and social connectedness of people living with mental health issues. Using a community-based participatory research approach and qualitative methods with 23 adults living in supported housing and participating in supported community gardening programs, data were analyzed inductively from a constructivist stance. Participation in the programs enhanced well-being through welcoming places, a sense of belonging, and positive feelings developed through doing. Connection to living things and responsibility for plants grounded participants in the present and offered a distinct venue for learning about gardening and about themselves. The paper concludes that practitioners and service-users should collaborate to develop leadership, programs, places, and processes within community gardens to support well-being.

James J. Connolly · · United States (California)

This case study examines the leading edge of gentrification along San Francisco's Third Street T streetcar line. Bayview-Hunters Point (B.V.H.P.), the end of the streetcar line's first phase, is an ethnically mixed, working-class neighborhood and the last historic concentration of African American residents in San Francisco. While gentrification-driven change is already visible further up the line, its presence in B.V.H.P. remains comparatively shallow so far. Nonetheless, many residents and community activists perceive that a fast-moving gentrification frontier leaves them with a conundrum: remain in a contaminated, post-industrial, climate-exposed environment, or advocate for their health while risking displacement. The neighborhood has seen greening such as community gardens and a waterfront promenade, alongside inequalities including enduring racial segregation, environmental privilege, green gentrification, luxury development, climate-related health risks, and continued exposure to contamination.

In-Kyoung Hong, Hyung-Kwon Yun, Young-Bin Jung, Sang-Mi Lee, Choon-soo Lee · Journal of people, plants, and environment · South Korea

A contactless online survey of 1,010 parents of elementary, middle, and high school students across Korea's five major districts, conducted October 22-26, 2020 (5 days) by a Korean survey agency (M), analyzing the data with SPSS for Windows 25.0 and Excel. Respondents averaged 1.83 (children per household), and 52.8% were male. 55.3% were aware of education services using school gardens, and 27.9% had experienced such a service. Overall, 79% considered the service necessary; among parents who had experienced it, 91.8% said it was necessary. Of all respondents, 54.9% were willing to pay for school garden costs; when income tax was used as the payment method, the average willingness to pay was 13,193 KRW, equivalent to a 2.02% tax rate. Parents who had experienced the service showed higher perceived need and willingness to pay than those who had not, but their actual stated amount or tax rate was lower because they knew how the program was actually run.

Sanyam Arora, Luv Sethi, Shruti Agarwal, Vimal Kumar · · Global

This book chapter describes how Internet of Things (IoT) sensors can monitor temperature, water, humidity and other parameters to increase food production quality and quantity while reducing manual labor and saving time and resources for urban gardeners. It presents no original data, measurements, or study population.

Ana Maria Girotti Sperandio, Ângela Alessandra Torezan Silingardi, Giovanna Gastaldo Cifoni, Rafael de Souza Salomão · ˜The œurban book series · Brazil

This chapter reviews Brazilian urban planning responses to COVID-19, connecting concepts of healthy cities, reviews of Brazilian legal frameworks, international documents, and case records to argue that articulation and cooperation among cities were essential to minimizing pandemic impacts. It presents active mobility initiatives, reframed public space use, and the implementation of urban community gardens as practical examples with immediate results during the pandemic, without reporting original quantitative data.

TP Modibedi, MMS Maake, MR Masekoameng, SS Tekana, Oluwaseun Samuel Oduniyi · African Journal of Food Agriculture Nutrition and Development · South Africa

This quantitative study surveyed vegetable consumption patterns among 254 randomly sampled urban farmers from 30 community gardens (418 registered farmers) across six large townships in Emfuleni Local Municipality, Gauteng province, South Africa. Data were collected via face-to-face semi-structured questionnaires using 24-hour dietary recall and analyzed with SPSS version 23 using descriptive statistics and ordered logistic regression. 96.1% of farmers consumed vegetables as a relish and 93.3% as salad, most often at dinner because farmers were typically present in the gardens during the day. Of 10 independent variables tested, only age group, education level, and main income source showed a statistically significant positive association with consumption patterns. The study recommends incorporating vegetables into all three daily meals and providing education on the importance of vegetable consumption.

Midori ASAOKA · Japanese Journal of Environmental Education · United States (California)

This paper traces the history of the Life Lab program in Santa Cruz, California, United States, and re-evaluates it from a sustainability education perspective. Life Lab, a non-profit established in 1979, grew out of "Nature Study" in an elementary school garden into a science-based environmental and sustainability education program emphasizing pupil-centered, experiential learning and critical thinking to build connection to the Earth; participants learn ecological soundness, key agroecology concepts, and relationships among insects, flowers, vegetables, other foods, and humans. The paper discusses farmers' markets, community-supported agriculture (CSA), and the Community Agroecology Network (CAN) in the Santa Cruz area as examples of organic and agroecological movements, arguing that direct producer-consumer relationships foster alternatives to the global corporate market, and proposes introducing sustainability education into Japanese food and agriculture education by building school gardens.

Yvonne Ma, Jessica Chen, Karen Fong, Stephanie Nadya, Kevin J. Allen, Chad Laing, Kim Ziebell, Ed Topp, Laura M. Carroll, Martin Wiedmann, Pascal Delaquis, Siyun Wang · Antibiotics · Canada

Genomic and phenotypic analysis of 55 Shiga toxin-producing E. coli (STEC) isolates of diverse serotypes, recovered from surface waters and sediments in a mixed urban/agricultural landscape in British Columbia, Canada (Antibiotics, 2021), found reduced antibiotic susceptibility across multiple drug classes: florfenicol (65.5%), tetracycline (52.7%), ampicillin (49.1%), streptomycin (34.5%), amoxicillin/clavulanic acid (21.8%), kanamycin (20.0%), ceftiofur (18.2%), trimethoprim-sulfamethoxazole (12.7%), gentamicin (10.9%), chloramphenicol (7.3%), ceftriaxone (3.6%) and cefoxitin (3.6%), while all isolates remained susceptible to ciprofloxacin, nalidixic acid, ertapenem, imipenem and meropenem. Eight isolates (14.6%) were multidrug resistant, and resistance genes including floR, dfrA, sul1/2, tetA/B, aadA, aph, blaTEM-1b and blaCMY-2 were identified alongside multiple plasmid replicon types. The resistance profiles matched those reported in generic E. coli from food animals, and the authors conclude that aquatic environments in the region are a potential reservoir for the maintenance and transmission of antibiotic-resistant STEC, their resistance genes, and associated plasmids.

Loren Alcorn · Proceedings of Student Research and Creative Inquiry Day · United States

A student research presentation on middle school students in the United States (2021) discusses the correlation between school gardens and nutrition education, asking whether students relying on school lunches actually benefit from the nutrition standards those lunches must meet. It argues that a school garden would let students learn to grow their own food, encounter new foods, and interactively learn how different foods affect health, with garden produce potentially incorporated into cafeteria lunches. Citing existing evidence that greater access to fruits and vegetables increases consumption and that school lunches generate substantial food waste, it suggests that nutrition education and exposure to new foods through a school garden could reduce that waste; the presentation itself does not report original measured data directly testing the garden-nutrition education correlation.

Gabriela Eustáquio Lacerda, Julliany Lopes Dias, Guilherme Nobre Lima do Nascimento, Ilsamar Mendes Soares · Revista Brasileira de Plantas Medicinais · Brazil

Dried leaf bark and freeze-dried gel from Aloe vera grown in community gardens in Palmas, Tocantins, Brazil were analyzed for chemical composition, phytochemistry, and heavy metals. Moisture content ranged from 7.06 to 10.62%, ash from 13.62 to 32.63%, crude protein from 5.58 to 7.47%, lipids from 0.58 to 2.04%, and crude fiber from 16.22 to 16.49%. Phytochemical analysis identified gallic acid, catechin, gallocatechin, ellagic acid, naringin, myricetin, quercetin, and kaempferol. No heavy metals were detected in the samples analyzed. The authors note further research is needed on how seasonality affects these compounds.

Olga Romanova, Sarah Taylor Lovell · Urban Agriculture & Regional Food Systems · Global

This review assesses the capacity of woody species (trees and shrubs) used in urban food forests to accumulate polycyclic aromatic hydrocarbons (PAHs), heavy metals (HMs), and metalloids, given limited existing literature on food-safety risk in urban fruit- and nut-producing trees compared with annual crops. General trends identified were (a) lower risk of HM and PAH accumulation in woody species than in vegetables, and (b) less accumulation in the fruit of woody species than in other parts of the same species. However, these trends are not always consistent, and accumulation depends on factors such as the concentration of a given contaminant in the environment, contaminant type, and species or variety. The review states there is a critical need for more research on the safety of growing edible fruits and nuts on trees and shrubs in contaminated urban environments.

Lilian Nadja Silva Brito, Renally Cristine Cardoso Lucas, Fernanda Ferreira de Andrade, Ygor Alexandre Beserra Sousa, Rilva Suely de Castro Cardoso Lucas, Renata Rocha Cardoso Madruga, Gabriella Barreto Soares · Revista da ABENO · Brazil

This article reports the experience of a group of dentistry students at the State University of Paraíba, Brazil, who, in the second half of 2018, formed a "health-promoting space" bringing together culture and art with the Unified Health System (SUS) at the Argemiro de Figueiredo Family Health Unit (USF) in Campina Grande. The space was built through an experience titled "Graffiti that brings life" and through the process of building a community garden at the USF. The activities were marked by strong interaction among students, the community, the health team, and local social resources, and they strengthened the bond between the health team and the population. The presence of dentistry students in primary care was observed to be important, with students recognizing that the dentist's role in primary care extends beyond providing oral health assistance.