Research & reports

Filkobski I., Rofè Y., Tal A. · Urban Forestry & Urban Greening · Israel

A survey of 44 community garden coordinators across Israel found that community gardens serve as community anchors and sites of encounter for diverse urban populations. The study documented their characteristics and functions within the Israeli urban context.

Nicklett E.J., Anderson L.A., Yen I.H. · Journal of Applied Gerontology, 35(6):678-690 · Global

A scoping review of studies published 2000–2013 examining links between planned gardening activities and older adults' physical health. Of eight eligible studies, four assessed energy expenditure and four assessed physical functioning, indicating gardening can contribute to older adults' physical activity and functional maintenance. It grounds the case for urban gardens and community plots as sites for older adults' health promotion.

Victoria Egli, Melody Oliver, El‐Shadan Tautolo · Preventive Medicine Reports · New Zealand (Auckland)

From April to August 2015, a model illustrating the many wellbeing benefits of community garden participation was developed based on a global, critical literature review. This model grouped the benefits into factors influencing the nutritional health environment and factors influencing the social environment. In October 2015, the model was presented to a diverse group of community members in the Tāmaki region of Auckland, New Zealand, to test its comprehension and gather feedback.

Helena Nordh, Kristin Tuv Wiklund, Kaja Elisabeth Koppang · Landscape Research · Norway

This study interviewed 33 plot holders in Oslo, Norway, to explore their reasons for engaging in urban allotment gardens (AGs) and the perceived benefits. Reasons included a desire for a safe play environment for children, a place to cultivate, and outdoor contact. Benefits were related to meaningful activities, social networks, and respite from urban life, indicating physical and psychological health benefits.

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.

Florence Chimbwanda · Journals & Books Hosting (International Knowledge Sharing Platform) · Zimbabwe (Masvingo)

This study investigated participants' attitudes and perceptions toward urban gardening in Mucheke town, Masvingo, Zimbabwe, using questionnaires, focus group discussions, and field observations with a sample of 40 participants. It found that urban gardening is important for the community and income generation, with participants reporting benefits like additional income, family consumption, and socialization. However, participants identified challenges including theft, dilapidated canals, a single water point, and limited market access.

Janina Borysiak, Andrzej Mizgajski · DOAJ (DOAJ: Directory of Open Access Journals) · Global

This study identified 64 cultural ecosystem services provided by urban allotment garden ecosystems. These services fit into the lowest level of the CICES v.4.3 classification, representing class types within one section, two divisions, three groups, and eight classes. All identified services were tabulated and discussed in light of the latest scientific publications.

P. Antwi Agyei, Jeroen H. J. Ensink · Journal of Science and Technology (Ghana) · Ghana (Accra)

A study in Accra, Ghana, from September 2012 to August 2013, analyzed 323 soil and irrigation water samples and 501 produce samples for E. coli, and interviewed 693 participants. It found irrigation water was significantly more contaminated than farm soil, and over 80% of produce samples were contaminated with E. coli, with street food salad being the most contaminated. Key risk factors included farm soil, wastewater use, and poor hygiene, while consumers did not prioritize health indicators despite high risk awareness.

Ranjan Datta, Rebecca English · · Global

This auto-ethnographic study explores the role of community garden activities in bridging formal and informal learning for urban children's science and environmental education. Based on five years of community garden activities, the author found that these practices promote relational learning methods and adhere to forms of agency such as embracing diversity, sharing power, and trust building. The study offers insights for environmental educators aiming to incorporate ethnic diversity and engage children in research leading to community action.

Terry Hartig, Peter H. Kahn · Science · Global

Natural features, settings, and processes in urban areas can help reduce stress associated with urban life. Public health benefits from street trees, green roofs, community gardens, parks, open spaces, and extensive connective pathways for walking and biking. Such urban design provisions also yield ecological benefits, both directly and by shaping attitudes toward the environment and environmental protection.

Anbuchchelvi Kalaiarasan · Indian Journal of Science and Technology · Global

This study aimed to strengthen urban landscapes with green infrastructure using passive sustainable practices to improve urban health and safety. It identified 30 micro-level passive techniques, such as xeriscaping and green roofs, which utilize natural processes and limit active energy use. The research compared the environmental effects of these techniques for existing and proposed urban landscapes, concluding that conserving soil, water, air, energy, and species is key to connecting fragmented landscapes into a unified urban green mass.

Godswill Azinwie Asongwe, Bernard Palmer Kfuban Yerima · Greener Journal of Soil Science and Plant Nutrition · Cameroon (Bamenda)

This study analyzed heavy metal levels (chromium, manganese, lead, cadmium) in 21 urban and peri-urban agricultural wetland soil samples in Bamenda municipality, Cameroon. Average concentrations were 35.73 mg/kg for chromium, 0.08 mg/kg for manganese, 30.64 mg/kg for lead, and 0.45 mg/kg for cadmium. These concentrations were generally lower than the maximum WHO permissible levels.

Valerie Calberry, Ingrid E. Lofgren, Lori F. Pivarnik · Journal of Media Literacy Education · Global

The Food Safety and School Garden Program (FSSGP) developed a curriculum integrating food safety into school garden activities for elementary students. A two-lesson intervention with 194 students in grades 1-5 showed an increase in correct responses on a 10-question test from 5.6 to 8.1 (P < .001). Most students rated activities as satisfactory or better and communicated learned topics to their parents.

Maria Fernanda Pessoa, Paula Scotti‐Campos, Isabel P. Pais, Ana Feteiro, Daniela Sílvia de Oliveira Canuto, Manuela Simes, João Pelica, Inês Maria Mantinhas Pataco, Vânia Ribeiro, Fernando H. Reboredo, José C. Ramalho, Fernando C. Lidon · Emirates Journal of Food and Agriculture · Portugal

The nutritional profile of "Tronchuda" or Portuguese cabbage produced in urban horticultures from 4 regions of mainland Portugal was studied, along with elemental soil analysis of each sampling site. This study revealed significant interactions between essential elements in soil and plant leaves, the edible part of the plant. In general, these leaves contained poor concentrations of Fe and Si, while Mn was absent, regardless of the sampling sites. Conversely, Ca levels were abundant, ranging between 3.3% and 3.9%. Soils from CAP showed a nutrient exhaustion of Fe, Mn, and Mo, although the highest protein and sucrose contents in the leaves were observed in plants growing in those soils. Protein, lipids, and carbohydrates concentrations differed according to sampling site, reflecting different production practices.

Hardiyanto Hardiyanto, Constancio C. de Guzman · Indonesian Journal of Agricultural Science · Philippines (Metro Manila)

This study investigated the levels and distribution of lead (Pb) and cadmium (Cd) in white cabbage, soil, and irrigation water from urban agricultural sites in Las Piñas and Parañaque, Metro Manila, Philippines. Field areas were divided into three sections based on distance from the main road (0, 25, and 50 m), and metal contents were measured by Atomic Absorption Spectrophotometry. The average Pb content (1.09 µg g-1 dry weight) in white cabbage was highest immediately beside the main road, with a similar trend in soil. A negative relationship was found between distance from the main road and Pb and Cd contents in white cabbage and soil. While overall concentrations of Pb and Cd in white cabbage, soil, and irrigation water were within acceptable limits, further study on heavy metal contamination in crops, especially those grown along main roads, was suggested.

Kafeel Ahmad, Zafar Iqbal Khan, Asma Ashfaq, Ameer Khan, Hazoor Ahmad Shad, Mujahid Sher, Zahoor-ul-Hassan Dogar, Ijaz Rasool Noorka, Sumaira Yasmin, Vincenzo Tufarelli, Eugenio Cazzato · The Philippine Agricultural Scientist · Pakistan

This study analyzed heavy metal and metalloid levels in soil and cabbage (Brassica oleracea) from two urban farming sites in Sargodha, Pakistan, irrigated with wastewater. Findings showed that mean concentrations of arsenic (As) and cadmium (Cd) in soil, and manganese (Mn), nickel (Ni), copper (Cu), zinc (Zn), molybdenum (Mo), cadmium (Cd), and lead (Pb) in cabbage, exceeded permissible limits at both sites. Significant differences were observed in metal and metalloid levels in vegetable samples between sites.

Noëllie W. Kpoda, Mariam Sou Dakouré, Boubacar Savadogo, Amadou H. Maïga, Jean-Noël Poda, G.B. Kabre · Journal of Water and Environment Technology · Burkina Faso (Ouagadougou)

This study in Ouagadougou, Burkina Faso, compared the parasitological characteristics of wastewater at a treatment plant's inlet and outlet, and in an open channel conveying treated wastewater to a garden site. Non-viable parasite cysts or eggs were found at the treatment plant, but viable parasite cysts and eggs were detected in the open channel. An epidemiological study demonstrated that open defecation by highly infected individuals within the garden site caused recontamination of the treated wastewater.

Sook Mee Lee, In Ho Kim · Journal of people, plants, and environment · Global

This study aimed to establish principles for community garden space planning to improve the self-support capability of vulnerable groups. Considering the circumstances of homeless individuals, 13 universal design principles were applied, integrating concepts of healing gardens and urban agriculture. The principles include maximally efficient space division for various programs, privacy-protected spaces, rest areas for strengthening resilience and health, pleasant spaces with plants, easily accessible and safe spaces, and easy maintenance and sustainability. For the ultimate goal of financial self-support, spaces for developing acquired skills and engaging in productive activities were also included in the principles.

Tom Beer, Brenda B. Lin, A.E.J. McGill · Water science and technology library · Global

This chapter considers the effects of climate change on food production, with particular reference to urban agriculture and its associated impacts on food security. The value of urban agriculture to the health and nutrition of developing and developed countries is described. The current status of related research by international agencies is outlined, and their omissions are highlighted. Proposals are made as to how these overlooked areas of research might be addressed.

Yeon Seon Kim, Sin Ae Park · Journal of people, plants, and environment · Global

This study investigated the effectiveness of a horticultural activity program for mothers to improve mother-child relationships, involving 60 mothers with children aged 4-7 years. The experimental group (n=30) attended six weekly 90-minute sessions, while the control group (n=30) did not. After the program, the experimental group showed statistically significant improvements in parenting stress, self-esteem, and parenting efficacy, but no significant difference was found in emotional empathy.

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

This study, conducted from September 2012 to August 2013 with 490 respondents in Accra, Ghana, assessed knowledge and awareness of wastewater use in urban agriculture. It found low awareness of irrigation water sources among consumers and street food vendors, and low health risk awareness among farmers, despite high awareness among salespersons and consumers. Crucially, consumers did not prioritize health indicators when purchasing produce, and farmers' health risk awareness did not influence their adoption of safer practices.

Nam-Sick Jung, Yong‐Hak Lee, Eun-Jee Kang, Yong-Geun Kim · 농촌지도와 개발 · Global

This study verified the effect of urban agricultural practice on factors of adolescent problem behavior. Quantitative research showed that urban agricultural practice improved self-worth by 16.7%, reduced depression by 28.1%, and improved sociality by 19.4%, with statistical significance confirmed in all lower measures. Qualitative research found overwhelmingly positive changes or maintenance in sentence completion tests and confirmed a positive change of mind in adolescent communication, cognitive and problem-solving abilities, and participation through observation of program participation behavior.

Emad Abdulrahman Al-Heety, Kadhim H. Yassin, Safa Abd-Alsalaam · Human and Ecological Risk Assessment An International Journal · Iraq (Baghdad)

This study evaluated the health risk of heavy metals (Cd, Cr, Cu, Ni, Pb, Zn) in soils from 14 urban community gardens in Baghdad City, Iraq. The non-carcinogenic hazard index (HI) was below the threshold (HI < 1), indicating no non-carcinogenic hazard. However, the carcinogenic risk index (RI) for Cd, Cr, and Ni exceeded the unacceptable threshold (RI < 1 × 10−4), demonstrating a serious carcinogenic risk for children and adults in the study area.

Heather Ohly, Sarah Gentry, Rachel Wigglesworth, Alison Bethel, Rebecca Lovell, Ruth Garside · BMC Public Health · Global

A systematic review of 40 articles on school gardening programs found that quantitative research was generally of poor quality, with limited evidence for changes in fruit and vegetable intake based on self-report. Qualitative research, though of better quality, attributed a range of health and well-being impacts to school gardens, but more robust quantitative research is needed to support these findings.

Mujtaba Baqar, Nadia Jamil, Naveed Ahsan, Kiran Khanum, Abdul Qadir, Mariyam Zameer, Anam Khalid · Transylvanian Review · Pakistan (Lahore)

This case study investigated the impacts of heavy metals from wastewater irrigation on soil, groundwater, and leafy vegetables (Indian mustard, spinach, fodder) in the Charrar Drain catchment, Lahore, Pakistan. Samples were collected from seven sites. Drain water showed Cd, Cr, and Pb concentrations exceeding limits at most sites, and groundwater Cd concentrations also exceeded limits, though Cr and Pb were within permissible ranges. Soil samples contained Cd, Cr, and Pb, and leafy vegetables irrigated with wastewater showed varying heavy metal concentrations, indicating a heavy metal bioaccumulation issue that may exceed threshold limits.