Research & reports

Adriana Díaz Caamaño · Academia XXII · Spain

This essay frames urban food cultivation and harvesting, once a common practice around human settlements in past centuries, as a new trend for urban sustainability amid an environmental crisis driven by city growth and its planetary impact. It argues that unsustainable agriculture is straining to feed a vast population with little awareness of the countryside or of its benefits for mental and physical well-being, but presents no specific study data or case findings.

Breno Giordane dos Santos Costa, Marcelo de Rezende Pinto · Revista Economia & Gestão · Brazil

An exploratory qualitative study using practice theory examined a community garden in the city of Betim, Minas Gerais, Brazil. Individuals involved in producing and consuming food from the urban community garden reported two categories of positive change: health as a tangible benefit and general well-being as an intangible benefit.

Miriam Elizabeth Mery-Ruiz, Gabriela Carmona Ochoa, Areli Lopez-Montelongo · Apple Academic Press eBooks · Mexico

Focusing on the Alameda Zaragoza district in Saltillo, Mexico, this study investigates the relationship between urban morphology and sustainability in the built environment. It used an ethnographic methodology involving qualitative social media research, collecting images and text through Microsoft Bing word searches and analyzing them with nubedepalabras software to identify semantic networks. The findings show that online communities' urban imaginaries offer insights into sustainability strategies, and the study recommends expanding the analysis to other case studies and including search results in additional languages.

Beata Sirowy, Deni Ruggeri · ˜The œGeojournal library · Global

An editors' introductory chapter to a book on urban agriculture research, situating the volume's thematic scope. The editors argue that, to achieve the greatest impact, opportunities to engage in urban cultivation should be widely accessible to all segments of the urban population and close to where people live. Because land in dense inner-city areas is scarce and costly worldwide, integrating urban agriculture into existing and planned public spaces is presented as the most feasible strategy for achieving this. The book aims to provide theoretical and practical insights on integrating urban agriculture into public space development, covering well-being impacts, design, organization, educational contexts, and urban planning.

Syamsudduha Syahrorini, Andriani Eko Prihatiningrum, Denny Irawan, Yanik Purwanti, Agus Hayatal Falah, Shaza Dyah Ayuni, Akhmad Mulyadi, Andika Wahyu Nugraha, Fajrian Moch Bintang · Community Empowerment · Indonesia

This community service program in Wedoro Village, Indonesia, worked with elderly residents and posyandu health-post cadres, whose most common health issues were diabetes, high blood pressure, and temperature-related concerns, providing education and training to enable independent health checks alongside outreach and urban farming training aimed at cultivating organic plants as an alternative medicine source. The program reports increased awareness of common metabolic diseases among the elderly and states that the urban farming training brought them joy and promoted improved health through greater activity and productivity, without presenting measured before-after health data.

Anne Kerber, Ivana Guarrasi, Hsinhuei Sheen Chiou, Sabrina Ehmke, Kristi Oeding, Sachi Sekimoto · Health Communication · United States

Drawing on the Garden EngAGEment community garden project at Minnesota State University, Mankato, this article develops the concept of "artful place-making" as an alternative, experiential approach to organizing and teaching care for people with Alzheimer's and related dementias, using arts-based research, place-based education, and sensory studies. It describes the interplay of knowing, making, and being in the garden as fostering a new culture of care in health professions training, multi-sensory connection, and personal, relational, and community transformation.

Ada Baldi, Nicolas Lucio Gallo, Anna Lenzi · Renewable Agriculture and Food Systems · Italy

Semi-structured interviews with participants in the "social gardens" of Prato, Italy — plots the municipality assigns to individual pensioners or unemployed people for growing vegetables for home consumption — examined demographic and socio-economic characteristics, cultivated crops, and plot areas. The typical gardener was male, retired, averaged 74 years old, and had a low level of education. A 50 m2 plot with 40% of its area cultivated was estimated to yield about 90 kg of vegetables per year, roughly 61.5% of one person's fruit and vegetable needs. Tomatoes occupied more than 80% of the cultivated area. Vitamin C and Vitamin A showed the highest nutrient contributions, while calcium and sodium showed the lowest.

Jane Yatuha, Justus Asasira, Godfrey Begumisa, Pascal Amandu · East African Journal of Science Technology and Innovation · Sub-Saharan Africa

This eight-week experiment, conducted from July to September 2023 in Mbarara city, Uganda, tested the capacity of greywater to serve as a hydroponic growing medium for vegetables (broccoli, spring onions, lettuce) and the greywater-cleansing capacity of Coleus ornamental plants. Greywater was collected from restaurant sculleries, and four treatments — greywater, greywater + NPK, tap water, and tap water + NPK — were each set up in triplicate, with pH, EC, TDS, temperature, turbidity, nitrates, phosphates, shoot length, leaf number, fecal coliforms, and heavy metals measured. All vegetables survived, but production levels differed significantly between treatments: lettuce had the highest production in three of the four treatments except greywater + NPK (ANOVA, F(3,56) = 2.970, p = 0.039), while spring onions grew best in greywater + NPK, differing significantly from other treatments (F(3,56) = 3.328, p = 0.026). Greywater treatments showed extreme EC and TDS values (1001.38 µS/cm and 502 ppm; 982.38 µS/cm and 490.75 ppm), significantly different from other treatments (p = 0.000), though no fecal coliforms were detected in vegetable tissue. Coleus progressively reduced TDS and EC and showed capacity to extract heavy metals from the greywater.

Brent F. Kim, Sara N. Lupolt, Raychel Santo, Grace H. Bachman, Xudong Zhu, Tianbao Yang, Naomi K. Fukagawa, Matthew L. Richardson, Carrie Green, Katherine M. Phillips, Keeve E. Nachman · PLoS ONE · United States

A pilot study (2024, PLoS ONE) planted Darkibor kale seedlings at three urban and four rural farms in and around Baltimore City, Maryland, had farmers grow them using their usual practices, and analyzed harvested kale for carotenoids, vitamins C and K1, ten nutritional elements, and eight non-essential metals. Sample sizes were in some cases too small to yield statistical significance, but the study identified potentially meaningful differences between urban and rural kale: mean carotenoid and vitamin concentrations were 22-38% higher in rural samples, while mean concentrations of eight nutritional elements were higher in urban samples, by as much as 413% for iron. Most of nine non-essential metals were higher on average in urban samples, though lead and cadmium concentrations across all samples stayed below public health guidelines; for six elements, variance within urban or within rural farms exceeded variance between the two groups, suggesting urbanicity may not be the primary driver of some differences, and some urban-rural gaps were more pronounced than in prior research.

Tatiana Hlinka · Journal of Student Research · United States

In New Jersey, 50 food desert areas face the most severe food insecurity across both rural and urban contexts. This study identified nine barriers to implementing urban agriculture initiatives in New Jersey's urban food deserts, using a sequential quantitative analysis combining a survey of food systems professionals with a GIS-based spatial analysis to identify the most prevalent barrier. Working in partnership with New Jersey urban agricultural organizations, the study found that lack of funding was the most commonly cited barrier to expanding urban agriculture initiatives. The GIS-based spatial analysis found that high-priority barriers varied by region, but that all organizations identified funding, or lack of access to funding, as a significant barrier regardless of whether they operated in a low- or high-income neighborhood. The study concludes that policymakers must reevaluate the role of urban agricultural organizations in New Jersey's urban food deserts.

Annamaria Gentile, Luca Di Stasio, Gianmaria Oliva, Giovanni Vigliottá, Angela Cicatelli, Francesco Guarino, Werther Guidi Nissim, Massimo Labra, Stefano Castiglione · Environmental Research · Global

A review examines the dynamics of antibiotic resistance (AR) in urban soils, cataloguing multiple sources that introduce antibiotics into urban soil, including domestic wastewater, industrial effluent and urban agricultural practices, as well as microplastics and domestic animal excrement. It states that the selective pressure from these anthropogenic sources promotes the proliferation of antibiotic-resistant bacteria through horizontal gene transfer among soil microorganisms, poses a significant public health threat by potentially transferring resistance genes to human pathogens via direct contact, food consumption and water ingestion, and disrupts microbial community dynamics in ways that affect soil fertility, plant growth and overall environmental quality.

Rioaldi Sugandhy, Ayi Yustianti, Yoga Nugraha, Rizky Prananda, Yuli Andriani · Indonesian Journal Of Aquaculture Medium · Indonesia

This literature-based, qualitative content-analysis study examined filtration systems used to maintain water quality in small-scale aquaculture ("urban farming" aimed at self-sufficient food security), covering mechanical media (cotton, dacron), biological media (bio balls, ceramic rings) and chemical media (activated carbon, zeolite). It found that the type of filter media used affects water quality, fish growth and survival, and that using vegetables as supplementary filtration also affected water quality.

Andree Wijaya Setiawan, Yohanes Hendro Agus, Nugraheni Widyawati, Endang Pudjihartati, Maria Marina Herawati, Suprihati Suprihati, Djoko Murdono, Kezia Natalia, Jonathan Galih Raka Kusuma, Sabrina Ayu, Exvaricha Exvaricha, Yuliana Pratiwi Asti · JMM (Jurnal Masyarakat Mandiri) · Indonesia

In Semarang Regency, Indonesia, a community-service programme delivered adult-learning (Andragogy) lectures and hands-on practice in urban-agriculture-based appropriate technologies to 50 participants, including high school students, high school teachers, PKK (family welfare) members and village officials, to address household-level stunting prevention. Post-activity questionnaire evaluation found 84% of participants gained knowledge related to the material, and 86% became skilled and wanted to apply what they had learned.

Maira Mubashir, Romaina Iqbal, Sabahat Naz · Journal of the Pakistan Medical Association · Asia

A commentary in the Journal of the Pakistan Medical Association argues that 82% of adolescents are at risk of non-communicable diseases due to physical inactivity and low fruit and vegetable intake, citing a Karachi study in which schoolchildren's consumption of discretionary foods exceeded their vegetable intake. The piece presents school kitchen gardens as a strategy to promote dietary diversification and vegetable consumption, describing them as an interactive platform where children plant, tend, and harvest produce while learning about vegetable types, growth, and nutritional value, and cites a prior systematic review reporting improved children's knowledge of food, nutrition, gardening, and science.

Gamal El Afandi, Hossam Ismael, Souleymane Fall · Sustainability · United States

Using a hybrid approach combining the HYSPLIT and AgDRIFT models, this study estimated organophosphate pesticide spray drift from corn and soybean fields into urban-agricultural interface communities in Sangamon County, Illinois, at both field and county scales. Preliminary findings indicate that all residential areas near agricultural land are at risk of pesticide drift, since buffer zones do not exceed 25 meters; of 34 water bodies (rivers, lakes, streams, and drains) within the 30,200-acre study region, 12 fall within the high-drift zone, and roughly 106 buildings across an estimated 10,300 km² were found to have potential exposure to drift.

Elżbieta Skorbiłowicz, Piotr Ofman, Mirosław Skorbiłowicz, Marcin Sidoruk, Urszula Tarasiuk · Water · Poland

This study assessed heavy metal contamination in 96 surface sediment samples collected from urban, agricultural, and forested areas of the Bug River catchment in Poland between July 2018 and 2020, measuring metals (Zn, Pb, Cr, Ni, Cu, Fe, Mn, Cd) by atomic absorption spectroscopy and applying the geoaccumulation index (Igeo), contamination factor (CF), and pollution load index (PLI). Urban sediments showed significantly higher heavy metal concentrations than agricultural or forested areas, with cadmium reaching up to 2.5 mg/kg; the average Igeo for cadmium was 0.24 in agricultural areas and 0.15 in urban areas, while the highest PLI values, reaching a maximum of 0.33, occurred in urban areas, and statistical analysis showed both urban emissions and agricultural activities significantly influenced heavy metal presence in the sediments.

Yang Tingting · The World of Chinese · China

This article profiles Clover Nature School, led by Professor Yuelai Liu, which is converting abandoned urban spaces across China into community gardens. The initiative has established over 1,000 gardens nationwide, with Shanghai aiming for 2,040. In one Urumqi case, a neighboring restaurant's monthly revenue rose from 120,000 to 180,000 yuan after a garden was created.

UCL Institute of Education · UCL Institute of Education · United Kingdom

A UCL Institute of Education article on a partnership with the RHS training primary-education student teachers to use gardening as a teaching tool, describing an activity suitable for a class of 30 and featuring comments from participating staff.

Camila Neves Lange, Bruna Moreira Freire, Lucilena Rebelo Monteiro, Marycel Elena Barboza Cotrim, Bruno Lemos Batista · Plants · Brazil (Santo André)

Sixty-four lettuce plants were collected from six urban garden sites in Santo André, Brazil, to measure potentially toxic elements and test household washing. Lead reached 0.77 mg/kg at the Capuava 1 site near an industrial complex, above the 0.1 mg/kg limit, with chromium and arsenic also elevated. Sodium-hypochlorite soaking worked best, removing 48% of lead, 46% of arsenic and 52% of vanadium, while plain water immersion removed about 30% of lead and arsenic and cadmium and chromium fell by under 10%. Total cancer risk for children exceeded acceptable thresholds at some gardens, and the authors conclude washing alone is insufficient and environmental source control is required. Roots were not analysed because gardeners did not want beds damaged.

Neetu Choudhary, Alexandra Brewis · Journal of Urban Health · Global South

A narrative review of 169 papers on food and nutrition in cities of low- and middle-income countries. Urban agriculture is the most common theme, and studies report gains in dietary diversity and food expenditure — but the review notes it is the relatively well-off, not the poor, who are found to practise urban agriculture, and land-access constraints exclude the poorest from those benefits. It also documents the nutrition transition toward processed, high-fat and high-sugar foods and a resulting double burden of malnutrition. Cash assistance shows promise during crises, but social protection alone is insufficient against food insecurity. Four evidence gaps are named: gender dynamics, WASH linkages, equity and intersectionality within cities, and the role of local government.

Benedicta Yayra Fosu-Mensah, Nathanael Nii-Odai Laryea, Daniel Darko, Michael Mensah · Heliyon · Ghana (Accra)

In the Greater Accra Metropolitan Area of Ghana, which generates about 2,291 tonnes of municipal solid waste daily (roughly 14% plastic), researchers analysed two municipal solid-waste composts, two dried sewage sludges and a reference soil with five replicates each. Microplastic loads were highest in sludge 1 at 4,316 ± 968 particles/kg, followed by compost 1 at 3,572 ± 1,196, compost 2 at 3,104 ± 418 and sludge 2 at 2,024 ± 562, against 232 ± 62 in the reference soil. Polyethylene, polyester and polypropylene dominated. The results show that returning urban organic waste to soil also carries microplastics into soils and crops. Limitations: only five sampling sources, and FTIR polymer identification applied to a 10% subsample.

Tracey D., Gray T., Sweeting J., Kingsley J., Bailey A., Pettitt P. · Health & Social Care in the Community (Wiley/Hindawi), 2023:5570089 · Global

The first systematic review to summarize the benefits of community gardening for vulnerable populations such as low-socioeconomic-status and culturally diverse groups. Analyzing 33 studies, it finds social connection, health, education, and nutrition to be the most frequently reported benefits, supporting social inclusion and welfare.

Landry M., Asigbee F., Vandyousefi S., Ghaddar R., Davis J. · Journal of the Academy of Nutrition and Dietetics, 123(3):637-643 · United States

A cluster randomized controlled trial in mostly low-income, Hispanic Texas elementary schools testing whether the TX Sprouts garden, nutrition and cooking intervention affected academic performance. It found the program did not harm academic outcomes, showing that garden-based food education can be integrated into instructional time without lowering achievement.

Iida A., Yamazaki T., Hino K., Yokohari M. · npj Urban Sustainability 3:4 · Japan

Focusing on Tokyo, the study quantitatively verified how access to local food through urban agriculture relates to residents' subjective well-being, physical activity, and food-security concerns during the COVID-19 pandemic. It showed that walkable-distance urban agriculture supported community health and food-system resilience.

国土交通省 · 国土交通省（令和5年9月策定） · Japan

The core strategy of Japan's Ministry of Land, Infrastructure, Transport and Tourism aiming to mainstream and 'build in' green infrastructure across all sectors with the public and private sectors working in tandem. It sets out seven perspectives—collaboration, community, technology, evaluation, finance, global and digital—and positions a broad range of spaces, including urban farmland and everyday greenery, as multifunctional green social infrastructure for stormwater management, disaster risk reduction, biodiversity, health and community.