Research & reports

Weisong Chen, Weixuan Xian, Guiying He, Zhongye Xue, Shaomin Li, Wenyan Li, Yongtao Li, Yulong Zhang, Xingjian Yang · Ecotoxicology and Environmental Safety · China (Guangzhou)

A study in seven districts of Guangzhou City, China, evaluated the large-scale occurrence and spatiotemporal distribution of 16 PAHs and 14 OPAHs in urban agricultural soils. Average concentrations of ΣPAHs and ΣOPAHs during the flood season (59.6 ± 31.1-213 ± 115.5 μg/kg) were significantly higher than during the dry season (42.1 ± 13.3-157.2 ± 98.2 μg/kg). Coal combustion and traffic emissions were identified as the dominant sources for these contaminants in both seasons.

Bethaney Turner · · Global

This chapter explored human-soil relations in urban home and community gardens through ethnographic fieldwork. While biodiverse soil offers direct health benefits, the presence of contaminated, toxic soils, prevalent in lower socio-economic neighborhoods, was shown to expose inequities in access to safe gardening sites and hinder the realization of potential therapeutic benefits. It argues that the therapeutic benefits of gardens are best realized when humans cultivate attentive relationships with myriad multispecies companions.

Jordi Guimera Garcia, Natalie Bray, Yowhan Son, Aleah L. Butler-Jones, Sara Perl Egendorf, Jenny Kao‐Kniffin · Journal of Urban Ecology · United States (New York City)

In New York City, a study investigated plant growth (tomato, pepper, kale) in soils constructed from four municipal composts mixed with sediments from the NYC Clean Soil Bank, to assess the potential for safe urban agricultural soils. While Clean Soil Bank sediments enhanced plant growth when mixed with BRL compost, they also negatively impacted tomato aboveground biomass production by 29% in LES compost and tomato plant height by 18% in QBG compost, indicating variable effects depending on compost properties.

Silvio Caputo, Victoria Schoen, Chris Blythe · Land · United Kingdom (London)

Data was collected from seven community gardens and one community farm in London, UK, during the 2019 and 2020 growing seasons using a citizen science approach, investigating crop yield, resource inputs, and social benefits. Results showed very mixed levels of crop and social productivity depending on organizational structure and agenda, with no clear pattern emerging. This study suggests that citywide productivity evaluations based on small data samples may not be reliable.

Gerhard Fischer, F. Fischer · Revista Colombiana de Ciencias Hortícolas · Global

This overview, based on the ScienceDirect database, addresses heavy metal (HM) contamination in vegetables from urban and peri-urban areas. It notes that HMs like Cd, Pb, Hg, Cr, and As accumulate to toxic levels in the soil-plant-consumer continuum, causing health damage to consumers and physiological alterations in plants. Leafy and solanaceous vegetables accumulate the most HMs, while cucurbits and legumes are least affected.

Jade Morkel, Noxolo Dumani, Nick Malherbe, Shahnaaz Suffla · Community Development · South Africa

This case study, conducted in a low-income South African community, explored how a community gardener engages with the social solidarity economy (SSE) using thematic analysis of triangulated data from an interview, participant observation, and a participatory film. The study analyzed how the community garden fostered solidarity and established alternative micro-economic practices. It also considered challenges facing community gardens when connecting with the SSE.

Do-Eun Kim, Gwang-Ryul Son, Ga-Hyoun Yu, Yong-Hoon Son · Journal of the Korean Institute of Landscape Architecture · South Korea (Seoul)

This study aimed to identify participation constraints perceived by school community members in urban farming activities using hydroponics and understand the structural relationships of variables influencing decision-making. Participation constraints were categorized into intrinsic, interpersonal, and structural factors. Hypothesis model verification results showed that interpersonal constraints significantly influenced participants' willingness to participate and their expected behavior.

Julia Reichl, Christina Proßegger, Bernhard Eichholzer, Pamina Plauder, Maria Sophia Unterköfler, Karin Lebl, Alexander Indra, Hans‐Peter Fuehrer · Parasitology Research · Austria

In allotment gardens and a second location in Graz, Styria, Austria, citizen scientists collected adult Aedes albopictus mosquitoes and eggs, which underwent morphological examination and DNA barcoding. A total of 217 eggs and 14 adult specimens were found, indicating that Aedes albopictus is already breeding in Graz. However, continued monitoring efforts are needed to determine if stable populations can survive there.

Eri Saikawa, Erin Lebow-Skelley, Rosario Hernandez, Faith Flack-Walker, Leann Bing, Candis M. Hunter · Journal of Public Health Management and Practice · United States (Atlanta)

In Atlanta, Georgia, in-person and virtual Soil Screening, Health, Outreach and Partnerships (soilSHOPs) were implemented through a community-engaged partnership to screen soils for lead. These soilSHOPs informed best practices for increasing awareness about lead exposure and led the US Environmental Protection Agency to identify a Superfund site, confirming soil lead contamination.

MS Alam, Silpa Mullakkalparambil Velayudhan, Debpriyo Kumar Dey, Chiamaka Adilieme, Pradeep Kumar Malik, Raghavendra Bhatta, Sven König, Eva Schlecht · Tropical Animal Health and Production · India (Bengaluru)

A study in Greater Bengaluru, India, interviewed 151 dairy farmers and analyzed 97 forage samples from 10 lakes and vegetable leftovers to assess urbanization's impact on cattle health. While lake fodder was nutritionally high-quality, 43% of samples contained toxic heavy metals above critical levels. Logit models showed that insufficient drinking water and lake fodder negatively impacted cattle health, despite 60% of farmers believing their cows were healthy.

Svetlana Hristova-Vladi · Postmodernism Problems · Bulgaria

The book "Urban Agriculture for Improving the Quality of Life. Examples from Bulgaria," edited by Donna Pickard, explores the real versus potential effects of urban agriculture on the welfare of urban and nearby communities. This multidisciplinary study analyzes the interplay between urban agriculture practices and quality of life through social, educational, economic, spatial, and ecological aspects. It also delves into the historical dimension of urban agriculture in Bulgaria, including examples from Sofia in the 1930s.

Oekan S. Abdoellah, Indri Wulandari, Kinanti Indah Safitri, Nafa Destri Fianti, Rahma Maulia Fadli Basagevan, Mega Nurul Aini, Rosalina Ilmi Amalia, Mahardhika Puspa Arum Suraloka, Gemilang Lara Utama · Sustainability · Indonesia (Bandung)

Commercialization of urban agriculture (UA) in the Great Bandung region has led to the displacement of small-scale farmers and reduced access to local food, exacerbating food insecurity among low-income residents. Subsistence farmers (48.91%) earned only 7.14% to 14.64% of the 2023 minimum wages, and food insecurity prevalence was predominantly observed after UA practices. The study also found a surplus of vitamin A among urban farmers, while inadequacies in other nutritional aspects were prevalent.

Adane Sirage Ali, Sirak Robele Gari, M.L. Goodson, Claire Walsh, Bitew K. Dessie, Argaw Ambelu · PLoS ONE · Ethiopia

This cross-sectional study investigated the prevalence and risk factors of diarrhea among children under five in 402 wastewater irrigation farming households in Addis Ababa, Ethiopia, from November 2021 to February 2022. The overall prevalence of diarrheal cases in children under five was 22.3%. Diarrhea was strongly associated with wastewater-related occupational exposure factors, including body washing with irrigation water, contaminated cloth with irrigation water, use of protective clothing during farm work, use of farm work cloths at home, and bringing unwashed farm tools home.

Marek Hekrle, Jan Macháč, Lenka Dubová · Resources · Czechia

This study investigated how ecosystem services (ES) provided by the community garden 'Žížala na Terase' in Czechia are affected during crises related to the COVID-19 pandemic and increased food prices. Results indicated that the importance of social interaction and educational ES significantly decreased in the COVID-19 scenario. Conversely, the role of community gardens as places for recreation increased. In the food self-provisioning scenario, provisioning ES increased at the expense of recreational ES. Economic assessment further showed that cultural ES were the most monetarily valued, followed by provisioning ES.

Clemêncio Nhantumbo, Nídia Cangi Vaz, Mery Rodrigues, Cândido Manuel, Sífia Rapulua, Jéssica Langa, Hélio Nhantumbo, Dominic Joaquim, Michaque Dosse, José João Sumbana, Ricardo Santos, Sílvia Monteiro, Dinis Juízo · Water · Mozambique

A study investigated fecal microbial contamination levels in river water, drainage water, and drinking water in the Infulene River Basin, Mozambique. Samples from the Infulene River and drainage showed 82% positive for Total Coliforms and 61% for Escherichia coli, while drinking water samples were 63% positive for Total Coliforms and 23% for Escherichia coli. The study confirmed a high vulnerability to microbial contamination across all investigated sources due to poor sanitation and a lack of drainage infrastructure.

Annie Stéphanie Nana, Timo Falkenberg, Andrea Rechenburg, Joshua Ntajal, Juliet Wanjiku Kamau, Anne Ayo, Christian Borgemeister · Environmental Geochemistry and Health · Cameroon (Yaoundé)

This study assessed the seasonal characteristics and ecological risks of potentially toxic elements (Cu, Pb, Zn, Cd, Cr, Ni) in urban agricultural soils across four lowlands in Yaoundé, Cameroon. Concentrations of Cu, Pb, Zn, and Cr exceeded recommended thresholds in some or all areas, with Cr exceeding thresholds in all areas during both seasons. One area recorded strong soil pollution (grade V) during the wet season, indicating that preventive action is needed to limit heavy metal contamination in the lowlands of Yaoundé.

Issaka Senou · Journal of Applied Biosciences · Burkina Faso

This study assessed heavy metal bioaccumulation in cabbage grown on the Dogona market garden perimeter in Bobo-Dioulasso, Burkina Faso, using a randomized block design with urban solid waste treatments. The results showed high levels of cadmium, copper, and lead in cabbage leaves, with concentrations significantly exceeding WHO standards across all treatments. A critical finding was that consuming this cabbage poses a high health risk to consumers due to significant ingestion of cadmium and lead.

Deni Permana · ANTASENA Governance and Innovation Journal · Global

This analysis evaluated the impact of school garden programs on students' nutritional status and nutritious food intake, using surveys, interviews, and nutritional status measurements before and after program implementation. School gardens positively impacted students' nutrition knowledge and increased fresh fruit and vegetable consumption, contributing to a reduction in malnutrition prevalence with significant increases in children's weight and height. However, the program's success was constrained by budget limitations and a lack of training for educators, highlighting the need for adequate training, stable financial support, and curriculum integration.

Nicholas Greatens, Nick Klejeski, Les J. Szabo, Yue Jin, Pablo D. Olivera · Plant Disease · United States (Minnesota)

In July 2021 and July-October 2022, rust disease was observed on all 20 lemongrass plants in a community garden near Mankato, Minnesota, USA, causing 5-50% leaf loss. Molecular analysis of the rust fungus identified it as Puccinia cesatii or a closely related species. Although P. cesatii has been reported on Cymbopogon species, lemongrass is not generally considered a host, indicating an unusual infection.

Sinan Kordon, Patrick Miller · ArtGRID - Journal of Architecture Engineering and Fine Arts · United States (Roanoke)

A survey in five disadvantaged neighborhoods of Roanoke, Virginia, identified primary reasons for non-participation in community gardening. Using descriptive statistics, T-test, and factor analysis, the study found that "theft and damage," "difficult access," "too much effort," and "no personal interest" were the main deterrents. These findings highlight specific barriers to public involvement in community garden projects.

Seohyun Kim, Carlos Almeida Peña · Journal of Student Research · United States

This study critically evaluated existing initiatives like SNAP, HFFI, and urban agriculture for addressing food deserts in the United States, which affect approximately 19 million individuals. Through a literature review and interviews, the research found that these programs, while offering some positive impact on food insecurity, largely fail to directly address the fundamental issue of distance and systemic accessibility to supermarkets. The study proposes enhancing public transit and online delivery platforms as comprehensive solutions.

Katarzyna Świąder, Dražena Čermak, Danuta Gajewska, Katarzyna Najman, Anna Piotrowska, Eliza Kostyra · Sustainability · Global

This review analyzed opportunities and constraints for creating edible cities and accessing wholesome functional foods sustainably. While urban food production methods like controlled-environment farms and home gardens exist, significant constraints include pollution, a lack of government support, and economic challenges for urban farms. These issues must be resolved for edible cities to become widespread.

Yosef Abebe, Mulugeta Gashaw, Asenake Kefale, Tim Brewer · Water Reuse · Ethiopia

A study on wastewater governance in the upstream catchment of the Awash Basin, Ethiopia, found that untreated wastewater discharged from industries is polluting rivers and the surrounding environment. Regulatory bodies have done little to enforce rules and directives for wastewater regulation, and due to poor implementation of laws, urban agriculture is expanding without concern for its negative health and socioeconomic impacts.

Njenga John Ng’ang’a, Mukundi John Bosco, Masinde Peter Wasike, Kihurani Agnes Wanjiru · Journal of Agriculture Science and Technology · Kenya (Nairobi)

A study in Nairobi's eastern zone assessed heavy metal occurrence in urban farm inputs and food crops (tomatoes, arrowroots, kales). Cadmium, manganese, lead, and zinc concentrations were analyzed in soil, water, and crop samples. The study found that heavy metal contents, particularly cadmium, manganese, lead, and zinc, were above allowable limits in several crops, and based on FAO/WHO standards, were high for health concern.

Amy Russell, Ziqi Li, Mingshu Wang · International Journal of Applied Earth Observation and Geoinformation · United Kingdom (Glasgow)

This study investigated the distribution of urban agriculture in Glasgow, Scotland, UK, finding that existing projects are mostly centrally located, covering 36% of the total population (approximately 635,000) within a 10-minute walk. A positive correlation was found between walking travel time to the nearest urban agriculture project and food desert status, indicating access disparity. Using the Maximal Covering Location Problem model, the research identified that a minimum of 15 new urban agriculture projects on vacant and derelict land could increase population coverage to 49% and equalize access disparity to a statistically non-significant level.