Research & reports

Josh Beniston · The Knowledge Bank (The Ohio State University) · United States (Ohio)

An experiment on assessing and managing soil quality for urban agriculture was conducted during the 2011 and 2012 growing seasons on demolished vacant urban lots in Youngstown, Ohio. Soil compaction was identified as a primary constraint, with high bulk density values of 1.79 g cm⁻³ for in-ground plots and 1.55 g cm⁻³ for raised beds. Crop yield data from 2011 showed that both compost-amended and compost + biochar-amended plots had significantly greater crop yields than control plots, with compost + biochar plots achieving the highest harvest index values.

William E. Fry, M. T. McGrath, Abby Seaman, Thomas A. Zitter, A. McLeod, Giovanna Danies, Ian M. Small, Kevin Myers, Kathryne L. Everts, Amanda J. Gevens, Beth K. Gugino, Sara B. Johnson, Howard S. Judelson, Jean B. Ristaino, Pamela Roberts, Gary A. Secor, K. W. Seebold, K. Snover-Clift, A. Wyenandt, Niklaus J. Grünwald, Christine D. Smart · Plant Disease · United States

The 2009 tomato late blight pandemic in the eastern United States resulted in significant crop losses for many home gardeners and organic producers. This event led to widespread questions regarding its causes and differences from previous epidemics.

Toni Y. Sims-Muhammad · · United States (South Louisiana)

This project examined the impact of Hurricanes Katrina and Rita on existing food systems in Lafayette, Acadia, Evangeline, St Martin, and St Landry parishes, with a focus on home and community gardens. The researcher interviewed 57 home/community gardeners and farmers and conducted a survey on pre- and post-Katrina/Rita food sustainability problems, challenges, and perspectives on future food systems.

D. Z. Phillips, Heather I. Sullivan · ISLE Interdisciplinary Studies in Literature and Environment · United States

This collection of essays for ISLE assesses the material aspects of healthy economies, environments, and bodies, arguing that the traditional economic-ecological "health" dichotomy is insufficient. It finds that the determination of "healthy" is complex, as artificial environments can be benign, and even a flourishing community garden can have neglected produce going to waste. The essays explore how a large number of healthy human bodies can be detrimental to healthy environments.

A. Yusuf · · Nigeria (Lagos State)

This study assessed the attitudes of 50 women farmers towards urban agriculture in the Somolu local government area of Lagos State, Nigeria. Findings indicated that the women's attitude towards urban agriculture was extremely negative. Statistical analysis revealed a significant relationship between attitude and age, marital status, educational level, years of experience, and access to loans. However, farm size, annual income, access to labor, and access to inputs were statistically insignificant.

Evan Weissman · Syracuse University Libraries (Syracuse University) · United States (New York City)

This dissertation explores urban agriculture in Brooklyn, New York, using a mixed-methods analysis to investigate its historical changes, motivations for engagement, and outcomes. The study argues that Brooklyn's urban agriculture is limited by its neoliberal characteristics, which undermine its potential to build a radical political movement around food issues. While urban agriculture tends to reproduce neoliberalism, it simultaneously creates political possibilities through the assertion of public rights to cultivate the city and the potential of food to serve as a tool for building solidarities towards food justice.

Rabiul Islam, Chamhuri Siwar · Advances in Environmental Biology · Malaysia

This research analyzed the current situation and future potential of urban agriculture in Malaysia using a literature review. Study participants demonstrated a relatively greater awareness of environmental and community benefits of urban agriculture compared to food security, health, or economic benefits. Malaysian urban agriculture was found to be constrained by a lack of adequate land use planning, weak support for urban farmers, and an absence of an integrated development approach. Major challenges identified included perceptions of limited space, limited resources, and education.

Stefan Reyburn · Environnement urbain · Global

This abstract is an article on the challenges and prospects of urban agriculture, published in the journal Urban Environment via the Érudit platform. This abstract does not contain detailed content regarding specific challenges or prospects related to urban agriculture governance.

Y. Niang, S. Niang, Saliou Niassy, Y Dieng, Mohamed Gaye, K. Diarra · International Journal of Biological and Chemical Sciences · Senegal

This study assessed the effect of wastewater on the agronomical performance and hygienic quality of tomato and lettuce in Senegal, comparing it to tap water, irrigation modes, and fertilizers. While tomato showed no pathogenic germs with wastewater, lettuce watered with wastewater via aspersion contained significantly more pathogenic germs than those watered in draining mode. Significant differences in yield and fruit size were observed between lettuce treated with tap water and wastewater.

Yves Cabannes · Environment and Urbanization · Global

This action research, conducted by local teams in 17 cities across Latin America, Asia, and Africa, investigated how urban farmers finance their activities. The study found that urban farmers primarily rely on their own resources, and a lack of access to financing is a major bottleneck for maintaining and expanding their operations. It also identified gaps between farmers' needs and existing public and private financial practices.

Nancy Karanja, Mary Njenga, G.K. Mutua, Carl Johan Lagerkvist, E. Kutto, JJ Okello · Journal of Agriculture Food Systems and Community Development · Kenya (Nairobi)

A study in three peri-urban sites in Nairobi, Kenya, assessed heavy metal, nitrate, and pesticide residue levels in wastewater-irrigated kale. Elevated levels of boron, cobalt, chromium, copper, lead, zinc, and nickel were found in vegetables at two sites, with high soil loadings of nickel, arsenic, lead, chromium, copper, and zinc attributed to chicken manure. Pesticide residues of diazinon, cypermethrin, biternol, and profenofos exceeded permissible limits in kale at one site, suggesting consumers may ingest significant amounts of contaminants.

Danny Simatele, Tony Binns, Munacinga Simatele · Journal of Human Development and Capabilities · Zambia (Lusaka)

This field-based research in Lusaka, Zambia, examines the impact of climate change and urban governance on urban agriculture, which serves as a source of food and income for poor households amidst deteriorating economies. The study finds that urban agriculture is often excluded from urban development and planning policy, posing significant challenges for small-scale farmers to achieve food security. A lack of policies supporting the urban poor, combined with climatic changes like drought and flooding, makes it difficult for households to adapt to the changing urban environment.

Mary Caesar, Jonathan Crush, Trevor Hill · Scholars Commons (Wilfrid Laurier University) · South Africa (Msunduzi Municipality)

A study on food security in Msunduzi Municipality, South Africa, was part of AFSUN's baseline survey across eleven Southern African cities. The survey found that urban poor in Msunduzi are significantly worse off than those in Cape Town and Johannesburg, with one-third of households reporting frequent food shortages. Urban agriculture is not particularly significant in Msunduzi, and while supermarket supply chains dominate the food system, they do not meet the needs of the poor.

Sebastian U. Ugbaje, John O. Agbenin · International Journal of Environmental Studies · Nigeria

A pot experiment in Zaria, northern Nigeria, evaluated the chemical forms and phytoavailability of Cr, Ni, and Pb in savannah soil amended with two urban wastes and planted with sorghum. While urban waste application increased total metal concentrations in the soil, only Pb uptake by sorghum increased, with no corresponding increases for Cr and Ni. A single application of urban wastes significantly increased Pb uptake by sorghum, raising concerns about the long-term consequences of such applications in urban and peri-urban agriculture, especially regarding children's exposure to Pb.

Mirella Cultrera, Maria Christina de Mello Amorozo, Fábio Cop Ferreira · SITIENTIBUS série Ciências Biológicas · Brazil (Mato Grosso)

An ethnobotanical study in five peripheral neighborhoods of Santo Antônio do Leverger, Mato Grosso, Brazil, surveyed 135 households and detailed 30 to characterize food plant cultivation. Ninety-seven species from 38 families were identified across homegardens, fields, and empty lots. While some species were common, the similarity between species/varieties across households was generally below 50%, and many had low frequency, revealing a vulnerability to species loss despite social network circulation.

Silvio Caputo · Kent Academic Repository (University of Kent) · United Kingdom

This paper argues for a new role for urban agriculture in developed countries, focusing on environmental, social, and economic benefits. While urban agriculture can contribute to a low-carbon society and food access, it is not currently part of UK government strategies for food security. For urban agriculture to achieve its potential, it needs to become economically viable, requiring research into highly productive methods and business models utilizing local urban resources.

Monica J Kelly · Scholarship@Western (Western University) · Canada (Toronto)

An ethnographic study conducted in summer 2010 at HOPE community garden in Parkdale, Toronto, explored how collective belonging is built. The research found that differences and interpersonal conflicts within the garden were embraced as opportunities to strengthen community cohesion. Contrary to romanticized views of harmonious community gardens, the study revealed that conflicts, negotiation of differences, and institutional practices of inclusion and anti-discrimination significantly contribute to a successful and inclusive community project.

Mahbubur Meenar, Brandon Hoover · Journal of Agriculture Food Systems and Community Development · United States (Philadelphia)

This paper examines urban agriculture (UA) projects' role in addressing food insecurity in lower-income neighborhoods of post-industrial U.S. cities, using Philadelphia as a case study. While UA projects are vital, findings indicate concerns regarding their geographic, economic, and informational accessibility, social exclusion, and spatial mismatch between participants and neighborhood demographics. Challenges also exist in distributing fresh produce to impoverished populations and UA's economic contributions in underprivileged areas.

Iwona Makuch · Soil Science Annual · Global

This study investigated the influence of intensive horticulture on lead content and its fractions in soil profiles from house gardens, allotment gardens, and arable fields. It was not determined that the manner of usage had any influence on total lead content or its distribution in soil profiles. However, the usage manner did influence the content and distribution of lead fraction III, which is connected with organic matter, with humus horizons of garden soils showing the highest content.

Nate Millington · International Journal of Urban and Regional Research · United States

This article analyzes representations of urban nature in Detroit, Michigan, focusing on journalistic and photographic work over the past 5 years. These representations, part of a discourse on Detroit's decline, ultimately reflect dominant conceptual divisions between the city and nature. Journalists and commentators perceive nature in the city as a reflection of the city's absence rather than its materiality, suggesting an ambivalence about emergent urban ecologies.

Vide Adedayo · · Nigeria

A study of poultry waste management and utilization techniques in urban vegetable farms in metropolitan Lagos revealed that poultry waste is poorly collected, packaged, and transported. Proper knowledge on treatment is lacking due to insufficient skill, space, time, and capital. Furthermore, a significant difference was found between poultry waste utilization, crop yield, and revenue in the study area.

Mirelys Rodríguez Alfaro, Olegário Muñiz Ugarte, Bernardo Calero Martín, A. Álvarez, Francisco Martínez Rodríguez, Teudys Limeres Jiménez, Mercedes Orphee Montoya, Adriana M. de Aguilar Accioly · DOAJ (DOAJ: Directory of Open Access Journals) · Cuba

This study evaluated the heavy metal content of Cadmium, Lead, and Nickel in organic fertilizers (composts from urban solid waste) and substrates, and their effect on vegetables grown in organoponics in Havana and Guantánamo, Cuba. Composts obtained from unsorted urban solid waste and the substrates prepared from them were found to contain heavy metals, especially Cadmium and Lead, above maximum permissible limits. It was concluded that these products should not be used for food production, as these metals translocate to the edible parts of the cultivated vegetables.

Richard Wiltshire, Louise Geoghegan · Research Portal (King's College London) · United Kingdom

This chapter explores the social organization of voluntary urban food production in Britain, identifying two dominant modes: collective activities and individual allotment gardens. It notes that the organization of unpaid labor is an under-researched aspect and a key restraint on urban agriculture's expansion. The study found that relations between these two modes can be antagonistic, particularly when land is scarce.

Catherine Rwamba Githuku · Abstracts of postgraduate thesis · Kenya (Nairobi)

This study investigated soil and crop pollution levels resulting from untreated wastewater reuse for irrigation in Kibera and Mailisaba wastewater irrigation farms in Nairobi, Kenya. Analysis of irrigation water, soil, and crop samples (maize, kales, black nightshade, arrowroots) revealed that the Electrical Conductivity (EC) of irrigation water at Mailisaba exceeded recommended levels. Farmers reported adverse effects on crops due to wastewater quality, and despite awareness of health risks, many farmers confessed to not using protective clothing.

Anna‐Katarina Schilling, Helmut Hotzel, Ulrich Methner, Lisa D. Sprague, Gernot Schmoock, Hosny El‐Adawy, Ralf Ehricht, Anna-Caroline Wöhr, Michael Erhard, Lutz Geue · Applied and Environmental Microbiology · Germany

This study investigated the presence of zoonotic agents in small ruminants kept on city farms in southern Germany, sampling feces and nasal liquid from 48 animals (28 goats, 20 sheep) across 7 city farms and one activity playground. Findings revealed that 100% of sampled sheep and 89.3% of goats carried Shiga toxin-producing Escherichia coli (STEC). Staphylococcus spp. were detected in 75% of both sheep and goats, and Campylobacter spp. in 25% of sheep and 14.3% of goats. Neither Salmonella spp. nor Coxiella burnetii was found.