Research & reports

Rachel Slocum, Arun Saldanha · · Global

An edited collection (2013) argues that an unacknowledged racial dimension underlies the production and consumption of food under globalization, examining this across three "socio-physical spatialities"—fields, bodies, and markets—through international, multidisciplinary case studies. The volume states that human groups become entrenched in racial hierarchies through food at scales ranging from the household to the slave trade and empire, and includes a chapter specifically addressing urban agriculture and race in South Africa (by Jane Battersby) among contributions covering topics such as bracero labor in California and food-justice organizing in Newtown. The abstract presents this as the collection's conceptual argument rather than as findings from a single empirical study.

A. Bryan Endres, Rachel Armstrong · Food Studies An Interdisciplinary Journal · United States

A legal analysis (Food Studies: An Interdisciplinary Journal, 2013) of Community Supported Agriculture (CSA) in the United States—where CSA participation more than doubled between 2004 and 2009—examines "volunteer-for-food" arrangements and unpaid internships that many CSA farms offer in exchange for labor. It finds that these arrangements do not align cleanly with federal and state employment laws governing minimum wage and workers' compensation, creating a mismatch between the community-participation model embedded in CSAs and the legal regimes that govern them. The paper identifies potential points of flexibility within existing law, explores mechanisms for farmers to avoid regulatory liability, and concludes with policy recommendations to eliminate regulations it characterizes as scale-inappropriate for CSA expansion.

Ruth Stewart, Marcel Korth, Laurenz Langer, Shannon Rafferty, Natalie Rebelo Da Silva, Carina van Rooyen · Environmental Evidence · Global

This is a systematic review protocol — not a completed review — that sets out methods for identifying, appraising and synthesizing evidence on how urban agriculture programs affect food security and nutrition in low- and middle-income countries. It notes urban agriculture is widely promoted as providing the urban poor with food and income while improving the urban environment, but also carries potential disadvantages: use of wastewater can contaminate produce, intensive irrigation can spread malaria and water-borne disease and strain limited water supplies, and soil erosion and intensive fertilizer/pesticide use can pose health risks and environmental damage. Despite the current policy drive to promote urban agriculture, the paper states that the evidence base for its benefits and harms is not well understood. As a protocol, it reports planned search, screening, bias-appraisal and synthesis methods rather than results.

Léon W. Nitièma, Boubacar Savadogo, Dramane Zongo, Aminata Kaboré, Poda Jean Noël, Alfred S. Traoré, Dayéri Dianou · Journal of Environmental Protection · Africa

This study examined the microbial quality of wastewater used for truck farming in Ouagadougou, Burkina Faso, testing for bacterial and parasitological fecal indicators during the dry-hot season (May) and the wet season (July) of 2012. Wastewater from three water reservoirs and two canals intensively used for truck farming was analyzed, and the same indicators were tracked through waste stabilization ponds at three treatment plants in the city. Concentrations of microbial indicators were significantly higher in the dry-hot season than the wet season across all sampling sites, with levels reaching up to 53,800 CFU/100ml for E. coli, 8,200-108,400 CFU/100ml for fecal coliforms, 650-45,000 CFU/100ml for fecal streptococcus, and 0-2.4 eggs/l for helminths. Through the waste stabilization ponds, significant microbial concentration drops of 82-100%, 78-98%, 60-100%, and 82-88% respectively were recorded between the anaerobic and maturation ponds. The results indicate that improving the refining performance of waste stabilization pond technology could help reduce the health risks associated with wastewater reuse in urban agriculture in developing countries.

박진욱, 안계복 · · South Korea

This study analyzes the current state of urban farming in South Korea through its legal system, the implementation status of the urban farming act, on-the-ground conditions, and comprehensive plans, in order to identify institutional improvements. It concludes that securing more space for urban farming and improving the support system for urban farmers are the two essential factors for improvement, and that—beyond these institutional and systematic reforms—enthusiastic engagement from local governments, secured budgets, and cooperation with citizens are necessary to expand sustainable urban farming.

QI Airon · · China

A study of Xi'an, China, built indicators for urbanization and urban agriculture development and applied principal component analysis and correlation analysis to examine their interaction mechanism and quantitative coupling relationship. Urbanization was found to promote urban agriculture's commercialization and scale through market effects and information diffusion, but rapid urbanization's rising population and industrial land use also strained land and water resources and degraded soil and the urban ecological environment, constraining urban agricultural development.

Malin Arvidson, Fergus Lyon, Stephen McKay, Domenico Moro · Voluntary Sector Review, Vol.4 No.1, pp.3-18 (Policy Press) · United Kingdom

A paper analysing how social return on investment (SROI) is used in the United Kingdom to conceptualise, measure and communicate the achievements of social enterprises and charities. It examines the quantification of benefits, the valuing of volunteering, and the ways judgement and discretion are exercised within an SROI exercise. It identifies a particular tension between the participatory element in designing each exercise and the use of its results for competitive funding, and proposes a research agenda on the contexts in which that discretion is applied. Abstract only was consulted.

Kathryn Colasanti, Michael W. Hamm, Charlotte M. Litjens · Urban Geography · United States (Detroit)

This research explores perceptions of expanding urban agriculture in Detroit, Michigan, through semi-structured interviews and focus groups. While revealing widespread support for urban agriculture as a strategy for food security and urban sustainability, the study highlights contested aspects regarding the extent to which it should occur, its purpose, and the people it would involve.

Nathan McClintock, Heather Wooten, Alethea Brown · Journal of Agriculture Food Systems and Community Development · United States (California)

This 2012 reflective case study documented the efforts of the Oakland Food Policy Council (OFPC) in Oakland, California, to develop recommendations for urban agriculture zoning. Despite popular interest in urban agriculture, zoning often acts as an obstacle to its expansion. The OFPC faced obstacles in gaining the attention of city officials and advancing its policy agenda for new zoning definitions and operating standards for urban agriculture.

Community Gardening Works! ACGA 2011 Conference, Carolin Mees, Edie Stone · Cities and the Environment · United States

This abstract discusses the rapid expansion of the community gardening movement in US urban areas. It highlights the potential for urban agriculture planning to turn against its original community-driven roots, as suggested by the title. The movement began over 30 years ago, with residents creating gardens on abandoned land, supported by programs like New York City's GreenThumb.

G. N. Egwu, John O. Agbenin · Archives of Agronomy and Soil Science · Nigeria

A study in northern Nigeria assessed cadmium, lead, and zinc contamination in soils and leaf vegetables (amaranthus, lettuce) irrigated with untreated wastewater. Total cadmium and zinc concentrations in soils exceeded safe limits, and lead and cadmium in edible portions of amaranthus and lettuce exceeded safe limits for human consumption by 7–17 times. The permissible limit for lead established for agricultural lands may not be suitable to ensure produce safety in urban and peri-urban agriculture in Kano.

Rowena Passy · Education 3-13 · Global

This article reports on two projects investigating school gardens, finding that while they can effectively engage primary children in learning, a divide exists among teachers regarding garden use. The article argues that mixed messages in policy concerning outdoor learning act as a barrier to teachers utilizing school gardens.

Ghulam Murtaza, Abdul Ghafoor, Muhammad Zia‐ur‐Rehman, Muḥammad Ṣābir, Asif Naeem · Communications in Soil Science and Plant Analysis · Global

This study investigated metal accumulation in plants grown in urban agricultural lands irrigated with untreated city effluent in developing countries. Sewage samples showed hazardous electrical conductivities, sodium adsorption ratios, and residual sodium carbonate for irrigation, although metal levels were near permissible limits. Critically, plants acquired metal contents that were greater than those found in the raw sewage or soils, indicating significant metal uptake.

David Tijero · Aldiri: arkitektura eta abar · Spain (Bilbao)

This article criticizes the municipal administration's attitude towards informal allotments on the outskirts of Bilbao. It analyzes the consequences of green space reclamation plans executed in recent years and advocates for policies promoting both formal and informal urban agriculture.

Nahed N. Mahrous · The Journal of Pediatrics · Canada (Hamilton)

This project investigated metal, bacteria, and corn root interactions in metal-contaminated soils from Blackfrairs Community Garden and a Hamilton home. It found that bacterial numbers were lower than in uncontaminated soils, and bioavailable metal concentrations increased over time. High concentrations of metals were detected in grains, with copper, iron, and manganese accumulating in rhizospheres, and zinc distributed throughout root tissue in Blackfrairs plants.

Sylvestre Dasylva · Journal of environmental science & engineering · Senegal (Dakar)

This paper discusses rainwater management in the "niayes" zone of Dakar, Senegal. This area is characterized by agricultural depressions with typically high groundwater levels, but a recent drop has turned some into runoff-gathering sites, used for urban agriculture among other services. However, two acute problems are observed: hydrological drying due to insufficient rainwater refill and urbanization of these bottom-lands. Furthermore, decreasing pluviometry exacerbates nuisances like floods and malaria.

I. Karabozhilova, Barbara Wieland, Silvia Alonso, Laura Salonen, Barbara Häsler · British Poultry Science · United Kingdom (London)

A 2010 questionnaire survey of 30 backyard chicken flock-keepers in the Greater London Urban Area found that while chickens generally had conditions for natural behaviors, most owners did not comply with regulations on catering waste feeding. Disease prevention measures were rare, and a lack of avian and zoonotic disease knowledge among owners was observed, indicating implications for disease control.

Chiara Tornaghi · · United Kingdom

This academic-activist research on grassroots urban agriculture initiatives, focusing on four projects in Leeds, UK, found that local and regional institutions have limited ability to respond to these new demands. Planning traditions constrain institutions, failing to create flexible public spaces. Consequently, short-term solutions are found in "loose spaces" or ad-hoc negotiations, but these remain emergency or residual practices, highlighting challenges for urban public space management.

Shengzhong Chen · Guangdong nongye kexue · China (Guangzhou)

This study analyzed the development conditions, process, characteristics, and barriers of urban agriculture in Guangzhou City. It showed that while urban agriculture in Guangzhou has formed functions such as production, technology demonstration, ecological barriers, and leisure services, it faces internal and external development barriers including a decline in agriculture's status, expansion of urban land, labor shortages, and environmental pollution. These barriers hinder the healthy and sustainable development of urban agriculture.

윤희정, 조미경 · · Korea

This study aimed to critically consider and classify new paradigms for urban parks in the 21st century. While urban parks exhibit progressive aspects such as process, openness, productivity, and community space, they face significant criticism regarding the long development period for tree growth, covering open spaces, ecological limitations, economic validity, urban sprawl, underutilization as a low-carbon strategy, and negative consilience with contiguous fields. Based on these critical considerations, the study proposed urban agricultural parks as an alternative.

Coline Perrin · International Planning Studies · France, Italy

Case studies in Provence and Tuscany indicate that planning prescriptions and land-market control are insufficient for protecting farmland on the urban fringe. Farmland is not effectively protected if regulatory approaches are not integrated into a global strategy for agriculture and food based on community involvement. Farmland protection policies are more effective when combining top-down policies with bottom-up initiatives and recognizing the multifunctional character of urban agriculture.

Julie L. Self, Amanda Wyatt, Aimee Webb Girard · The FASEB Journal · United States (Atlanta)

This research characterized community gardens (CGs) in two urban counties in Atlanta, Georgia, through semi-structured interviews with diverse garden leaders. The study identified primary barriers to creating and sustaining CGs as leadership constraints, reliable access to natural resources, and unclear regulations. It also found that CGs foster access to fresh food, knowledge, and community connections, with benefits varying by community.

강현정, 김세용 · 한국주거학회 학술발표대회 논문집 · South Korea

Modern cities prioritize development, leading to environmental deterioration. The biotope area ratio may not adequately reflect spatial utilization and plant growth conditions in multi-unit dwellings. While urban agriculture holds potential for environmental reform, a systematic framework and clear guidelines for its practical application are currently lacking. This study aims to derive crop indices for revitalizing urban agriculture and propose development directions for the biotope area ratio.

Lori Leonard, W. J. S. Mwegoha, Charles Kihampa · International Journal of Plant Animal and Environmental Sciences · Tanzania (Dar es Salaam)

This study investigated public awareness and health risks from heavy metal pollution in vegetables irrigated with Msimbazi River water in Dar es Salaam, Tanzania. Over 71% of 35 respondents used the river for irrigation, and high levels of chromium, lead, and copper were detected in popular vegetables. 69% of respondents were unaware of industrial pollution, and 63% were unaware of potential health effects. The study found that 95.6% of adults, 30.7% of children aged 6-12, and 12.5% of children aged 2-6 were at risk of lead carcinogenic effects, while 5% of children aged 2-6, 2.8% of children aged 6-12, and 1.2% of adults were at risk from carcinogenic cadmium effects.

Jenny Calabio, Ma. Luisa Albacete · WVSU Research Journal · Philippines (Iloilo City)

This study, conducted from July 2007 to July 2008 at the Urban Agriculture Demonstration Site in La Paz, Iloilo City, evaluated soil media and ameliorants for container-grown green onion, pechay, and tomato. Pure compost was found to be the best medium for increasing yields. However, the use of IMO and rice hull as soil ameliorants did not increase yields for the three tested vegetables, and rice hull generally reduced pechay yields.