Research & reports

Anne‐Marie Hamelin, Céline Mercier, Annie Bédard · Public Health Nutrition · Canada (Quebec City)

A study in Quebec City, Canada, interviewed 55 food-insecure households and 59 stakeholders to compare perceptions of food security needs and community programs. While both groups agreed on the need for better financial resources, households reported that food quality and access were neglected, and that existing programs, even combined, were insufficient to meet their needs. Stakeholders, however, largely perceived households as satisfied with programs and believed their primary need was a basic amount of food. The study concluded that community programs alone cannot bring about the social change needed to prevent food insecurity.

Dorothy Blair · The Journal of Environmental Education · United States

An evaluative review of U.S. literature on children's gardening found that quantitative studies showed positive outcomes in science achievement and food behavior. However, these studies did not consistently demonstrate improvements in children's environmental attitude or social behavior, and validity and reliability issues reduced general confidence in the results. Qualitative studies documented a wider range of desirable outcomes, but teacher enthusiasm varied based on support and horticultural confidence.

Evan Green · · United States (California)

A literature meta-analysis on lead contamination in urban farms was applied to Alemany Farm in San Francisco, California, where soil lead concentrations range from 60 to 720 ppm. It found that every food crop except tree fruits may pose a health risk if grown in Alemany Farm's soil. A phytoremediation plan using Indian mustard (Brassica juncea) to remove lead was found to exceed the farm's available budget, and its timescale made it impractical. The study concludes that phytoremediation is generally not feasible for small-scale urban farms and that other measures are needed to reduce lead exposure for urban farmers.

Lynn A. Staeheli, Donald W. Mitchell · · United States (New York City)

This book explores the complex relationship between power, politics, and public space across various US cities, including Washington, D.C., Santa Fe, San Diego, Syracuse, and New York City. Chapter 5 specifically addresses the struggle for public access and control in New York's community gardens. The work reveals challenges in governance and public access within these urban spaces.

Juliana Arruda, Nilson Antonio Modesto Arraes, Arruda, Juliana, Arraes, Nilson Antonio Modesto · LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) · Brazil

Since 1997, the Municipal Chamber and the executive branch in Campinas, São Paulo state, Brazil, have signaled an intention to place urban agriculture on the political agenda through legislation and regulations governing the Campinas Community Vegetable-Garden Program (CVP). Based on exploratory analysis and interviews conducted in 2005 with program managers, together with documentary sources, this study examined the management of the CVP to inform possible reformulation of the municipality's urban and peri-urban agriculture policy. The analysis found an almost total disconnection between the CVP and the municipality's education, health, and social-action policies.

Shane R. de Solla, Pamela A. Martin · Environmental Toxicology and Chemistry · United States

Because many reptiles oviposit in soil within agricultural landscapes, this study evaluated the toxicity of two commonly used nitrogenous fertilizers — urea and ammonium nitrate — to snapping turtle (Chelydra serpentina) egg survivorship. Eggs were incubated, unmanipulated and under ambient conditions, in a community garden plot treated with urea at realistic rates up to 200 kg/ha in 2004 and ammonium nitrate up to 2,000 kg/ha in 2005, and separately in covered laboratory bins designed to minimize nitrogen loss through volatilization or leaching. In the field, neither urea nor ammonium nitrate affected hatching success or development, despite ammonium nitrate showing overt toxicity to native plants. In the laboratory, however, both fertilizer exposures reduced hatching success, lowered body mass at hatching, and reduced post-hatching survival compared with controls. The authors attribute the field's lack of toxicity to leaching and atmospheric loss of nitrogen in soil, and conclude that nitrogenous fertilizers likely have little direct impact on turtle eggs deposited in agricultural landscapes.

Randall Walsh · Journal of Urban Economics 61(2): 319-344 · United States

Uses a locational-equilibrium model that treats both privately held open space and land-conversion decisions as endogenous to evaluate the metropolitan-wide impact of open-space policy. Shows that once endogenous adjustment of private open space is allowed for, expanding public preserves can actually reduce the total quantity of open space across a metropolitan area. Also finds that different strategies for spending the same open-space budget have markedly different land-use and welfare consequences.

Juliana Arruda, Nilson Antonio Modesto Arraes · LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) · Brazil (Campinas)

A 2005 study in Campinas, Brazil, analyzed the city's Community Garden Program (PHC) to support the formulation of new urban and peri-urban agriculture policies. Analysis of PHC management revealed an almost total disengagement between the program and sectoral policies such as education, health, and social action. However, individual actions were found to be important for project implementation and success, and the projects were significant in the lives of beneficiaries.

Fabrício de Araújo Pedron, Ricardo Simão Diniz Dalmolin, Antônio Carlos de Azevedo, Márcio Ramos Botelho, Alessandro Samuel‐Rosa · Ciência Rural · Brazil (Santa Maria)

This study analyzed the spatial and temporal dynamics of land occupation in urban areas of Santa Maria, RS, Brazil, and determined land use conflicts using data from 1975 to 2002. Urban land use increased from 9% in 1975 to 33% in 2002. Land use conflicts increased from 19% in 1975 to 37% in 1995, then decreased to 33% in 2002. The main problems of improper land use are related to the fragility of geological material and soil resources for use in construction and urban agriculture.

Edilene Lagedo Teixeira, Janailton Coutinho, Adriano Costa da Silva, Andréa Soares, Camila Silva de Oliveira, Carla Gomes dos Santos, Beatriz Ribeiro Guimarães · REVISTA BRASILEIRA DE AGROECOLOGIA · Brazil

This study, conducted in 2003 by UNISOL REGIONAL and UFRRJ, aimed to develop an organic, condiment, and medicinal garden through social education activities. A socioeconomic survey of the community revealed urgent problems with water scarcity, mosquitoes, and rodents. While two garden beds and 12 planters were built to encourage self-sustaining urban agriculture, the abstract does not explicitly state the success or failure of achieving self-sustainability or addressing the identified community problems beyond the construction itself.

Fabrício de Araújo Pedron, Ricardo Simão Diniz Dalmolin, Antônio Carlos de Azevedo, Everton Luís Poelking, Pablo Miguel · Ciência Rural · Brazil (Santa Maria)

This study conducted an environmental diagnosis in urban areas of Santa Maria, Brazil, using the Urban Land Use Potential Assessment System (SAPUT) to identify land use conflicts. Remote sensing and geoprocessing techniques were employed. The identified problems of improper land use are related to the fragility of geological material and soil resources, with up to 33% of the area being used beyond its potential due to inadequate use for construction and urban agriculture.

Adelaide Ellen Pigg, Tina M. Waliczek, Jayne M. Zajicek · HortTechnology · United States (McAllen, Texas)

A study of 196 elementary students in McAllen, Texas, compared the academic progress of students participating in a school garden program with those receiving traditional classroom instruction. No statistically significant differences were found in science achievement scores, indicating similar benefits for both groups. However, students receiving traditional math instruction showed more improved math achievement scores compared to those in the garden program.

Patricia Allen, Julie Guthman, Amy Wilson Morris · eScholarship (California Digital Library) · United States (California)

A research brief examining whether alternative food initiatives (AFIs) such as community supported agriculture (CSA) and farmers' markets can meet the food security needs of low-income consumers, based on interviews and surveys of farmers' market and CSA managers throughout California. The authors conclude that AFIs are not, and cannot be, substitutes for state entitlements in meeting the food security needs of low-income people.

Juliana Portela do Rego Monteiro, Maria do Socorro Lira Monteiro · RePEc: Research Papers in Economics · Brazil

A study of 43 urban gardens in Teresina, Piauí state, Brazil, analyzed via primary data collection and field research whether the gardens function as a means of generating work and income and improving socioeconomic conditions without degrading the environment. Most gardeners were women over 45 with incomplete elementary education, earning up to one minimum wage, originally from the state's interior, who had worked in agriculture before joining the gardens and worked them as a family. Most had not participated in training since entering the program, used their own resources for production, concentrated 70.08% of output on cilantro, chives and lettuce, and sold produce mainly on-site; soil amendment relied mostly on manure with limited chemical fertilizer, and only 36.81% of gardeners used pesticides. The study concludes that low remuneration, stemming from limited crop diversity, poor organization and lack of financing, led some family members to seek alternative income.

Soren T. Anderson, Sarah E. West · Regional Science and Urban Economics 36(6): 773-789 · United States (Minneapolis-St. Paul)

A hedonic analysis of home transactions in the Minneapolis-St. Paul metro area finds that the value of proximity to open space is higher in dense neighborhoods, those near the central business district, high-income, high-crime, or with many children. Warns that applying the metro-wide average value to a specific neighborhood can substantially overestimate or underestimate what open space is worth there.

R. Robles · Revista Agraria · Mexico (Mexico City)

This paper provides an overview of urban agriculture in Mexico City and its conurban area, contrasting production models in developing and developed countries. It reviews the main urban, suburban, and peri-urban production systems and discusses public policies for promoting urban agriculture. The study concludes that no specific policy has been designed to promote urban agriculture in Mexico.

Samantha Langley-Turnbaugh, David E. Wilkinson, D. Rocque · Soil Survey Horizons · United States

This study characterized urban soils in a low-income neighborhood of Portland, Maine, that was heavily industrialized in the late 1800s, examining seven pedons for particle size, cation exchange capacity (CEC), base saturation, exchangeable bases, pH, and trace elements (Pb, Cr, Cu, Co, Cd, Ni, Zn, Hg, Ti, Zr). The soils contained numerous artifacts and showed a high degree of horizontal and vertical spatial variability; several trace elements were present at elevated levels, with lead (Pb) the dominant metal in surface horizons (600 mg/kg), and many metals correlated with each other and with iron and aluminum, and some with clay content and pH, though the study concludes that mapping soil units by specific trace element ranges would be difficult given the extreme variability observed.

Laura Lawson · Journal of Planning History · United States

This historical review of US community garden programs since the 1890s reveals an ambivalent relationship between community gardens and the planning profession. While praised for serving environmental, social, and individual objectives, community gardens are largely ignored in long-range planning due to being perceived as opportunistic and temporary. This highlights unresolved tensions between professional planning and civic concerns, and between comprehensive planning and local interventions.

Kenny Lynch · · United States

A 1992 survey by Bryant and Johnston in the US examined farming in the 'city's countryside'. The survey found that key concerns among farmers included changes in the local community, excessive traffic, issues of trespassing and vandalism, and complaints from non-farm neighbors. These findings indicate challenges in governance and community relations for peri-urban farmers.

Prebus, Olivia · Occidental College Scholar (Occidental College) · United States (Los Angeles)

This work addresses the gross inequity of food access in low-income neighborhoods of Los Angeles, such as MacArthur Park, where grocery stores are scarce. The author's internship at the Center for Food and Justice involved projects like a Community Food Assessment and organizing a community garden, all focused on empowering communities to tackle complex food access issues. The abstract highlights the severe problem of limited healthy food options leading to simultaneous obesity and malnutrition.

Christopher M. Smith, Hilda E. Kurtz · Geographical Review · United States (New York City)

New York City community gardens have faced political contestation for thirty years, notably in 1999 when 114 gardens were slated for public auction and redevelopment. This article examines the controversy as a politics of scale, where garden advocates expanded the dispute beyond individual gardens and the city. The analysis highlights the significance of scale politics for grassroots organizations within a market-centric, neoliberal economic framework.

Jan Perez · eScholarship (California Digital Library) · United States (California)

This 2003 research brief investigated the experiences of Community Supported Agriculture (CSA) growers on the central coast of California. The study examined their motivations, economic viability, challenges, and issues related to equal access to their products. The research brief indicates that challenges and issues of equal access are present in CSA projects.

Charles Rowley · eScholarship (California Digital Library) · United States (California)

This paper compared the successes and failures of two urban creek restoration programs in California: Temescal Creek (initiated nearly 30 years ago) and White Oak Creek (completed about four years ago). Based on the author's success criteria, the more recent White Oak Creek program achieved significant success, while the earlier Temescal Creek restoration did not reach generally acceptable success levels. This difference is attributed to changes in management and scientific practice over 30 years, including substantial changes in the legal basis for restoration, improved monitoring requirements, and the critical role of properly engineered low flow distribution structures.

Karen Schmelzkopf · Urban Geography · United States (New York City)

This study examined the conflict over community gardens in New York City, arguing that it was a struggle concerning the right to space. The city, operating from an entrepreneurial governance perspective, claimed that the gardens represented a loss of exchange value and potential housing. The city used market economy rhetoric to dismiss incommensurable use values, thereby restricting rights to the city within a demonstration of power and "reason."

Sigrid Stagl, Sabine O’Hara · International Journal of Agricultural Resources Governance and Ecology · United States (New York City)

This study examined whether Community Supported Agriculture (CSA) groups are a broadly accepted or limited alternative food system, based on a household survey in two distinct socio-economic neighborhoods in upstate New York. The survey found that approximately 25% of respondents expressed interest in becoming CSA members, with similar interest levels in both wealthier and low-income areas. However, several factors preventing food demand through CSAs were identified, indicating that these barriers would need to be addressed for expansion.