Research & reports

Rebecca T. Barnes, Peter A. Raymond · Ecological Applications · United States

This study examined nitrate export from small, closely spaced headwater watersheds in the United States representing urban, agricultural, and forested land uses, using the dual isotopic composition of stream nitrate (δ15N-NO3− and δ18O-NO3−) together with a numerical model to control for variation in geology, surficial materials, and climate. The isotopic values varied significantly among the three land-use types, with δ15N-NO3− reflecting nitrogen source and δ18O-NO3− reflecting biogeochemical processing; the highest nitrate concentrations coincided with the highest stream δ15N-NO3− values because of enriched anthropogenic sources — septic systems in urban watersheds and manure in agricultural watersheds — and average net removal of the available nitrate pool across urban and agricultural catchments was estimated at 45%, with the degree of removal varying by drainage area and organic carbon availability.

Danielle Nipper · D-Scholarship@Pitt (University of Pittsburgh) · United States

A methods paper (D-Scholarship@Pitt, University of Pittsburgh, 2010) proposes applying the Sustainability Assessment Modeling (SAM) framework—which quantifies stakeholder values, perceptions, and economic and environmental costs—to develop an assessment tool for community garden longevity and sustainability, motivated by evidence that community gardens often struggle with discontinuation. The paper reviews SAM-related literature and its methods, strengths and limitations, and proposes a participatory assessment process using indicators of organizational strengths, weaknesses, and success such as longevity, without presenting empirical test results of the tool itself.

U.S. Environmental Protection Agency · U.S. EPA Local Climate and Energy Program Webcast · United States

In a June 8, 2010 EPA Local Climate and Energy Program webcast, Michael Berkshire of the City of Chicago's planning department described the city's green roof policy. He stated that on a 90°F day, the green-roofed side of City Hall stayed around 90°F while the non-vegetated County Building side reached about 170°F, and credited a sustainable development policy (started 2004, expanded 2008) and a 2008 stormwater ordinance requiring sites to retain 0.5 inch of rain or increase perviousness by 15% as key drivers of green roof adoption.

Larsen K., Gilliland J. · Health & Place 15(4):1158-1162 · Canada

Evaluates a farmers' market established in a London, Ontario food desert, analyzing its effect on the price and availability of fresh, healthy food and its potential to improve local food access.

Rocha C., Lessa I. · International Planning Studies 14(4):389-400 · Brazil

Describes the distinct food security governance developed by Belo Horizonte (2.5 million people), marked by comprehensive programs, urban/rural focus, flexibility, and commitment to social justice and equitable food access.

Colla S.R., Willis E., Packer L. · Cities and the Environment (CATE), 2(1):4 · Canada (Toronto area)

A foundational study comparing bee diversity and abundance on green roofs and ground-level sites near Toronto. With suitable plants and management, green roofs can host bee communities comparable to ground habitats, discussing implications for urban pollinator conservation and rooftop agriculture.

Arce B., Prain G., Maldonado L. · Women Feeding Cities: Mainstreaming Gender in Urban Agriculture and Food Security (Practical Action Publishing), Chapter 13 · Peru (Lima)

Examines land tenure insecurity and gender constraints among periurban farmers in Carapongo, Lima, showing that women's time burdens limit participation in horticulture field schools. Based on a baseline survey of 125 producers conducted through the CGIAR Urban Harvest initiative.

Kratky B. A. · Acta Horticulturae · United States

Presents three non-circulating, low-cost hydroponic methods for growing lettuce in which roots grow into a static nutrient solution with no pump, air stone, timer, or electricity required. The passive approach can be built with simple containers/tanks and reduces additional labour.

· Journal of Community Practice · USA

A case study of a community gardening/conservation program analyzing the individual, social, and community-level benefits generated through participation in the program's activities.

Sarah Dooling · International Journal of Urban and Regional Research · USA (Seattle)

Defines 'ecological gentrification' as the implementation of a public green-space planning agenda that displaces the most vulnerable (homeless people) while espousing an environmental ethic—framing green public policy itself as a driver of exclusion.

Kevin C. Matteson, Gail Langellotto · Cities and the Environment · United States (New York City)

In 2005, a study compiled a list of crop plants in 19 New York City community gardens, classifying them by bee pollination dependence. Using mark-recapture methods, the abundance of the common eastern bumble bee (Bombus impatiens) was estimated. Wild populations of B. impatiens were found to be abundant in New York City community gardens, where it is the most prevalent native bee species and visits various crop flowers.

M.R. Gorham, Tina M. Waliczek, Amy Snelgrove, Jayne M. Zajicek · HortTechnology · United States (Houston)

A pilot study in Houston, Texas, investigated the impact of 11 established community gardens on property crime numbers using 2005 crime data. Statistical comparisons between community garden areas and randomly selected city areas showed no statistically significant differences in the mean number of crime occurrences. The presence of a community garden was not found to be a predictor of a lower crime rate for a neighborhood.

Bruno Martins Dala Paula, Ivana Cristina Lovo, José Delázaro Filho · Urban Agriculture Magazine · Brazil (Belo Horizonte)

This project in Belo Horizonte, Brazil, involved seven households sharing a community garden. Participating families collected household organic waste, with five families collecting 5 kg every 8-10 days. From March 25 to September 25, a total of 420 kg of organic waste was collected and used for collective compost production, which was then distributed to all garden members.

Emma Schroeder, Julie Schneider · · United States (Eagle Heights)

Julie Schneider's 2009 interview discusses her five years at the Eagle Heights Community Garden. She described vegetables grown, organic gardening, rules and restrictions, and tensions with the university, as well as changes in the community gardens since the early 1990s. This interview was conducted for a Master's thesis on the Eagle Heights Community Gardens.

Mirane dos Santos Costa, Marivaine da Silva Brasil, Alberto Feiden, Adalgiza Inês Campolim · · Brazil/Bolivia

An exploratory study was conducted in the border cities of Corumbá, Brazil, and Puerto Quijarro/Puerto Suarez, Bolivia, to investigate the socioeconomic profile of Brazilian and Bolivian sellers of leafy vegetables at street fairs and their relations with urban farmers. The study aimed to identify the origin, production system of leafy vegetables, and the socioeconomic characteristics of these fair sellers and farmers, with preliminary results presented.

Wendy Heiger‐Bernays, Alexa Fraser, Vaughn R. Burns, Kerry Diskin, David Pierotti, K Merchant-Borna, Michael D. McClean, Daniel J. Brabander, H. Patricia Hynes · PubMed · United States

A study characterized urban community garden soils contaminated by timbers, specifically finding elevated levels of polycyclic aromatic hydrocarbons (PAHs) from railroad ties and arsenic from chromated copper arsenate (CCA) treated lumber. Researchers determined the extent of contamination, designed a remediation plan, and assessed the safety of adding city compost as a soil amendment in Boston community gardens. Recommendations for healthful gardening practices were also provided.

Vikram Bhatt, Leila Marie Farah, Nik Luka, Jeanne M. Wolfe · Open House International · Canada (Montréal)

The "Edible Campus" project, launched in Montréal in spring 2007, was an action-research initiative aimed at transforming underutilized urban spaces into productive areas. It involved citizens in creating green community spaces by incorporating productive container growing on a concrete-covered part of McGill University's downtown campus. This project investigated how to enhance urban food security through increased urban food production and demonstrated how "edible landscapes" can be integrated into urban spaces.

Samireille Silvano Messias, Ednaldo Michellon, Marcos Rogério da Silva Alves dos Santos, Camila Pereira Croge, Juliano Tait Vareschini, Fernande Antunes Fernandes · REVISTA BRASILEIRA DE AGROECOLOGIA · Brazil (Maringá)

In Maringá, Paraná, the growing need for urban and peri-urban agriculture led to the establishment of the Urban and Peri-urban Agriculture Reference Center (CERAUP) by Maringá State University, in partnership with municipal governments and funded by the Ministry of Social Development and Fight Against Hunger. This project aims to enable the region's most vulnerable families to produce healthy food without pesticides and earn extra income by selling surplus produce. This initiative facilitates food re-education and capacity building for direct beneficiaries and the entire population around these urban agriculture spaces.

James C. Anderson, Eun‐Young Kim · Journal of Agricultural Education · United States (Chicago)

This descriptive study investigated leadership development perceptions and preferences among 284 students in a comprehensive urban agriculture program at Chicago High School for Agricultural Sciences. Students reported limited involvement in school or community organizations, learning leadership primarily through sports, work, and FFA. They preferred leadership activities to be organized, fun, interactive, and provide real-world application, with training occurring in school, national workshops, or international experiences.

Éric Duchemin, Fabien Wegmuller, Anne-Marie Legault · Field Actions Science Reports · Canada (Montreal)

This article discusses urban agriculture (UA) initiatives undertaken in Montreal, Canada, for over 30 years, specifically the City-managed Community Gardening Program and six collective gardens managed by community organizations. These UA initiatives have fostered vegetable production and a socialization and education environment, contributing to individual and collective social development in economically disadvantaged districts. The various approaches achieve their established objectives and serve as multi-dimensional tools for the social development of disadvantaged populations.

Erica Rose Menkel Mintzer · · United States

This study evaluated a garden-based curriculum and school lunch program at Common Ground High School in the United States using mixed quantitative and qualitative methods. It found that Common Ground students had more food system knowledge but not more basic nutrition knowledge than comparison schools. While Common Ground students increased fruit and vegetable intake at school over the year, comparison school students ate more familiar vegetables, and Common Ground students ate more unfamiliar vegetables. BMI data showed varied averages between schools and grades, with no statistically significant difference (p = 0.0622).

Clara Irazábal, Anita Punja · Journal of Urban Affairs · United States (Los Angeles)

This qualitative case study analyzes the destruction of the 14-acre South Central Farm in Los Angeles in July 2006, arguing it was a landscape of resistance against discriminatory legal and planning practices. The study contends that environmental justice and planning ethics provided a substantive rationale for the city to prevent its dismantling. This case highlights a failure in governance to protect community gardens threatened by dismantlement in capitalist societies.

Colleen O’Holleran · School for International Training Digital Collections (School for International Training) · United States (Boulder, Colorado)

A study in Boulder, Colorado, interviewed thirteen community gardeners to understand their motivations for participation. Gardeners were found to come from diverse backgrounds and participate for various reasons, including the desire to be outdoors, curiosity, resource sharing, a closer connection with food, self-reliance, health commitment, and pride. Despite challenges, gardeners overcome them due to their commitment to cultivating their plots.

Rachel Chadderdon, Laura Colangelo, Joel Heeres, Brian Lipinski, Rachel Steel · · United States

This project assessed how the Ypsilanti-based nonprofit Growing Hope could best utilize its recently acquired Growing Hope Center to promote garden-related social enterprise activities. Through literature review, surveys of urban agriculture nonprofits and Ypsilanti residents, and a survey of Washtenaw County food businesses, sufficient community demand for a market gardener training program and willingness of local businesses to purchase produce were identified. The research led to the formulation of two models, the Food Security Model and the High Production Model, and a recommendation for Growing Hope to form an Ypsilanti Food Policy Council.

Luciana Morais de Freitas · REVISTA BRASILEIRA DE AGROECOLOGIA · Brazil

This project in the Federal District and surrounding areas of Brazil aimed to improve and expand food production and promote agroecological practices in settlements and pre-settlements. Implemented in partnership with MDS and Via Campesina, the urban and peri-urban agriculture initiative has enhanced production conditions in these settlements. It also strengthens the productive chain by training producers in agroecological practices.