Research & reports

John Taylor, Mamatha Hanumappa, Lara Miller, Brendan Shane, Matthew L. Richardson · Sustainability · United States (Washington, DC)

A public-access geographic information system (GIS) and Tableau dashboards were developed for comprehensive multifunctional urban green infrastructure (UGI) planning in Washington, DC. The dashboards enable stakeholders to identify existing UGI (150 ha) and potential areas for new UGI, including urban agriculture (UA). A total of 2734 ha is potentially suitable for UGI development, with 2575 ha potentially suitable for UA. Of this UA potential, 56% is located in Wards 5, 7, and 8, which are largely food deserts with primarily Black residents experiencing the greatest inequities. The tool allows users to prioritize equitable UGI development using population vulnerability indices.

Sarah E. Coffey, John F. Munsell, Rico Hübner, Curtis R. Friedel · Urban Agriculture & Regional Food Systems · United States (Virginia)

A survey of 68 mayors (39% response rate) in Virginia, US, from communities under 25,000 population, investigated public food forest initiatives. Mayors identified long-term maintenance as the greatest barrier and noted that 78% of municipalities lack land use codes for food-producing trees and shrubs. While nearly 70% reported some public land food production, only one-fifth included food-producing trees. Mayors emphasized sociocultural programs and education over food access as the most compelling aspect.

Vidya Anderson, William A. Gough · International Journal of Biometeorology · Canada (Toronto)

A controlled field study in Toronto, Ontario, Canada, evaluated the impact of multiple types of green infrastructure on near-surface air temperature regulation. Over two summers, a field campaign measured the impact of green roofs, green walls, urban vegetation and forestry systems, and urban agriculture systems on near-surface air temperature. This study demonstrated that multiple types of green infrastructure applications are beneficial in regulating near-surface air temperature and are not limited to specific treatments.

Cari Borja · Gastronomica The Journal of Food and Culture · United States (California)

To commemorate 50 years since the founding of Chez Panisse restaurant in Berkeley, California, in 1971, Alice Waters and University of California President Michael V. Drake planned an event for August 28, 2021, to gather educators, farmers, and others to address climate change. The event was postponed due to a surge in COVID-19 Delta variant cases, but a message was sent supporting the values of public education through the economic stimulus of local organic food procurement. Waters' vision explored possibilities in our relationship to food and community, connection to land, and the broader cultural picture.

Kyla D. Scherr, Mary A. Jamieson · Basic and Applied Ecology · United States (Michigan)

This three-year study investigated environmental factors influencing strawberry productivity for two cultivars at ten farms across a rural-urban gradient in Michigan, USA. It found no direct effect of urbanization on strawberry production or fruit pathogen and pest damage, but temperature significantly influenced crop productivity, with cooler rural and warmer urban temperatures limiting fruit number. While no relationship was found between urbanization and overall arthropod pest, predator, or pollinator abundances, Vespidae abundance was positively associated with urbanization, and Araneae abundance was negatively associated.

Christina Ergas · · United States

This chapter explores urban ecovillages in the United States, highlighting challenges faced by ecovillagers in a neoliberal context. It examines cultural conflicts between sustainability and consumer culture, and points out the exclusive, upper-class, white nature of the local food movement in the US. Monetary and time constraints have made local organic food an elite phenomenon, often cited as a first step to gentrification in urban communities.

Matthew L. Richardson, Caitlin G. Arlotta · Scientia Horticulturae · United States (Washington, DC)

This study grew seven genotypes of Hibiscus sabdariffa L. in green roof, field row, and high tunnel systems in and near Washington, DC, to compare leaf and flower yield, nutritional differences, and insect pest susceptibility. Genotype PI 286316 produced abundant flowers, particularly in high tunnels, while leaf production was highest in field rows despite frequent Popillia japonica attacks. PI 273388, PI 275414, and green hibiscus yielded the most leaves, and genotypes showed nutrient differences regardless of the production system. The locally adapted green hibiscus performed well across systems, was least attacked by pests, and had higher nutrient levels, demonstrating H. sabdariffa's suitability for temperate urban systems.

Stephanie Buechler, Karina Guadalupe Martínez-Molina · Energy and Climate Change · United States

This study compared rural and urban populations living near or receiving energy from a large-scale solar-wind energy park in Arizona, Southwest U.S., using an energy justice framework. Small-scale renewable energy projects better served low-income groups, with more governmental and non-profit organization support for these projects in urban areas. Adverse effects of large-scale projects on communities and wildlife were not being addressed via benefits or profit sharing.

Tyler Pratt · Digital Commons - USU (Utah State University) · United States (Utah)

Irrigation evaluations were performed for 24 urban and small farms in Cache Valley, Utah, during the 2015 growing season, providing a clearer picture of urban and small farm agricultural irrigation. Irrigation efficiencies ranged from 6% to 100%, showing high heterogeneity, with small fields generally having greater irrigation depths and surface irrigated fields applying higher depths than sprinkle and drip irrigated fields. Management significantly influenced efficiency, and water conservation programs may not result in true water savings if management effects are ignored.

Mariana Castañeda Díez, Rita de Cássia Martins Montezuma · Sociedade & natureza · Brazil (Rio de Janeiro)

This paper addresses two problems in Rio de Janeiro: environmental issues from native restinga fragmentation due to urban development, and food shortages in low-income communities. It proposes edible landscaping for public spaces on Rio's west side to tackle these issues. The research involved theoretical framework analyses, geo-technological tools, and local visits for biophysical, urban, and architectural analyses to select suitable public spaces for the edible landscape proposal.

Ana Júlia Maia Mairink, Alice Menezes Monteiro, Rejane Magiag Loura, Tiago Almeida Nogueira · · Brazil (Belo Horizonte)

This study provided academic and technical support for designing low-environmental-impact solutions to infrastructure deficiencies at the "Coqueiro Verde" Collective/Community Urban Agriculture Production Unit in Belo Horizonte, Brazil, to develop urban resilience strategies. A participatory diagnosis identified problems such as water scarcity and mismanagement, lack of sanitation, and the need for easy implementation and low cost. Primary solutions selected were the dimensioning of an Evapotranspiration Tank and the modular design of a support point based on soil-cement blocks.

Isaac Kwadwo Mpanga, Ursula K. Schuch, Jeff Schalau · Current Research in Environmental Sustainability · United States

A study in north-central Arizona, United States, investigated land use and farm practices among small-scale growers and their role in resilient, sustainable local food production. Amid rising pressure from population growth and extreme climate on agricultural land, Arizona's average farm size fell 57% while the number of farms rose 127% between 1997 and 2017, and family farms under 10 acres now make up 50% of the state's farmer population. The study found that 52% of the surveyed small farms were family operations, with regenerative and sustainable practices predominating — cover cropping (27%), compost use (26%), crop rotation (23%), animal or green manure (22%), no-till (21%), and reduced tillage (18%) — while conventional practices such as intensive tillage (5%) and synthetic fertilizers (13%) were less common. For pest, weed, and disease control, 95% of growers used biological, cultural, or mechanical methods versus 5% using conventional synthetic chemicals, and for irrigation, 78% used water-saving methods (drip, subsurface, sprinkler) while 11% used open flood irrigation.

Beatriz Salazar · CEPES (Centro Peruano de Estudios Sociales) · Peru

A CEPES article describing biohuertos run by communal kitchens (ollas comunes) in metropolitan Lima, a practice underway for roughly a decade under the legal framework of Ordinance 1629 (enacted 2012). It cites implementation across 12 districts without giving specific garden or participant counts, and concludes that such urban agriculture initiatives should be incorporated into Local Climate Change Plans and funded under regulations for the country's food emergency law.

Hélder Ribeiro Freitas, Maximiliano Pérez, Carolina Baldini, Cristiane Moraes Marinho, Pablo Arístide, Denes Dantas Vieira, Lucas Ricardo Souza Almeida, Elson de Oliveira · LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) · Brazil; Argentina

This study analyzes urban and peri-urban agriculture (UPA) experiences in the Sertão de São Francisco Pernambucano/Bahiano (Brazil) and the southern Buenos Aires Metropolitan Area (AMBA, Argentina). Using an action-research methodology from 2017 to December 2019, it aimed to understand UPA dynamics and improve sustainable agri-food systems. The analysis shows various contributions to territorial processes in promoting agroecology and UPA security among diverse stakeholders.

Neil Cox, Zoe Beynon-MacKinnon · Journal of Agriculture Food Systems and Community Development · Canada

This article presents observations and suggestions from the operations of Lettuce Harvest Foundation (LHF), a grassroots urban agriculture nonprofit in Vancouver, Canada, founded in 2019. LHF's programming was designed to address challenges posed by the COVID-19 pandemic. The findings suggest that short-term emergency food relief is insufficient, and propose harnessing pre-existing industry elements as a method for grassroots organizations to mitigate food system strains during crises.

Otávio Augusto Queiroz dos Santos, Eduardo Carvalho da Silva Neto, Andrés Calderín García, Hugo de Souza Fagundes, Yan Vidal de Figueiredo Gomes Diniz, Robert Ferreira, Marcos Gervásio Pereira · Revista Brasileira de Ciência do Solo · Brazil (Rio de Janeiro)

This study investigated the effect of tillage with plowing and drainage on Histosol properties in three land use systems in Rio de Janeiro, Brazil. The research focused on areas subjected to different land use systems over the last twenty years, aiming to understand how management practices impact these carbon and nitrogen-rich soils.

John Taylor · Frontiers in Sustainable Food Systems · United States (Rhode Island)

This long-term replicated trial in Rhode Island evaluated the yield performance and soil quality impacts of four small-scale food production systems over three summer growing seasons. While total marketable food yields (2.22 to 2.96 kg m-2) were modest compared to biointensive agriculture (4.64 kg m-2), individual crop yields often exceeded regional and national averages without soil quality loss. The study addresses a lack of experimental research on urban agriculture and provides a framework for normative research, offering more reliable yield estimates for modeling urban production potential.

Ananias Lima dos Santos, Ruandra Kaienne da Silva Laranjeira, Rodrigo Pereira, Maria Raquel de Carvalho Cota, Lionete Viana da Silva, Everton Ramos de Souza · Brazilian Journal of Development · Brazil

This study aimed to demonstrate that non-formal school spaces can serve as an alternative teaching-learning method for environmental education. The project, conducted with 5th-grade students at Escola Estadual Thomé de Medeiros Raposo, showed significant results from proposed activities and comparative questionnaire data. Students gained practical experience in conscious citizenship and adopted new behaviors through creating a school garden using recycled materials.

Tiare Saracino, Lynn Barber, Esen Momol, Tina McIntyre, Tom Wichman, Gail Hansen, Jen Marvin, Terra Freeman, Joseph Sewards, Wendy Wilber, Jacqlyn Rivas · DOAJ (DOAJ: Directory of Open Access Journals) · United States (Florida)

The objective of this publication is to address the important concern of maintaining edible landscapes in a way that protects the environment for Florida's water quality. It introduces the framework of the Florida-Friendly Landscaping™ principles and applies these principles to guide decisions about Best Management Practices (BMPs) for the care of edible landscapes.

José Silveira Filho, Marcelo Rodrigues Tenório · Cadernos de Agroecologia · Brazil

This qualitative research, based on Paulo Freire's dialogical pedagogy, aimed to develop environmental education awareness in elementary school students through organic agriculture and sustainable cultivation techniques in a school garden. Semi-structured interviews with students revealed that activities in the school garden contributed to modifying their habits and attitudes towards nature. The study found that the school garden fostered a sense of solidarity, group work, and the development of citizens capable of addressing social and environmental problems.

Yoshiki HARADA, Thomas H. Whitlow, Nina Bassuk, Jonathan Russell‐Anelli · Frontiers in Sustainable Food Systems · United States (New York City)

This study compared various soil mixes for rooftop farms to assess stormwater retention, yield, and quality of drought-sensitive crops. A 5-week greenhouse experiment cultivated leaf lettuce using an irrigation rate mimicking average growing season precipitation for New York City, comparing five soil mixes made of coconut coir, biochar, and animal manure compost, plus a commercial rooftop farm soil. Three soil mixes showed good yield with water retention rates up to 100%, and drainage nitrogen output levels were less than 13% of current levels at an operational rooftop farm in NYC.

J. M. Alomia-Lucero, Jorge Castro-Bedriñana, Doris Chirinos-Peinado · Advances in Science Technology and Engineering Systems Journal · Peru

This study designed and evaluated an agroecological system for a rooftop agricultural model in the high jungle of Peru, associating tomato plants (Rio Grande and Cherry varieties) with vegetable covers. The system demonstrated benefits for family food safety through pesticide-free tomatoes and created a plant barrier on roofs to reduce solar radiation. A new medium-sized tomato variety, suitable for the organic market, was also obtained through natural crossbreeding.

Susie Cochran, Leia Minaker · Canadian Food Studies / La Revue canadienne des études sur l alimentation · Canada (Ontario)

This paper reviews literature on community gardens, identifying gaps in translating their qualitative outcomes into monetary terms for municipal decision-makers. It describes a pilot return on investment assessment of a community garden in Ontario, Canada. Despite substantial data constraints, the limited available data suggest that community gardens could be an ROI-positive government investment.

Monika Egerer, Brenda B. Lin, Lucy Diekmann · Environmental Research Communications · United States (California)

In urban community gardens on the central coast of California, USA, gardeners' adaptation of management behaviors to drought was investigated across three periods: before, during, and after the longest drought. Structural equation modeling and multivariate analyses were used to assess the impact of water policies and gardener characteristics. Findings showed that nature relatedness and gardening experience influenced drought concern, which then impacted behavioral change. Water policies were found to promote and maintain behavioral change and conservation practices even when concern was absent.

Helda Morales, Bárbara Lazcano, Ana Isabel López García · · Mexico

This study compiles experiences from Mexico to explore how individual urban farming acts as an act of resistance. It describes food's role as a "common ground" where various political struggles intersect, including food sovereignty, gender equality, decolonization, climate change activism, indigenous rights, and social justice. The research also analyzes conditions that could facilitate a transition to broader political change and collective action, highlighting how planting actual seeds can yield not only ecological benefits but also social revolution.