Research & reports

Stavrianakis, Farmer · Children Youth and Environments · Global

This study investigated the impacts that gardening education workshops in community gardens can have on family members and their environmental behaviors. Participants reported a variety of positive impacts from the gardening workshops, including socializing, health benefits, and acquired knowledge. However, there was limited evidence of pro-environmental behavior change beyond gardening.

Perrine Hamel, François Mancebo, Clément Feger, Stéphanie Hamel · HAL (Le Centre pour la Communication Scientifique Directe) · France

This chapter presented three case studies illustrating how nature's benefits have been incorporated into urban planning decisions, specifically urban agriculture policy in Nantes and Bordeaux, France, and an integrated urban water management strategy in Melbourne, Australia. The cases demonstrated that urban green space provides multiple benefits, including efficient water management, food production, recreation opportunities, and biodiversity protection. Key opportunities and barriers for incorporating urban nature into planning were identified.

Rayeheh Khatami, Toktam Hanaei, Mohammad Reza Mansouri Daneshvar · Zenodo (CERN European Organization for Nuclear Research) · Iran (Mashhad)

This paper analyzed the impact of urban agriculture and urban food systems on environmental planning in a non-western city region context, using Mashhad city, Iran, as a case study. Employing qualitative approaches, a survey of documentary studies and planning tools integrated with face-to-face interviews with experts explained the role of the food system in the environmental planning process. The study examined the role of food in creating agricultural gardens as a means to improve the agricultural system in a non-western country.

Gaston E. Small, Paliza Shrestha, Geneviève S. Metson, Katherine Polsky, Ivan Jimenez, Adam D. Kay · Environmental Research Communications · United States

Survey data from 142 gardeners and urban farmers in the Twin Cities Metropolitan Area, USA, characterized phosphorus (P) and nitrogen (N) inputs and harvest, and measured soil P concentrations at a subset of sites. Median application rates were 300 kg P/ha and 1400 kg N/ha, with low nutrient use efficiencies (2.5% for P, 5.0% for N). Garden soils had a median Bray P value of 80 ppm, far exceeding recommended levels, indicating a buildup and potential loss of P and N. Urban gardens, though only 0.1% of land area, constitute one of the largest inputs of P to the watershed.

Alma Clavin · Manchester University Press eBooks · United Kingdom

A study using qualitative, visual methods and Amartya Sen’s Capability Approach in five community garden sites in the UK and Ireland examined their potential for human agency and ecological sustainability. While positive agency and wellbeing benefits were observed, the gardens were found to be limited in their ability to truly enhance political freedoms and overcome asymmetric power relations. The research indicates that these initiatives may perpetuate neoliberal forms of unsustainable and uneven development, alongside ongoing issues of tenure insecurity.

Roland Ebel · HortTechnology · Mexico

This paper introduced the chinampa system, an urban farming model developed by the Aztecs in the Lake Xochimilco region of Mexico City. Chinampas are raised fields on small artificial islands in freshwater lakes, characterized by capillary irrigation and soil fertility generated from aquatic components. This system provides ecosystem services such as greenhouse gas sequestration and biodiversity diversification, and offers a potential solution for food supply and ecosystem services in modern cities.

Yaowaret Jantakat, P. Juntakut, Sasikarn Plaiklang, W. Arree, Chomphak Jantakat · ˜The œinternational archives of the photogrammetry, remote sensing and spatial information sciences/International archives of the photogrammetry, remote sensing and spatial information sciences · Thailand (Nakhonratchasima City)

This paper conducted a spatiotemporal analysis of urban agriculture (UA) areas and types in Nakhonratchasima City, Thailand, using Google Earth images from 2007, 2011, 2015, and 2018. A segmentation-based classification method in QGIS identified eleven UA classes, including truck crops and floricultural crops. Truck crops had the greatest cover in the study area, while floricultural crops covered the minimal space over the study periods. The analysis revealed different spatiotemporal change patterns, composition, and rates, showing how human-induced activities affect UA change patterns and rates.

Andy Lockhart, Simon Marvin · Antipode · United Kingdom (Sheffield)

This article explored the phenomenon of automated environmental control, using three sites in Sheffield, UK: a botanical glasshouse, a luxury hotel, and a university plant growth research lab. The study identified technical and ecological tensions and limits of indoor environmental control at each site, which restrict the scope of automation. It also showed that maintaining desired conditions required considerable hidden labor and energy.

Nenad Židak, Nidžara Osmanagić Bedenik · The holistic approach to environment · Global

This paper investigates whether urban gardening is a fashion trend, utopia, or the future, using an integrative approach. Employing The World Café Method with experts in biology, chemistry, and geography, the research compared these three aspects. Results indicated that the future aspect of urban gardening holds a primary and dominant role, despite fashion and utopia providing interdisciplinary impulses.

Sally Brown, Ned Beecher · Compost Science & Utilization · United States

This study modeled the carbon benefits and costs of biosolids compost use in King County, Washington. Soil carbon sequestration was highest for use on disturbed soils, such as new housing developments, neglected urban soils, or highway right-of-ways (–1.1 Mg CO2eq per Mg compost), and lowest for use in well-tended yards or other highly maintained landscapes (–0.036 Mg CO2eq per Mg compost). Compost use for tree growth, calculated over a 30-year period, added above-ground sequestration benefits ranging from –1.53 Mg CO2eq per Mg compost for a mature tree grown on a healthy soil to –4.58 Mg CO2eq per Mg compost for a newly planted tree grown on a disturbed site. Assuming a 20 km haul distance, transport costs ranged from 0.005 Mg CO2eq per Mg compost for delivery in a 5 Mg truck to 0.09 Mg CO2eq per Mg compost for pick up in a personal vehicle.

Esther Sanyé‐Mengual, Kathrin Specht, Erofili Grapsa, Francesco Orsini, Giorgio Gianquinto · Sustainability · Europe

This study evaluated 11 urban agriculture case studies across Italy, Germany, France, and Spain to identify innovation triggers, characterize novelties, assess their innovativeness, and link them to sustainability. Researchers found 147 novelties, with more in environmental and social dimensions than economic, often originating from specific problems. The analysis suggests that innovativeness enhances overall sustainability in urban agriculture projects.

Lindsay K. Campbell, Erika S. Svendsen, Renae Reynolds, Victoria Marshall · Social & Cultural Geography · United States (Rockaway, NY)

This study used Actor Network Theory to explore the material and social dynamics of a coastal community garden on public housing grounds in Rockaway, NY, after Hurricane Sandy. Three assemblages with different governance arrangements—tidal shore, garden plots, and treed lawn—were identified. However, "unruly" actors and actants, including people, saltwater, poison ivy, dogs, and trash, were found to spark controversy and resist governing.

Nicolette Tamara Jonkman, Boris Jansen · Current Opinion in Environmental Sustainability · Sub-Saharan Africa

This literature review on urban agriculture (UA) in Sub-Saharan Africa (SSA) identifies a significant constraint: conflicting stakeholder perceptions of UA, which hinders its development into a sustainable business. Some view UA as illegal and unsustainable, while others see it as a means to food security and employment. The review highlights a knowledge gap regarding land-use history and its effect on UA soil composition and nutrient status, proposing that UA sustainability requires understanding this historical context to build inclusive business models.

Anna Boneta, Martí Rufí-Salís, Mireia Ercilla‐Montserrat, Xavier Gabarrell, Joan Rieradevall · Frontiers in Plant Science · Spain (Barcelona)

This study analyzed an 18 m2 polyculture rooftop soilless urban home garden in Barcelona city center from 2015 to 2017 to estimate its degree of self-sufficiency and sustainability. A total productivity of 10.6 kg/m2/year was achieved, estimating that 5.3 m2 would be needed to fulfill the yearly vegetable requirements of an average citizen. While a high degree of self-sufficiency was achieved, fertilizers and their associated leachates accounted for the highest environmental impacts in all studied categories.

Michael Osei Asibey, Mohammed Abubakari, Charles Peprah · Cogent Food & Agriculture · Ghana

This paper investigated how urban farmers in Ejisu-Juaben Municipality, Ghana, cope with input and crop price fluctuations. Data from 380 respondents identified four major factors influencing input price volatility (oil prices, exchange rates, cocoa producer prices, and inflation), but farmers had no coping strategies for these. Crop price fluctuations were influenced by natural and demand/supply factors, and farmers coped by adding value to crops and diversifying income sources, among others. However, shifting to cocoa cultivation and farming in flood plains was shown to have adverse environmental and ecological implications.

Jan Vávra, Petr Daněk, Petr Jehlička, Miloslav Lapka · · Czech Republic

An analysis of large-scale representative survey results in Czech towns and cities investigated urban gardens as a source of self-grown food. The study found that while food production in urban areas is less frequent than in rural areas, the level of self-sufficiency in urban households is similar to that in rural households. This paper presents data on the scale of urban food production and its contributions to ecosystem services and resilience.

Heide Studer · · Morocco

This text focuses on urban food production in Moroccan towns, discussing existing practices and their changes during urbanization. It notes that urban food questions, including food accessibility, food sovereignty, and environmental aspects, are gaining importance in international debates due to increasing urban spaces and populations. Urban food production contributes to health for the affluent and food security for poorer populations.

Robert Bartłomiejski, Maciej Kowalewski · Sustainability · Poland

This article discusses Polish urban allotment gardens (UAGs) as an alternative urban development framework, "Slow City." It notes that increasing problems of soil pollution, abandoned gardens, informal housing, and limitation of access to UAG green areas for other inhabitants reinforce the pressure to reduce the number of UAGs.

N.S. Al-Ghumaiz · International Journal of Design & Nature and Ecodynamics · Saudi Arabia

This study assessed agronomic characteristics of eight bread wheat genotypes grown organically on low fertility soil in Saudi Arabia's arid Qassim region during the 2010 and 2011 growing seasons. Experiments compared conventional and organic farming systems at two locations, measuring chlorophyll content, flag leaf area, and harvest index. Findings showed differences between farming systems, with specific genotypes like YR and E-line identified as potentially suitable for sustainable organic wheat production in arid regions.

Valéria . Calipo, Tassiane Boreli Pinato, Sartori Aparecida Marcia, Zambone Maria Sabatine Alessandra, Santi Eduardo Santi Carlos · · Brazil (Diadema)

This work proposes the "Community Garden: New Paths and Knowledge" project, aiming to involve university students in paid internships and volunteer work at the Diadema Municipal Government and Methodist University of São Paulo. The project seeks to contribute to the socioeconomic development of the region and reduce vulnerable communities. Students from various courses will visit community gardens weekly, with some also participating in daily paid internships.

Emily N. Ander · Carolina Digital Repository (University of North Carolina at Chapel Hill) · United States (Orange and Durham counties)

This 2019 paper from the University of North Carolina at Chapel Hill explores the concept of urban agriculture, defining it as an industry located within or on the fringe of urban areas that grows, raises, processes, and distributes food and non-food products. It notes that community gardening is the most well-known and common form of urban agriculture in the United States. The paper aims to define the research question and identify key principles for the success of urban agriculture, particularly in the context of community gardening.

Michael Martin, Sofia Poulikidou, Elvira Molin · Sustainability · Global

This study used life cycle assessment (LCA) to evaluate the environmental performance of using urban residual material flows in vertical hydroponic farming. It assessed replacing conventional growing media with paper, compost, and brewers’ spent grains, and conventional fertilizers with biogas digestate. The results indicate significant environmental performance benefits when conventional growing media are replaced, and substantial potential benefits, though less significant, when fertilizers from residual urban streams are used, suggesting potential for more circular hydroponic systems.

Ignacio Carreño, Wenjun Ma · Current Urban Studies · Global

This multi-cluster quantitative and design research describes a methodology for establishing agricultural productive public spaces in cities, focusing on community participation. A case study in Shanghai, China, demonstrated how urban agriculture, in various modes, can address urban needs and improve environmental and urban conditions. The research provides a methodological approximation for formalizing local spatial development with a participatory approach, aiming to increase urban sustainability and meet the socioeconomic needs of communities.

Wasana De Silva · International Journal of Design & Nature and Ecodynamics · Sri Lanka (Anuradhapura)

This research examines urban agriculture in Anuradhapura, Sri Lanka, arguing it forms a 'performing system' that connects people with the city's topography and promotes wellbeing. It explores how daily life, intertwined with agriculture and irrigation around reservoirs and paddy fields, fosters spiritual experiences and contributes to a healthy and sustainable city, drawing on phenomenology, anthropology, and Buddhist philosophy.

A. J. Sarker, Janet F. Bornman, Дора Маринова · Urban Science · Australia

This study analyzes policy and planning practices for integrating urban agriculture into city land-use planning in Australia. It found that recent planning has overlooked and failed to realize the opportunity of urban agriculture, with regulatory and legal frameworks, including land access, being significant constraints. The study concludes that without direct public policy support and institutional recognition, integrating urban agriculture into Australian cities' development and planning goals is difficult.