Research & reports

Camille Dumat, Antoine Pierart, Muhammad Shahid, Sana Khalid · · Global

Urban agriculture, while a strategy for sustainable food production, faces a serious threat from natural and anthropogenic pollution sources in urban and peri-urban environments. These sources release hazardous organic and inorganic contaminants, leading to a high likelihood of human exposure. Consumption of vegetables grown on polluted urban soils or those that have intercepted metal-rich atmospheric particles represents a potential route of pollutant exposure and human health hazard.

Emmanuel Patroba Mhache, Elna Lyamuya · Huria Journal of the Open University of Tanzania · Tanzania (Dar es Salaam)

This review paper examined the role of urban agriculture in alleviating poverty for women in the Dar es Salaam Region, Tanzania. It found that women's participation in urban agriculture contributes to food security, increases household income (average net income Tshs 58,356.2 per month), offers employment, and reduces poverty. However, numerous bottlenecks hinder women's involvement in urban agriculture, including poor markets, water shortage, land shortage, seed unavailability, lack of capital, lack of government support, crude working tools, lack of water pumping machines for irrigation, poor storage facilities, and lack of agricultural extension services.

Miguel Izquierdo‐Díaz, Peter E. Holm, Fernando Barrio‐Parra, Eduardo De Miguel, Jonas Duus Stevens Lekfeldt, Jakob Magid · Journal of Environmental Quality · Global

This study evaluated air pollution in urban green areas using edible plants. Analysis of 36 unwashed leaf samples showed that plants exposed next to roads had higher contents of traffic-related elements, and outdoor samples were enriched in marine aerosol ions. Cadmium and lead concentrations did not exceed European legal maximum levels for vegetables, indicating their consumption would be safe.

Chiara Certomà, Martin Sondermann, Susan Noori · Manchester University Press eBooks · Europe

This chapter critically analyzes the relationship between urban gardening and socio-spatial justice, exploring whether and how urban gardening practices can tackle social and spatial injustices. Urban gardening points out less visible sides of urban governance and planning, unveiling different forms of power, dominance, and resistance to the unequal distribution of benefits and burdens in space. The analysis questions the contradictions in the constitution of urban spaces and their capability to mitigate material, political, and social exclusions, unfairness, and inequalities.

Milagros de la Caridad Mata Varela, Johana Meza Salvatierra, Ana Yilian Santana Mata · DOAJ (DOAJ: Directory of Open Access Journals) · Global

This research evaluated investment project management in urban agriculture through its life cycle, applying eighteen indicators and a management index. The study concluded that an agroecological farm development project exhibited economic inefficiency during its first two years of operation due to an imbalance between income and expenses, preventing high management values.

Efrat Eizenberg · Manchester University Press eBooks · Global

This concluding chapter reviews the literature on urban gardening, outlining both enthusiastic approaches that focus on its transformative potential and critical approaches that analyze it as greenwash or a strategy of neoliberal development. The chapter discusses how the book's chapters address this gap in understanding urban gardening and the resolutions and new directions they offer. It states that urban gardening is sometimes analyzed as a form of greenwash and a strategy of neoliberal development.

Daiara Batista Mendes · Geografia em Atos (Online) · Brazil (Pirapozinho)

This article identifies the potentialities of urban agriculture in Pirapozinho, São Paulo, focusing on food and economic use. Based on field research and interviews, the study found that urban agriculture provides quick access to quality products and fosters close farmer-consumer links. However, it also found that urban agricultural practices have not received due governmental attention at national or local scales, despite their potential.

Gaston E. Small, Sara Osborne, Paliza Shrestha, Adam D. Kay · International Journal of Environmental Research and Public Health ·

This study measured phosphorus (P) concentrations in native soil below four- and six-year-old urban garden plots, collecting soil cores from five plots of each age. It found that inorganic weakly exchangeable P was significantly elevated in native soil below garden plots (>35 cm deep) compared to reference profiles, indicating accumulation of excess P from compost. This suggests that while urban agriculture can recycle P, over-application of compost may contribute to soil and water pollution.

Rainer Einzenberger, Michaela Hochmuth · Digital Commons - Lingnan (Lingnan University) · China (Hong Kong)

An interview with Professor Kin-Chi Lau was conducted in March 2015 regarding the Urban Gardening Project at Lingnan University of Hong Kong. The interview portrayed the project's history, structures, and organizational characteristics, focusing on the challenges and difficulties participants faced in realizing the project.

Nadine Appelhans, Sabine Baumgart · · Morocco

An analysis of documents related to planning and agriculture and interviews with experts in Morocco indicated that urban and rural issues were treated as separate areas. Urban development affects daily travel distances as urban expansion changes distances between cultivated land and dwelling places. Data from Morocco show a lack of serious support for urban agriculture and animal husbandry in expanding urban agglomerations.

Meng YE, Tomohiko Yoshida · Urban and Regional Planning Review · China (Beijing)

This study examined user evaluations of allotment gardens in Beijing, China, where demand is rising. The overall evaluation was between good and general, with high marks for landscape and facilities but low marks for service, guidance, agricultural festival activities, rent, sanitary facilities, and skilled labor. The consortium operation mode received the best evaluation, while the individual mode had the lowest.

Tri Andika, Waryenti Deli, P.E.Suryaningsih P.E.Suryaningsih · University Of Bengkulu Law Journal · Indonesia

Residents in Lebong Regency, Indonesia, experienced anxiety due to a landslide at PT PGE's Hulu Lais cluster A site. This landslide resulted in 6 deaths, sinking fish ponds, rice fields, and community gardens, and crop failure. Additionally, residents' drinking water sources were polluted, and drilling caused loud sounds, ground vibrations, hot steam, and dried plants. The drilling also drastically reduced water discharge from the Mubai river, impacting residents who relied on it.

Kathrin Specht, Felix Zoll, Henrike Schümann, Julia Bela, Julia Kachel, Marcel Robischon · Sustainability · Global

Nineteen qualitative expert interviews were conducted to identify perceptions of sustainability, social acceptability, and ethical aspects of new urban food production approaches. While major perceived benefits included educational effects and efficient resource use, significant conflicts involved negative side-effects, legal constraints, and high investment costs. Acceptance barriers were largely tied to the "unknown," encompassing a lack of understanding of new approaches, uncertainty about benefits, health risk concerns, unfamiliarity with products, and ethical doubts about animal welfare. The study concluded that adapting the unsuitable regulatory framework, which discourages investors, is a crucial first step to foster dissemination of urban food production approaches.

Nicolás A. Mari, Nicolás A. Mari, Beatriz Giobellina, Beatriz Giobellina, Alejandro Benítez, Alejandro Benítez, Victoria Marinelli, Victoria Marinelli, Victoria Marinelli · Journal of Agronomy Research · Argentina (Córdoba)

A study mapped and quantified urban growth and land use in Córdoba, Argentina's Green Belt. Using remote sensing and GIS, it evaluated urban growth between 1974 and 2014 and land use in peri-urban and rural areas in 2015. The study revealed a 46.5% urban area growth over nearly 40 years, alongside an increase in farm plot size, indicating land ownership concentration and a reduced number of producers. This transformation highlights a conflict between peri-urban horticulture, industrial agriculture, and urban development.

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.

Chiara Certomà, Lorenzo Chelleri, Bruno Notteboom · Urban Studies · Italy (Rome)

This paper investigates informal planning practices and "fluid governance" in urban public spaces, using the case of Parco delle Energie in Rome, Italy, and a comparative analysis of international cases. It found that politically progressive urban gardening challenges traditional governance networks and redefines public space functioning by transforming green spaces into food production and collaboratively managed areas through informal planning. This demonstrates that urban gardening worldwide challenges traditional planning perspectives and governance, turning citizens' dissensus into a productive force.

Rebecca St. Clair, Michael Hardman, Richard Armitage, Graeme Sherriff · Urban Studies · United Kingdom (Manchester)

This study, conducted in Wythenshawe, Manchester, UK, highlights the difficulties of collaboration among organizations in a lottery-funded urban agriculture project. Due to local authority cutbacks and a lack of funding, community groups and charitable organizations compete for space and resources, leading to a "siege mentality" where organizational self-preservation takes precedence over cooperation. This paradoxically results in groups with similar goals working against each other instead of collaborating.

Guadalupe Del Ángel-Lozano, Martha Elena Nava-Tablada · DOAJ (DOAJ: Directory of Open Access Journals) · Mexico

This study analyzed technical-productive and socioeconomic limitations to urban agriculture adoption within the Urban and Periurban Agriculture Network (RAUP) in Xalapa, Veracruz, Mexico. Based on 25 questionnaires from active members and 10 from sporadic participants, both groups agreed that the main constraints are socioeconomic, such as lack of space and limited free time, which are linked to urban lifestyles. Technical-productive limitations were not considered relevant.

Satyendra Kumar Pothula, Parwinder S. Grewal, Robert M. Augé, Arnold M. Saxton, Ernest C. Bernard · Journal of Nematology · Global

A meta-analysis of 111 published articles assessed the impact of human interventions on soil nematode richness and abundance in urban, agriculture, and disturbed grassland ecosystems compared to natural grassland and forest ecosystems. The study found that overall nematode richness was higher in forest ecosystems than in natural grassland, disturbed grassland, urban, and agriculture ecosystems. The meta-analyses concluded that human interventions, specifically agricultural intensification and urbanization, adversely impact both the richness and abundance of nematodes, which serve as soil health bioindicators.

L.C. Obuseng · Botswana Journal of Agriculture and Applied Sciences · Botswana (Gaborone)

This review highlights the potential for heavy metal accumulation in soil and crops from urban and peri-urban agriculture (UPA) around Gaborone, Botswana, due to the intensive use of chemical fertilizers, pesticides, wastewater, sludges, and industrial effluents. A literature review showed that fertilizers contain heavy metals, and the use of treated or untreated sewage water by UPA farmers can lead to heavy metal accumulation in soil and crops, posing a danger to human health. Information on heavy metal accumulation in soils is limited in Botswana, despite high agrochemical use in UPA vegetable production.

Lisa Westholm, Madelene Ostwald · Agroforestry Systems · Africa, Asia, Latin America

This literature review of 104 scientific articles across Africa, Asia, and Latin America examined food production and gender relations in multifunctional land use systems. The review found that the specific role of landscape multifunctionality for women's food security opportunities is rarely explicitly studied. It also showed that products controlled by women are often secondary and far from markets, risking neglect by policymakers, and efforts to increase their value may adversely affect women's empowerment if powerful actors appropriate benefits.

Wendy Johanna Murcia Gulumá, Óscar Andrés Pérez Soler, Sindy Rodríguez Rodríguez · · Colombia (Bogotá)

This study provided advisory support to an urban garden in Bogotá, Colombia, named "Guerreros y Guerreras Unidos en Accion," which had been operating empirically since 2005 without formal legal status or strategic planning. The garden, primarily involving individuals over 50 without formal employment, sought to formalize its activities by establishing a foundation. The intervention aimed to guide the garden's members through the legal and administrative steps for formalization.

Guadalupe Del Ángel-Lozano, Martha Elena Nava-Tablada · Tropical and Subtropical Agroecosystems · Mexico (Xalapa)

This study analyzed technical-productive and socioeconomic limitations to urban agriculture adoption among members of the Network of Urban and Periurban Agriculture (RAUP) in Xalapa, Veracruz, Mexico. Researchers applied 25 questionnaires to active members and 10 to non-practicing participants. Both groups of RAUP participants identified socioeconomic factors, such as lack of space and limited free time due to urban lifestyles, as the main constraints, while technical-productive limitations were not considered relevant.

Nicole Paganini, Stefanie Lemke, Inês Raimundo · ECONOMIA AGRO-ALIMENTARE · Sub-Saharan Africa

This research explored the potential of urban agriculture in Cape Town, South Africa, and Maputo, Mozambique, through two baseline surveys among urban farmers and home gardeners, as well as qualitative in-depth interviews. Findings indicated that urban farmers and home gardeners add nutrients and diversity to their diets and can partly contribute to their income. However, in Cape Town, main challenges included access to local and external markets, fair pricing, and sovereignty in production.

Giuseppe Pulighe, Flavio Lupia · Sustainability · Italy (Milan)

A spatiotemporal quantification of urban agriculture in Milan, Italy, assessed its food self-provisioning potential using Google Earth images from 2007 and 2014. The study found that even in the best-case scenario, the current urban agriculture production (98 ha of vegetable gardens, 2539 ha of arable land) is insufficient to meet the vegetable and cereal consumption needs of over 1.3 million city residents. It could only satisfy approximately 63,700 vegetable consumers and 321,000 cereal consumers.