Research & reports

Милена Йорданова, Вера Петрова, Цветелина Николова, Елена Цветкова, Milena Yordanova, Vera Petrova, Tsvetelina Nikolova, Elena Tsvetkova · Bulgarian Portal for Open Science · Global

This article considered the potential risks of contamination in urban agricultural products. Urban agriculture, particularly in large cities, areas with heavy traffic, or near industrial zones, can lead to the accumulation of heavy metals in vegetable crops due to air pollution, traffic pollution, and other sources. Consuming these contaminated fresh vegetables is noted to potentially deteriorate human health.

Kate Gardner Burt, Gail Mayer, Rachel Paul · Local Environment · Global

A systematic review analyzed 277 community gardening articles to assess outcomes of community garden participation related to food justice, synthesizing 31 studies. Many positive impacts were indicated across seven social and dietary outcomes. Community garden participation was positively correlated with community connectedness, but evidence demonstrating diet improvement was neutral. Methodological rigor in study design and lack of participant racial/ethnic and socioeconomic diversity were common issues, leaving the effectiveness of community gardening as a strategy for a more equitable food system unclear.

Sandesh Thapa, Rakshya Bhandari, Anjal Nainabasti · Ecofeminism and Climate Change · Nepal

A random sampling survey in Dhulikhel, Kavrepalanchok district, Nepal, found that while all respondents perceived rooftop farming as beneficial, many could not practice it due to constraints like fear of roof damage. Practicing farmers also faced difficulties managing rooftop gardens due to a lack of proper knowledge and reliance on non-recyclable planting materials.

Martí Rufí-Salís, Felipe Parada, Verónica Arcas‐Pilz, Anna Petit‐Boix, Gara Villalba, Xavier Gabarrell · Frontiers in Plant Science · Spain (Barcelona)

This study investigated a closed-loop crop cascade system in a Barcelona rooftop greenhouse, using tomato leachates to irrigate five successive lettuce cycles. The results showed that low yields (below 130 g per lettuce plant) were obtained when the cascade system was used during the early stage of the donor crop, as the nutrient amount, especially nitrogen, was insufficient for the receiving lettuce crop. Additionally, electrical conductivity values became too high (near 3 dS/m) at the end of the donor crop cycle, indicating limitations in maintaining optimal conditions throughout.

Alison Hope Alkon, Yahya Josh Cadji, Frances C. Moore · New York University Press eBooks · United States (California)

In North Oakland, California, USA, collaborations between food justice organizations and residents, spurred by gentrification, were explored. The partnership and merger of Phat Beets Produce and the Self-Help Hunger Program were analyzed, initiated after a community garden was used in a gentrification advertisement in 2014. While this collaboration created a strong alliance, it was found to be insufficient to resist the structural forces driving gentrification.

Ana Carla Alves Gomes, Maria Lúcia Brito da Cruz · Revista Campo-Território · Brazil

This study investigated the spatial distribution of Urban Agriculture (UA) in Fortaleza, Brazil, particularly in the Lagoa Redonda neighborhood, and the permanence of these gardens amidst territorial disputes over urban space. Using bibliographic and secondary data surveys, site visits, and geoprocessing techniques, it analyzed the feasibility of UA reproduction and the implementation of specific policies for the activity. The study points to governance challenges, specifically territorial disputes concerning the permanence of urban agriculture in urban spaces.

Razzaq Ahmed, Shaukat Khan, Khalida Mahmood, Ahsanullah · Irrigation and Drainage · Pakistan (Karachi)

Agricultural activities in the Gadap Basin, Karachi, Pakistan, showed a declining trend over two decades from 1997 to 2016. Analysis of 13 irrigation water samples revealed that water quality had severely degraded, with sodium concentration substantially increasing, especially near sand and gravel excavation sites. While 100% of samples were suitable for irrigation in 1997, this dropped to almost 50% by 2016, and SAR also decreased, indicating irrigation water quality degradation. Satellite imagery further showed a 60% decline and degradation of agricultural land in the basin during the same period.

Stefan Staehle · sub\urban zeitschrift für kritische stadtforschung · Global

This study offers an alternative perspective on the critical practice of urban gardening, highlighting the ambivalence of the phenomenon. Specifically, the decoupling of social and artistic critique is shown to lead to a programmatic weakening of initiatives and their co-optation by neoliberal urban policies. This can reverse the critical practice of spatial appropriation into its opposite.

Jongwoo Kim · · South Korea

This study aimed to propose activation measures for school-based urban agricultural education in South Korea, using focus group interviews with teachers and literature analysis. Teachers reported a lack of school gardens, particularly open-field plots, and difficulties in management, highlighting the need for personnel. They also noted the use of container gardens to compensate for the lack of space and the selection of crops for student harvesting experiences.

C. K. Cartagena · Southeastern geographer · United States

This paper reviews "Farming While Black: Soul Fire Farms Practical Guide To Liberation on the Land" by Leah Penniman and Karen Washington. The book serves as a step-by-step guide for Black farmers, detailing historical struggles and solutions against oppression and racial discrimination in the farming sector, including cases like Pigford v. Glickman and the over-policing of Ron Finley's property. It offers instruction on obtaining land and resources, farm business plans, land restoration, crop planning, preserving harvests, raising animals, urban farming, and movement building. The book acknowledges obstacles faced by Black farmers and aims to provide a reference for sustaining productive farmland and activism to achieve land autonomy.

Reuben Nwoye Okechi, Edna Ifeoma Chukwura, Christian Okechukwu Nweke · Journal of Advances in Microbiology · Nigeria (Owerri)

This study, conducted in Owerri, Nigeria from June to December 2019, evaluated the interactive toxic effects of ternary mixtures of sodium dodecyl sulfate (SDS) and divalent metals on Serratia marcescens (SerEW01) from the Otamiri River, a source for urban farming. The study found that both concentration addition (CA) and independent action (IA) models predicted lower toxicities compared to experimentally observed data. The Toxic Index and Model Deviation Ratio indicated a synergistic interaction of SDS and metal ions, resulting in higher combined toxicities than predicted, posing environmental hazards due to co-contamination.

Bruce G. Ferguson, Helda Morales · · Mexico (Chiapas)

The Laboratorios para la Vida action research team in Chiapas, Mexico, trains educators to use school gardens and local food systems as venues for experiential learning. However, teachers face a host of hurdles to successful garden programs, including high teacher turnover, lack of space, and the difficulty of matching garden growth with the national curriculum calendar.

Andrea Baier, Christa Müller · · Germany

This chapter discusses the results of semi-structured face-to-face interviews conducted in 2016 with activists in three urban community gardens in Bremen, Cologne, and Kassel, Germany. The study focused on the relationship between urban projects and municipal administrations. It showed that initiatives taken by grassroots activists to form collaborations with administrative actors are limited, though the traditional role of citizens can be extended in new local partnerships.

Jeroen Schütt, Bas Amelung · · Europe

This research, conducted by the Science Shop of Wageningen University and Research, estimated the monetary value of ecosystem services in the Lutkemeerpolder, Amsterdam, which is slated for conversion into a business park. The study identified food production, air purification, recreation, and the effect of greenery on housing prices as key services, valuing them at 1.5 to 8.6 million euros per year. These ecosystem service values were not considered in the original decision-making twenty years ago, leading to a recommendation to reconsider the development plan.

H. Tayal Neeraj · · Global

This chapter explores the potential of home gardening, as part of urban agriculture, to contribute to human health through improved nutrition. While home gardens can provide nutrient-dense foods, the potential health impact of soil contamination must be addressed, as urbanized soils tend to have elevated levels of heavy metals and other toxins.

Luca Sára Bródy, Mandy de Wilde · Local Environment · Netherlands (Amsterdam)

Based on a qualitative study of 19 community gardening projects in Amsterdam, this research argues that community gardens function as “controlled space.” Various institutional governance actors, including local government, welfare organizations, green NGOs, and housing associations, exert varied levels of influence and control over the gardens. These relations both impair and enable the civic participation of gardeners, the inclusive potential of gardens, and an alternative, local food provision and distribution.

Mila Siti Fatimah, M.S Ir. Eko Hanudin, Ph. D. Toru Watanabe · · Vietnam

This study investigated heavy metal contamination in soils, vegetables, and irrigation water in peri-urban agricultural areas of Hue, Vietnam, from May 2018 to January 2019. Samples from three sites revealed that while irrigation water and agricultural soils were not seriously contaminated, 14% of vegetables were contaminated by Cr, 76% by Cd, and 47% by Pb. The consumption of vegetables was categorized as a tolerable health risk.

Govinda Prasad Devkota, Sheri Lee Bastien, Petter D. Jenssen, Manoj K. Pandey, Bhimsen Devkota, Shyam Krishna Maharjan · International Education Studies · Nepal

This Participatory Action Research study in Nepal investigated five teachers' perceptions of using urine diversion dry toilets (UDDTs) and human urine as fertilizer in school gardens. Few teachers accepted human urine as fertilizer, considering it impure and expressing unwillingness to use it on crops. Teachers disliked UDDTs due to perceived bad odor and uncomfortable sitting positions, especially for females, and felt urine as fertilizer was unnecessary.

Adrián H. Hearn, Thaís Mauad, Chris Williams, Luís Fernando Amato‐Lourenço, Guilherme Reis Ranieri · Journal of Urbanism International Research on Placemaking and Urban Sustainability · Australia (Melbourne)

This article analyzed the phenomenon of urban agriculture promotion by real estate developers and community associations in Melbourne and São Paulo. Developers of upmarket condominiums advertise urban agriculture as a purchasable commodity, but the gentrifying effects of these developments deepen rather than alleviate social and environmental ills. In contrast, community projects in four case studies emphasized urban agriculture's ability to confront the long-term neglect of land, employment, and environment.

Anna Shortly, Thembela Kepe · Forests Trees and Livelihoods · Canada (Toronto)

This paper explores the opportunities and challenges of incorporating foraging practices into parks planning and management in Toronto, Canada, where foraging is often not permitted in urban parks. The study, based on a scan of practices and interviews, concludes that urban parkland managers should establish dedicated spaces like community orchards to safely and sustainably accommodate foraging, acknowledging current restrictions.

Maria Vasile, Cristina Grasseni · Anthrovision · Italy

This study investigated urban gardening in Turin, Italy, using ethnography, historical analysis, and photography. In post-industrial, multicultural Turin, the hegemonic power of aesthetic assumptions about the urban green illuminated the dialectic of gentrification vis-à-vis socioeconomic and cultural diversity. It highlighted that the homogeneity of an aesthetic regime contrasts with the diverse 'skilled visions' of social actors, leading to restraining effects on participatory governance.

Moisés Savian, Mari Inês Caríssimi Boff, Pedro Boff · Cadernos de Agroecologia · Brazil

This study evaluated Brazilian scientific production from 2009 to 2018 on urban agriculture's contribution to food and nutritional security, analyzing 34 selected articles out of 612. It found that while agrobiodiversity is present in urban agriculture areas, pesticide use is a reality in some crop plots. The research suggests urban agriculture must be based on agroecology to avoid environmental contamination and produce healthy food.

Esther Sanyé‐Mengual, Kathrin Specht, Jan Vávra, Martina Artmann, Francesco Orsini, Giorgio Gianquinto · Sustainability · Italy (Bologna)

This study compared perceptions of urban agriculture (UA) ecosystem services (ESs) among different societal groups in Bologna, Italy, namely UA project leaders, stakeholders, and the general public, with 406 individuals evaluating 25 ESs via a standardized Likert-scale survey. Statistical analysis indicated that the general public and UA stakeholders agreed on the high relevance of socio-cultural ESs, while provisioning ESs were considered less significant. This study reveals a lower perception of provisioning ESs from urban agriculture.

Amsalu Woldie Yalew · Regional Economic Development Research · Ethiopia

This paper provides an overview of urban agriculture in Ethiopia, synthesizing existing evidence on its role in the overall agricultural sector, urban economy, and urban employment, based on official reports and statistical surveys. Despite scant evidence, urban agriculture shows considerable contributions. However, the review reveals existing gaps in institutional and policy support for urban agriculture.

Gülşah KURU, Esra DEMİR ÖZTÜRK, Furkan Atmaca · İlköğretim Online · Global

A study using semi-structured interviews with 30 primary school teachers and 12 school managers revealed opinions on the evaluation of primary school gardens. The majority of participants believed their school gardens were inadequate, citing examples such as a lack of playgrounds, insufficient green areas, and the use of gardens as car parks.