Research & reports

Administrative Region of Central, Thessaloniki, Greece, K.I. Maknea, Nikolaos Thymakis, Julia Nerantzia Tzortzi, A. Asănică · Romanian journal of Horticulture · Greece

Experimental research at eight sites in Thessaloniki, Greece, evaluated the impact of aromatic and medicinal plants on the urban microclimate. Sites with these plants showed a 10-15% temperature reduction compared to non-planted areas, and potted plants on simulated balconies led to a 5-10% temperature reduction. However, areas with dense vegetation and water features exhibited increased humidity and limited air circulation, creating adverse thermal comfort conditions.

Farhang FaghihLarijani, Elaheh Amani Vamarzani · DOAJ (DOAJ: Directory of Open Access Journals) · Iran

This study investigated whether an independent legal system exists in urban areas of Iran to recognize, maintain, and develop urban agriculture. It found that despite urban laws recognizing agricultural activities, legislators have not enacted a comprehensive law specifically for urban agriculture, nor explicitly included it in urban land definitions. The study hypothesized that a primary challenge is the lack of a compatible legal framework.

Catherine Oliver · Transactions of the Institute of British Geographers · United Kingdom (London)

This paper examines urban chicken-keeping in London, where urban spaces are transformed to accommodate chickens. It argues that the human-imposed design of urban barnyards is often impractical for chickens, leading to lawns being torn up, plants demolished, and vegetable patches consumed. Additionally, chickens are vulnerable to local foxes, highlighting that chickens' behaviors and territoriality often overflow their assigned space, challenging human design intentions.

Luke Beesley, Michael Hardman · Cities · Global

This opinion piece discusses the potential risks of urban agriculture (UA) practices within Green Social Prescribing (GSP), particularly in post-industrial regions. It highlights barriers related to heavy metal-enriched urban soils, emphasizing the need for greater awareness and management of these risks. The piece provides recommendations for improving knowledge exchange on urban soils and risk in GSP contexts.

Efadul Huq · International Journal of Urban and Regional Research · Bangladesh (Dhaka)

This article argues that in the global South, ecological infrastructure often displaces marginalized urban dwellers by erasing existing informal agricultural practices, or "green informalities." Based on research with urban farmers facing eviction in Dhaka, Bangladesh, it highlights that these green informalities are crucial for understanding grassroots practices and collective power-building. The study advocates for recognizing the political and affective dimensions of informal urban agriculture as a socially just ecological infrastructure that prioritizes justice and dweller agency.

Brenda B. Lin, Peter Bichier, Heidi Liere, Monika Egerer, Stacy M. Philpott, Shalene Jha · Sustainability Science · United States (California)

A study of 18 urban community gardens in Central Coast, California, USA, used gardener surveys and field measurements to evaluate food production and its distribution. Gardeners produced an average of four pounds of food per week, saving an estimated $16 USD weekly. However, gardeners with greater food insecurity (larger families or lower incomes) were not the largest producers, indicating uneven benefit distribution despite high overall productivity.

Almou Abdoulaye Alio, Alio Sanda Abdel-Kader, Alio Fody Mahamadou, Chaibou Yaou, Rabiou Mamane Moustapha, Hamidou Djelifa, SOUMANA SOUROUNDA Idé, Mahamane Idi Issa Abdoulahi, Lewamy Mamadou, Haoua Sabo Seini, Hassimi Sadou · Asian Journal of Biology · Niger (Niamey)

This study assessed the impact of irrigation water on the bacteriological quality of lettuce in three market garden sites in Niamey, Niger. Analysis of 18 lettuce and 29 irrigation water samples revealed high contamination across all sites with various bacteria, including total coliforms, fecal coliforms, enterobacteria, and E. coli. The irrigation water quality was found unsuitable for irrigation, significantly contaminating the lettuce and posing potential health risks to consumers.

Elliot Buckminster, Charlotte Breckenridge, Thomas Sedgwick · International Journal of Research in Agronomy · United Kingdom

This research quantified soil-to-plant transfer factors for six heavy metals (Cd, Pb, Zn, Cu, Ni, Cr) in lettuce, spinach, and carrot across 20 peri-urban agricultural sites in Berkshire, UK, from 2021-2022. Cadmium exhibited the highest mean transfer factor (0.31), and at 4 of 20 sites, cadmium concentrations in lettuce exceeded the EU maximum limit of 0.20 mg/kg fresh weight. Soil pH was a strong predictor for Cd and Zn transfer factors, with TFs increasing below pH 6.0.

Faiza Darkhani · Frontiers in Sustainable Food Systems · Germany (Berlin)

A qualitative content analysis of interviews with active female respondents in community-supported agriculture, food cooperatives, and self-harvest gardens in Berlin Brandenburg revealed challenges faced by women in alternative food networks. Interviewees expressed optimism but emphasized the need for increased governmental support and community engagement, and the data highlighted demands for gender equality improvements and support mechanisms.

Aminkeng Lucienne Fuanyi, Tata Emmanuel Sunjo, Balgah Sounders · Environmental Management and Sustainable Development · Cameroon

This study analyzed the implications of spatio-temporal land use/land cover (LULC) dynamics on wetland ecosystem services in the coastal areas of Limbe I and III Municipality and Douala IV Municipality, Cameroon, from 1986 to 2022, using GIS techniques. Over 36 years, wetlands retreated by -0.2km² (-0.96%) in Limbe I & III and -0.48km² (-0.14%) in Douala IV, while built-up areas increased by 0.75km² (0.36%) and 1.63km² (0.45%) respectively. These LULC changes, based on wetland regulating services, exposed neighborhoods in Limbe I & III to flood vulnerability and identified two categories of vulnerable neighborhoods in Douala IV.

Anna M. Roodhof · Journal of Agriculture Food Systems and Community Development · Netherlands

To map and analyze food forestry (FF) in the Netherlands, a survey of 109 participants and interviews with five experts were conducted, identifying 231 food forests established since 2017. The survey data indicates that while FF initiatives are diverse in goals, few focus on profitability. Practitioners are largely homogeneous, consisting of university-educated individuals aged 40 to 60.

Paula Mota Santos · Social Inclusion · Portugal (Porto)

Grassroots urban horticultural plots (hortas) in the Porto Metropolitan Area, Northern Portugal, are informal communities that have existed for decades, often involving over 20-30 people. However, these low-income urbanite horticultural communities are not cherished by city governance, which does not prevent their destruction. This incompatibility between urban governance and grassroots communities hinders the right to the city for the low-income urbanites who created them.

Yihang Hu, Junbiao Zhang, Yangmei Zeng, Jie Li · Land Degradation and Development · China

A study in Zhejiang Province, China, examined the impact of climate factors on agricultural production efficiency using a pooled OLS model. While precipitation production potential showed a significantly positive impact, the effects of temperature, evapotranspiration, and insolation were not significant or exhibited poor stability. Furthermore, the benefits of precipitation potential varied, with only a few cities experiencing significant improvements.

Silvia Gullino, Heidi Seetzen · · United Kingdom (London)

This ethnographic research in a former Victorian square in South London examined how residents transformed derelict spaces, including creating two community gardens, over three decades. The study found that while informal, bottom-up practices shaped a vibrant urban culture, the neighborhood is now undergoing progressive gentrification. This gentrification reflects trends in other London neighborhoods, posing challenges to community initiatives.

Belinda Li, Tammara Soma, Raghava Payment, Srishti Kumar, Nicole Anderson, Flora Xu, Phonpoom Piensatienkul · Canadian Food Studies / La Revue canadienne des études sur l alimentation · Canada

This study reviewed and categorized 73 food asset maps in Canada based on their included food assets and design characteristics. Most maps included built environment assets like grocery stores and food banks, as well as agriculture-based natural food assets such as farms, community gardens, and orchards. However, representations of Indigenous-focused food assets and non-agriculture-based natural food assets like forests, water bodies, and foraging areas were generally lacking. This lack of Indigenous perspectives reinforces the values of a settler-colonial food system within food asset maps.

Huq, Efadul · Smith ScholarWorks (Smith College) · Bangladesh (Dhaka)

Research in Dhaka, Bangladesh, indicates that ecological infrastructure often erases existing informal agricultural practices, leading to the displacement of marginalized urban dwellers. Based on engaged research with a collective of urban farmers facing eviction, this paper argues that green informalities are crucial for understanding grassroots practices and can be appreciated as socially just ecological infrastructure.

B.J.M. van Vliet, Kamonashish Haldar, Matthijs T. Wessels, Katarzyna Kujawa-Roeleveld, Gert Jan Veldwisch · Water International · Global

This study examined the governance of irrigated urban agriculture in Arusha, Tanzania, and Khulna, Bangladesh, from a service regime perspective. Findings showed how service regimes bridge the gap between formal governance institutions and practices around irrigated urban agriculture. It is concluded that acknowledging, facilitating, and aligning these regimes can strengthen governance arrangements.

Jean de Dieu Minengu, Aiko Ikonso Mwengi, Romain Kawanga, Simon Mwengi, Oscar Mangunda Yama · Revue Africaine d’Environnement et d’Agriculture · Africa

Market gardening in Kinshasa's urban and peri-urban areas faces multiple constraints, including land insecurity, low natural soil fertility, the incidence of diseases and pests, weak technical support, climate hazards, poor input supply, and problematic marketing systems. These constraints limit yields in production sites and hinder the development of market gardening activities.

Finn Bell · Critical and Radical Social Work · United States (Ypsilanti)

This qualitative study explored how marginalized agrarian traditions can aid communities in surviving climate change, conducting in-depth interviews with 23 marginalized food growers and community leaders in Ypsilanti, Michigan. The study found that while growing food builds resilience to food insecurity and climate change, it is difficult due to land injustice. Policy implications include the need for housing justice, proactive planning for climate refuges, and reparations for land rematriation.

Delf Rothe · Political Geography · United States (New York City)

This paper critically examines the concept of "green resilience" through a case study of various green resilience projects in New York City, including survivor trees, memorial groves, and community gardens. The study argues that these spaces function as key forms of state rule and biopolitical power, identifying three tensions or contradictions of green resilience as a form of biopolitical government: visibility and invisibility, knowledge and ignorance, and control and emergence.

Cosimo Dondini, Xavier Úbeda, Giacomo Certini, Marcos Francos · Journal of Soils and Sediments · Spain (Barcelona)

This study analyzed soils from ten urban gardens in Barcelona, Spain, with a special focus on possible contaminants. Irrigation water was also analyzed, and some of the waters contained a high concentration of salts and nitrites, which are listed as a pollutant. While three tests for heavy metals did not attest to significant pollution, other toxic elements not considered in this study could come from road transport gases or the port of Barcelona. Overall, the soil quality was concluded to be suitable for growing vegetables.

Lee D. Bryant, Roy Maconachie, Bastian Schnabel, Abubakarr Swaray, Howard Gigi, Solomon Gbanie, Kabba Haroun Bangura, Anthony Kamara, Prince Antwi-Agyei · Water Science & Technology Water Supply · Sierra Leone (Freetown)

This paper examined the environmental health status of three urban and peri-urban agriculture (UPA) sites in Freetown, Sierra Leone. Qualitative and quantitative data revealed heavy metal concentrations significantly exceeding regulatory limits in sweet potato leaves and arable soil. Additionally, soaring levels of faecal coliform bacteria were found in irrigation water, and crops were identified as hyperaccumulators for environmental contaminants.

Tri Wahyu Nugroho, Aulia Luqman Aziz, Hery Toiba, Ahmad Imron Rozuli, Suyadi Suyadi · JAPI (Jurnal Akses Pengabdian Indonesia) · Indonesia (Malang)

This community service activity in Mulyoagung Village, Malang, Indonesia, aimed to empower the local economy through urban farming by utilizing organic waste such as cocopeat and polybags as growing media. The program successfully enabled the community to adopt urban farming concepts, proving its effectiveness in addressing shrinking agricultural land and strengthening the local economy. However, it is also noted that sources of materials, human resources, and market access are among the obstacles causing urban farming failures.

Moses Wanyakha, Nancy Grudens‐Schuck, Ann M. Oberhauser · Journal of Agriculture Food Systems and Community Development · United States (Iowa)

This study investigated resilience and vulnerabilities in fresh produce donation partnership programs to food pantries in Iowa during the COVID-19 pandemic. Findings revealed a significant decrease in labor hours during the pandemic years of 2020–2021, attributed to government policies and social distancing requirements. Volunteer shortages, donation inconsistency, and exclusionary community practices appeared to be inherent vulnerabilities of volunteer-based food donation programs.

Legenda Samuel Pardede, Tomy Perdana, Dhany Esperanza, Endah Djuwendah · Jurnal Agristan · Indonesia (Bandung)

This qualitative case study investigated the internal supply chain risk management for mustard greens (sawi) at the "Buruan SAE Mang Oded" urban farming group in Bandung City, Indonesia. Using the House of Risk method, the study identified 23 risk events and 23 risk agents within the supply chain, with 14 priority risk agents requiring control. The findings indicate significant challenges in managing the internal supply chain, suggesting that the current system faces numerous risks that hinder efficiency and effectiveness.