Research & reports

Odiney Alvarez‐Campos, Gregory K. Evanylo · Journal of Environmental Quality · Global

The impacts of exceptional quality (EQ) biosolids and inorganic fertilizer applied for rehabilitating anthropogenic soils on potential nitrogen (N) and phosphorus (P) water quality impairment risk were compared. After two years, reclamation rates of biosolids resulted in soil P saturation ratios greater than the recommended 30% but lower than the 65% limit. While nitrate N (NO3–N) posed the greatest nutrient leaching risk, lysimeter-collected mass loading of NO3–N from reclamation rates was not greater than for the inorganic fertilizer.

Setyo Parsudi · Berkala Ilmiah AGRIDEVINA · Indonesia (Surabaya)

This study in Surabaya, Indonesia, aimed to identify urban farming models, community motivations, and obstacles faced in implementing urban agriculture. The study found that the most common urban farming models were hydroponics, followed by verticulture, fisheries, and rooftop gardens. Community motivations primarily included increasing income, utilizing empty land, pursuing farming hobbies, and using green open spaces. The main obstacles faced by the community were plant pests, lack of capital for development, extreme weather, and insufficient experience and knowledge in urban agriculture.

Kamal Prasad Acharya · Pedagogical Research · Nepal

This study in Nepal aimed to transform chemistry learning from textbooks to school gardens through activity-based learning, involving students and science teachers. In-depth interviews and participant observations revealed that science teachers' positivist congestions, rooted in a dogmatic approach to chemistry teaching, hindered students' eloquent engagement in school gardening activities. The study concluded that positivist epistemology and related traditions superficially forced activity-based chemistry learning in community schools.

Ibrahima Saidou · Journal of Environmental Science and Allied Research · Cameroon (Yaoundé)

A 2014 study in Yaoundé, Cameroon, surveyed 40 farmers and analyzed soil in two valley bed suburbs, Nkolodom and Nkolbisson, to identify soil constraints on urban agriculture. While nitrogen and phosphorus levels were adequate, soil salinity at Nkolodom was brackish to moderate (810 mS/m), potentially constraining crop growth. Soil fertility was also found to decrease with distance from farmers' houses.

Delphine Bernadette Ouédraogo, Delwendé Innocent Kiba, Zacharia Gnankambary, Sheick K. Sangaré, Diakouba Sirima, Hassan Bismarck Nacro, Michel Papaoba Sédogo · Journal of Agricultural Science · Burkina Faso (Ouagadougou)

This study investigated cropping practices and their drivers in 133 peri-urban farms near Ouagadougou, Burkina Faso. Soil sample analysis revealed that monoculture led to low soil organic carbon, while polyculture led to low soil available potassium. The socio-economic conditions of the farms explained up to 60% of the variability in cropping practices.

Martin Jayo, Eduardo de Lima Caldas · kult-ur revista interdisciplinària sobre la cultura de la ciutat · Brazil (São Paulo)

A study in São Paulo, Brazil, examined recent forms of appropriation of the urban agriculture agenda, using a historical analysis of urban agriculture practices by Caldas and Jayo (2019). It was observed that traditional urban agriculture discourses have been captured by new actors, including parts of the public sector opportunistically appropriating the theme and the real estate market promoting an imitation of urban agriculture as a marketing tool.

Alfan Prianggara, Gunanti Mahasri, Abdul Manan · Journal of Aquaculture and Fish Health · Indonesia (Surabaya)

A survey in Surabaya, Indonesia, investigated water quality and endoparasite prevalence in Nile tilapia (Oreochromis niloticus) from urban farming floating cage programs. Water quality parameters were measured, and average endoparasite prevalence was 5.71% for Eimeria spp. and 8% for Acanthogyrus spp. The study found positive correlations between water clarity, ammonia, and DO with Eimeria spp. prevalence, and between temperature, pH, nitrate, and nitrite with Acanthogyrus spp. prevalence, indicating a link between water quality and parasite infection.

Lemi Gonfa · · Africa

This paper reviewed the role of urban agriculture in socio-economic and environmental sustainability in Africa, drawing on theoretical and empirical literature. While urban agriculture is recognized for job creation, improved diet, and environmental benefits like urban greenery and biodiversity, challenges such as difficult land access, lack of experience, financial support, training, and credit facilities, as well as low land productivity, animal grazing, and theft, were identified. These factors present potential negative externalities and hinder the development of urban agriculture.

Sofia Nikolaidou · Manchester University Press eBooks · Europe

This chapter examines new forms of urban gardening, often involving informal and temporary reuse of vacant land, and their impact on urban green space governance and planning practices. Using examples from Greece and Switzerland, it highlights differences and similarities in practices, social and institutional contexts, and collaborative governance patterns. The study calls attention to the critical role of the temporary nature of these initiatives, which affects new configurations of urban green areas and public space, and related planning practices.

A Noussia · Research Open (London South Bank University) · Brazil

This paper discusses urban agriculture on city peripheries within a scenario of urban expansion, focusing on the Guaratiba neighborhood in Rio de Janeiro. It argues that the city's urban expansion process does not invest in the inclusion of urban agriculture activities within the area's socio-environmental dynamics.

Obinna Elijah Nworie, Junhao Qin, Chuxia Lin · Toxics · Global

This study investigated trace element uptake by wild herbaceous plants at a multiple trace element-contaminated site. It found significant variability in bioaccumulation and translocation factors among plant species, identifying some as hyperaccumulators for specific elements. The marked accumulation of trace elements in plant tissues suggests that the site may not be suitable for urban agricultural production.

Pepijn Schreinemachers, Mamounata Sandaogo Ouedraogo, Serge Diagbouga, Amadou Thiombiano, Serge Rodrigue Kouamé, Caroline Makamto Sobgui, Hsiao-pu Chen, Ray-Yu Yang · Journal of Development Effectiveness · Burkina Faso

A repeated cluster randomized controlled trial in 30 schools with 1,760 schoolchildren (8–14 years old) in Burkina Faso evaluated the impact of school vegetable gardens combined with nutrition education. The study found a small but significant increase in knowledge of sustainable agriculture (+5.0%) and food/nutrition (+6.6%). However, there was no significant increase in other outcome indicators, including fruit and vegetable consumption.

Julian Cribb · Cambridge University Press eBooks · Global

This paper points out that none of the world's megacities can feed themselves, and food chain risks pose an imminent threat of starvation. It presents concepts such as climate-proof food supplies, novel urban food production systems, the importance of urban permaculture, rewilding, and developing wise consumers as solutions to urban food risk. However, it does not explicitly state that these solutions fully resolve the issue of urban food self-sufficiency.

Candis M. Hunter, Dana Williamson, Melanie Pearson, Eri Saikawa, Matthew O. Gribble, Michelle C. Kegler · Local Environment · United States (Atlanta)

This study used five focus groups with Atlanta community garden leaders to investigate perspectives on composting, hygiene, and mulching, which are practices to reduce exposure to soil contaminants. Gardeners cited a need for more funding, volunteers, and training. A primary barrier to composting and mulching was concern about contamination of source materials, and participants did not directly link these practices to reducing soil contaminant exposure. Hygiene challenges included concerns about beneficial bacteria, inadequate water access, and limited supplies.

Neal Chalofsky · Advances in Developing Human Resources · Global

This paper reflects on the 35-year growth experience of the TPSS Food Cooperative, examining challenges faced by social entrepreneurship. It notes that individuals with vision often lack social movement learning (SML) and human resource development/organization development (HRD/OD) skills to grow and direct organizations, leading to their demise or a shift towards business over social aspects. The paper argues that lessons from the 1970s food cooperative movement can benefit contemporary social entrepreneurships.

Lucy Rose Wright, Ross Fraser Young · Manchester University Press eBooks · Global

This chapter introduces the concept of political gardening, contextualizing its rise within neoliberal processes and academic interest in urban gardening. It conflates political gardening with injustice, drawing on Rawls' theory of social justice. The chapter uses case study examples to define political gardening as a six-stage iterative process that participants undergo to address injustices and become engaged, democratized citizens.

A. Hegazy · Scientific Journal of Flowers and Ornamental Plants /Scientific Journal of Flowers and Ornamental Plants · Egypt

This landscaping study, conducted from 2017-2018, investigated eight school gardens in Mansoura City and Talkha District, Dakahlia Governorate, Egypt. The study revealed that most school gardens contained toxic plants like weeds and cacti, and that utilized areas were not correctly used with poor maintenance. Roof gardens and improved irrigation systems were suggested.

Joeli Silva de Souza, Ryzia de Cássia Vieira Cardoso, Lídice Almeida Arlego PARAGUASSÚ, Sidione Ferreira dos Santos · Revista de Nutrição · Brazil (Salvador-Bahia)

A cross-sectional exploratory study in Salvador-Bahia characterized community gardens, with five out of seven gardens participating and data collected from 13 horticulturists. 80.0% of gardens lacked land legalization, 100.0% operated without technical support, and 60.0% had no social organization. Major difficulties included lack of funding, volunteers, and water use restrictions, indicating insufficient policies limited technical support and financing.

Tinashe P. Kanosvamhira, Daniel Tevera · South African Geographical Journal · South Africa (Cape Town)

A mixed-methods study in Mitchells Plain, Cape Town, examined the linkages between urban gardeners and supporting actors using questionnaires and in-depth interviews. Findings indicate that the nature and strength of these linkages are critical for urban gardening success. However, there is minimal cooperation among non-state actors in the area.

Marco Picone, Filippo Schilleci · Nova Science Publishers (Nova Science Publishers, Inc.) · Italy

A critical essay examining an urban-garden participatory process underway as part of Palermo, Italy's "Laboratorio Palermo città educativa," launched by the municipality in 2015 to convert abandoned or degraded public green areas into urban gardens for educational activities across all ages, in the name of neighborhood community reappropriation. The paper argues that in a context of austerity urbanism, it is easy for the municipality to exploit the absence of public investment to mobilize active citizens as protagonists of urban change, and that the idea of creating urban community gardens—like other recent slogans such as smart cities and creative cities—tends to become a universally praised, virtuous development model without scrutiny. It further notes that the lack of an effective regulation governing the use of public green spaces in the city continues to create obstacles to the solutions proposed by the thematic working table. The author concludes that field-based qualitative research is still needed to determine whether these reappropriation processes conceal neoliberal dynamics that delegate a false decision-making power to citizens while using them to fill current political vacuums.

Shawna Holmes · Canadian Food Studies / La Revue canadienne des études sur l alimentation · Canada

Interviews with school food environment staff across Canada examined how provincial nutrition regulation changes affected food procurement. While the regulations opened opportunities to improve nutrient content and involve local producers or school gardens, some schools struggled to procure nutritionally compliant food because of higher costs of transporting produce to rural, remote or northern communities and logistical problems such as spoilage. Regulations improved food environments in some schools, but others still require more support.

Anne Barbillon, Christine Aubry, François Nold, Stéphane Besançon, Nastaran Manouchehri · Agricultural Sciences · France

This study assessed health risks from soil trace metals (lead, cadmium, mercury, copper, and zinc) at three urban farms near Paris (Ile-de-France region), evaluating two main exposure pathways: soil and vegetable ingestion. All three farms had soil trace-metal levels above geochemical background values and the thresholds used in France as reference values for sludge spreading. Using a Hazard Quotient (HQ)-based risk assessment (HQ being the ratio of estimated daily intake to tolerable daily intake), the riskiest scenarios were urban farmers working on-site daily year-round (HQtot = 1.02), child gardeners (HQtot = 1.29), and regular child consumers eating exclusively the farm's vegetables under a maximalist scenario (HQtot = 1.6). The adult gardener scenario followed (HQtot = 0.9), while the lowest-risk scenarios were adult consumers (HQtot = 0.62) and farm workers (HQtot = 0.45).

Baby Shaharoona, Said Al‐Ismaily, Ahmed Al‐Mayahi, Nadhira Al-Harrasi, Ruqaiya Al-Kindi, Abdullah Al-Sulaimi, Hamad Al-Busaidi, Mohammed Al‐Abri · Heliyon · Global

A study in A'Seeb city, Oman, combined a sociological questionnaire survey of residents' perceptions with sampling of pathogenic bacteria, water-soluble metals, basic cations, salinity and texture in soil and groundwater near urban gardens and municipal waste disposal sites. Most surveyed residents were not paying attention to the negative consequences of their activities on soil and the environment. Heavy metal concentrations were significant at some contaminated sites though still below international standards, while fecal contaminants were reported in some garden, waste-site and groundwater samples, identifying human pathogens in risk group 2 including Klebsiella pneumoniae, Shigella spp. and E. coli.

Annelise Caetano Fraga Fernandez, Almir Cezar Baptista Filho · Cidades, comunidades e território/Cidades comunidades e territórios · Brazil

This article describes the obstacles to applying Brazil's family-farming public policy in urban settings. It shows that a set of representations associated with rural agriculture has shaped the classification criteria used by rural technical-assistance (ATER) staff, and that this in practice limits how the policy can be applied in urban areas. It states that the mobilization of social movements linked to urban agriculture, specifically in the municipality of Rio de Janeiro, led to the construction of an initiative, but the available abstract breaks off at that point.

Wojciech Mrozik, Soydoa Vinitnantharat, Thunchanok Thongsamer, Nipapun Pansuk, Pavinee Pattanachan, Parinda Thayanukul, Kishor Acharya, Marcos Quintela‐Baluja, Charles R. E. Hazlerigg, Aidan Robson, Russell J. Davenport, David Werner · The Science of The Total Environment · Asia

A study of three family-owned peri-urban aquaculture operations downstream of Bangkok, Thailand — spanning extensive, semi-intensive and intensive practices — used micropollutant analysis, genetic markers and 16S rRNA amplicon sequencing to assess water quality against aquaculture standards. Canals draining Bangkok did not meet quality standards and were sources of faecal coliforms, Bacteroides, Prevotella, human E. coli, tetracycline-resistance genes and nitrogen entering the ponds, causing algae blooms. The aquacultures in turn discharged salinity and the herbicide diuron into the canals; diuron was detected in shrimp, though not at a level of concern to human health. The extensive aquaculture attenuated an estimated 20 population equivalents of nitrogen pollution and trillions of faecal coliform inputs per year.