Research & reports

Sandesh Thapa, Anjal Nainabasti, Sashila Acharya, Neha Rai, Rakshya Bhandari · International Journal of Applied Sciences and Biotechnology · Nepal (Kathmandu)

A key informant survey of 52 respondents was conducted in Kathmandu, Nepal, to assess the current status of rooftop gardening. All respondents expressed positive views on rooftop gardening, with rooftop farms covering 5-13% of the area. Significant monetary soft benefits were identified for food production, air quality, stormwater retention, and carbon sequestration. However, traditional methods using plastic bags, pots, and styrofoam were employed for garden maintenance. Constraints were recorded regarding rooftop farming establishment and continuation, indicating a need for proper training for efficient management.

Silvana Nicola, A. Ferrante, Giacomo Cocetta, Roberta Bulgari, Carlo Nicoletto, Paolo Sambo, Andrea Ertani · Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Horticulture · Global

The Covid-19 pandemic revealed the vulnerability of the agrifood system, with lockdowns disrupting long-distance fresh vegetable supply chains and causing dramatic declines in local market sales. While purchases concentrated in supermarkets, increasing crowding risks, gardening can increase opportunities for local and fresh food availability. Scaling up local food production is important to enhance community resilience.

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.

Catalina Cruz-Piedrahita, Caroline Howe, Audrey de Nazelle · Global Transitions · Global

This scoping review analyzed 138 papers to develop a conceptual framework on the impacts of urban horticulture (UH) on public health in the Global North. While UH is proposed as a tool for health improvement, the review notes a lack of systematic information on its benefits, barriers, costs, and risks in these regions. The framework visualizes relationships between UH and public health, providing evidence for both positive and negative connections regarding mental health, physical activity, diet, and socialization.

Barbara Maćkiewicz, Raúl Puente Asuero, Antonio Garrido Almonacid · Quaestiones Geographicae · Spain

This study investigated how urban allotment gardens in Baeza, Andalusia, Spain, affect the city’s sustainable development. The research showed that allotment gardens in Baeza endorsed all three pillars of sustainable city development: ecological, economic, and social. However, it was found that developing broader community relations on the city scale, reviving the declining local grocery market, and disseminating environmental initiatives that allotment gardens could promote and facilitate were missing.

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.

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.

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.

Kimisato Oda, Christoph Rupprecht, Kazuaki Tsuchiya, Steven R. McGreevy · Sustainability · Japan (Kyoto)

A study in Kyoto City, Japan, examined agricultural land use from 2007–2017 to assess urban agriculture as a sustainability strategy for shrinking cities. Analysis revealed a 10% decline (209 ha) in agricultural land use over ten years, with main post-agricultural uses being residential (40%) and vacant land (28%). The findings indicate that Kyoto City is not currently positioned to benefit from population decline through localized food production.

Liku Workalemahu Habtemariam, KetemaAbebe Tufa, Lise Byskov Herslund, Patience Mguni · Progress in Development Studies · Ethiopia (Addis Ababa)

This article explores water resource management in Addis Ababa's condominium housing and urban agriculture cooperatives to identify challenges and potentials for water-resilient livelihoods. Findings indicate both communities are heavily affected by water stress, with farming communities being vulnerable due to natural asset dependence but more flexible than condominium residents facing malfunctioning infrastructure. Potential for resilience exists if policy frameworks integrate local situations with landscape-based stormwater management.

Manabika Sheel, Mohammad Bashir Ahmed, Shamim Ahmed Kamal Uddin Khan, Md. Matiul Islam · Fundamental and applied agriculture · Bangladesh (Khulna City)

A study in Khulna City from March to April 2018 interviewed 60 rooftop gardeners to analyze the scenario and problems of rooftop gardening. The study found that gardeners earned very poor economic benefits compared to their expenditures, with most preferring it as a hobby (98.33%) or for aesthetics (90%). Severe problems included excessive heat (91.67%), lack of proper nourishment (87.08%), and roof load (72.92%).

Erwin van Tuijl, Gert-Jan Hospers, Leo van den Berg · European Spatial Research and Policy · Global

This paper explores the concept of Urban Agriculture (UA) and discusses its locational and strategic dimensions. Using case examples from cities worldwide, it shows that UA can contribute to the social, environmental, and economic pillars of sustainable city development; however, there are limitations that cities investing in urban agriculture should consider.

Miguel A. Altieri, Clara I. Nicholls · Agro Sur · Global

Although urban agriculture (UA) is estimated to provide 15-20% of global food, its significant contribution to city food self-sufficiency is questionable due to low yields in most existing urban farms. Agroecology can enhance UA's productive potential by offering key principles for designing diversified, productive, and resilient urban farms. This paper describes principles and practices for increasing soil quality and enhancing plant health.

Melinda R.S. Moata, Oskar Kollo, Yofris Puay, Yos Rhuma, Charles Tlonaen, Zakharias Duka · PARTNER · Indonesia (Kupang)

This survey evaluated 10,078 hectares of unmanaged land in Lasiana, Kupang city, Indonesia, to assess its capability for urban agriculture. The study found that two land units were classified as Class III land capability due to limiting factors such as soil depth, erosion level, soil fertility, drainage, and stoniness. Recommendations for land management included increasing soil depth and applying urban forest or urban farming development with multifunctional land uses.

Ibrahim Aliyu Kankara, Hani Farouk · Annals of Geographical Studies · Nigeria (Kano)

This research evaluated potable water distribution problems in Kano municipal, Nigeria. Using data from 384 questionnaires and investigations of water supply institutions, the study concluded that water supply in Kano municipal does not meet demand due to problems such as insufficient water treatment plants, power failure, and funding shortages.

Celile Özçiçek Dölekoğlu, Sema Gün · Turkish Journal of Agriculture - Food Science and Technology · Global

Urban agriculture, practiced by 800 million people globally, offers economic, social, and environmental benefits but also carries risks and adverse effects. This study presents developments in urban agriculture in Turkey and worldwide, discussing all aspects of its effects and outcomes.

Christine Hvitsand · Agroecology and Sustainable Food Systems · Norway

This article explores why Norwegian producers and consumers engage in Community Supported Agriculture (CSA), identifying distinct values and motivations related to environmental protection, justice, health, participation, and communication. While CSA demonstrates transformational power in the agri-food system through sustainable practices and power reallocation, the challenge remains to upscale these actions and prevent the dilution of core values and agroecological practices.

Sostenis Sampeliling, Santun R.P. Sitorus, Siti Nurisyah, Bambang Pramudya · Analisis Kebijakan Pertanian · Indonesia (DKI Jakarta)

This study analyzed key factors influencing the sustainability and policy development of urban agriculture in DKI Jakarta, Indonesia, using MDS and Rap-Ur-Agri methods. The analysis found that the existing sustainability status of urban agriculture development had an index value of 48.70%, indicating it was less than sustainable. Key factors for sustainable urban agriculture include yard area, eco-friendly commodity and technology development, agricultural extension and institutions, expansion of farming land/space, stakeholder cooperation, and agricultural incentives.

Araceli Calderón Cisneros · Dialnet (Universidad de la Rioja) · Mexico (Chiapas)

This qualitative study analyzed the role of family urban agriculture in urban sustainability in San Cristobal de Las Casas, Chiapas, Mexico, using open and structured interviews. The visited agricultural systems showed characteristics favoring resilience and sustainability, such as low use of external inputs and recycling of domestic waste. However, a limitation found was that the contribution of own production to family consumption is very low, despite existing food, environmental, and socio-cultural motivations for its continuity.

George Martin, Roland Clift, Ian Christie · Sustainability · Global

This exploratory study examined three urban cultivation sites in New York, London, and San Francisco to assess their nutritional, ecological, and social sustainability contributions. Field analysis revealed very low food outputs relative to the populations of their catchment areas, indicating that most urban food will continue to come from outside urban peripheries. The study concluded that urban food growing's sustainability benefits are more social than agronomic or ecological.

Jin-Hee Ju, Won-Tae Kim, Hui Xu, Young-Han Yoon, Eun‐Young Choi · Journal of Environmental Science International · Global

This study investigated the influence of hydrophilic polymer (HP) mixture ratio on the growth of eggplant (Solanum melongena) for lower maintenance urban agriculture via green roofs. As the hydrophilic polymer mixture ratio increased, the growth index, number of leaves, leaf length, leaf width, and dry weight of shoot and root decreased. Specifically, these values were significantly lower in HP5.0% and HP10.0% treatments compared to the control, and the survival rate was lowest at 56% in the HP10.0% treatment.

Kit Yieng Chan, Michelle Chan, Oi Yan Chan, Thomas Y.K. Chan, Tsz Mei Chan, Sharon B. Chang, Kenrick Chau, Tarik Chelali · cIRcle (University of British Columbia) · Canada

Research at the University of British Columbia (UBC), Canada, investigated whether rooftop gardens could reduce greenhouse gas emissions and food transportation carbon emissions. While edible landscapes could potentially assist with climate goals, they require careful selection of crops, buildings, and resources. Preliminary calculations indicated that rooftop and community gardens would do very little to reduce the UBC campus's dependency on imported food.

Ranka Junge, Andreas Graber · Zürcher Hochschule für Angewandte Wissenschaften digital collection (Zurich University of Applied Sciences) · Global

This paper discusses the need for practical tools and a stronger scientific base for sustainable urban farming, noting that visionary schemes often lack current practical application with available technologies. It identifies requirements for urban food production, including high quality, safety, and cost-effectiveness, and suggests innovations in planting, pest control, irrigation, and integration with existing building infrastructures. Aquaponics is presented as having the potential to contribute to all these aspects.

Larissa Vásquez-Moreno, Ana Córdova y Vázquez · International Journal of Urban Sustainable Development · Mexico (San Cristobal de Las Casas)

This study developed a conceptual framework to assess urban agriculture's (UA) potential contributions to urban sustainability (US). The framework was applied to a qualitative analysis of UA practices in San Cristobal de Las Casas, Mexico. The study found a rich practice of UA in the city and that the framework was valuable for evidencing data and stimulating analysis. However, the study also discusses limitations of UA and further refinements needed for the framework to guide actions towards increasing UA's impact on urban sustainability.

Anushiya Shrestha, Rajesh Sada · · Nepal (Kathmandu)

Climate change and its impacts on peri-urban agriculture were investigated in four peri-urban villages in the Kathmandu valley, Nepal. Temperature showed an increasing trend, while rainfall was erratic with no distinct pattern. These changes primarily had negative impacts on agriculture, leading to increased crop pests and diseases and a decline in crop production.