Research & reports

Navin Ramankutty, Vincent Ricciardi, Zia Mehrabi, Verena Seufert · Agricultural Economics · Global

A review was conducted on the production, environmental, and socioeconomic performance of three alternative farming systems: organic, smallholder, and urban agriculture. Organic agriculture offers environmental, livelihood, health, and nutritional benefits but is hampered by lower yields and higher prices. Smaller farms exhibit higher yields and biodiversity but result in lower incomes for farmers. Urban agriculture can alleviate pressure on rural landscapes, provide nutritional benefits to the urban poor, and engage urban dwellers in food system challenges, but it cannot scale up to be a substantial solution on its own.

Greg Zandrow, Samir Malkani, Kerri Gosselin · PEDIATRICS · Philippines

A community garden program in a rural Filipino village, involving families of 67 children, aimed to assess the impact of community gardens and education on plant care and proper diet on malnutrition and food security. The study found that while the program helped reduce malnutrition, it also led to an increase in obesity.

Héctor Ávila Sánchez · Investigaciones Geográficas Boletín del Instituto de Geografía · Global

This study analyzed the impact and potential of Urban and Peri-urban Agriculture (UPA) on urban food systems, focusing on cities in Western Europe, North America, and Latin America. It concluded that while UPA practices have increased, their presence in urban food systems remains limited, and their consideration in territorial public policies is still marginal. In developed countries, its impact has been primarily therapeutic, landscape-related, and for heritage preservation, while in poorer countries, it has contributed to self-sufficiency for low-income urban populations, public space recovery, social fabric strengthening, and community development.

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.

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.

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.

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.

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.

Pepijn Schreinemachers, Dhruba Raj Bhattarai, Giri Dhari Subedi, Tej P. Acharya, Hsiao-pu Chen, Ray-Yu Yang, Narayan Kaji Kashichhawa, Upendra Dhungana, Gregory C. Luther, Maureen Mecozzi · Journal of Development Effectiveness · Nepal

This study evaluated the combined impact of school gardens and nutrition education on 10- to 15-year-old schoolchildren in Nepal, using a cluster randomized controlled trial with 1275 students (2014) and 785 students (2015). After one year, significant improvements were observed in children's awareness of fruits and vegetables, knowledge of sustainable agriculture, food, nutrition, and health, and stated preferences for eating fruits and vegetables. However, these improvements in intermediary outcomes did not translate into significant improvements in fruit and vegetable consumption or nutritional status.

Shobha Shrestha · Nepalese journal of geoinformatics/Journal of geoinformatics Nepal · Nepal

Using GIS, remote sensing and spatial metrics, this study analyzed the spatial structure and dynamics of urban land use, including agricultural land use, in Kathmandu Valley, Nepal, over the ten years from 2003 to 2012. Land use changed drastically over this period, with the most pronounced shifts occurring in the agriculture and built-up classes, signaling rapid urbanization; the valley's spatial structure moved toward a more heterogeneous and fragmented landscape, with new, isolated urban patches emerging inside what had been larger, contiguous agricultural patches and breaking them into smaller fragments.

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.

Cécile Faliès · Problèmes d Amérique latine · Chile (Santiago)

This article provides an overview of agriculture around Santiago, Chile, based on fieldwork conducted since 2005. Despite the presence of agriculture linked to Santiago and Valparaiso, and the emergence of some forms like organic farming, it is difficult to classify this as urban agriculture due to the peripheral location and limited number of plots. The study indicates that urban agriculture, as commonly defined, has a limited presence in the Santiago metropolitan area.

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.

Leila A. Graves, Harrison Hughes, Meena M. Balgopal · Journal of Agricultural Education · Global

This case study examined the implementation of a horticulture-based curriculum by two 3rd grade teachers and two STEM coordinators. While one STEM coordinator found the curriculum addressed academic science standards and provided relevant inquiry activities, the other STEM coordinator and teachers believed garden plants did not address science standards and only supported enrichment. This highlights a divergence in perception regarding the curriculum's alignment with academic standards.

Nida Bayındır · Route Educational and Social Science Journal · Global

This research investigated primary school teachers' pedagogical expectations regarding school gardens. The study found that 60.7% of primary school teachers considered their school gardens pedagogically insufficient. Teachers primarily identified a need for more pedagogical equipment in school gardens, and desired features like Atatürk busts, flags, mini activity corners, floor games, and functional sports fields.

Klaus Lorenz · Soil Science · Global

Urban agriculture (UA) engages approximately 800 million people globally and covers over 67 million hectares of urban cropland. While UA contributes to food security, growing food in urban ecosystems, particularly on degraded urban soils, presents challenges. Past research on UA has focused on social sciences, and although studies on urban soils have increased, many urban areas remain neglected. Further research and dissemination of knowledge are needed on how to maintain or enhance urban soil fertility through soil and land-use management practices.

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.

Maeve Bassett · Fordham Research Commons (Fordham University) · Global

Urban gardens are advertised as a solution to limited food access in impoverished areas, but they are not productive enough to globally affect food production and the environment. However, for surrounding communities, urban gardens are cheap and effective solutions for many problems associated with poverty and food deserts, such as obesity, education, social interactions, income supplementation, health issues, dangerous neighborhoods, and refugee assimilation.

Nobuhle Sebata, Clifford Mabhena, Mkhokheli Sithole · IOSR Journal of Humanities and Social Science · Zimbabwe

A qualitative study in Bulawayo, Zimbabwe, using data from 30 women, 5 key informant interviews, and 2 focus groups, examined urban agriculture's role in women's poverty resilience. While urban agriculture significantly improved food availability and access, its nutritional contribution was low due to a focus on maize, and income generation remained very low due to subsistence production.

Jonathan Crush · · Global

This article argues that cities of the Global South are experiencing a deepening crisis of food inaccessibility, marked by growing food poverty, hunger and malnutrition, lack of dietary diversity, child wasting and stunting, increased vulnerability to infectious and chronic disease, and a growing obesity epidemic. It states that this urban crisis remains largely invisible to the policy and research communities concerned with global food security, noting that there was more research and policy debate on urban food insecurity in the 1990s, when the Global South was less urbanized than today, and that concern with urban food security has since been displaced by the new international food security agenda and its pervasive anti-urban bias. It observes that the only aspect of urban food security currently commanding significant attention is urban agriculture, which it describes as widely, but improbably, seen as the key to achieving food security in cities of the Global South.

Terri Evans, Christiana Miewald · Journal of Agriculture Food Systems and Community Development · Global

Community gardens and other local food initiatives are insufficient strategies to replace the quantity and efficiency provided by contemporary globalized food systems for supplying cheap food to urban populations.