Research & reports

Manda S. · Journal of International Development · Zambia (Chongwe, Lusaka)

This study examines how Zambia's COVID-19 'new normal' policies disrupted peri-urban food production and market access near Lusaka, finding that ~53% of small-scale farmers reported zero agricultural income and that policy responses lacked systematic agricultural support.

Harvey S., Mount P., Valentine H., Gibson C. · Journal of Agriculture, Food Systems, and Community Development, 11(4):233-247 · United States

Interviewing 12 farmers who participated in a gleaning program and 16 who did not in the Greater Kansas City metro area, this study analyses motivations for and barriers to donating surplus produce to food-rescue organisations such as food banks. Participants cited ease of donating and tax incentives; non-participants cited safety and liability concerns. It informs the design of food-rescue schemes that redirect urban and peri-urban farm surplus to community food aid.

Gumisiriza M.S., Ndakidemi P.A., Mbega E.R. · MethodsX, 9:101882 · Tanzania

A methods paper presenting a simplified, non-greenhouse hydroponic system built from low-cost, readily available materials using the Kratky method, with detailed step-by-step instructions. Requiring no specialised equipment or power, it offers a reproducible, self-buildable approach to soilless vegetable growing in confined urban spaces, supporting DIY and maker-style citizen food production.

Michael Carriere, David Schalliol · Journal of Urban History · United States (Milwaukee)

This historical essay documents the history of urban agriculture in Milwaukee, Wisconsin, complicating the "declensionist" narrative of the twentieth-century U.S. city. It argues that food production played a significant and often overlooked role in Milwaukee's economic, social, and spatial development, even during industrial expansion. The authors show that urban agriculture remained a viable tool for urban redevelopment, used by both public- and private-sector actors well into the twenty-first century.

Domenic Vitiello · Journal of Agriculture, Food Systems, and Community Development · United States

Using mixed methods, this article traces the evolution of urban agriculture practice, support, and policy in Philadelphia and Chicago since the 1990s, contrasting cities that treat farming and gardening as public goods with those seeking economic and redevelopment gains. It finds that while both cities became prominent urban farming centers, Chicago increasingly treated urban agriculture as a public good whereas its status in Philadelphia remained contested and unstable.

Celina L. Martinez, Daisy Rosero, Tammy Thomas, Francisco Soto Mas · Health Promotion Practice · United States (New Mexico)

This qualitative study assessed how community-supported agriculture (CSA) contributes to human capital and addresses social determinants of health in central and northern New Mexico, using questionnaires with 13 purposively sampled CSAs (8 responded). The responding CSAs reported activities such as training, job creation, education, access to healthy food, food security, health education, social connections, and food justice. The authors argue public health should support CSA and generate evidence on its health and social benefits.

Rüschhoff J., Hubatsch C., Priess J., Scholten T., Egli L. · Renewable Agriculture and Food Systems · Germany (Leipzig)

A Leipzig case study assessing food self-sufficiency potential, finding that combining organic agriculture, reduced food loss, and a more plant-based diet could reach a mean self-sufficiency level of about 95%.

Ejigu N., Sitotaw B., Girmay S., Assaye H. · International Journal of Food Science · Ethiopia

Evaluates water hyacinth biomass, alone or mixed with wheat/teff straw, as a low-cost substrate for oyster mushroom cultivation. The authors conclude water hyacinth is a promising cheap substrate owing to its ideal C/N ratio and low lignin, while also helping control the invasive weed.

Fernandes L., Fernandes J.R., Tavares P.B. · Solar · Portugal

Builds and tests two indirect solar dryer prototypes for fruits and vegetables using low-cost, reused materials (wood, styrofoam, recycled aluminum cans). Reports drying kinetics comparable to a commercial electric dryer, cutting waste from domestic over-production.

· Journal of Food Processing and Preservation · Brazil

Designs, constructs, and applies a low-cost solar dryer, studying the drying kinetics of araticum fruit pulp. Demonstrates a self-built, inexpensive dryer for preserving and adding value to produce.

· Aquaculture International · Global

The paper argues that low-cost aquaponics can support food security and socio-economic development in poor communities, and defines the critical success factors needed to realize such systems.

Gumisiriza M.S., Ndakidemi P., Nalunga A., Mbega E.R. · Sustainable Cities and Society · Africa

A cost-effectiveness analysis (net present value, internal rate of return, payback period) of a small-scale non-greenhouse vertical hydroponic system, examining its contribution to urban food security.

· Agriculture · Tanzania

Examines micro-investment by smallholders in affordable drip irrigation kits (bundled with seeds, inputs and advice) for vegetable production and improved livelihoods and nutrition.

· SOIL · United States

Describes an underground, wireless, open-source, low-cost system using LoRa to monitor soil oxygen, temperature, and moisture; the logging, power, and communication components cost about USD 150, much cheaper than commercial solutions.

Puig F., Rodríguez Díaz J.A., Soriano M.A. · Agronomy · Spain

Develops a low-cost, open-source IoT platform for smart irrigation that supports many sensors and can be easily integrated with other platforms.

Kim J.Y., Abdel-Haleem H., Luo Z., Szczepanek A. · Smart Agricultural Technology · United States

Develops a portable high-throughput phenotyping system using a microcontroller and a Raspberry Pi single-board computer, extended with soil moisture monitoring and water-pump control for automated irrigation using open-source electronics.

Florian Thomas Payen, Daniel L. Evans, Natalia Falagán, Charlotte A. Hardman, Sofia Kourmpetli, Lingxuan Liu, Rachel Marshall, Bethan R. Mead, Jessica A. C. Davies · Earth's Future · Global

A global meta-analysis extracting 2,062 observations from 200 studies reporting urban crop yields, compared across crops, urban spaces (allotments, rooftops, indoor systems) and growing systems. Urban yields were on par with or greater than global average conventional yields, with the largest gap for cucumbers and gherkins (17 kg m⁻² cycle⁻¹ versus 3.8 kg m⁻² cycle⁻¹ conventional). The authors flag significant limits: observations cluster in Europe (n=516), North America (n=398) and East Asia (n=361), with the seven most-studied countries supplying roughly two-thirds of the data and sub-Saharan Africa only 223 observations; many observations come from researcher-run field experiments with controlled inputs, which is likely to inflate yields relative to ordinary citizen plots; and the literature concentrates on leafy greens and tomatoes while fruit is barely studied.

Joshua Newell, Alec Foster, Mariel Borgman, Sara Meerow · Cities · United States (Detroit)

A study in Detroit's Lower Eastside (~15 sq. miles) examined the spatial extent, characteristics, and residents' perceptions of urban gardens using spatial analysis and interviews. Gardens covered less than 1% of vacant land and were often ephemeral. Primary obstacles to scaling up urban agriculture in Detroit include uncertainty over land tenure, environmental pollutants, potential ecosystem disservices, and a lack of government support and capital investment.

Nitya Rao, Sheetal Patil, Chandni Singh, Parama Roy, Charles Pryor, Prathigna Poonacha, Mariam Genes · Sustainable Cities and Society · Global

This systematic literature review analyzed 320 articles quantitatively and 86 qualitatively from a total of 4029, examining outcomes of urban and peri-urban agriculture (UPA) on sustainability and wellbeing. The review confirmed an exponential increase in UPA literature since 2015 and a regional bias towards the Global North. It identified six thematic outcomes across environmental, economic, and social sustainability pillars, with environmental sustainability being most discussed and gender and social differentiation least represented.

Andrea Fantini · Agroecology and Sustainable Food Systems · Global

This paper analyzes the functions of urban and peri-urban agriculture (UPA) as a strategy for sustainable and resilient urban food systems and for coping with global emergencies. It identifies various functions of UPA and how they connect, but also discusses obstacles to its large-scale implementation. The paper highlights that despite its potential, significant barriers hinder UPA's widespread adoption.

Grace Ning Yuan, Gian Powell B. Marquez, Haoran Deng, Anastasiia Iu, Melisa Fabella, Reginald B. Salonga, Fitrio Ashardiono, Joyce A. Cartagena · Heliyon · Global

This review examined urban agriculture (UA) across technology, socio-economy, and policy, noting that supporting UA expansion in cities is challenging due to its poor economic profitability. The study highlighted UA's value beyond profitability, including social, health and well-being, disaster risk reduction, and environmental benefits. It also presented advancements in UA technologies and plant biotechnology as potential solutions for increasing the future profitability of commercial UA.

Amy Lawton, Nicky Morrison · Land Use Policy · Australia (Greater Western Sydney)

This study examines the drivers of peri-urban agricultural land loss in Greater Western Sydney, Australia, with a focus on the role of government agencies. It found that competing housing priorities and private market interests continue to take precedence over protecting agricultural land. The research indicates that this trend will persist unless the current pro-urbanization narrative and associated political priorities are altered.

Imen Bendjemila, Salah Chaouche · DOAJ (DOAJ: Directory of Open Access Journals) · Algeria

Urban sprawl in N'Gaous, Algeria, expanded its land area by over ten times (from 33.7 to 379.7 hectares) and its population by over six times (from 4,887 to 33,515 persons) over 60 years. This rapid growth creates significant issues, particularly for peri-urban orchards, which are the primary economic activity. The study used an analytical approach with Geographic Information Systems to assess the agronomic potential of soils and quantify agricultural land consumed by construction, aiming to achieve an optimal agri-urban balance rather than merely avoiding urban expansion.

Marc François Richter, Luiza Vigne Bennedetti, Bruna Raquel Rodrigues Teixeira, Maico Ismael Klein, Angélica Gomes Florczak dos Santos · Confins · Brazil

This study mapped the concepts and benefits of urban gardens globally and in Brazil, presenting the history of urban agriculture and its modalities. A systematic literature review via Portal periódicos da CAPES corroborated various social, environmental, and economic advantages. In recent decades, Brazil has implemented federal, state, and municipal policies to support community garden projects, aiming to reduce poverty and ensure food security.

Dan Yan, Litao Liu, Xiaojie Liu, Ming Zhang · Land · Global

A bibliometric analysis of 605 papers from the Web of Science database (2001–2021) tracked global research trends in urban agriculture. The study found a substantial increase in publications, with the US, Germany, UK, Italy, and China being the most influential countries. Research focuses include food production, various functions of urban agriculture, and emerging topics like sustainability and the water-energy-food nexus. The analysis also noted that urban agriculture does not necessarily equate to a resource-conserving and environmentally friendly food system, suggesting a need for technology-based transitions for sustainable development.