Research & reports

Khumalo N. Z., Sibanda M., Mdoda L. · Frontiers in Nutrition · 南アフリカ・エテクウィニ市（ダーバン）

A multi-stage sample of 412 small-scale urban crop farmers in eThekwini municipality, South Africa, with a conditional mixed process model relating a composite index of climate-smart agriculture adoption (agroforestry, conservation agriculture, crop diversification, rotation, cover crops, drought-tolerant crops, mulching, organic manure, wetland use, soil conservation) to farm income and a wealth index. Adoption was positively associated with both, but the authors state the estimated income association is "relatively modest" and should be read with caution. Several socio-economic variables showed counterintuitive associations, and because existing agricultural training showed a weak association with income-enhancing adoption, the authors call for context-specific, outcome-oriented training and extension rather than more of the same.

Aziva Aulia Manggaramitha, Dea Rizky Amalia, Muhammad Aviv Adhitya Putra Pratama, Sry Reski Mulka · Golden Ratio of Community Services and Dedication · Indonesia

A study in RT 11, Belimbing Sub-district, BTN PKT Bontang Housing Complex, Indonesia, examined the implementation of the Neighborhood Association (RT) fund policy for community empowerment programs. Despite adequate funding, community participation in programs such as urban farming remained relatively low, typically 60–75% of the 20-person quota. While communication, resources, implementer disposition, and bureaucratic structure functioned relatively well, increasing community participation remains a challenge due to socioeconomic factors like work commitments and time constraints.

Kinga Kimic, Magdalena Błaszczyk · Sustainability · Poland (Warsaw)

This study identified and assessed vegetable cultivation projects submitted to the Warsaw Participatory Budget (WPB) between 2015 and 2023. The research classified projects into six types and evaluated them across social, functional, ecological, and economic dimensions. The results showed that vegetable-related projects in the WPB were decidedly niche, with only 101 initiatives submitted and 31 implemented, primarily focusing on education for children rather than direct food access.

Natalie Meyer, Simona Trandafir · Journal of Environmental Economics and Policy · United States (Rhode Island)

A choice-based survey of over 600 US residents from Rhode Island examined preferences and perceived value for green rooftop (GR) space allocations for agriculture, solar energy, and recreation. Latent class modeling revealed that Class 1, representing 20% of respondents, was generally unsupportive of GR installation and expressed disutility towards GR space allocation for solar energy. Both classes uniformly favored allocating GR space for agriculture production and showed a positive willingness to pay for this feature.

Gang Wang · Agricultural History · China (Shanghai)

This historical analysis of Shanghai's vegetable supply system examines the limitations of peri-urban agriculture. In the early 1950s, Shanghai relied on distant rural areas for vegetables, shifting to suburban production in 1958 after rural sources were cut off. Efforts to sustain this suburban-centric system faced challenges, and government attempts to phase out the planned economy in the 1980s had limited effect. By the early 1990s, the suburban-centric system was abandoned, leading to a return to nonlocal vegetable predominance.

Abdullah Abdullah, Abdul Haris, Andi Wisneni, Annas Boceng, Maemuna Nontji, Anwar Robbo, Muhammad Munawir Syarif · Zenodo (CERN European Organization for Nuclear Research) · Indonesia (Makassar)

A study in Makassar City, Indonesia, evaluated the multidimensional sustainability of urban agriculture (UA) through expert discussions and semi-structured interviews with 23 purposively selected stakeholders including academics, practitioners, urban planners, legislators and government officials. A Multidimensional Scaling (MDS) approach compared sustainability indices from two previous studies, supplemented by prospective and interdependence analyses to identify key leverage factors. Results showed the overall sustainability status of UA in Makassar during 2016-2020 remained "less sustainable," with a multidimensional sustainability index of 43.02%; the ecological (51.84%) and technological (65.09%) dimensions improved to moderately sustainable status, while the economic (46.15%), social (49.81%) and institutional (39.20%) dimensions showed declining sustainability performance. The study proposes three policy directions: strengthening UA planning and management systems, improving institutional coordination among stakeholders, and expanding UA's socio-economic and environmental functions.

Liz Ignowski, John Luis Lagdameo, Liel Gonzalez, Arma Bertuso, Pepijn Schreinemachers · Urban Agriculture & Regional Food Systems 11(1) · Philippines (Quezon City, Metro Manila)

A quantitative survey of 300 urban food producers in Quezon City, one of the 17 cities of Metro Manila, examining who practises urban agriculture, the methods and technologies used, the challenges met and the benefits gained. Production is mainly small-scale and subsistence-oriented, with commercialisation limited except among those with access to agricultural land. Self-produced food does increase access to fruit and vegetables, but participation reflects economic vulnerability rather than food sufficiency, and both scale and commercialisation depend strongly on land access — a structural barrier in dense cities. The authors conclude that urban agriculture in Quezon City acts as a safety net rather than an income source, while also providing enjoyment and stress relief, and that urban food-security policy should be realistic about the limited role of urban food production.

James Comtois · Institutional Investor · Global

Signatories to the UN Principles for Responsible Investment grew from 63 institutions with $6.5 trillion under management in 2006 to 2,450 with $80 trillion in 2019. The article reports a research paper by Demirer and Zhang arguing that institutional ESG investing is largely herding driven by fad, reputational concern and fund flows, and has improved neither corporate ESG engagement nor investment performance. At the time of writing, global ESG fund inflows had fallen 50 per cent over the previous year, with a record $12 billion withdrawn in a single quarter.

Nkrumah B. · Urban Science · アフリカ（都市部・系統的レビュー）

A systematic review of the irony between abundant arable land and persistent hunger in African cities. It asks why a disproportionate share of urban residents do not produce their own food, even as food insecurity rises with heavy reliance on market-bought food, high poverty and rapid urbanisation, screening peer-reviewed literature via PRISMA and five inclusion benchmarks to clarify the debate on low uptake of urban agriculture.

Leanne Idzerda, Calin Lazarescu, Tricia Corrin, Eric Vallières, Alix Couture, Sara Khan, Lynn McIntyre, Valerie Tarasuk, Alejandra Jaramillo Garcia · Health Promotion and Chronic Disease Prevention in Canada · Canada

A systematic review (PROSPERO CRD42021254450) searching four databases to 19 February 2025, with duplicate independent screening, risk-of-bias assessment and certainty grading, on food-based interventions that could reduce household food insecurity (HFI) in Canada. Exposure to food voucher programmes may reduce HFI, but exposure to food box, community gardening, school food, hunting and fishing, and food charity programmes may have little to no effect on HFI. The authors conclude that because HFI is primarily an economic problem, food-based responses are unlikely to have a major impact on overall HFI and a more comprehensive public policy approach is required. This is direct counter-evidence to framing community gardens as a food-insecurity intervention.

Meredith L. Mull, Mario Torralba · Frontiers in Nutrition · Global

This exploratory Q-methodology study investigated how university students in sustainability programs conceptualize sustainable food systems. Analysis revealed five distinct narratives, with consensus on food security and transparent governance. However, elements like urban agriculture, GMOs, and food traditions were consistently deprioritized by the participants. The findings emphasize incorporating plural perspectives and context-sensitive approaches in food system research and policy.

Dauda Rotimi Awoniran, Temitayo Abayomi Adeseye, Shakirulah Olayemi Agboola, Shade Babalola · Sustainability Science and Resources · Nigeria (Lagos)

This study examined agricultural land use change in Lagos Metropolis, Nigeria, between 1984 and 2024 using Landsat satellite images and spectral indices. Findings indicated that farmlands in the study area declined by 13.03% between 1984 and 2013, and by 21.79% between 2013 and 2024. Between 1984 and 2013, 89.48% of farmlands were converted to other land uses, and between 2013 and 2024, 73.51% were converted. Normalized Difference Vegetation Index (NDVI) results also indicated a deterioration in the environmental condition of urban farmlands.

Fetty Dwi Rahmayanti, Andi Gunawan, Anas Miftah Fauzi, Edi Santosa · Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) · Indonesia (Jakarta)

A mixed-methods study assessing biodiversity risk from urban agriculture activities in East Jakarta, Indonesia, combining a literature review with a field survey of questionnaires on respondents' perceptions of biodiversity risk to flora and fauna. The results showed the p-value exceeded the alpha level (0.05), indicating that urban agriculture in East Jakarta does not significantly affect biodiversity risks to flora and fauna.

Ministry of Sustainability and the Environment, Singapore · Ministry of Sustainability and the Environment, Singapore · Singapore

On 26 September 2025, Minister Grace Fu replied to a parliamentary question on progress toward the "30 by 30" goal, stating that less than 10% of Singapore's food consumption is currently produced domestically. She called the goal "aspirational," set before COVID-19 under more favourable conditions, while noting locally produced hen eggs exceed 30% and beansprouts exceed 50% of local consumption, and that the alternative protein industry faces high energy costs and insufficient consumer acceptance.

Sreejith Aravindakshan, Hage Aku, Michi Tani · · India

This study investigated factors inducing the emergence, sustenance, and sustainability of urban agriculture using primary data from urban farming households in Kerala and Arunachal Pradesh, India. The research indicates that urban agriculture has provided questionable environmental gains and has not significantly improved urban food security, especially among the poorer sections.

Prajal Pradhan, Daya Raj Subedi, Kshitij Dahal, Yuanchao Hu, Prakriti Gurung, Sijal Pokharel, Sagar Kafle, Biplav Khatri, Sudeeksha Basyal, Monika Gurung, Aruna Joshi · Cell Reports Sustainability · Global

This systematic analysis of 1,450 urban agriculture publications examined its impacts on Sustainable Development Goals (SDGs). It found urban agriculture is linked to all SDGs, with 142 targets showing positive sentiments and 136 showing negative sentiments, with positive sentiments roughly double the negative. The study concludes that urban agriculture does not inherently contribute to sustainability, as its impacts depend on specific practices and require tackling identified hurdles.

Melissa Anna Murphy, Pavel Grabalov · ˜The œGeojournal library · Europe

A study of urban agriculture initiatives in Aarhus, Denmark, and Rotterdam, the Netherlands, explored how municipalities facilitate urban agriculture and its performance in public spaces. It identified four public service trajectories: increasing access and animation, contributing to social services, producing and distributing food, and building communities. The study found that food production and social services may be little suited for urban spaces requiring high public access, although benefits can reach a broad public if localized and facilitated appropriately.

Bernard Afiik Akanpabadai Akanbang, Millicent Awialie Akaateba, Prosper Issahaku Korah · Discover Cities · Ghana (Wa)

This exploratory cross-sectional survey in seven rapidly growing neighborhoods in Wa, Ghana, administered 285 questionnaires to residents to understand motivations, challenges, and constraints of home gardening. Results showed 56% of respondents had gardens, primarily motivated by beautification (56.1%) and food production (52.3%). Limited space (49%) and busy schedules (34%) were identified as main barriers. The study found that while garden ownership aligned with the autonomy need, the relationship need, which correlates with environmental motivations, was notably low among residents. This indicates a limited effect of environmental awareness on home gardening motivation in the surveyed population.

Cavani Guzmán, Pierina · Macedonian Journal of Medical Sciences (University of Skopje) · Peru (Lima)

This article discusses the impact of urbanization and industrialization processes on peri-urban agricultural production in the Nuevo Horizonte de Carapongo association in Lurigancho, Lima, Peru. The research analyzes the development of these phenomena and their relationship with the changes generated in the agricultural production of the area, contributing to the academic discussion on the deagrarianization process of peri-urban spaces.

Juliette Colinas, Francesca Ugolini, Mohammad Reza Khalilnezhad · Sustainability · Iran (Birjand)

In Birjand, Iran, a qualitative approach explored the usage and perception of public fruit trees and attitudes towards public usage and participation in two urban green spaces (Tohid Park and Akbarieh Garden). Semi-structured interviews were conducted with twelve visitors, four administrators, and eight workers. Almost all visitors had a high interest in picking fruit, but usage in these green spaces was low, partly due to social norms.

Shinta Prastyanti, Retno Wulandari, Adhi Iman Sulaiman · Palabra Clave · Indonesia (Yogyakarta)

This study in Yogyakarta, Indonesia, examined participatory development communication strategies in urban farming programs using observations, interviews, and focus group discussions. Findings indicate that while the communication strategy embodies community empowerment, the initiative has not been adopted by all community members. Additionally, harvests are limited to daily needs and have not significantly improved group members’ income.

Jaume Vilasís Pamos, Pablo Aránguiz, Stefhania Lozano, Guillermo Palau Salvador · Revista Lecciones Vitales · Spain (Valencia)

This study examines urban agriculture initiatives in Valencia, Spain, which adopt an agroecological approach to promote sustainable practices like composting. While these collective strategies aim for sustainable agricultural models and contribute to food sovereignty, they face significant challenges, particularly regarding access to water. The initiatives also engage in political action and promote equitable organizational models.

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.

Fauziyyah Nur Rachmadillah, Mochamad Yusuf · Jurnal Teknik ITS · Indonesia

In Kampung Ngemplak Sutan (Kampung Sayur Organik), Surakarta, Indonesia, sustainability of the local urban farming initiative was evaluated using primary data from observation, questionnaires and interviews plus secondary data, analyzed with Multidimensional Scaling and Rapid Appraisal for Sustainability (MDS/RAPS). The socio-cultural dimension scored highest at 75.44 ("very sustainable"), while the economic dimension scored lowest at 56.71 ("fairly sustainable"); the study also noted that urban farming there functions mainly as a side activity that receives limited attention and that community participation has been declining.

Setyardi Pratika Mulya, Delik Hudalah · Regional Sustainability · Indonesia

This study assessed sustainability based on agricultural intensity in peri-urban villages of Karawang Regency, Indonesia, using a village agriculture index (VAI), a village sustainability index (VSI) adapted from a local sustainability index via factor analysis, and a logical matrix analysis for level of agricultural sustainability (LoAS). Peri-urban villages with high agricultural intensity tended to show lower social welfare and economic development and higher disaster risk; high agricultural intensity did not necessarily ensure prosperity, and economic disparity existed among villages, leading the study to conclude that encouraging diversity in agricultural intensity is more important than promoting agricultural intensity itself.