Research & reports

Kerstetter K., Roberts K. J., Trent R., Koch P. A., Casey C., De Jesus-Martin M., Trinidad A., Mampara J., Bacon B. · Journal of Nutrition Education and Behavior · 米国

A pilot study testing whether a multicomponent school garden and nutrition education intervention increases actual school lunch consumption. Students in grades 1–5 from matched pairs of public schools (one high-poverty and one low-poverty intervention school, each paired with a comparison school) were observed with the System of Observational Cafeteria Assessment of Foods Eaten over 13 days across 28 lunch periods, with consumption defined as the percentage of each entrée and side salad eaten. Students at intervention schools consumed 47.5% of the entrée and 44.1% of the entrée plus side salad, against 34.5% and 31.2% at comparison schools; adjusted models showed 0.13 (P = 0.006) and 0.11 (P = 0.01) more portion units consumed, with no significant treatment-by-pair interactions. The authors conclude that a cluster-randomised trial is warranted.

Nicholas Balfour, Johnstone Caitlyn, Emma Bush · Zenodo (CERN European Organization for Nuclear Research) · United Kingdom

A 2025 survey of 31 green spaces in central Edinburgh, UK, including allotments, public gardens, cemeteries and roof gardens, assessed pollinator diversity and resource availability. The pollinator community was a generalist assemblage dominated by bumble bees (45%) and honey bees (26%), while butterflies, moths and beetles were notably scarce. Semi-natural areas, allotments and cemeteries sustained the highest pollinator diversity, linked to native vegetation and rich floral resources. Two-thirds of the plant species recorded were non-native horticultural varieties, yet 87% of recorded plants were visited by pollinators, and the three plant species attracting the widest range of pollinator taxa were all indigenous.

Dina Oktavia, Yuni Amelia, Fitri Ammara Azhar, Radha Alizha, Widya Natasya, Nayla Putri Abdullah · Warta Dharmawangsa · Indonesia

Using descriptive qualitative methods combining literature review, observation, and interviews with urban farmers, mainly in Medan, Indonesia, and other major cities, this study analyzed urban farming business opportunities built on organic waste management as a form of green entrepreneurship. Converting organic waste into compost was found to reduce production costs, increase soil fertility, and support a circular economy, making urban farming a potentially profitable and environmentally friendly business opportunity. Young people play a strategic role in this development through innovation, digital technology use, and strengthening community networks, but limited knowledge, capital, and policy support remain ongoing challenges.

Siti Nurul Khotimah, Ihsanuddin Fadillah, Martinus · Nemui Nyimah · Indonesia

A participatory education program for household-level climate adaptation was delivered to seven housewives belonging to the Rumah Keluarga Indonesia community. The curriculum covered climate change impacts on food production, water and energy availability, the use of home yards for food production through urban farming with household organic waste, and simple technologies such as small solar panels for yard lighting. Following the activity, participants showed strong engagement and reported increased understanding and awareness of women's role in household food, water and energy resilience to climate change.

Intan Ratri Prasundari, Setyo Tri Wahyudi, Anthon Efani, Reny Tiarantika · Agrisocionomics Jurnal Sosial Ekonomi Pertanian · Indonesia

A study assessed the sustainability status of seven types of urban agriculture in Malang City, Indonesia — irrigated agricultural land, rainfed dryland farming, recreational activity, community gardening, commercial farming, agro-educational tourism, and institutional farming — using multidimensional scaling with the RAPHYTON tool. Primary data came from expert and supporting informant interviews plus field surveys and observation. Results showed the sustainability level of urban agriculture types in Malang City was generally in the "moderately sustainable" category. The ecological dimension of irrigated agricultural land was classified as unsustainable, while agro-educational tourism achieved the highest sustainability status, rated sustainable in the social dimension.

Dominik Bittner, Joanne U Smith, Georgios Leontidis, Grant Campbell, Jeanne Biegel, Pete Smith, Matthias Kuhnert, Rastislav Skalský, Licida M. Maria Giuliani, Abdul Walid Walid Salik, Paul Hallett, D Burslem, Getahun Yakob, Wolde Mekuria, Euan Phimister, Amare Haileslassie, Desalegn Tegegne, sarem norouzi, Heyu Chen, Cecile Gubry-Rangin, Adnan Khan · Environmental Research Letters · Sub-Saharan Africa

A narrative review examines tools for assessing soil health and Nature-based Solutions (NbS) for soil quality in sub-Saharan Africa, drawing primarily on examples from Ethiopia but intended for farmers and advisors across the region and other developing countries. It reviews physical, biological, chemical, functional, and service-related soil tests, noting that science-based tests require expertise, equipment, and cost, while locally-derived tests are affordable and readily applicable. NbS practices are assessed against labor, cost, and crop-production factors, and the review concludes there is no single universally applicable practice — suitability depends on farmers' priorities and circumstances. It also examines predictive methods, including mechanistic soil models, AI, and hybrid approaches combining data, physics, and knowledge such as digital soil mapping.

Ruma Chowdhury · Asian Journal of Advances in Agricultural Research · Bangladesh

A survey of urban agriculture in three Thanas (administrative wards) of Dhaka, Bangladesh — Bashabo, Gulshan, and Pallabi — examined the location, patterns, and processes of the practice. The survey found various types of urban agriculture in Dhaka, including vegetable gardens, ornamental plants, floriculture, pigeon and bird keeping, and dairy and goat farming. For most people it was found to be a hobby motivated by the aesthetic appeal it brings to houses and surroundings, with some residents growing fresh, chemical-free vegetables and fruit in their backyards. The city's agro-climatic conditions were described as well suited to flowers and foliage plants, floriculture was characterized as a new industry in Bangladesh, and dairy farming was reported to be common across every ward amid rising demand for milk.

Ana Paula Branco do Nascimento, Rafael Silva de Araújo, Thais Reis Rocha, Ramoel Serafini · Revista Nacional de Gerenciamento de Cidades · Brazil

This applied, exploratory-experimental study designed and implemented a rainwater harvesting and irrigation automation system for food plant beds at a community garden ("Horta das Flores") under an impermeable roof in the eastern region of São Paulo, Brazil, aiming to reduce dependence on manual irrigation by volunteers. Developed through literature and technical review, field measurements, hydraulic efficiency tests, and component adjustments, the system was found to be technically and operationally feasible, ensuring regular water supply while reducing manual effort, and field evaluation enabled further hydraulic improvements and automation adjustments.

Yun Wu · Architecture Engineering and Science · China

Set against the backdrop of accelerating urban stock renewal in China, this paper addresses the contradiction between "quantity" and "quality" in developing high plot ratio land—where rigid plot ratio constraints create physical barriers such as insufficient lighting, chaotic circulation, and lack of public space, while demand for quality living raises requirements for spatial openness, ecology, and social inclusiveness. It analyzes design strategies including composite utilization of underground space, ecological compensation through rooftop gardens, and cross-plot three-dimensional corridors, combined with coordination of ownership division, full-process cost control, and policy tool innovation, to construct a comprehensive improvement mechanism of "physical optimization, ownership coordination, and economic balance," intended to provide a replicable design paradigm and decision-making reference for improving the quality and efficiency of existing land in high-density urban development.

Akhil S Anand, Hannes Pravida, Fredrik Fossan-Waage, Tormod Skorpe Skjolden, Giulia Robbiani, Younes Zahraoui, Emil Wolff Anthony, Jayaprakash Rajasekharan, Sissel Torre, Knut Asbjørn Solhaug, Sebastien Gros · Frontiers in Horticulture · Global

A paper on vertical farming — a controlled-environment agriculture system — examines its potential integration with energy markets. It states that vertical farming's economic viability is constrained by high capital and operational costs, a substantial share of which is energy expenditure, and explores how vertical farms could participate in day-ahead, balancing, and flexibility energy markets by adjusting lighting and climate-control energy use in response to market signals, potentially reducing costs and generating additional revenue. It identifies gaps in understanding of plant responses to variable lighting as a critical barrier to implementation and illustrates these integration challenges through small-scale laboratory experiments.

Rofiqoh Purnama Ria, Fitra Fadhilah Rizar, DEDIK BUDAINTA, Marlin Sefrila, Fitra Gustiar · Asian Journal of Agriculture · Indonesia

An experimental study at the Seed Technology Laboratory of Universitas Sriwijaya, Indonesia, conducted in September 2025, tested simple seed priming treatments on four commercially marketed leafy vegetable seed types used in urban farming — butterhead lettuce, red romaine lettuce, green lettuce, and napa cabbage — using a factorial completely randomized design. Seeds received one of four treatments (untreated control, 60°C warm water for 15 minutes, 60% shallot extract for 30 minutes, or 70% coconut water for 30 minutes), and germination was recorded every 6 hours over 48 hours. Warm water priming reduced the time to 50% germination (T50) from 36.69 hours in the control to 18.48 hours, and shallot extract reduced it to 19.38 hours, indicating faster germination; the authors note this still requires validation under nursery or field conditions.

Muhammad Prakarsa Al Qadr Saleh, Djibran Dirgantara, Adhita Arif Setyawan · Dinasti Information and Technology · Indonesia

A study for the "Buruan SAE" (Healthy, Natural, Economical) urban farming program in Maleer, Bandung City, Indonesia, designed and developed a Business-to-Consumer (B2C) e-commerce website to address marketing and sales problems previously handled through word-of-mouth and manual paper-based records. Citing suboptimal market penetration, stock uncertainty for prospective buyers, and high financial-loss risk given vegetables' perishability, the project used a risk-driven Spiral model methodology, collecting data through interviews, observation, and literature study. Business process analysis identified four main problem areas: product publication, stock management, ordering and transactions, and financial recording. The study reports that a structured web-based e-commerce system can shorten the distribution chain, ensure catalog-stock synchronization, and minimize manual recording errors.

Ruyu Liu, Daniel Harwood, Ora Kemp, Alyson Rosenthal, Roger Figueroa, PhD, MPH, MSc · Public Health Nutrition · United States (New York City)

A quasi-experimental pilot study with 3-month follow-up assessed a food pantry-led, subsidized community-supported agriculture (CSA) program called Farm Share in New York City. Farm Share provided biweekly bags of about 25 pounds of fresh produce at $5 per bag; control participants were recruited from a comparable food pantry without CSA (Farm Share n=54, control n=69), predominantly Hispanic/Latino, Black or African American, foreign-born, female and with a high school education or lower. Retention at follow-up was 65.0% (Farm Share n=33, control n=47). Skin carotenoids increased by 12 points in the Farm Share group relative to control, adjusted for smoking status, age, sex and birthplace (P=0.005), but total Healthy Eating Index (HEI) declined by 6.3 points (P=0.031) and the saturated fats HEI component declined by 1.1 point (P=0.027) in the Farm Share group. Improvements in fruit and vegetable intake (P=0.25) and food security (P=0.16) were not statistically significant.

Esther Reyna Molina, María Xóchitl Astudillo Miller, Yanik I. Maldonado-Astudillo, Ricardo Salazar · Discover Sustainability · Global

A systematic review using PRISMA 2020 methodology examined social innovation and sustainable entrepreneurship practices in the agri-food sector as responses to socio-environmental resilience challenges facing small-scale rural producers and local food systems. It characterized these practices, evaluated their impacts across sustainability dimensions, and identified success factors and barriers. Studies on social innovation predominated over those on sustainable entrepreneurship, with experiences distributed across Europe, Africa, Asia, Oceania and the Americas. The initiatives analyzed included social agriculture, community gardens, inclusive agribusiness models, women's cooperatives and regenerative agroecological projects, with overall positive effects reported for social inclusion, community empowerment, market access, income diversification and improved environmental practices. Facilitating factors included cross-sector collaborative governance, local leadership and the capacity to combine heterogeneous resources; barriers included poorly adapted regulatory frameworks, dependency on external funding, and tensions between economic and socio-environmental objectives. The review concludes that hybrid practices combining social innovation and sustainable entrepreneurship contribute significantly to rural producers' socio-environmental resilience when embedded in favorable institutional environments and supported by public policy and legal frameworks.

Quinton J, Nesbitt L, Connolly JJT, Wyly E · Urban Studies · カナダ（バンクーバー・カルガリー）

Green gentrification describes how greening a neighbourhood — with parks, community gardens and the like — can draw in higher-income households and displace or exclude marginalised residents; the authors note this has rarely been tested empirically, and that the literature has focused almost exclusively on urban neighbourhoods even though the desire for green space is often cited as a reason households move to suburbs. Surveying 104 households in gentrified downtown Vancouver and suburban Calgary new-build neighbourhoods, the study finds green factors were of similar importance to non-green factors such as safety, scenic views and ambience (and, in Vancouver, proximity to entertainment and transit). Proximity to green space mattered more than overall neighbourhood greenness, and private green space mattered more in the suburbs. Greening, in other words, is not the sole driver, and green-gentrification research needs to widen its geography beyond dense city environments.

Burton M, Margerison C, Nanayakkara J, Worsley A, Booth A · BMC Nutrition · オーストラリア（全国調査＋ビクトリア州）

School gardens are an effective strategy for food literacy and for promoting healthy eating and environmental health, yet inadequate funding, time and training stop many schools implementing or properly using one. This mixed-methods study surveyed 111 Australian primary school staff online and interviewed 13 Victorian primary teachers. Ninety per cent of respondents worked at a school with a food garden, but how well it was used varied widely. Responsibility for managing and maintaining the garden fell mainly on students and classroom teachers, with some schools relying heavily on volunteers. Healthy eating and environmental sustainability were the usual focus, and gardens also taught life and social skills — but many teachers reported the garden was poorly integrated into the curriculum. Time and funding were the most commonly reported barriers, though many schools showed resilience by drawing on existing community connections and adopting cost-reducing practices. The authors conclude that targeted teacher training, leadership support, community involvement and cost-reducing strategies would help.

Birhanu MW, Negussie ZT · The Scientific World Journal · エチオピア

A PRISMA-based review synthesising peer-reviewed articles published between 2015 and 2025 on the status, challenges and opportunities of home and urban vegetable gardening in Ethiopia. It frames urban and home-based gardening as a practical response to food insecurity, malnutrition and environmental degradation in rapidly urbanising areas where the search for better opportunities has driven rising unemployment and limited access to nutritious, affordable food. The barriers it identifies — limited access to land and clean water, gendered barriers to women, limited technical knowledge, inadequate extension services and weak institutional support — all hinder production and sustainability. It further notes that widespread irrigation with untreated wastewater poses significant health and environmental risks through heavy-metal contamination and soil-transmitted infectious disease. Opportunities such as using vacant urban lots, promoting vertical gardening and supporting local seed production remain untapped; government support for urban gardening has grown recently but its implementation remains inconsistent. The review also identifies a significant geographical gap within the existing literature.

Hoque MN, Rana ML, Gilman MAA, Pramanik PK, Islam MS, Punom SA, Rahman R, Hassan J, Rahman MS, Ramasamy S, Schreinemachers P, Oliva R, Rahman MT · Environmental Monitoring and Assessment · バングラデシュ・ダッカ／ガジプール

A shotgun metagenomic study motivated by how little is known about the microbial communities and antimicrobial resistance (AMR) profiles of rooftop and surface garden soils in Bangladesh, and their potential role as reservoirs and disseminators of AMR, despite the growing expansion of urban agriculture. Twenty-seven soil samples were sequenced — 7 from Dhaka rooftop gardens, 6 from Dhaka surface gardens, 8 from Gazipur rooftop gardens and 6 from Gazipur surface gardens. The work identified 88 antibiotic resistance genes (ARGs), of which 19 (21.6%) were shared across all sites, and found significant differences in resistome composition by garden type (p = 0.04). Rooftop soils harboured more ARGs (Dhaka 50, Gazipur 48) than surface soils (Dhaka 40, Gazipur 41) and were dominated by glycopeptide resistance genes, collectively 62.43-74.07% of ARGs; rooftop soils were also enriched in efflux pumps (adeF, 45.21% of rooftop ARGs) and the ribosomal-protection oxazolidinone resistance gene O23S (62.13% in Gazipur rooftops). Surface soils instead featured more genes mediating antibiotic inactivation, such as CATA (11.64% in Dhaka surface gardens) and fosBx1 (5.94% of surface ARGs).

Agure E, Kihagi GW, Muok EMO, Sorgho R, Danquah I · Journal of Health, Population and Nutrition · ケニア・シアヤ郡

A qualitative study of a home gardening intervention in Siaya county, rural Kenya, undertaken because home gardens are promoted as a climate change adaptation strategy in sub-Saharan Africa but the lived experience of them is less documented. Between September and November 2023 the authors ran two focus group discussions with stakeholders (n = 5) and implementers (n = 8), plus 30 in-depth interviews with male (n = 5) and female (n = 25) beneficiaries, using purposive sampling and semi-structured guides; data were transcribed verbatim and analysed by inductive content analysis mapped along the proposed impact pathways. Participants articulated a good understanding of the trainings and valued them as an occasion for knowledge exchange, and the adoption of tailored garden structures, organic gardening and food preservation created feelings of fulfilment, women's empowerment and family peace. Challenges included water scarcity, ineffective pesticides and long distances between beneficiary households. Perceived benefits were increased income, cost savings and increased dietary diversity.

Florio Furno M, Tramontini M, Gaggero E, Rigoletto M, Fabbri D, Malandrino M, Calza P, Varese GC, Spina F · Applied Microbiology and Biotechnology · Europe

Polycyclic aromatic hydrocarbons (PAHs) persist in soil and resist common recovery strategies, which matters for urban agriculture because such sites are highly exposed to varied pollution sources — and because that exposure shapes how urban growing is perceived. This study examined the fungi already present in polluted soil intended for urban agriculture, aiming to build an active microbial consortium able to transform the pollutants and lower site toxicity. The mycobiota was dominated by Ascomycota; among 28 isolated taxa across 16 genera, Aspergillus, Scedosporium, Trichoderma and Fusarium were the most abundant. Isolates differed markedly, between and within species, in their ability to grow in the presence of low- and high-molecular-weight PAHs, and some produced biosurfactants. Combining this with the ability to grow on carriers, six fungi were selected for in situ soil remediation, and biostimulation was compared with bioaugmentation using strains in co-culture. The best results came from a consortium that also showed high tolerance to high-molecular-weight PAHs. Chronic ecotoxicity testing showed no effect on Eisenia fetida except under biostimulation, which produced a 44 per cent decrease in toxicity. A mix of millet and canary seeds worked as an efficient fungal carrier.

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.

Paul Emile Tchinda, Thi-Thanh-Hiên Pham · Canadian Geographies / Géographies canadiennes 70(3) · Cameroon (one large and one medium-sized city)

Urban agriculture appears in many sustainability agendas yet has been ignored in the public policies of many African countries. Combining multi-scale mapping (city and neighbourhood) with semi-structured interviews in one large and one medium-sized Cameroonian city, this study tests how well those techniques characterise urban agriculture for local decision-making. Mapping from 5-metre SPOT satellite imagery gives a general grasp of the spatial distribution of practices, but crop types, emerging entrepreneurial practices and the temporality of crops are invisible to it and surface only through field mapping and interviews. Echoing critical remote-sensing scholarship, the authors propose a methodological framework for profiling urban agriculture and argue that the choice of research method shapes our understanding of it, so it should be made with each city's specific characteristics in mind.

Md. Nur Alom Sarkar Mithun, Saifur Rahman, Md. Asifur Rahman, Md. Hasan Sabit, Joseph L. Donaldson, Shonia Sheheli · Urban Agriculture & Regional Food Systems 11(1) · Bangladesh (Mymensingh — Kewatkhali and Aqua)

A study of perceived barriers among 100 randomly selected rooftop gardeners in Kewatkhali and Aqua, Mymensingh, Bangladesh, interviewed with a structured protocol between September and November 2023 and analysed with descriptive statistics, rank order, correlation coefficients and multiple linear regression. Every participant perceived substantial barriers. The most prominent concern was the complexity of the technologies involved; neighbours' negative attitudes ranked least significant. Age, rooftop garden area, income, experience, contact with extension media and gardening knowledge were all negatively and significantly related to perceived barriers, with garden area and knowledge the strongest predictors in the regression. The authors argue that research, demonstrations, extension activity and training to build residents' skills and understanding are the way to lower those barriers.

· 農林水産省 農村振興局 農村政策部 都市農村交流課 · Japan

MAFF's compendium on noufuku renkei (agriculture-welfare linkage): its current state, policies and cases. Defines it as work that builds confidence and purpose for people with disabilities through agriculture, and documents its widening scope to older people, those in economic hardship, people experiencing social withdrawal, and offender rehabilitation. Includes farm-workforce trends, disability population and employment figures, and cases of welfare providers entering farming.

US Environmental Protection Agency (EPA) · US Environmental Protection Agency (EPA) · United States

EPA's overview page for the Renewable Fuel Standard (RFS) program, created under the 2005 Energy Policy Act and expanded by the 2007 Energy Independence and Security Act, aimed at reducing greenhouse gas emissions, expanding the domestic biofuels sector, and reducing reliance on imported petroleum.