Research & reports

Christian Kofi Sarpong, Romanus Dogkubong Dinye, Alex Donbeinaa, Vera Nyarko Amoako · Asian Journal of Agricultural and Horticultural Research · Ghana

This study assessed the role of urban agriculture in Ghanaian cities through a systematic literature review of publications from 2000 to 2024. Urban agriculture was found to significantly contribute to food security, nutrition, and income, and to bolster environmental sustainability. However, challenges such as land tenure insecurity, unsafe irrigation practices, weak institutional support, and limited policy integration persist.

Susanne Berliner · · Global

This narration observes a community garden as a space of social diversity, functioning as a "cosmopolitan canopy" where people from different backgrounds interact. While a cosmopolitan spirit exists, the garden is not neutral; its permeable boundaries and internal segregation indicate it is permeated by power dynamics and control.

Chivers, Ruth, Laing, Olivia 1977-, British Library · · Global

Ten award-winning designers present original garden designs for public and private spaces, extending up to 50 years into the future. These designs aim to mitigate the effects of climate change, encourage biodiversity, and address issues of legacy, land ownership, changing societal needs, and individual well-being. The paper emphasizes the power of gardening to nurture nature and adapt to change.

Mohammed Abdulai, Mohammed Tanko, Alhassan Andani · World Development Sustainability · Burkina Faso (Ouagadougou)

This study empirically investigated the link between municipal wastewater (MWW) use and vegetable productivity among 416 vegetable farmers in Ouagadougou, Burkina Faso, using survey data. It was found that MWW use alone is associated with a higher value of vegetable output, but regulation through contacts with extension agents reduces the agronomic and economic benefits of using MWW for irrigation.

Galia Oriya Cukierman, Demi Coenraads, Emmy Iwarsson, Tong Wu, Alon Shepon · npj Urban Sustainability · Global

This systematic review analyzed 363 community garden (CG) articles from 1992 to 2021, identified through a bibliometric analysis of 1534 urban agriculture (UA) and 470 CG studies. Findings indicate that UA research primarily focuses on food production, while CG studies emphasize social and urban dynamics, mainly in the Global North, with limited quantitative evidence of their impacts. The review concludes that CGs contribute to all SDGs, but their roles in urban resilience, food systems, and policymaking are underexplored, and their overall contribution to sustainability remains unclear due to the lack of a global estimate.

Abdul Rahim Mohammed Sabtiu, Isaac Amankona Hinne, Isaac Kwame Sraku, Daniel Kodjo Halou, Richard Tettey Doe, Simon K. Attah, Fred Aboagye‐Antwi, Yaw A. Afrane · Malaria Journal · Ghana (Accra)

A study in Accra, Ghana, investigated mosquito larval habitats and their impact on Anopheles gambiae s.l. larvae density, conducting surveys at 15 locations during 2022's dry and rainy seasons. Of 727 potential habitats, 65.34% were positive for Anopheles larvae, with drainage ditches being the most common type. Irrigated urban farming sites showed the highest abundance of An. gambiae s.l. larvae, particularly during the rainy season, indicating that urban farming contributes to increased mosquito breeding habitats.

Blessing Nyamasoka‐Magonziwa, Esther Simango, Hatirarami Nezomba · Frontiers in Agronomy · Zimbabwe (Chitungwiza)

This study evaluated climate-smart crop production practices by urban farmers in Chitungwiza District, Zimbabwe, and their effects on household diets. Mixed methods research, including focus group discussions with four farmer groups and interviews with 107 households in 2022, classified only 23% of farmers as climate-smart. While climate-smart crop production positively influenced household diets, with climate-smart households having a significantly higher Household Dietary Diversity Score (3.3 vs. 2.9; p=0.02), there were no significant differences in maize yield between climate-smart and non-climate-smart farmers (2.10 t/ha vs. 2.27 t/ha, respectively, in the 2020/2021 season).

Xiulan Xie, Yaohua Zhai, Hao Cheng, Wenhua Wei, Maozhi Ren · Plant Physiology and Biochemistry · Global

This review examines sustainable production of paclitaxel, an anti-cancer compound derived from Taxus (yew) trees, in the context of urban agriculture. It notes that traditional extraction methods from Taxus are inefficient and destructive, risking extinction of the genus, and surveys research on biotechnological approaches to efficient, cost-effective paclitaxel biosynthesis. The review discusses strategies for industrial-scale production based on Taxus cell culture methods.

Álvaro Luis José Reyes Córdova · Horizontes Amazónicos · Ecuador

A bibliographic review of research on water quality in the Puyo River and its tributaries in Pastaza, Ecuador, compiled studies from scientific databases and institutional repositories reporting physicochemical, microbiological, and heavy metal parameters. The main sources of contamination were found to be wastewater discharges, fecal coliforms, and accumulation of heavy metals such as lead and mercury linked to urban, agricultural, and mining activities, with community perception aligning with technical findings as most of the population rated the water poor quality and associated it with health problems. Over the past twenty years, a progressive deterioration in water quality parameters has been documented, with increases in turbidity and pathogenic microorganisms despite some isolated recovery efforts, and the review concludes that lack of attention from the municipality and prefecture, together with the absence of continuous monitoring, is worsening the water crisis and demands comprehensive, participatory governance.

Zulma Lopez Reyes, Dalia Alshahrani, Jovana Čvorović, Mary May, Maged M. Saad · Frontiers for Young Minds · Global

An educational article on Sustainable Development Goal 2 (Zero Hunger) describing how soil microbes act as natural fertilizers that improve soil quality and protect plants. The authors are researching how to use microbes to help plants grow in warmer climates, testing this work in school gardens where students learn about healthy soils and growing nutritious food using new technologies.

Mohamed Lamine Dramé, Abdoulaye DIAWARA, Hamadoun GARBA, Bonkana MAIGA, Hamadoun SYLLA, Yacin Guirre OSMAN, Ntcughunene Rokissi Ondombe, Soumaila DIARRA, Bakary DIARRA, Akory Ag Iknane, Fatou Diawara · Asian Food Science Journal · Mali

A study analyzed food security, dietary diversity and their socio-demographic determinants among households in Bamako, Mali, between 2018 and 2022. Using National Food Security and Nutrition Survey (ENSAN) data on 5,792 households, it applied descriptive statistics, bivariate analysis and multivariable logistic regression, with Household Dietary Diversity Scores (HDDS), Food Consumption Scores (FCS) and wealth quintiles as primary predictors. Household diets were cereal-based (99.3%) and largely lacking protein-rich foods such as eggs (20.1%) and legumes (36.7%). The prevalence of food security fell significantly, from 64.5% in 2018 to 59.2% in 2022 (p<0.01). Urban residence and higher education were strong positive predictors of food security (AOR 1.8, 95% CI 1.4-2.3, and AOR 2.1, CI 1.7-2.6, respectively), while households in the lowest wealth quintile (AOR 0.4, CI 0.3-0.6) and polygamous households (AOR 0.7, CI 0.5-0.9) showed significantly lower food security. The study concludes that Bamako's food insecurity stemmed from economic instability and educational disparities despite a degree of dietary diversity.

Márliton Santos, Martele Brito Santos, Josilene Martins Inez · REVISTA PONTO DE VISTA · Global

A systematic review following the PRISMA protocol, covering articles published between 2014 and 2024 in the CAPES and SciELO databases, analyzed the effect of school-based urban agriculture projects on students' emotional health. The review found that participation in school gardens was associated with a significant reduction in stress and anxiety levels and promoted the development of social skills. Pedagogical practices linked to urban agriculture were reported to foster a collaborative environment and improve emotional well-being, and the presence of green areas in schools was also found beneficial for academic performance and mental health.

Anna Stage (17743305), Marie Caroline Vermund (11075551), Mads Bølling (6661577), Camilla Roed Otte (21175813), Alberte Laura Oest Müllertz (21175816), Peter Bentsen (3527732), Glen Nielsen (10468844), Peter Elsborg (8894495) · Figshare · Denmark

A study protocol describes FoodACT, a multimethod, quasi-experimental investigation of the existing Danish school garden program Gardens to Bellies (GtB) and its effects on children's food literacy (FL), climate change literacy (CCL), school motivation (SM) and physical activity (PA), preregistered on ClinicalTrials.gov (#NCT05839080). The study covers six GtB locations across Region Zealand and Region of Southern Denmark, recruiting approximately 1,600 fourth-grade GtB pupils as the intervention group and approximately 1,600 fourth-grade pupils from non-GtB schools as controls. Pupils grow, prepare and cook food across eight garden sessions; FL, CCL and SM are measured via pre- and post-intervention surveys, PA via accelerometry, and acute SM via text-message surveys, alongside semi-structured and focus-group interviews with garden facilitators and pupils on implementation and mechanisms.

Md. Maruf Billah, Al Muzahid, Md. Nasrul Millat, Mohammad Mahmudur Rahman‬ · Journal of Environmental Science Health & Sustainability · Bangladesh

A structured face-to-face survey of 200 randomly selected residents in Bangladesh, conducted in 2024 and analyzed with SPSS version 29, examined perceptions of urban agriculture. 34.5% of respondents fell into the early-adopter category; rooftop gardening was the most widely adopted practice (93.5%), followed by homestead gardens (80%) and container gardens (66.5%). 94.5% perceived urban agriculture as contributing medium to high to environmental sustainability, and 92.5% saw reduced cost of living as its main benefit. Innovativeness, training exposure, extension access, media contact, education, group membership and market access were identified as adoption factors, while 89% of respondents reported facing medium to high constraints to adoption.

Christopher Tate, Shariq Mumtaz Hashmi, Niamh O’Kane, Ruth F. Hunter · Cities · Global

This systematic review searched four bibliographic databases and identified eleven studies on horticultural therapy (HT) interventions drawing on urban agriculture practices for people with pre-existing diagnoses of depression, anxiety, or acute stress disorder. Six studies reported improvements in depressive symptoms, three found HT mitigated stress, and two reported a positive influence on anxiety, but more than two-thirds of the included studies carried moderate (n=6) or high (n=2) risk of bias with substantial methodological heterogeneity, and the small number of studies limits the generalisability of the findings; the review concludes that further research is needed to establish a robust causal link between HT interventions and improved mental health outcomes in this population.

Mysha Clarke · EDIS · Global

This extension publication outlines the potential benefits of urban gardens for nearby neighborhoods, the broader urban community, peripheral communities, and visitors to a city, aimed at urban planners, residents, and community members planning new gardens or maintaining existing ones. It presents guidance rather than original study data or measured outcomes.

Wen‐Pei Sung, Ming-Cheng Liao, Hsian-Ling Peng, Chung-Tien Huang, Yun-Jung Chuang, J Wang · Sustainability · Global

Against a backdrop of intensifying urban heat island effects and residents' mental health problems amid urbanization, this study examined the impact of an Urban Food Forest Program on urban environmental comfort, heat island mitigation, and the mental health of middle-aged and elderly residents. Using on-site field measurements and questionnaire surveys, it analyzed the environmental comfort of green spaces in urban heat island hotspots and assessed participants' mental health. The Urban Food Forest Program significantly reduced surrounding environmental temperature, with an average cooling effect of 2.4°C particularly in soil areas, and reduced heat island intensity in the surrounding area by 15%. In the mental health survey, male participants scored significantly higher than female participants (p = 0.017), and middle-aged and elderly participants who took part more than five times per week scored 17% higher, significantly better, than low-frequency participants. The study notes that its relatively small sample size and limited observation period may affect the generalizability of its findings, and that it focused on one specific urban area that may not represent the broader urban context.

B Sreejith, B Maneesh · South Asian Journal of Agricultural Sciences · Global

Set against challenges to social equity, ecological balance, and global food availability from population growth and rapid urbanization, this review paper surveys existing literature linking urban agriculture to multiple Sustainable Development Goals — including poverty eradication, ending hunger, health and well-being, gender equality, economic growth and employment, inclusive urban development, sustainable consumption and production, climate action, land ecosystems, and global partnerships — and discusses policy implications for India. It compiles prior findings associating urban agriculture with locally grown food supply, resource optimization and emissions reduction through urban forestry, rooftop gardens and vertical farming, reduced food miles, and education, skill-building and community participation opportunities including for women and youth. The paper presents no original empirical data of its own.

Pierre‐Alexandre Deyris, Franck Pélissier, Claire M. Grison, Claude Grison · Journal of Hazardous Materials Advances · Global

Herbicide use worldwide has doubled over the past 30 years, and diuron contamination of tropical aquatic ecosystems — affecting food crops such as pineapple — has been reported across Southeast Asia, the Pacific, and Africa. This perspective article examines taro (Colocasia esculenta), a widely cultivated crop whose tubers are consumed locally, as a nature-based means of mitigating diuron impact on tropical aquatic ecosystems through rhizofiltration, i.e., phytoaccumulation of the herbicide by the roots. Analysis of treated tubers found that diuron levels in the tuber core were below recommended European standards, indicating the tubers could remain edible for the local population and confirming compatibility with existing food uses.

Gaynell M. Simpson, Wendy Lustbader · Innovation in Aging · Global

This symposium overview highlights cultural assets long relied upon by African American and Latina communities, focused on the formal and informal mutual aid of grandparent caregivers, which it describes as often overlooked or underutilized despite being a vital source of support. It states that historically, underserved grandparents have drawn on mutual aid practices such as neighbors relying on one another, sharing produce from community gardens, exchanging skills and abilities, and standing together with extended families when other societal resources were inaccessible. Four presenters address these themes: Carole Cox presents a virtual empowerment program on skill building, social connection, and empowerment; Nancy Mendoza offers recommendations on how the cultural assets of Latino grandparent caregivers can support their caregiving; Tina Peterson examines mutual aid among African American grandmothers raising grandchildren and how support networks compensate for gaps in formal and informal services; and Gaynell Simpson addresses the need for intergenerational programs and macro-level advocacy to address structural inequalities affecting grandparent caregivers and their families.

Zahara Abdul Manaf, Louise Tee, Nurul Mirza Mohamad Shah, Siti Hajar Mohammad, Abdul Arieffarid Abdul Wahid · Journal of Health Population and Nutrition · Malaysia

This quasi-experimental study involved 72 ten-year-old children at a primary school in the Klang Valley, Malaysia, recruited by convenience sampling. The intervention group received a two-month program combining a talk on fruits and vegetables, educational gardening, cooking activities, and an educational board game, while the control group received only a dietitian's talk on fruits and vegetables. Height and weight were measured to calculate BMI, and changes in knowledge, attitudes, and practices around fruit and vegetable consumption were measured with a self-administered structured questionnaire. Knowledge and awareness improved significantly among girls in the intervention group (p = 0.010) but not among boys (p = 0.272), and knowledge improved significantly among overweight and obese participants (p = 0.033) but not among those with normal or underweight BMI (p = 0.215). Attitude (p = 0.980) and practice (p = 0.233) toward fruit and vegetable consumption showed no statistically significant improvement after the intervention.

Jan Grossarth · Discover Cities · Global

This paper critically examines the dominance of quantification—certification scores, KPIs, life-cycle assessment—in sustainability practice for cities and buildings (including urban agriculture), arguing that data-driven metrics strip out the emotional and narrative meaning of sustainability. The authors label the shift from a culturally rich orientation to a purely technical, quantitative practice a "tragedy of sustainability," and argue that narrative-focused interviews and real-life storytelling in architecture and urban planning should not just accompany KPIs and ratings but be prioritized over them. The paper is a conceptual argument, not an empirical study with data or case findings.

Jennifer Newell, Siobhan Cox, Rory Doherty · Urban Agriculture & Regional Food Systems · Global

A systematic review synthesized literature on the oral bioaccessible fraction (BAF) of arsenic, cadmium, chromium, nickel, and lead in vegetables grown on contaminated soils, drawing values from multiple online databases across potentially toxic elements (PTEs), in vitro test methods, and vegetable types. The review starts from the premise that many urban and peri-urban brownfield sites carry a legacy of soil metal and metalloid contamination, so crops grown there may pose human health risks. Median PTE BAFs ranked Cd > Ni > Cr > As > Pb; among in vitro methods, the unified BARGE method (UBM) produced the highest median BAFs (63.0% gastric, 59.6% gastrointestinal); and by crop type, BAFs ranked non-vegetables (e.g., rice, fungi) > legumes > root vegetables > bulb vegetables > leafy vegetables.

Kelley AT, Boger R · EcoHealth · 米国・ニューヨーク市ブルックリン

A survey of mosquito larval abundance and genera across 22 community gardens in Brooklyn, New York. The authors frame these gardens as social spaces providing food sovereignty to many New Yorkers, while the arrival of Aedes albopictus and the longtime presence of Culex pipiens make socialising in them more dangerous — Ae. albopictus is associated with dengue, Zika and chikungunya, and Cx. pipiens is a longstanding West Nile virus vector. Because both breed in human-made plastic containers, knowing their preferred container types and locations can inform gardeners' best management practices. Non-purposeful container types and lower total volumes of water were significant predictors of higher mosquito densities, though these variables did not predict egg-laying preference.

Otoadese D, Kamara I, Onyango E · International Journal of Environmental Research and Public Health · カナダ・アルバータ州

Community gardens are increasingly popular in Canadian cities and can be transformative spaces where immigrants develop self-reliant strategies for accessing culturally familiar, healthy food — yet many facilitators and barriers limit the engagement of racialized groups such as Black-identifying immigrants. Using a socio-ecological framework and a community-based participatory research approach, this mixed-methods study combined structured surveys (n = 119), in-depth interviews (n = 10) and two Afrocentric sharing circles, with participants recruited through African immigrant-serving community organisations in Alberta. Barriers at several levels of the socio-ecological model interacted to shape interest and engagement, while access to collective gardens was associated with significant benefits: maintaining healthy foodways, knowledge exchange, growing social capital, and community connections supporting overall wellbeing. The authors offer an accessible framework for addressing these barriers and for making urban agriculture initiatives more inclusive and culturally responsive.