Research & reports

Junce Zhou, Taoze Sun, Xiaohua Guo, Wei Wang, Hongna Mu · Horticulture International Journal · Global

This study introduced the concept of Edible Landscape into university campus planning and design under COVID-19 pandemic circumstances. Construction principles of healing, practicality, ecology, economy, and adaptation to local conditions were illustrated, and a construction strategy was proposed to assist teaching and research activities, alleviate negative emotions, and produce fresh fruits and vegetables. This strategy aims to offset the shortcoming of traditional ornamental-value-centered landscapes.

Nicholaus Mwageni, Gabriel Kassenga · Journal of Sustainable Development · Tanzania (Dar es Salaam City)

This study in Dar es Salaam City, Tanzania, assessed the costs and benefits associated with green space investment in residential plots. It employed in-depth interviews using structured questionnaires and document review. Results indicated that households incurred an average cost of TZS 136,579 (USD 59) for establishing home greenery. The total net monetary benefit per household was TZS 3,148,827 (USD 1,369) annually. Based on a cost-benefit analysis, the benefit was found to be 2.6 times the investment cost, suggesting that maintaining home greeneries is a cost-effective investment.

Maurice Kesonga Nsele, Jules Nkulu Mwine Fyama, Kevin Maréchal, Thomas Dogot · Agriculture · Democratic Republic of Congo (Lubumbashi)

In urban agriculture in Lubumbashi, Democratic Republic of Congo, an innovative technology package was disseminated, but ten years later, farmers' daily income was less than USD 1.25, and critical exceedances of heavy metal content standards in crops were recorded. Survey data from 202 farmers and a Logit model identified factors influencing the sustained adoption of two innovations: motor pumps and integrated soil fertility management. Socio-demographic factors were not significant for motor pump adoption, and only mutual aid moderately influenced integrated soil fertility management. Economic factors like land tenure and income diversification were significant for motor pump adoption, but no economic factors were significant for integrated soil fertility management. Institutional factors such as access to credit and association membership were significant for the sustained adoption of both innovations.

Caroline Burner, William R. Veal · Interdisciplinary Journal of Environmental and Science Education · Global

This case study evaluated The Green Thumb Project's eight-week Youth Internship Program in an urban community garden, assessing 12 participants' changes in career preparedness skills, healthy living attitudes, and content knowledge using mixed methods. Results indicated the program was effective in positively changing all interns' skills, attitudes, and knowledge. Significant positive relationships between these areas suggested that learning gains in one area contributed to gains in others, demonstrating the program's effectiveness in personal, professional, and academic growth.

Geir Wæhler Gustavsen, Helge Berglann, Elisabeth Jenssen, Signe Kårstad, Divina Gracia P. Rodriguez · International journal on food system dynamics · Norway (Oslo)

This study conducted a contingent valuation survey in Oslo, Norway, to assess citizens' attitudes and willingness to pay for non-commercial (community gardens, educational gardens) and commercial (aquaponics, vertical farming) urban agriculture. The results indicate that Oslo citizens are willing to increase their tax payments to support the further development of urban farming in the city.

Petra Schneider, Tino Fauk · · Global

A study based on a literature review and field survey conducted from 2017 to 2020 in Ecuador, Germany, Sweden, Uganda, and Vietnam, examined the role of allotment gardens (AGs) in connecting nature and people. Allotment gardens provide substantial urban ecosystem services, contribute to habitat connectivity, and significantly impact human health. Beyond food production and recreation, they offer crucial benefits for public health, wellbeing, social inclusion, the environment, and serve as cultural archives, with their intrinsic purpose being connectivity for habitats, people, ecosystem services, and circular flux management.

S.B. Jilcott Pitts, R.A. Seguin, J. Kolodinsky, E.H. Morgan, M.J. White, M. Sitaker, J.T. McGuirt, W. Wang, K.L. Hanson, A.S. Ammerman · UNC Libraries · United States

This study examined perspectives on food access among 53 low-income families with children participating in a cost-offset community-supported agriculture (CO-CSA) program across nine communities in the US states of New York, North Carolina, Washington, and Vermont. Focus groups revealed that while produce quantity was abundant and affordability was generally good, payment timing was a barrier for some, and unfamiliar foods and quick spoilage hindered acceptability. The study concluded that CO-CSA may facilitate increased access to fruits and vegetables, but perceptions of positive diet change may be limited by challenges in incorporating share pick-up into regular travel patterns and meal planning, with food waste concerns being particularly acute for families with constrained resources.

Michele Hartmann Feyh · Revista Verde de Agroecologia e Desenvolvimento Sustentável · Brazil

A community garden was implemented in Vila Buritis II, Planaltina, Brasília, Federal District, Brazil, a socially vulnerable urban area with low purchasing power. The garden transformed an idle area into a productive space, planting 27 edible species, and 30 to 40 residents regularly visit to collect food. However, the maintenance and increase of garden productivity still require technical assistance and resources.

Dongqing Wang, Leonard K. Katalambula, Andrea R Modest, Tara A. Young, Abbas Ismail, Mary Mwanyika‐Sando, Amani Tinkasimile, Dominic Mosha, Augustine Malero, Said Vuai, Wafaie Fawzi · BMJ Open · Tanzania

This study is a protocol for the Meals, Education, and Gardens for In-School Adolescents (MEGA) project, a cluster-randomized controlled trial aiming to implement and evaluate an integrated, school-based nutrition intervention package among secondary schools in the Chamwino District of Dodoma, Tanzania. Six public secondary schools will be assigned to three different arms, receiving either the full intervention, a partial intervention, or serving as controls. The intervention will be implemented for one academic year, with baseline and end-line quantitative data collected from 750 adolescents and 750 parents.

Kimihiro Hino, Takahiro Yamazaki, Akiko Iida, Kentaro Harada, Makoto Yokohari · Landscape and Urban Planning · Japan (Tokyo)

This study evaluated the contribution of five types of activities in productive urban landscapes (PULs) to physical activity among 80 Tokyo residents using accelerometers and activity diaries. Older participants frequently engaged in these activities, spending a high percentage of their total energy expenditure, with satoyama woodlands averaging approximately one-third of national weekly recommendations for older adults. Total daily energy expenditure was significantly higher on workdays (1.18 to 1.36 times non-workdays), and hourly energy expenditure in PULs was comparable to public parks.

Marília Alves dos Santos, W. D. B. S. Bonaci, L. S. FOGANHOLO · Fractal Revista de Psicologia · Brazil (São Paulo)

This report describes a supervised internship experience in Social and Community Psychology conducted in 2017 with an intergenerational community garden group at a social assistance institution in rural São Paulo state. Key observed results of this intervention among group members included the learning of various cultivation techniques, the strengthening of interpersonal relationships, the development of group autonomy and self-organization, and the group's formation as an important support network.

Meike Rombach, David Dean, Tim Baird, Jacob Kambuta · Foods · United States

This study investigated factors determining US consumer preferences for growing and processing horticultural products (fruit, vegetables, wine, beer) versus buying them, both before and after the COVID-19 pandemic. Using PLS-SEM, findings showed that engagement with horticulture pre- and post-pandemic influenced preferences for growing/processing, and this engagement was significantly impacted by attitudes towards US growers. Attitudes towards COVID-19 and human values like self-enhancement, conservation, and self-transcendence were also significant, but openness to change was not.

Ainsley C. McStay, S.L. Walser, Eric C. Sirkovich, Nicolas Perdrial, Justin B. Richardson · Journal of Environmental Quality · United States

This study evaluated portable X-ray fluorescence (pXRF) measurements of macronutrients, micronutrients, and toxic elements (As, Pb) in soils and plants from 10 urban community gardens across the eastern United States. It found that pXRF and traditional methods provided agreeable estimates for some elements (Mn, Cu, Zn, Pb) but not for macronutrients (Ca, K, P). While pXRF is an accurate tool for screening Mn, Cu, Zn, and Pb, macronutrients were poorly estimated in fruits, leaves, and roots, and genus-specific and garden-specific factors may be important for plant uptake models.

Theodore Ngoufo Sogang, Youssouf Monkouop · Journal of Agricultural Chemistry and Environment · Cameroon

This article proposes a framework for understanding the past, present, and future of urban agriculture in Cameroon, focusing on the period from 1993 to 2017. It examines the subject through five fundamental notions: International Relations and Geopolitical Agriculture, Urban Economic Agriculture, Environmental and Food Climate Stakes, and Science and Culture adapted to agricultural and food mutations. The study aims to provide a comparative review of agriculture in transition by integrating historical, social, economic, and diplomatic perspectives.

Gopika Somanath Prathiksha I. · Zenodo (CERN European Organization for Nuclear Research) · Global

This paper discusses microgreens as an innovation in vegetable growing, which have gained popularity since their introduction to Californian restaurants in the 1980s. Microgreens are presented as a potential solution for malnutrition and food security, providing nutrient-rich and high-quality phytochemicals. Interest is rising due to their nutraceutical, fresh, and functional food properties, and their abundance of phyto-constituents and minerals.

Universidad de Guadalajara, Ofelia Barrios Vargas, María Lourdes Rebolledo García, Adán Rubio Cuevas · GESPYE Gestión Pública y Empresarial · Mexico

This study diagnosed urban gardens in Lázaro Cárdenas de Ocampo, Michoacán, Mexico, identifying private and community gardens and a 20% increase in gardens in 2020 compared to the previous year. A cross-sectional study with on-site interviews, recordings, and photographs was conducted. The findings suggest that urban gardens served as occupational therapy and family integration during COVID-19 confinement, demonstrating promising resilience in the population.

Tiong Ann Goh, Sorain J. Ramchunder, Alan D. Ziegler · CABI Agriculture and Bioscience · Global

Researchers assessed pseudo-total concentrations of cadmium, copper, lead and zinc in soils from community gardens, public parks and woodlands across Singapore, comparing them to risk guidelines and using lead isotope analysis to trace contamination sources. All measured concentrations were below thresholds considered to represent substantial risk, garden soils were largely equivalent in concentration to parks and woodlands though geographic distribution varied, lead sources were both anthropogenic and natural with spatial variability inconsistent with a single point source, and a correlation between copper and zinc suggested a shared source such as road traffic or atmospheric deposition; the study did not assess bioavailability or bioaccessibility of these elements, which it noted would be needed for a fuller risk assessment at sites with higher contamination.

Naomi Shimpo · Toshi keikaku hokokushu/Toshi keikaku houkokushuu · Japan

This case study reports how Toyama City, Japan, launched a municipally led community garden program using neighborhood block parks (gaiku koen), the smallest category of urban park in Japan. Growing and harvesting vegetables and fruit in urban parks had generally been regarded as inappropriate on public-interest grounds, but the city persuaded the responsible ministry that community gardens benefit urban residents, particularly older adults, and meet existing needs of these parks. As a result, management of the community gardens was transferred, through official procedures, to resident-run park stewardship associations (koen aigokai).

Marek Hekrle · Wiley Interdisciplinary Reviews Water · Global

A systematic review of 153 scientific publications examined data collection techniques and well-being perspectives used to elicit preferences toward multiple ecosystem services (ES) provided by nature-based solutions (NBS). Ecosystem services from urban parks, urban trees and community gardens were the most commonly examined, with questionnaire surveys the dominant data collection technique followed by semi-structured interviews and workshops, while only a limited number of studies used revealed- or stated-preference methods such as choice experiments or contingent valuation; the review defines three distinct well-being perspectives — individual, community and society — that it finds are rarely discussed explicitly in existing NBS literature.

Michel Shengo Lutandula⃰, Fabien Ilunga Mpanga · The Global Environmental Engineers · Democratic Republic of Congo (or Africa)

In Katuba municipality, Lubumbashi, Democratic Republic of Congo, irrigation water, soil, and harvested amaranth from an area of urban amaranth cultivation were analyzed for chemical and microbiological pollutants. Water and amaranth were polluted on both mineral and microbial fronts, while soil was not; water samples contained Paramecia, Entamoeba histolytica eggs, fecal contamination indicator germs, mesophilic flora, and pathogens including Aeromonas hydrophila and Pseudomonas aeruginosa. Amaranth cobalt concentrations exceeded quality standards and the plants were contaminated with Paramecia, Entamoeba histolytica eggs, Escherichia coli, and Klebsiella planticola, leading to the conclusion that consuming these amaranths poses health risks to the population.

Nirosha Ruwani Amarasekara, Abdullah Ibn Mafiz, Xun Qian, James M. Tiedje, Weilong Hao, Yifan Zhang · Journal of Agriculture and Food Research · Global

Metagenomic analysis of total soil DNA from urban vegetable garden soils examined the co-occurrence of antibiotic resistance genes (ARGs) with resistance genes to other compounds, including heavy metals and biocides. Relative abundance was 2.00-2.90 x 10^-1 copies per 16S rRNA gene for ARGs and 4.22-6.00 x 10^-2 for metal resistance genes (MRGs), with the most abundant ARGs conferring multidrug, vancomycin, bacitracin, fosmidomycin, and macrolide-lincosamide-streptogramin (MLS) resistance, alongside MRGs for copper, arsenic, multiple metals, iron, and chromium, biocide resistance genes (BRGs) for multi-biocide, peroxide, and phenolic compounds, and multi-compound resistance genes (MCRGs) combining biocide-metal, drug-biocide-metal, and drug-biocide resistance. Multidrug resistance genes (including mexF, mexW), the MLS gene macB, and the MCRG ruvB showed the strongest correlations with other resistance genes, demonstrating extensive co-occurrence of ARGs, MRGs, BRGs, and MCRGs in urban agricultural environments and suggesting that soil contaminants have potential as co-selection agents for antibiotic resistance.

Jin-Hee Ju, Yong-Han Yoon, So-Hui Shin, Se-Young Ju, Kyung‐Jin Yeum · Horticulturae · Global

A review covers up-to-date information on the mechanisms producing bioactive compounds in plant foods grown through urban agriculture and the main factors influencing their levels, organized into four categories: ground-based uncontrolled agriculture, ground-based controlled agriculture, and building-integrated uncontrolled and controlled agriculture. In ground-based urban agriculture, applying short-term abiotic or biotic stress through agronomic management practices was shown to significantly affect bioactive compound levels in fruits and vegetables, while in building-integrated urban agriculture, artificial lighting, cultivation medium, and water use efficiency were identified as factors of interest for improving the level and composition of functional plant components.

Peter Sanjo Adewale, Sunday Clement Olubunmi Makinde, V. Kusemiju, Olawole O. Obembe · Journal of sustainability and environmental management · Nigeria

This study measured and compared lead (Pb), cadmium (Cd) and manganese (Mn) concentrations in soil and leafy vegetables (Amaranthus hybridus, Celosia argentea, Corchorus olitorius) using atomic absorption spectrophotometry at Urban Expressway Farms (UEF) and Peri-urban Road Farms (PRF) in Lagos State, Nigeria. It found the highest Pb concentration (0.93+/-0.06) in Celosia argentea at UEF, and the highest Cd (0.51+/-0.11) and Mn (0.98+/-0.02) concentrations in Amaranthus hybridus at UEF, with Pb in Celosia argentea 5 m from the expressway and Cd in Amaranthus hybridus 10 m from the expressway exceeding WHO/FAO permissible levels; heavy metal residue levels were driven more by farm location than by vegetable type, and the study calls for regular monitoring to prevent consumption of contaminated leafy vegetables and recommends farmers cultivate fields farther from expressways.

F. Becot, K.L. Hanson, R.A. Seguin, A.S. Ammerman, J. Kolodinsky, J.T. McGuirt, S.B. Jilcott Pitts, M. Demarco · Carolina Digital Repository (University of North Carolina at Chapel Hill) · United States

A modified exploratory choice experiment, embedded within in-depth interviews, examined willingness to participate in a Community Supported Agriculture (CSA) program under varying price, frequency, food quantity, and accessibility conditions among 42 low-income adults with at least one child in the household in North Carolina, New York, Vermont, and Washington. Comparing summed willingness across conditions, the analysis suggests the ideal CSA would be a full-sized share of eight to nine mixed items, distributed every other week, priced under US$15, no more than 10 minutes farther than the supermarket from home, and preferably cheaper than but no more than 20% pricier than supermarket prices.

Irina PANȚIRU, Erzsébet Buta, Dănuţ Maniutiu, Alexandru I. APAHIDEAN, N. Sima, Alex Dregan, Rodica Sima · Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Horticulture · Global

A 2022 literature review assessed the overall role and benefits of urban allotments and home gardens for urban green infrastructure (GI) in Global North countries, drawing on published evidence from 2000 onward and using narrative synthesis to interpret the research on domestic gardens and identify areas needing further study. The review found key differences in both the nature and management of urban domestic gardens with major implications for their contribution to GI sustainability, alongside heterogeneous social, cultural, ecological and economic contexts shaping that impact. It also noted that domestic gardens act as a source of food security and provide additional ecosystem services. The review concludes that home and allotment gardens are important contributors to urban GI sustainability and should be incorporated into the planning, design and management of urban infrastructure.