Research & reports

Dwi Iriyani, Pangesti Nugrahani · Universitas Terbuka Repository (Universitas Terbuka) · Indonesia (Surabaya)

This study aimed to compare the vitamin C content of spinach, water spinach, and mustard greens produced by urban agriculture in three areas of Surabaya, Indonesia. Vitamin C analysis was performed using the DCPIP titration method. The results showed no significant difference in vitamin C content among the three types of vegetables, but differences in planting locations caused variations in vitamin C content.

Dan Luo, Haifeng Zheng, Ye Chen, Philippe Deleporte, Tianpeng Xie, Siobhán Staunton, G. Wang · Soil Use and Management · China (Fujian Province)

A large-scale survey across 515 sites and 24 crop species in Fujian Province, SE China, assessed nickel (Ni) accumulation in food crops and associated dietary health risks. Crop Ni content was influenced by both soil Ni (DTPA-extractible) and plant species, though PCA did not show strong correlations between soil-to-crop transfer factors and soil properties. The study concluded that dietary intake of foods with mean Ni content could lead to health risks, particularly for children, and that sandy soils rich in organic matter with high Ni content are unsuitable for growing rice and legumes.

Nur Faizah Marwan, Bagas Setiono, Nur Indah · Jurnal Ilmiah Penalaran dan Penelitian Mahasiswa · Indonesia

Code Village in Indonesia faces severe river pollution, with heavy metal levels at 6-9 mg/l, exceeding the 3 mg/l standard. This paper proposes the "ECOBLUE" concept, which combines Blue Open Space (BOS) optimization with urban farming, prioritizing waste management to improve living standards. The concept involves managing organic waste for fertilizer and recycling plastic for vertical gardens, aiming to enhance health, education, and prosperity in Code Village.

Fika Mayrlina Anggrayni, Dini Ririn Andrias, Merryana Adriani · Media Gizi Indonesia · Indonesia (Surabaya)

This observational study, conducted in Surabaya, Indonesia, analyzed differences in food security and coping strategies between agriculture and fisheries urban farming households. Among 62 households, 64.7% of the agriculture group were food secured, while 75% of the fishery group were food insecure with severe hunger. There was no statistical difference in household food security between the agriculture and fisheries urban farming groups (p=0.255). However, a difference in coping strategy was found (p=0.021), with agriculture urban farming households being more food secure and rarely employing coping strategies compared to fishery urban farming households.

Yonghong Hu, Gilles Vincent, Xiao‐Ya Chen · Annals of the Missouri Botanical Garden · China (Shanghai)

This case study examines the role of Shanghai Chenshan Botanical Garden in Shanghai's sustainable development over six years. The garden collaborates with local government on the "City Green Master Plan," supports urban horticulture and phytoremediation, and conserves 14 critically endangered plant species in East China. It also develops new plant varieties for functional food and educates the public on plant conservation.

Cho-Hee 성초희Sung, Yeun-Sook 이연숙Lee · 한국실내디자인학회 학술발표대회 논문집 · South Korea (Seoul)

This study analyzed the characteristics of communal spaces in supportive housing for vulnerable elderly, focusing on their role in health promotion. Using the first supportive housing in Seoul, South Korea, as a case, 18 communal spaces, including a rooftop garden, were classified into five purpose types. The research found that communal spaces are largely related to social health, indicating a strong correlation between communal spaces and a sense of coherence for achieving salutogenesis.

강현경, 백승준 · · South Korea

This study conducted in South Korea investigated the effect of an urban agriculture experience program on the mental health of seniors over 65 years old. The experiment group, who participated in the program for over six months, showed statistically significantly lower stress scores related to loneliness and lower health-related stress levels compared to the control group, while the control group exhibited significantly higher depression levels. Urban agriculture activities were shown to stabilize sympathetic nerves and activate parasympathetic nerves in the elderly, increasing resistance against stress.

Eka Rastiyanto Amrullah, Ani Pullaila, Akira Ishida, Haruka Yamashita · Asian Social Science · Indonesia (Banten)

In Banten, Indonesia, the effects of the Sustainable Home-Yard Food Garden (KRPL) program on participants' household income were evaluated. The program was shown to contribute to dietary diversification through the harvest of various fresh vegetables and resulted in reduced expenditure on fresh vegetables and/or increased household income. OLS regression results indicated that participants with more pots and/or more vegetable varieties tended to enjoy gardening, were not passively motivated, grew vegetables for sale, and resided in the more developed northern part of Banten.

강미영, 김영희, 김용현, 진종현, 이민희, 허무룡 · · South Korea

This study conducted in South Korea investigated the influence of urban farming activities on changes in eco-friendly diets. Urban farming participants were often office workers living in apartments with 4-person families, and tended to have over 10 years of rural experience in childhood. They participated in activities for 1-2 hours on weekend mornings once a week for over 3 years. Eco-friendly food education influenced crop yields, and difficulties with weed removal and the need for eco-friendly farming education were noted. Participants reported satisfaction with the type and quality of harvests, changes in diet, reduced food costs, and health benefits.

Jyothsna Latha Belliappa, Alison Byrnes, Prayas Abhinav · · India

The City Spinning project, an urban horticulture and community networking experiment in two Indian cities, demonstrated a low-cost, resource-light model that separates consumption from ownership, aligning with sustainable Product-Service Systems. This project aimed to support urban poor children's nutritional needs and foster social equity by enabling interaction with community members. It also highlighted the importance of safe play spaces for children's development of citizenship competencies, which are often limited to confined playgrounds in most Indian cities.

강미영, 김영희, 김용현, 진종현, 이민희, 허무룡 · · South Korea

A South Korean study aimed at raising awareness of environmental importance through eco-friendly urban agriculture and promoting the effective establishment of urban agriculture. It found that, through urban agricultural activities, urban residents received education in eco-friendly farming methods and applied them in plot preparation, crop cultivation, and harvesting. Participants also regarded the seeds and seedlings used in urban agriculture as eco-friendly, and reported that the activities helped change their perceptions of the environment; they stated that this heightened awareness of environmental importance also influenced behavioural change, that they could introduce their urban agricultural activities to neighbours as eco-friendly, and that they intended to continue participating in urban agricultural activities.

정나라, 정명일, 한승원, 김재순 · · South Korea

A resident survey in South Korea was conducted to provide basic data for building a community garden as part of a village-making project. Respondents who said they would use the garden more than once a week made up a high share, with usage frequency rising with respondent age; afternoon use on both weekdays and weekends showed high intended participation, and the garden's efficiency was found to increase when it was located within about a 20-minute walk (roughly 1 km); the study concludes that garden design should reflect each community's characteristics rather than applying a uniform layout.

한국교원대학교, Dong-Kuk Hwang · Journal of Korean Practical Arts Education · South Korea

A meta-analysis of research papers published in Korea between 2001 and September 2017 examined the educational effectiveness of school gardens. Papers were identified by cross-searching the keywords "garden," "school," "elementary," and "early childhood," yielding 25 papers and 49 calculated effect sizes. Dependent variables were character development, dietary habit improvement, intellectual ability improvement, and environmental literacy, with study subject, number of participants, garden type, and instructional hours used as moderator variables. School garden education showed a large overall effect size, with character development showing the largest effect size among the dependent variables. Effects were largest when targeting early childhood subjects, groups of 15 or fewer, box-type gardens, and 10-15 instructional sessions. A publication bias test found some bias present, but the educational effect of school gardens remained large even after accounting for it.

Dwi Iriyani, Pangesti Nugrahani · Jurnal Matematika Sains Dan Teknologi · Indonesia

This descriptive quantitative study compared the nutritional values of organically and non-organically grown leaf vegetables—water spinach (kangkung), mustard greens, and spinach—cultivated in urban agriculture in Surabaya, Indonesia. Using spectrophotometric measurement (at 480, 645, and 663 nm) for total chlorophyll and carotenoid content and DCPIP titration for vitamin C, the study found water content above 80% in all samples, the highest vitamin C in non-organic mustard greens (2.45 µg/g) and the lowest in organic spinach (0.68 µg/g), the highest chlorophyll in non-organic spinach (23.81 mg/L) and the lowest in non-organic kangkung (3.29 mg/L), and the highest carotene in non-organic spinach (263.52 μmol/L) and the lowest in non-organic mustard greens (168.02 μmol/L)—concluding that no single leaf vegetable type, organic or non-organic, had the best values across all nutritional measures.

· Agronomy for Sustainable Development · China (Zhejiang)

A study evaluating leafy vegetable production on rooftops in Zhejiang, China. It reports that rooftop-grown greens can be profitable and less contaminated than conventionally farm-grown vegetables.

· Quality of Life Research · Taiwan

A study in southern Taiwan testing horticulture therapy on nursing home older adults' activities of daily living, happiness, meaning of life, and interpersonal intimacy, with the intervention group receiving weekly one-hour sessions for eight weeks and showing significant improvements.

Christiane Joi Allen · Libraries and Cultural Resources (University of Calgary) · India (Mumbai)

This study evaluated the environmental, social, and economic benefits of urban agriculture in Mumbai, India, using Life Cycle Assessment and Cost Benefit Analysis. Results indicate that urban agriculture has lower greenhouse gas emissions, energy consumption, and water consumption but higher eutrophication potential compared to commercial large-scale agriculture.

Jennifer C. Latimer, David Van Halen, James H. Speer‬, Stephanie Krull, Patricia G. Weaver, Joseph M. Pettit, Heather Foxx · PubMed · United States (Indiana)

This study collected over 1,061 surface soil samples from an approximately 1.25-acre urban community garden in Terre Haute, Indiana, during the summer of 2012, to evaluate the spatial distribution of lead at the plot level. The results highlighted significant variability in lead concentrations within small areas of a former residential property, with some areas showing high lead concentrations (600 ppm). Based on these findings, several areas of concern were identified, and the community garden was reconfigured to reduce potential lead exposure to gardeners and the local community.

Kamal Kishore Yadav, Pradeep Kumar Singh, R. C. Purohit · Water science and technology library · India (Udaipur)

A study in the peri-urban area of Udaipur City, India, investigated heavy metal contamination in soil, vegetable crops, and groundwater due to wastewater reuse. While groundwater-irrigated vegetables showed heavy metal levels within WHO limits, wastewater-irrigated spinach, tomato, and radish at site 3 (Kanpur – Madri Villave) exceeded maximum permissible limits for Fe, Zn, and Cd. Urban wastewater-irrigated spinach was found to accumulate Fe, Zn, and Cd significantly above permissible limits at all three selected locations, making it unsafe for human consumption.

곽혜란, 김명길 · 한국실과교육학회 학술대회논문집 · South Korea

This study developed an 18-session school-based urban agriculture program for first-grade elementary school students, integrated with their curriculum, and investigated its impact on students' emotional intelligence. After applying the program, the experimental group showed a statistically significant increase in emotional intelligence scores compared to pre-tests, with positive effects observed across all five sub-domains. These findings suggest that urban agriculture education based on integrated subjects has a positive effect on improving elementary school students' emotional intelligence.

Boong Hoon Eom, Eun Jin Jang · Journal of people, plants, and environment · South Korea (Daegu)

This study investigated Daegu citizens' awareness of urban agriculture through a questionnaire administered to 328 residents from May 9-25, 2015. The cognition level of urban agriculture was found to be very low, though experienced groups reported high satisfaction and future participation intentions were very high. Motivations included 'Hobby and leisure activities' and 'Safe food production', while perceived effects included 'Safe agricultural products' and 'Change in dietary life'. Preferred types of urban agriculture included 'Rooftop garden' and 'Learning/education type home garden'.

Matthew James Kararo, Kathryn Orvis, Neil A. Knobloch · HortTechnology · United States (Indiana)

The "Eat Your Way to Better Health (EYWTBH)" is a garden-based nutrition education program conducted and evaluated for three years in Indiana third-grade classrooms, aiming to educate youth about food sources and healthy eating habits. Participants started and maintained their own school gardens during the 8 to 12-week implementation, with outcomes assessed using pre- and post-program questionnaires. Results indicated that upon program completion, youth reported higher healthy food choice self-efficacy and increased variety in fruit and vegetable consumption.

Masdjidin Siregar · Jurnal Agro Ekonomi · Indonesia (Jakarta)

This paper describes intensive peri-urban leafy vegetable agriculture in Jakarta, which utilizes idle land and provides employment and income for rural migrants. However, the prospect of this agriculture is unclear because it uses non-agricultural land that will eventually be developed. The study concludes that government assistance in credit, extension, and research is needed, and alternative lands for cultivators must be found.

M.P Dr. Enny Zulaika · · Indonesia

A study using Azotobacter isolated from eco urban farming land at ITS, Indonesia, tested resistance and bioaccumulation of mercury (HgCl2) via selective media isolation, streak resistance testing and atomic absorption measurement, analyzed by ANOVA and LSD at the 5% level. Three isolates (A5, A6, A9) tolerated HgCl2 up to 20 mg/L, and at 5 mg/L exposure the highest bioaccumulation efficiency was recorded for A5 (89%) and A9 (87%).

Anjar Lulu Sakinah · · Indonesia

Mercury is a highly toxic and hazardous heavy metal, and bacteria able to live in mercury-contaminated habitats — mercury-resistant bacteria, including Azotobacter — are known to exist. This study aimed to obtain superior Azotobacter isolates resistant to mercuric chloride (HgCl2) from land at the ITS (Institut Teknologi Sepuluh Nopember) Eco Urban Farming site — land where mercury contamination was present — and to determine mercury reductase enzyme activity as a bioreductant converting Hg2+ to Hg0. Isolation used selective Azotobacter agar media, resistance was tested by a slant-agar streak method containing HgCl2, and mercury reductase activity was analyzed using the MRA method and spectrophotometry at 340 nm. Ten HgCl2-resistant Azotobacter isolates were obtained; isolates A5 and A9 tolerated 10 mg/L HgCl2 with optimal growth and relatively high mercury reductase activity, showing a reduction capacity of ≥3 mg/L and a reduction efficiency above 70% at an HgCl2 concentration of 5 mg/L.