Research & reports

Fiky Yulianto Wicaksono, Tati Nurmala · Dharmakarya · Indonesia

An online training and simulation on environmentally friendly urban farming, utilizing household waste, was conducted from January to February 2021. Participants were selected based on their existing practice or desire to practice urban farming at home. The results of this outreach indicated that the speakers' expertise enhanced participants' knowledge, and most participants understood the training material and practiced environmentally friendly urban farming.

Mary Njoki Mwaura, Sabina Mukoya-Wangia, Japheth Ododa Origa, O.L.E. Mbatia, Evans Chimoita · Journal of Agricultural Extension · Kenya

A study of 149 respondents in Nairobi County examined urban and peri-urban agricultural practices, finding composting and open field farming popular but not the most profitable. More profitable practices like cattle rearing and mushroom farming were unpopular due to expensive inputs and specialized skills. The study indicates that popular practices are less profitable, highlighting a need for transformation towards controlled environment agriculture with policy support.

Mahmudah Hamawi, Use Etica · Prosiding Sains Nasional dan Teknologi · Indonesia (East Java)

This study aimed to examine the effect of growing media mixtures on celery yield. The research was conducted from May to June 2020 at the UNIDA Gontor Faculty of Science and Technology practice land in Ponorogo, East Java. A completely randomized design with one factor and five replications was used to compare four growing media mixtures (A=control, B=soil+compost+rice husk charcoal, C=soil+compost+wood charcoal, D=soil+compost+kitchen ash). Results showed that the soil and compost mixture produced the largest wet weight of celery leaves, which was not significantly different from the soil+compost+rice husk charcoal mixture, but significantly different from the soil+compost+kitchen ash mixture.

Ana Manríquez-Altamirano, Jorge Sierra-Pérez, Pere Muñoz, Xavier Gabarrell · Journal of Cleaner Production · Global

This study proposed an eco-design methodology to upcycle tomato stems, identified as the most promising agro-urban solid waste from rooftop greenhouse tomato crops, for local "do-it-yourself" use. Researchers characterized tomato stems physically, chemically, and mechanically, then conducted a creative session with specialists to identify applications. Resulting concepts included "Fences and trellises," "Packaging," and "Boards, panels and blocks," providing data on stem characterization for broader biomass utilization.

Lucas Sales dos Santos, Milena De Moura Régis, Ana Paula Branco do Nascimento · Revista Nacional de Gerenciamento de Cidades · Brazil (São Paulo)

This study investigated an organically grown community garden in the Previdência Municipal Park in the West Zone of São Paulo City, Brazil, through in-situ observations, interviews, and literature review. The findings indicated benefits for food and nutrition safety, interpersonal involvement, and environmental education. Key challenges identified were social leaderships, technical-scientific knowledge for organic productivity, and planning for project continuity.

Naiane Modri Fuzinatto, Jaciney Aparecida Danielli, Daniela Preschlak, Augusto Fischer · Revista em Agronegócio e Meio Ambiente · Brazil

This study presented a proposal for organic strawberry cultivation in urban spaces for a small producer and evaluated the financial viability of local sales. Through a qualitative and quantitative case study in Santa Catarina State, results indicated social and environmental benefits from adopting urban strawberry cultivation under an organic production system. Furthermore, the entire investment could be recovered in just over two years, representing a medium-term return on investment.

Kousaku Ohta, Masatoshi Funabashi · Measurement Sensors · Global

This study achieved high biodiversity (over 200 plant species) on an urban rooftop garden using the Synecoculture method and analyzed soil microbial diversity, activity, and chemical properties over two years. Soil microbes gradually increased in diversity and activity after installation, showing a positive correlation with cation exchange capacity. After two years of continuous practice, human subjective evaluations were qualitatively consistent with objective data, suggesting that trained human subjectivity could be incorporated as part of assessment proxies in future ecosystem management research.

Jemima Japakumar, Rosazlin Abdullah, Noor Sharina Mohd Rosli · AGRIVITA Journal of Agricultural Science · Malaysia (Kuala Lumpur)

A field study in an urban community garden in Kuala Lumpur, Malaysia, investigated the effects of biochar and compost on Amaranthus sp. growth and soil properties. Using a randomized complete block design with five treatments, the combination of biochar and compost significantly increased plant height, leaf count, leaf width, chlorophyll content, fresh and dry weight, soil organic matter, and soil organic carbon content compared to other treatments. This combination showed the best effects in enhancing both soil properties and plant growth.

Michelle Brener Mizrahi · European Journal of Cultural Management and Policy · Europe

This paper analyzes how Incredible Edible Todmorden (IET), a community-led project, operated notions of sustainability through permaculture and urban farming to focus on community building and its impacts on education and local culture. The paper puts forth the argument that the discursive operationalization of sustainability can produce important effects in community building, education, and local culture at a local level.

Hope Baxter Chamdimba, Isaiah Omosa, Simon M. Wandera · Journal of Energy Environmental & Chemical Engineering · Kenya (Nairobi)

This review analyzed urban food waste in Nairobi City County, Kenya, which accounts for 64% of recoverable municipal solid waste, totaling 29.4 thousand tons annually. The study found that food waste has a biomethane potential of 508.45 ml CH4 /g VS, suggesting that the city's food waste could yield 10.5 million m3 of methane and 1.38 MW of electricity. While food waste is increasingly used for animal feed and composting, its application for energy recovery via anaerobic digestion is limited by a lack of source separation. Biogas is shown to be more economical than liquefied petroleum gas, but long-term methane generation requires supportive policies.

Corinna Schröder, Franziska Häfner, Oliver Christopher Larsen, Ariane Krause · Agronomy · Global

This pot trial with lettuce plants assessed the fertilizer value of composts derived from urban organic waste. Seven treatments, including food waste vermicompost and thermophilic compost from green waste and human feces, were investigated. Lettuce yield and total uptake of P, K, Ca, and Mg were highest with coir-based vermicompost, while fecal compost resulted in high shoot P and K but lower Ca and Mg uptake. All composts required additional nitrogen for lettuce growth, indicating a need for further research on macronutrient availability and alternative N sources.

Ahmed Khadra · IGI Global eBooks · Global

This chapter examines the health effects of climate change, specifically focusing on the global issue of fecal peril caused by intestinal parasites. It suggests that water shortages, driven by climate change, increase pressure on water resources, leading to greater use of urban wastewater for irrigation in urban agriculture. Unsafe management and inappropriate wastewater use are likely to exacerbate the transmission of infectious diseases, including those caused by intestinal protozoa and helminths.

Dong BaoCheng, Wei Li, Wenyong Xu · Antibiotics · China

A field experiment in peri-urban agricultural soil in China investigated the effects of partially substituting chemical fertilizer with organic fertilizers like pig manure and sewage sludge on soil quality and antibiotic residues. Organic substitution significantly increased residual antibiotic levels in agricultural soil, with antibiotic sequestration rising by 138.1~332.5%. This indicated that organic fertilizers can promote antibiotic persistence in soil by modifying soil quality, demonstrating a contamination risk.

Tainá Souza Santos · · Brazil (São Carlos)

This paper investigates knowledge practices within the Community Supporting Agriculture of São Carlos, Brazil, through the words of farmer Dina. The research, conducted from August 2019 to October 2020, relates ethnographic material to contemporary anthropological discussions on ecology and knowledge. It also compares Dina's agroecological production techniques with the production of ethnographic writing.

Tariro Gwandu, Lynsay I. Blake, Hatirarami Nezomba, Jairos Rurinda, Stephen Chivasa, Florence Mtambanengwe, Karen L. Johnson · Environmental Geochemistry and Health · Sub-Saharan Africa

An eight-week greenhouse experiment in Sub-Saharan Africa evaluated the short-term benefits of applying aluminum-based water treatment residual (Al-WTR) with compost and inorganic phosphorus fertilizer on maize productivity. A co-amendment of 10% Al-WTR and 10% compost significantly increased maize shoot biomass (3.92 ± 0.16 g) compared to the control (1.33 ± 0.17 g). Adding phosphorus fertilizer to this co-amendment further doubled the yield and increased maize uptake of zinc, copper, and manganese.

Samuel Ken‐En Gan, Ser-Xian Phua, Joshua Yi Yeo, Zealyn Shi‐Lin Heng, Zhenxiang Xing · Methods and Protocols · Global

This study investigated using mealworms and superworms to consume polystyrene (PS) and their frass as plant fertilizer. Researchers found that small amounts of sucrose and bran increased PS consumption by the worms. Superworm frass, in particular, supported better growth and rooting of dragon fruit cacti over a fortnight compared to mealworm frass and control media. These findings suggest worms could offer a zero-waste solution for plastic degradation and urban farming.

Ambrogio Zanzi, Federico Andreotti, Valentina Vaglia, Sumer Alali, Francesca Orlando, Stefano Bocchi · Sustainability · Italy (Milan)

This study aimed to assess the benefits of an agroecological requalification of a dismissed peri-urban area in the South Milan Agricultural Regional Park, Italy. Using I-Tree Eco software, the provision of ecosystem services from planting new hedgerows was simulated over 30 years, showing that the planted area becomes an essential supplier of regulating ecosystem services for neighborhoods, increasing carbon storage and air pollution removal. A notable increase in carbon sequestration was observed at the end of the simulation, demonstrating a replicable methodology and techniques for assessing ecosystem services in urban and peri-urban environments.

Francis Mwanza, Erick Komba, Dominic Kambarage · International Journal of Microbiology · Tanzania (Dar es Salaam)

This study in Dar es Salaam, Tanzania, investigated the occurrence, antimicrobial resistance, and genetic relatedness of E. coli isolates from 156 samples of manure, vegetables, and fish. Of these, 36 samples (23.1%) were positive for E. coli, yielding 48 isolates. A significant finding was that 25 (52.1%) of these isolates were resistant to at least one antimicrobial agent, and 12 (48.0%) showed multidrug resistance, indicating a potential microbial health risk to humans through contamination.

Solomon Tulu Tadesse, O. Oenema, Christy van Beek, Fikre Lemessa Ocho · Frontiers of Agricultural Science and Engineering · Ethiopia

This study in Jimma, Ethiopia, from 2015-2050, used an N mass flow model and field experiments to explore manure recycling from urban livestock farms under four scenarios. It found that livestock manures are the main organic wastes in urban areas, and manure production in urban and peri-urban agriculture (UPA) is projected to increase 3 to 10 times. Critically, only 13% to 38% of manure nitrogen will be recycled in croplands, and intensification of urban livestock production greatly increased nitrogen surpluses, indicating a significant environmental tradeoff.

Jennifer Jevons · · New Zealand (Wellington)

The work of Kaicycle, an urban farming initiative located on Wellington City Council land in New Zealand, was spotlighted. This initiative aims to help the community by improving awareness of soil health, advocating for food waste minimization, growing produce, and practicing regenerative composting. Kaicycle recycles food scraps from the community, composts using anaerobic microbes, and produces vegetable boxes for sale.

Haryuni Haryuni, Sapto Priyadi, Suswadi Suswadi, Mrih Rahayu, Achmad Fatchul Aziez · PROSIDING SEMINAR NASIONAL DIES NATALIS 41 UTP SURAKARTA · Global

This article reviews types and management of urban farming, concluding that vertical farming is widely adopted due to its adaptability to limited urban land. Plant management typically involves planned and regular practices, utilizing household waste for fertilization and pest control. Common plant disturbances are caused by insects, fungi, bacteria, and viruses.

Felipe Parada, Xavier Gabarrell, Martí Rufí-Salís, Verónica Arcas‐Pilz, Pere Muñoz, Gara Villalba · The Science of The Total Environment · Spain (Barcelona)

This study investigated the agronomic performance and environmental life cycle impacts of three different fertigation management practices (open, 30% recirculation, and recirculation with a further 15% fresh water reduction) for tomato crops in a rooftop greenhouse in Barcelona. All three practices resulted in similar yields, but the recirculation with reduced fresh water input was the most water-efficient, requiring 48.7 liters per kg of tomato. In terms of environmental performance, the recirculation practice showed the best performance in most impact categories, particularly in marine and freshwater eutrophication, with 44% and 93% fewer impacts than the open management.

Cecilia Herbón, María Teresa Barral, Remigio Paradelo · Applied Sciences · Spain (Santiago de Compostela)

The concentrations of trace elements Cu, Pb, Zn, Ni, Cr, and As were investigated in 55 urban soils in Santiago de Compostela, northwestern Spain. While most soils showed higher trace element concentrations than regional backgrounds, they were not classified as contaminated according to Spanish regulations. However, geoaccumulation index values indicated low to moderate pollution levels in most soils, with Cu, Pb, and Zn highest in city center green areas, and Cr and Ni linked to parent material lithology.

Zachary Burt, C. Shambu Prasad, Pay Drechsel, Isha Ray · Journal of Water Sanitation and Hygiene for Development · India (Karnataka)

A preference-ranking model was developed to understand the acceptance of fecal sludge-derived fertilizer (FSF) in Karnataka, India, by modeling farmowners and farmworkers separately. The study found that farmers willing to use FSF prefer to conceal its origins from workers and their caste group, especially caste-adhering, vegetarian farmowners. Workers were open to FSF if it resembled cow manure, revealing that the waste economy in rural India is shaped by unacknowledged caste hierarchies and practices.

Pedro Henrique Sousa Silva, Iara SuilaAlmeida do Nascimento, Cauê Barbosa Coelho, Patrícia Barbosa da Silva, Regina Lúcia Félix de Aguiar Lima · Brazilian Journal of Development · Brazil

This study evaluated the occurrence and degree of association between arbuscular mycorrhizal fungi (AMF) and leafy vegetables from Asteraceae, Aliaceae, Apiaceae, Amaranthaceae, and Brassicaceae families, grown organically in an urban community garden in Brazil. Mycorrhizal colonization in lettuce varieties (Asteraceae) ranged from 10% to 40%. Chives (Aliaceae) showed an average colonization of 16%, and Apiaceae species had colonization ranging from 7.4% to 23%. In contrast, Amaranthaceae species (beetroot and spinach) showed no AMF structures in their roots, and Brassicaceae species showed colonization ranging from 0% to 19.5%.