Research & reports

Godswill Azinwie Asongwe, Bernard Palmer Kfuban Yerima · Greener Journal of Soil Science and Plant Nutrition · Cameroon (Bamenda)

This study analyzed heavy metal levels (chromium, manganese, lead, cadmium) in 21 urban and peri-urban agricultural wetland soil samples in Bamenda municipality, Cameroon. Average concentrations were 35.73 mg/kg for chromium, 0.08 mg/kg for manganese, 30.64 mg/kg for lead, and 0.45 mg/kg for cadmium. These concentrations were generally lower than the maximum WHO permissible levels.

Douglas Roberto Bizari, Jean Carlos Cardoso · Horticultura Brasileira · Global

This article discusses the potential of using recycled water from treated domestic sewage in urban horticulture as a solution to escalating clean water shortages. While cultural and sanitary impediments exist for large-scale use, and knowledge of treatments is limited, a safe alternative is irrigation for non-edible species like those in floriculture and landscaping. This approach can combine environmental protection with agricultural productivity, support local development, create jobs, and aid environmental protection.

Luz Dary Agudelo, María Fernanda Sanabria, Deivis Suárez Rivero · Journal of research in engineering sciences. · Colombia (Bogotá)

This research investigated the growth and productivity of peas (Pisum sativum L.) with the application of organic fertilizers in urban agriculture conditions in Bogotá, Colombia. The experiment was conducted in two Community Integrated Units of Urban Agriculture (UICAU), "SOS" and "Sceptre Grow." Variables such as stem length, stem thickness, number of true leaves, and productivity were evaluated. The study found that Super Soup biofertilizer at a 1/10 vv dilution yielded the best stem length in villages, while a 1/30 vv dilution and the "Growth Center" UICAU showed better results for the number of leaves and overall productivity.

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.

Araceli Calderón Cisneros · Dialnet (Universidad de la Rioja) · Mexico (Chiapas)

This qualitative study analyzed the role of family urban agriculture in urban sustainability in San Cristobal de Las Casas, Chiapas, Mexico, using open and structured interviews. The visited agricultural systems showed characteristics favoring resilience and sustainability, such as low use of external inputs and recycling of domestic waste. However, a limitation found was that the contribution of own production to family consumption is very low, despite existing food, environmental, and socio-cultural motivations for its continuity.

Luis Malagón González · · Global

This research aims to create a company by designing a prototype for sustainable urban agriculture, utilizing recycled and reused elements to facilitate human management and integration with the natural environment.

Galdino Xavier Paula Filho, Gutemberg Armando Diniz Guerra · Cadernos de Agroecologia · Brazil (Altamira)

This study analyzed alternative vegetable production systems in nine urban gardens in Altamira, Pará, Brazil, focusing on methods avoiding agrochemicals and chemical fertilizers, and their commercialization in two local open-air markets. Semi-structured interviews and on-site visits revealed that pest and disease control uses natural repellents like pepper, tobacco, neem, and garlic compounds. Fertilization relies on wood sawdust, crop residues (rice and coffee straw), and animal manure. Commercialization is linked to social organization and occurs through producer associations at open-air markets.

Gundula Proksch · · Global

This chapter discusses the potential of urban agriculture to mitigate water management challenges. While industrial agriculture consumes 70% of accessible water, cities struggle with water security and fail to utilize on-site sources like rainfall. Urban agriculture is presented as a solution to these water challenges by integrating water-efficient strategies with existing urban infrastructure, building systems, and management approaches.

Gundula Proksch · · Global

This chapter investigates factors for implementing sustainable, energy-efficient urban agricultural operations, focusing on the solar needs of plants, the extension of growing seasons indoors, and passive solar gains for buildings. It provides an overview of greenhouse typologies, cover materials, and lighting systems to optimize energy use and production. Additionally, it examines the potential for photosynthesis and the carbon cycle to utilize building exhaust systems for CO2-rich air and excess heat to support crop cultivation, exploring intersections among nutrient, water, and energy cycles through case studies.

Hardiyanto Hardiyanto, Constancio C. de Guzman · Indonesian Journal of Agricultural Science · Philippines (Metro Manila)

This study investigated the levels and distribution of lead (Pb) and cadmium (Cd) in white cabbage, soil, and irrigation water from urban agricultural sites in Las Piñas and Parañaque, Metro Manila, Philippines. Field areas were divided into three sections based on distance from the main road (0, 25, and 50 m), and metal contents were measured by Atomic Absorption Spectrophotometry. The average Pb content (1.09 µg g-1 dry weight) in white cabbage was highest immediately beside the main road, with a similar trend in soil. A negative relationship was found between distance from the main road and Pb and Cd contents in white cabbage and soil. While overall concentrations of Pb and Cd in white cabbage, soil, and irrigation water were within acceptable limits, further study on heavy metal contamination in crops, especially those grown along main roads, was suggested.

Kafeel Ahmad, Zafar Iqbal Khan, Asma Ashfaq, Ameer Khan, Hazoor Ahmad Shad, Mujahid Sher, Zahoor-ul-Hassan Dogar, Ijaz Rasool Noorka, Sumaira Yasmin, Vincenzo Tufarelli, Eugenio Cazzato · The Philippine Agricultural Scientist · Pakistan

This study analyzed heavy metal and metalloid levels in soil and cabbage (Brassica oleracea) from two urban farming sites in Sargodha, Pakistan, irrigated with wastewater. Findings showed that mean concentrations of arsenic (As) and cadmium (Cd) in soil, and manganese (Mn), nickel (Ni), copper (Cu), zinc (Zn), molybdenum (Mo), cadmium (Cd), and lead (Pb) in cabbage, exceeded permissible limits at both sites. Significant differences were observed in metal and metalloid levels in vegetable samples between sites.

Rosicléia Silva, Mauricio Ricardo De Paula Dias, Flávio Sampaio Mendes, Hevelyn Soares das Chagas, Roberta de Fátima Rodrigues Coelho · Cadernos de Agroecologia · Brazil

This study evaluated the contribution of urban agriculture to the socioeconomic development of the Areia Branca community in Santa Izabel do Pará, Brazil, by profiling families and understanding the influence of agricultural activity. Through on-site observations and socioeconomic questionnaires, it was found that agriculture is the main source of income for most families, primarily involving leafy vegetable cultivation with family labor. Despite being low-tech, the agriculture is not organic due to the recurrent use of chemical fertilizers.

Mujtaba Baqar, Nadia Jamil, Naveed Ahsan, Kiran Khanum, Abdul Qadir, Mariyam Zameer, Anam Khalid · Transylvanian Review · Pakistan (Lahore)

This case study investigated the impacts of heavy metals from wastewater irrigation on soil, groundwater, and leafy vegetables (Indian mustard, spinach, fodder) in the Charrar Drain catchment, Lahore, Pakistan. Samples were collected from seven sites. Drain water showed Cd, Cr, and Pb concentrations exceeding limits at most sites, and groundwater Cd concentrations also exceeded limits, though Cr and Pb were within permissible ranges. Soil samples contained Cd, Cr, and Pb, and leafy vegetables irrigated with wastewater showed varying heavy metal concentrations, indicating a heavy metal bioaccumulation issue that may exceed threshold limits.

Christie Elise Liebig · DigitalCommons - CalPoly (California State Polytechnic University) · United States (California)

This graduate internship involved developing a school and community garden at Joseph Kerr Middle School in California, United States. The garden provides hands-on learning for students, who harvest fresh produce and distribute it to families lacking access to fresh produce. Some produce was also donated to a local food bank, emphasizing the program's focus on teaching sustainable practices.

Gabriel Rezende Marques, Maria Regina de Miranda Souza, Leo Rinaldo de Arantes Lazzerini, Cláudia Lúcia de Oliveira Pinto · Cadernos de Agroecologia · Brazil (Viçosa)

This study described and evaluated the implementation and adoption of an urban garden by socioeconomically vulnerable students residing in the Federal University of Viçosa dormitory in Viçosa, Brazil, and how the experience influenced their quality of life, civic education, perception, and interest in agroecology. It was found that the use of urban agriculture from an agroecological perspective is an alternative for improving the quality of life in residences and for expanding agroecological knowledge.

Glorinha Correa Neta, Francisneide de Sousa Lourenço, Naiana Marinho de Souza, J. N. de P. Lourenço, Rainielly Barbosa Soares · · Brazil

This work reports on an experience in the Nova Esperanca community in Brasileirinho, Brazil, with a project focused on a community garden as a propagator of agroecological knowledge. The project aimed to develop activities for vegetable cultivation using agroecological practices. Through tools like Venn diagrams and seasonal calendars, the study observed the difficulties the community faced in planting the Erapakatupa garden.

Chieh-Fu Cheng, Simon Chen-Tsang Tsai, Bin-Min Sung · · Taiwan

This study in Hualien, Taiwan, applied social capital theory to investigate how social capital dimensions facilitate the development of community-based organic agriculture, focusing on an experimental green restaurant. Participant observations and in-depth interviews with 7 local organic farmers were conducted. Results revealed that the experimental green restaurant must continually fulfill various social functions (e.g., educator, information platform, resource distributor) and accumulate social capital to extend its internal ties with local farmers into relationships based on mutual trust and reciprocity.

Talita Slota Kutz, Fernanda Daniela Bandelero, Jéssica Cardoso, Thiago de Olivera Vargas · · Brazil

This work describes a 16-hour theoretical-practical workshop conducted in a settlement in Peritoro-MA, Brazil, during the "Operacao Velho Monge" of Project Rondon in 2014. The workshop aimed to disseminate agroecological horticulture through the implementation of a pilot community garden project with drip irrigation and composting systems, facilitating learning for both the settlement community and participating students.

John Taylor, Sarah Taylor Lovell, Sam E. Wortman, M.K. Chan · Renewable Agriculture and Food Systems · United States (Chicago)

In Chicago, semi-structured interviews and plant inventories were conducted with 59 African American, Chinese-origin, and Mexican-origin households regarding ecosystem services and tradeoffs in their home food gardens. A total of 387 plant species were identified; gardens of African American households were rich in ornamental species, while those of Chinese-origin households had a depauperate flora. Shade trees and a developed shrub layer were absent from most gardens, suggesting a tradeoff in ecosystem services favoring food production. Only 9.6% of the inventoried species were native to the Chicago area.

Valerie Chiykowski, Guhan Chendurnathan, Jun S. Lee, Lius Daniel · cIRcle (University of British Columbia) · Canada

This project at the University of British Columbia's Student Union Building (SUB) aimed to reduce contamination in post-consumer organics bins using visual prompts. While the intervention successfully decreased both the percentage weight and level of contamination, the overall weight of compostable waste also decreased post-intervention. The study suggests considering confounding factors like a sustainability fair during baseline data collection and improved bins, and proposes an infrared sensor-based audio prompt system for future efforts.

Annette Voigt, T. E. Leitão, Andrew Hursthouse, Ari Jokinen, Avigail Heller, Monika Latkowska, Paulo Brito da Luz, Yvonne Christ, Béatrice Bechet, Mart Külvik, Johannes Langemeyer · · Global

This chapter presents guidance on tools for undertaking an ecological assessment with a simple, integrated, and systemic approach using sets of indicators. Agro-environmental indicators allow efficient assessment of the state, trends, and rate of change of environmental status or ecosystem services. Indicators for a garden’s suitability as a habitat depend on selected species and their demands. Gardens near the seashore require coping with difficult environmental conditions, and water requirements vary by climatic zone and crop evapotranspiration rates. Improving physical and chemical soil conditions generally enhances crop growth and reduces risks of erosion, compaction, and poor drainage. Urban gardening can expand habitat areas for particular animal species from nearby green areas. The chapter provides information on minimizing main risks from urban environmental pressures on urban gardening.

Andrew Hursthouse, T. E. Leitão, Annette Voigt, Avigail Heller, Béatrice Bechet, Paulo Brito da Luz · HAL (Le Centre pour la Communication Scientifique Directe) · Europe

This chapter overviews factors influencing the chemical, physical, and biological status of soils, water, and the biosphere in urban allotment gardens. It highlights that urban garden soils, water, and biosphere are affected by pollution due to their location in city centers or suburbs, with traffic infrastructure and industrial zones widely identified as impacting soil and water quality. Concerns over long-term risks from pollutant transfer (mainly metals) from soil to plants in these uncontrolled environments have been widely publicized.

Hilary Bambrick, Stefano Moncada · QUT ePrints (Queensland University of Technology) · Ethiopia

A photo-documentation report on a water point installed in 2012 as part of a biogas development initiative in an informal urban community of 200 households in Shashemene, Ethiopia. The facility comprises four latrines, an inlet for animal waste, a fermentation chamber, and a communal kitchen with four stoves; the fermented slurry by-product is used as fertiliser for the community garden. The report states that the system improved management of human and animal waste, reducing gastroenteric disease; provided cleaner cooking fuel than wood, dung, or charcoal, reducing indoor air pollution and respiratory disease risk; lowered household fuel costs; and increased food production and income through the fertiliser it generates.

Afsana Akther, Tofael Ahamed, Tomohiro Takigawa, Ryozo Noguchi · Journal of the Japan Institute of Energy · Global

This study proposes a GIS-based multi-criteria analysis model for solid waste management in Dhaka, Bangladesh, incorporating factors such as waste-generating site locations, road networks, environmentally sensitive locations, causes of illegal dumping, and waste segregation to select suitable sites for waste disposal and composting that would support urban agriculture. Using exclusionary criteria, decision factors, and weighted standardization, the analysis produced a suitability map identifying potential composting site locations.

Alexandra Doernberg, Ingo Zasada, Katarzyna Bruszewska, Björn Skoczowski, Annette Piorr · Sustainability · Germany

A 2016 study applies a food systems approach to examine the potential and limits of regional organic food supply in the Berlin Metropolitan Region (BMR), Germany. Using an analytical framework built from the literature and qualitative interviews plus a stakeholder workshop on two alternative food network types — organic community supported agriculture (CSA) and organic retail trade — it finds that demand for regional organic food exceeds regional supply, while identifying obstacles including limited access to land, rising rental prices, insufficient processing capacity, and an unsupportive political environment for organic farming.