Research & reports

Seyed Esmaeil Mahdavian, R. Somashekar · ePrints@Bangalore University (Bangalore University) · India (Bangalore)

A study in Bangalore city, India, showed that urban consumers are at greater risk of purchasing fresh fruits with high levels of heavy metals beyond the legally permissible limits defined by the Indian Prevention of Food Adulteration Act, 1954. These national norms are less strict than international food safety standards.

Andréa Andreis, Graziela Maria Schuh, Rejane Giacomelli Tavares · LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) · Brazil (Novo Hamburgo)

An evaluation of parasite contamination in playground soils at Horta Comunitária Joanna de Angelis in Novo Hamburgo, RS, Brazil, detected rhabditoid larvae in 33% of soil samples. An enteroparasitological survey (n=22) confirmed parasitism in 59.10% of samples. However, it was not possible to establish a correlation between the presence of parasitosis in children and in the soil.

Nathan McClintock · · United States (California)

This paper uses urban political ecology to explore the rise of urban agriculture (UA) in Oakland, California, where the city aims to source 30% of its food locally, partly from UA in "food deserts." The analysis argues that 20th-century industrial capital flows and racialized urban planning concentrated capital devaluation in the flatlands, leading to the creation of food deserts. Food justice activists are mobilizing through UA to counter these uneven transformations.

Friedhelm Streiffeler, Elsamawal Khalil Makki, Ali Ayoub · Econstor (Econstor) · Sudan (Khartoum)

This research in Greater Khartoum, Sudan, investigated urban and peri-urban agriculture as a livelihood strategy for internally displaced persons. While urban agriculture significantly reduces absolute poverty, its implementation faces many problems due to natural, economic, and social differences in the new environment, resulting in a low degree of agricultural development. Migrants with smaller fields and lower agricultural development showed a greater desire to return to their homeland, and social integration also influenced the decision to stay or return.

Chris Hillbruner, Rebecca Egan · Food and Nutrition Bulletin · Bangladesh (Dinajpur)

A study in Dinajpur, Bangladesh, from 2002 to 2003, investigated the impact of seasonality on food security and nutritional status in approximately 600 low-income urban households. Data collected through surveys and child measurements revealed significantly higher rates of food insecurity, wasting, and inadequate growth during the monsoon season compared to the dry season. While dietary diversity and lost work due to weather were identified as pathways affecting food security, child illness was not found to be a significant mechanism contributing to seasonal nutritional declines.

Gary Paul Green, Michael L. Dougherty · Community Development · United States (Door County, Wisconsin)

This paper examined culinary tourism through a case study of the Kingdom So Delicious program in Door County, Wisconsin. The analysis was based on intensive interviews with owners/managers of four restaurants and surveys of 30 retailers and 40 farmers in the region. The most frequently cited concerns with producing for local establishments involved in culinary tourism were low prices and challenging logistics.

Dick Foeken · · Africa

This study analyzed the relationship between urban policy and the practice of urban agriculture by the poor, based on two studies in Nakuru Municipality, Kenya, and Morogoro and Mbeya Municipalities, Tanzania. The legal and policy setting in these towns was found to be confusing, and the poor generally do not benefit from policy measures, if policies exist at all.

Bernard Keraita, Pay Drechsel, Flemming Konradsen · Journal of Risk Research · Ghana

A study in Ghana used participatory research methods to summarize farmers' perceptions of health risks and risk reduction measures in urban vegetable farming irrigated with untreated wastewater. Farmers were aware of health risks from wastewater, perceiving occupational skin infections as the greatest risk, while consumer health risks were rated very low. Many international risk reduction measures were deemed unsuitable by farmers, who preferred simple, low-cost alternatives.

Wei Xu · Chinese Journal of Population Resources and Environment · Global

This study examines the interaction between the sustainable development of urban agriculture and the increase in peasants' income, treating them as a combined system. It identifies a synergistic relationship between increased peasant income and urban agriculture development, but also a competitive relationship between maximizing short-term income and ecological sustainable development. The research suggests that a sustainable urban agricultural resource allocation mechanism can foster coordination and positive interaction, with urban circular agriculture economy being a basic strategy for this coordination.

Nathan McClintock · eScholarship (California Digital Library) · United States (California)

This paper explores the rise of urban agriculture (UA) in Oakland, California, using an urban political ecology framework. A macro-level structural analysis of Oakland's history reveals how 20th-century industrial capital flows and racialized urban planning concentrated capital devaluation in the flatlands, ultimately giving rise to food deserts. The study suggests that food justice activists are mobilizing through UA to counter these uneven transformations, despite critiques that some urban garden programs are neoliberal, emphasizing self-betterment while filling state-left gaps.

Cheng Cun-ren · Journal of Agricultural Mechanization Research · China

This study introduces the status of machinery equipment for facility agriculture in China and compares it with foreign equipment. It analyzes problems in Chinese facility agriculture, finding that the current machinery equipment faces challenges in achieving high efficiency, quantity, and quality compared to international standards.

Tamara García–Armisen, Josué Prats, Yociel Marrero, Pierre Servais · Water Science & Technology · Cuba (Havana)

The Almendares River in Havana, Cuba, receives wastewater from over 200,000 inhabitants, resulting in very poor microbiological water quality downstream due to high faecal bacterial indicators (FBIs). This water is used for urban agriculture and recreation, despite not meeting microbiological standards. This study compared FBI removal in three wastewater treatment plants (WWTPs): a conventional facility, a constructed wetland (CW), and a solar aquatic system (SAS). Natural systems (CW and SAS) showed approximately two log units higher FBI removal efficiency than the conventional plant. The large conventional WWTP was found to have a negative impact on the river's microbiological quality.

J.N. Hogard, Julius N. Fobil, Godfred K. Ofosu-Budu, D. Carboo, Nii‐Ayi Ankrah, Alexander K. Nyarko · · Ghana

This study in Ghana investigated the macro-nutrient content and heavy metal concentrations in solid waste composts to assess their potential for soil fertility amelioration and health implications in urban and peri-urban agriculture. Overall NPK concentration was low, with agricultural waste composts showing higher total N, K, and organic carbon than municipal solid waste (MSW) composts. Heavy metal concentrations for Ni, Zn, Cu, and Cd were generally low and within Australian standards. However, lead (Pb) concentration in mixed MSW composts was significantly high during the dry season, exceeding the Australian limit of 150 mg/kg Pb for unrestricted use. Seasons and composting processes were found to be important determinants of toxic metal concentrations in final compost products.

Adnew, Walelign · National Academic Digital Repository of Ethiopia · Ethiopia

This study assessed the general performance and challenges of Micro and Small Scale Associations (MSSAs) in Wolkite and Boutajira city administrations, using questionnaires for 92 operators and interviews with 5 officials. Findings revealed that government supports have not ensured the sustainability of these associations, and service provision is not aligned with national strategy. MSSAs exhibit high closure rates, member dropout, fail to create long-term jobs, and show insignificant women's participation.

I. Ogunlade, O. I. Oladele, A. A. Falaki · University of Dar es Salaam Library Journal · Nigeria

This study investigated the socio-economic characteristics, information needs, and seeking behavior of 100 urban farmers in Ilorin metropolis, Kwara State, Nigeria, using a structured questionnaire. It found that urban farming was a supplementary activity for highly literate individuals, with farms mainly within the city and more animal than crop production. The study suggested that urban farmers could achieve better results if technical and financial support were provided, and recommended official government recognition for urban farming.

Bernard Keraita, Pay Drechsel, Flemming Konradsen · Water Science & Technology · Ghana (Kumasi)

A study in Kumasi, Ghana, assessed the use of on-farm ponds to reduce microbial contamination in wastewater-contaminated irrigation water, analyzing over 300 samples. It found that while ponds are common, their potential for pathogen removal via sedimentation is not fully optimized. Helminth eggs reduced by about 70% with careful water collection, but thermotolerant coliforms took six days in the dry season to meet WHO guidelines, indicating suboptimal performance for some pathogens.

Pay Drechsel, Olufunke Cofie, R. van Veenhuizen, Theophilus O. Larbi · Irrigation and Drainage · West Africa

Informal irrigation in urban and peri-urban agriculture (UPA) in West Africa offers benefits but is often hindered by water pollution, threatening public health. A multi-stakeholder process implemented since 2005 in six West African cities, including Accra, Ghana, aimed to integrate UPA into sustainable urban development. However, an internal lesson learned was that local partners may not prioritize every project, and capacity-building efforts might not provide expected incentives for commitment.

Erin Foster West · · United States (Minneapolis)

This study explores the interaction between community gardens and public agencies in Minneapolis and Hennepin County, United States. It identifies that despite a large number of community gardens in the Twin Cities Metro Area, there is no comprehensive city policy for community gardening, making land acquisition difficult as vacant land becomes scarce. The research inventories public policies related to land use, water, and compost specific to community gardens, highlighting the need for public agencies to provide essential services.

Euis Suryaningsih · Jurnal Hortikultura · Indonesia (Bandung)

From January to July 2001, a field experiment on vegetable disease control in a mosaic farming system in periurban agriculture was conducted at a farmer's field in Rancaekek, Bandung, Indonesia. Treatments included white plastic net cages, biorational pesticides, Bacillus subtilis, a mixture of Mancozeb and Bacillus subtilis, and an unsprayed control. All tested alternative control methods were very effective against major diseases of chili pepper, shallot, eggplant, beans, and cucumber, but the use of poisonous synthetic pesticides in periurban agriculture increases the likelihood of contaminating humans and the environment.

Anne‐Marie Hamelin, Céline Mercier, Annie Bédard · Public Health Nutrition · Canada (Quebec City)

A study in Quebec City, Canada, interviewed 55 food-insecure households and 59 stakeholders to compare perceptions of food security needs and community programs. While both groups agreed on the need for better financial resources, households reported that food quality and access were neglected, and that existing programs, even combined, were insufficient to meet their needs. Stakeholders, however, largely perceived households as satisfied with programs and believed their primary need was a basic amount of food. The study concluded that community programs alone cannot bring about the social change needed to prevent food insecurity.

M. B. David · African Affairs · Kenya

This study on urban agriculture in the Kenyan town of Nakuru illustrates health and environmental problems associated with keeping livestock in urban areas, the small size of plots cultivated, and the dependence of urban households on rural sources of food. These findings were observed in the context of economic hardships occasioned by structural adjustment programmes since the 1980s.

Dorothy Blair · The Journal of Environmental Education · United States

An evaluative review of U.S. literature on children's gardening found that quantitative studies showed positive outcomes in science achievement and food behavior. However, these studies did not consistently demonstrate improvements in children's environmental attitude or social behavior, and validity and reliability issues reduced general confidence in the results. Qualitative studies documented a wider range of desirable outcomes, but teacher enthusiasm varied based on support and horticultural confidence.

R. Machiridza, Emmanuel Manzungu · University of Zimbabwe Institutional Repository (University of Zimbabwe) · Zimbabwe (Harare)

Perceptions of urban agriculture in Harare, Zimbabwe, shifted from prohibition before 1980 due to environmental concerns to de facto government policy after independence due to increasing urban poverty. Land was initially allocated to co-operatives primarily for political support, creating tension between political patronage and environmental protection. Critics argue that authorities only accepted urban agriculture's reality two decades post-independence, driven by its potential for poverty reduction and economic development.

Evan Green · · United States (California)

A literature meta-analysis on lead contamination in urban farms was applied to Alemany Farm in San Francisco, California, where soil lead concentrations range from 60 to 720 ppm. It found that every food crop except tree fruits may pose a health risk if grown in Alemany Farm's soil. A phytoremediation plan using Indian mustard (Brassica juncea) to remove lead was found to exceed the farm's available budget, and its timescale made it impractical. The study concludes that phytoremediation is generally not feasible for small-scale urban farms and that other measures are needed to reduce lead exposure for urban farmers.

XU Yong-xian, Biao Huang · Soils · China

A study of a small-scale vegetable farming system in peri-urban Nanjing, China, monitored heavy metal balances and pollution potential from July 2003 to July 2004. Heavy metals entered the soil mainly through fertilization and irrigation, with organic manure application accounting for more than 98% of inputs. Annual heavy metal input in the area was significantly higher than in European farmland, while annual output was very low, under 10% of input, leading to accumulation of heavy metals in the plots; long-term vegetable cultivation had already caused heavy metal buildup in the soils. Copper, lead, zinc, and cadmium concentrations in vegetables and soil were still below national safety standard limits, so the vegetable farming system was assessed as currently safe. However, an evaluation that incorporated atmospheric deposition showed the region carries a high risk of copper, zinc, and cadmium contamination, and the study concludes that intensive vegetable cultivation will aggravate soil heavy metal pollution, potentially pushing the soil to Second Grade of the National Soil Environment Quality Standard within several decades.