Research & reports

Sophie Graefe, Eva Schlecht, Andreas Buerkert · Outlook on Agriculture · Niger (Niamey)

Semi-structured interviews with 130 households in Niamey, Niger, characterized urban and peri-urban agriculture (UPA) and assessed resource use. The study found high use of livestock manure and indiscriminate use of nutrient-loaded wastewater for irrigation, leading to significant nutrient surpluses in UPA gardens. Initial calculations suggested large gaseous emissions of nitrogenous compounds and and leaching of nitrogen, phosphorus, and potassium to groundwater.

Eveline Klinkenberg, Philip J. McCall, Michael D. Wilson, Felix P. Amerasinghe, Martin J. Donnelly · Malaria Journal · Ghana

This study investigated the impact of urban agriculture on malaria transmission risk in Accra, Ghana, through larval and adult mosquito surveys. It found that Anopheles spp. and Culex quinquefasciatus outdoor biting rates were three and four times higher, respectively, in areas around agricultural sites compared to areas far from agriculture. The annual Entomological Inoculation Rate (EIR) was also higher in agricultural areas (19.2) than non-agricultural areas (6.6), suggesting that urban agricultural areas may increase malaria transmission risk by providing resting sites for adult mosquitoes.

Julie Ober Allen, Katherine Alaimo, Doris Elam, Elizabeth Perry · Journal of Hunger & Environmental Nutrition · Global

This 2008 qualitative case study examined two neighborhood-based community gardens with youth programs, using participant observation and in-depth interviews with various stakeholders. The study found that these garden programs offered opportunities for constructive activities, community contributions, skill development, and improved nutrition for participating youth. Community gardens promoted developmental assets for youth while enhancing their access to and consumption of healthy foods.

Hester Parr · · Global

This work explores the relationship between mental health and social space, examining various contexts. Chapters cover geographies of difference in mental health, community and citizenship, rural communities, and the therapeutic potential of urban gardening for citizenship and social inclusion. It also discusses artistic spaces and virtual communities in relation to mental health.

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.

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.

Alberto Zezza, Luca Tasciotti, Zezza, Alberto, Tasciotti, Luca · AgEcon Search (University of Minnesota, USA) · Global

This paper investigates the importance of urban agriculture (UA) for poor and food-insecure households in urban areas, using survey data from 15 developing or transition countries. It aims to fill research gaps by analyzing, from a comparative perspective, UA's potential role in addressing urban food insecurity problems. The paper defines UA as crop and livestock production within city boundaries.

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.

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.

Jayakody P., Gunawardana I., Guneratne S., Clemett A., Dissanayake P. · IWMI Research Reports (WASPA Asia Project Report 8), International Water Management Institute · Sri Lanka (Kurunegala)

This IWMI report documents peri-urban paddy cultivation using diverted municipal wastewater around Kurunegala city, highlighting the practice as representative of urbanization impacts on Sri Lankan agriculture while identifying significant public health risks from untreated effluent irrigation.

Barbara Matthys, Andres B. Tschannen, Norbert T. Tian‐Bi, Hermann Comoé, Salia Diabaté, Mahamadou Traoré, Penelope Vounatsou, Giovanna Raso, Laura Gosoniu, Marcel Tanner, Guéladio Cissé, Eliézer K. N’Goran, Jürg Utzinger · Tropical Medicine & International Health · Côte d'Ivoire

A cross-sectional survey was conducted in urban farming communities in Man, western Côte d'Ivoire, involving 113 farming households (586 individuals) and 21 non-farming households (130 individuals). The prevalences of S. mansoni and hookworm in farming households were 51.4% and 24.7%, respectively. Risk factors for S. mansoni included close proximity to the Kô River, water contact with irrigation wells and ponds, and low education attainment, while risk factors for hookworm included living in smallholder irrigated rice plots or large rice perimeters, using domestic well water, and low socioeconomic status.

Nita Chaudhuri, Daryl Cole, D S Niang · Epidemiology · Senegal (Dakar)

A Participatory Education and Action Research (PEAR) process was conducted with 3 farmers in periurban Dakar, Senegal, and surveyed 55 farmers using pre- and post-intervention questionnaires. Post-intervention, farmers showed a clearer understanding of environmental impacts like water contamination and pesticide runoff, and perceived a broader range of health risks linked to urban agriculture. Observations also indicated reduced pesticide container litter in the fields.

Emily Brady · Ethics Place & Environment · Global

This article explores whether environmental and land art-making encourages positive aesthetic-moral relationships between nature and humans. It critically examines a particular type of aesthetic objection to these artworks and defends the work of Robert Smithson and Andy Goldsworthy, among others, against this charge. It is argued that some forms of environmental and land art show "aesthetic regard" for nature, rather than constituting an "aesthetic affront" to nature.

Donna Tangen, Ruth Fielding‐Barnsley · Australian Journal of Environmental Education · Global

This study evaluated the effects of school gardening on English as Second Language (ESL) students' learning about good nutrition in a culturally diverse school. Data collected indicated positive gains in student learning and increased feelings of belonging to the school community. The study suggested that teacher attitudes significantly influence ESL student engagement in environmental education, and garden-enhanced lessons provided effective experiential learning that supported in-class nutrition education.

Susan Thompson, Linda Corkery, Bruce Judd · · Australia (Sydney)

This research investigated a community garden scheme within a large high-rise public housing estate in Sydney's inner west, Australia, as part of an urban renewal program. The study found that the project yielded a broad range of positive physical and psychological well-being outcomes for tenants, including opportunities for relaxation, physical activity, socialization, cultural exchange, learning horticulture, and access to low-cost fresh produce. The findings confirm that community gardens can significantly enhance physical, emotional, and spiritual well-being, contributing to healthy and socially sustainable communities.

Hiroyuki Akagawa, Katsuyuki FUKUMI, Takayuki Kubota, Hideki Takebayashi, Masakazu Moriyama · Journal of Environmental Engineering (Transactions of AIJ) · Global

This study investigated the thermal environment and visitor behavior at a large rooftop garden on a commercial building during summer. Findings indicated that resting places in tree shade were "non-Hot" under high solar radiation, though SET* was higher than in shaded open spaces due to wind speeds around 1m/s. The rooftop garden featured well-shaded footpaths that provided "non-Hot" conditions for most of the afternoon. Tree shade was desirable on fine days, while open spaces were preferred on cloudy days. SET* was identified as the most appropriate index for evaluating the relationship between human behaviors and the thermal environment.

Bernard Keraita, Flemming Konradsen, Pay Drechsel, Robert Clement Abaidoo · Tropical Medicine & International Health · Ghana

The effectiveness of low-cost irrigation methods (drip irrigation kits, furrow irrigation, and watering cans) in reducing contamination of lettuce irrigated with untreated wastewater in urban farming in Ghana was assessed. Analysis of 396 lettuce, 72 soil, 15 poultry manure, and 32 water samples revealed that lettuce irrigated with drip irrigation kits had the lowest contamination levels, with an average of 4 log units per 100g fewer thermotolerant coliforms than those irrigated with watering cans. However, drip kits often clogged, required lower crop densities, and restricted other routine farm activities.

F Ortega Sastriques, Rosa Orellana Gallego · Revista ciencias técnicas agropecuarias · Global

In many cities, potable water is expensive, and its availability is limited and will decrease in the future. Urban agriculture is an aspect to consider in this context.

F Ortega Sastriques, Rosa Orellana Gallego · · Global

Due to high prices and limited availability of drinking water in many cities, urban agriculture will require the use of alternative water sources. Groundwater and surface currents near cities are typically polluted, and this paper points out aspects to consider for safe irrigation using sewage water.

Fiona Yeudall, Renée Sebastian, Donald C. Cole, Selahadin Ibrahim, A. Lubowa, Joyce K. Kikafunda · Food and Nutrition Bulletin · Uganda (Kampala)

A cross-sectional survey of 296 households in Kampala, Uganda, examined the impact of sociodemographic and farming variables on household food security and nutritional security of children aged 2-5 years. Household food security score was significantly positively correlated with the number of tropical livestock units, dietary diversity, percentage of energy from animal-source foods, and weight-for-age z-score. Consumption of animal-source food was negatively associated with C-reactive protein level, which was negatively associated with hemoglobin level, and hemoglobin was positively associated with weight-for-age z-score.

Stephanie Buechler, Gayathri Devi Mekala, B. Keraita · Victoria University Research Repository (Victoria University) · Global

This 2006 global study from Victoria University discusses wastewater use in urban and peri-urban agriculture for crop production and aquaculture, noting its role in generating livelihoods and providing cheap produce. However, the study emphasizes that clear policy guidelines and careful research are needed to prevent potential negative impacts on human health and the environment from wastewater reuse.

Jonathan Kingsley, Mardie Townsend · Urban Policy and Research · Australia (Melbourne)

A small qualitative study of members of the 'Dig In' community garden in Melbourne, Australia, explored the social capital benefits of urban community gardens. The study found that garden membership offers benefits such as increased social cohesion, social support, and social connections. However, these benefits do not necessarily extend beyond the garden setting, especially in the early stages of development.

Barbara Matthys, Penelope Vounatsou, Giovanna Raso, Andres B. Tschannen, EMMANUEL GBEDE BECKET, Laura Gosoniu, Guéladio Cissé, Marcel Tanner, ELIÉZER K. N’GORAN, Jürg Utzinger · American Journal of Tropical Medicine and Hygiene · Côte d'Ivoire

This study investigated malaria risk factors in urban farming communities in a medium-sized town in Côte d'Ivoire, conducting two cross-sectional surveys among 112 households across six agricultural zones. The overall prevalence of Plasmodium falciparum was 32.1%. Findings indicate that specific crop systems and agricultural practices may increase the risk of malaria in urban settings of tropical Africa.

Kigumure Buhindwa · Zenodo (CERN European Organization for Nuclear Research) · Rwanda (Kigali)

This study investigated malaria prevention activities in Kigali community gardens, Rwanda, through Community Health Volunteers (CHVs). A mixed-method approach, combining qualitative interviews and quantitative surveys, collected data on CHV activities and health outcomes. CHVs conducted weekly health screenings, reaching approximately 80% of the targeted population, and malaria prevalence dropped by 25% after six months. However, challenges included limited resources and inadequate training for CHVs, indicating that sustained support and additional training are necessary for long-term impact.