Research & reports

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.

Adolphe Monkiédjé, Michael Spiteller, D. Fotio, Premasis Sukul · Journal of Environmental Quality · Cameroon (Yaounde)

This study evaluated the effect of different land uses on soil health indicators in peri-urban agricultural areas of Yaounde, Cameroon, by comparing five tilled sites with native forest land. While most cropped land showed higher levels of many soil health indicators, cultivation of crops like corn and sugarcane significantly impacted native soil quality. Specifically, phenol oxidase, microbial biomass C/organic C, and microbial biomass C/microbial biomass P were negatively affected, indicating negative management impacts on soil health.

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.

Alice J. Hovorka, Damell Smith, R. van Veenhuizen · · Global

This article argues that a gendered perspective on urban food security is essential to understand dynamics shaping food production and marketing in urban centers. It highlights that failing to explore women's distinct roles risks leaving gender inequities and food supply hindrances unaddressed, countering the invisibility of women's work often assumed as automatic domestic duties. The article emphasizes women's significant role in domestic food supply, even in societies with minimal household food production, citing examples like Latin American women organizing to address urban hunger.

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.

Astrid Mendez, Paulo Cseri Ricardo, P Jeny Pérez, Callejas Hernández, Osvaldo Campos · DOAJ (DOAJ: Directory of Open Access Journals) · Cuba

This introductory study in Arroyo Naranjo municipality, Cuba, examined the use of Luyanó effluent wastewater for irrigation in urban agriculture. The wastewater was classified as low contamination based on BOD5 and COD values and posed no toxic contamination risk to soil or environment. However, it should not be used without prior treatment for direct consumption crops due to its microbial load. Experimental plots with carrot, radish, and marigold showed high agricultural yields, and radish harvests had no bacterial contamination.

Paule Moustier, George Danso · Agritrop (Cirad) · Global

This report discusses urban agriculture's role in addressing social, economic, and environmental challenges of rapid urban growth in developing countries. It notes that while urban agriculture attracts attention, its viability and need for political support remain debated. The report highlights arguments against targeting scarce public resources towards urban agriculture, citing high land costs in urban areas and insufficient evidence of its economic viability.

HU Yue-xiao · Nongye xiandaihua yanjiu · Global

This study on the industry orientation of urban agriculture, including trade, marketing, business model, and organizing orientations, identified problems such as industry parking, blurred functional orientation, and a lack of overall planning during urban agriculture orienting programs.

Emma Lea, Jodi Phillips, Madeleine Ward, Anthony Worsley · Ecology of Food and Nutrition · Australia (Victoria)

This qualitative study interviewed 20 consumers and 12 farmers in Victoria, Australia, to examine their knowledge, perceived benefits, and barriers regarding Community Supported Agriculture (CSA). The study found that knowledge of CSA was limited among both groups. Consumers perceived fresh food as a benefit but cited lack of produce choice as a barrier, while farmers saw financial benefits but were concerned about risk-sharing.

Y. Arocha, B. Piñol, B. Picornell, R. Almeida, P. Jones, E. Boa · Plant Pathology · Cuba

A 2005 survey in the 'Alamar' organoponic in Havana province, Cuba, observed typical phytoplasma-symptoms of little leaf and witches' broom in all basil (Ocimum basilicum) plants. DNA analysis of leaf samples from 27 symptomatic plants confirmed an association with a 16SrI group phytoplasma (Aster Yellows; 'Candidatus Phytoplasma asteris'). This report from Cuba is the first record of this new disease, for which the name basil little leaf is proposed.

Mengjie Xu · Urban Problems · Global

This paper summarizes the types and characteristics of urban agriculture (UA) in less developed countries (LDCs), distinguishing it from UA in developed countries. It elucidates both the positive and negative effects of UA in LDCs, including impediments arising from its negative impacts. The study discusses the necessity of developing UA in LDCs and details measures to regulate its development, highlighting governance challenges.

Alice Franck · Revue internationale des études du développement · Sudan

This study of market gardeners in Khartoum, Sudan, reveals limitations in the integrating capacity of urban agriculture. Uncontrolled urbanization in the capital creates intense competition for property, restricting the potential integration of farm-workers in the downtown area. This activity is strictly commercial and primarily carried out by a migrant population.

Nkawkaw Afriyie, Kofi Adziri, Yaw Asare, Amoako Gyamfi · Zenodo (CERN European Organization for Nuclear Research) · Ghana

A thematic analysis synthesized existing studies on community gardening impact measurement in Accra, Ghana, focusing on methodologies. While varied methods were reported, a notable theme emerged regarding the mixed results and challenges in accurately gauging the impact of community gardening on urban food security indicators, such as vegetable consumption rates among participants. This review underscores the importance of empirical data for understanding the effectiveness of urban agricultural interventions, but highlights methodological inconsistencies.

Levon T. Esters, Blannie E. Bowen · Journal of Agricultural Education · Global

This study investigated factors influencing career choices among graduates of an urban agricultural education program. While former students identified parents and friends as influential, and cited various reasons for their career paths, a discriminant analysis model could not distinguish between those who chose agricultural careers and those who did not after completing the secondary agricultural program.

Troy D. Glover · Leisure Sciences · Global

This 2004 global narrative inquiry explored a community garden as a social context for social capital among gardeners. The study found that social capital can be both a benefit and a cost, depending on an individual's position within the social network. This suggests a potential for inequitable or corrupt application of social capital within community garden groups.

Rocío García Bustamante, John Butterworth, M. Flierman, Daniel Herbas, Melvin Hollander, S. van der Meer, P. Ravenstijn, Magaly Reynaga, Gustavo Zurita · · Bolivia (Tarata)

In 2002, Tarata, Cochabamba, Bolivia, experienced violent conflicts over the right to use water from the Laka Laka dam for urban agriculture. The dam was intended for large-scale irrigation and domestic use, but not urban productive uses, leading to disputes when the urban population sought water for homestead cultivation. Although 5% of the reservoir yield was allocated for urban supply, its poor quality prevented drinking use, prompting the community to organize for its use in irrigating small plots, despite opposition from irrigation farmers.

Martin Krauß, J. Moering, Walther Amelung · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · Global

This study aimed to assess whether local soil contamination contributes to PCB contamination in apples (Malus domestica Borkh.) at an allotment garden site, in addition to background atmospheric deposition. The importance of the soil-air-plant pathway for persistent organic pollutants like PCBs has been rarely studied, and it is unknown if volatilization from contaminated soils or deposition of contaminated soil dust is a significant source compared to background deposition. The research sought to clarify this potential contamination route for apples.

Brian Halweil · · Global

This book points out that the long-distance food system consumes staggering amounts of fuel, generates greenhouse gases, and compromises food security. Since 1961, the tonnage of food shipped between nations has grown fourfold, with food in the United States typically traveling 1,500 to 2,500 miles from farm to plate. While this system often runs roughshod over local cuisines, varieties, and agriculture, a local-foods movement is beginning to emerge globally.

F.P. Huibers, O. Moscoso, Álvaro Ocampo Durán, J.B. van Lier · CABI Publishing eBooks · Bolivia

A study examining wastewater use in urban and peri-urban agriculture in Cochabamba, Bolivia. Both vegetable and fodder crops are irrigated with polluted water — diluted or partly treated municipal and industrial sewage — containing high concentrations of pathogens, heavy metals, and salts. In the downstream La Mayca area, where farmers have an agreement with the municipal water and sewerage company, soil degradation has forced them to increasingly replace vegetable crops with more salt-tolerant fodder crops. In other areas around the city, cultivators deny using wastewater and point to nearby wells as their water source, but many of these wells are likely also polluted and do not yield enough water for the irrigated area they serve. Farmers report no specific health problems related to using polluted water, which contradicts reports from local health workers. Because surface water flow and rainfall are low while industrial pollution is high and wastewater treatment capacity is limited, most of the water available to farmers is of poor quality. Options identified for improvement include reducing industrial pollution, increasing treatment capacity, and adopting integrated water management that blends good-quality groundwater with wastewater — but strong traditional water rights, lack of urban planning, and weak institutions are cited as constraints on improving wastewater management in Cochabamba.

G. B. Luilo, Othman C. Othman · Journal de Physique IV (Proceedings) · Tanzania (Dar es Salaam)

This study measured heavy metal levels (cadmium, manganese, lead, and zinc) in Cynodon grasses near roads in Dar es Salaam City, Tanzania. Mean levels of lead and zinc varied exponentially with distance from the road up to 15m and correlated with average daily traffic, suggesting vehicular sources. For public health reasons, it is recommended that pasture grasses in road vicinities not be used for foraging dairy cattle and goats.

Bernard Keraita, Pay Drechsel, Philip Amoah · Environment and Urbanization · Ghana (Kumasi)

This study in Kumasi, Ghana, investigated the influence of urban wastewater on stream water quality and peri-urban agriculture through interviews and water quality assessments. It found that population increase and underinvestment in sanitation facilities led to large volumes of untreated wastewater entering streams. High levels of faecal coliform were recorded in the city's streams, downstream areas, and on vegetables sold in Kumasi’s markets due to contaminated wastewater.

Jeroen H. J. Ensink, Wim van der Hoek, Yutaka Matsuno, Sarfraz Munir, Muhammad Rizwan Aslam · CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research) · Pakistan

The use of untreated wastewater for irrigation is widespread in Pakistan's peri-urban agriculture, driven by water scarcity and lack of treatment funds. This practice has led to an uncontrolled expansion of wastewater use. The paper emphasizes the need to document this practice to find improvement methods within the financial constraints of low-income countries.

Maurizio Tiepolo · PORTO Publications Open Repository TOrino (Politecnico di Torino) · Niger

This paper investigates whether urbanization in Niamey, Niger, generates or aggravates urban food insecurity by examining agro-pastoral production, food demand, and buying power. It found that Niamey's high rate of urban growth has increased food insecurity for its inhabitants. This insecurity is attributed to low productivity of peri-urban agriculture, insufficient food influxes, rising prices, extreme poverty, and a nutrient-poor diet, with current measures failing to address root causes like land tenure uncertainty.

Charles W. Howe · Environment and Development Economics · Global

This study noted that in inappropriate legal and administrative settings, groundwater becomes an open-access resource, leading to excessive externalities. Competition between urban and agricultural sectors for limited groundwater can lead to crises if appropriate policy instruments are not used to mediate it. For non-renewable groundwater stocks, without economic and demographic development planned according to long-term criteria, there is a risk of overly rapid exploitation, unsustainable population levels, and inappropriate infrastructure investment.

Ausaf-ur Rahman, Mohammad Ait Kadi, Johan Rockström · Water Science & Technology · Global

A synthesis paper from a 2002 workshop reports that competing demand for water between agriculture and urban users is generating severe stress on water resources, with virtual water trade (importing food instead of pursuing self-sufficiency, to conserve real water resources) and water reuse (irrigation with treated urban wastewater) emerging as the two dominant proposed responses. It states that virtual water trade carries serious political and economic risks, with one proposed remedy being an international virtual water trading council.