Research & reports

Elke Rogge, Eva Kerselaers, Charlotte Prové · · Europe

This study explores opportunities and challenges for peri-urban agriculture, examining envisioning processes in Ghent and Kortrijk, Belgium, initiated by local authorities. Results indicate that pressure on farmland is a key issue in both contexts. Multifunctionality is complex in practice and governance, and successful envisioning processes require clear objectives, defined study areas, policy support, strong leadership, and reliable data.

Laure‐Elise Ruoso, R. Plant, Brent Jacobs, Pierre Maurel · · Australia (Western Sydney)

This study, based on in-depth interviews with farmers in peri-urban Sydney, Australia, examines how changes in these areas impact farmers' place identity and decision-making. It analyzes how increasing urban development, land subdivision, rising land values, and environmental regulations threaten farming activities. The findings indicate that these factors influence farmers' practices, business management, and decisions to continue or relocate peri-urban farming.

E.N. Sabiiti, Constantine Bakyusa Katongole · Water science and technology library · Uganda

Wakiso district, the peri-urban area surrounding Kampala, Uganda's capital city (population about 1.51 million), ranks first nationally in poultry production and second in pig production, accounting for 7.4% and 6.3% of the national chicken and pig populations respectively. The chapter finds that agricultural land in these peri-urban areas is increasingly at risk from urban encroachment, driven by population growth, distorted land values, a construction boom, and expanding recreation and leisure facilities competing with farming for land, which is likely to adversely affect the city's food security.

Luca Salvati · · Europe

Land-use change in southern Europe was assessed through a case study of the Athens metropolitan region, Greece, analyzing the spatial distribution of built-up areas, cropland and forests together with demographic and socioeconomic indicators across alternating expansion waves over the past 50 years. Per-capita built-up area was higher during the "dispersed" urbanization wave than the "compact" one, but cropland was the land-use class most vulnerable to urbanization, with a high rate of conversion from forest to cropland — later abandoned and finally developed — observed since the early 1990s. This process was linked to land fragmentation and soil degradation driven by illegal housing and real estate speculation.

Arti Bhatia, Shivdhar Singh, Amit Kumar · Water Environment Research · India (Delhi)

A study in Delhi, India, investigated heavy metal contamination (cadmium, lead, zinc, copper) in irrigation water, soil, and vegetables from four peri-urban and one wholesale site. Most samples from peri-urban areas exceeded safe limits for lead and cadmium. Vegetables from the wholesale market showed only higher lead concentrations. Among peri-urban vegetables, only okra exceeded the safe limit for cadmium, while several wholesale vegetables (potato, coriander, chilies, pea, carrot) exceeded the limit for lead regarding health risk.

Christopher Bryant, Ghalia Chahine · Geographical Research · Canada (Montreal)

This 2015 case study from the Montreal Region, Canada, analyzed an action research project initiated in 2008 to reduce the vulnerability of peri-urban agriculture. Despite initiatives since the mid-1960s, significant pressures continue to increase the vulnerability of peri-urban farming, with farmland often removed from agricultural reserves. The project in Senneville involved farmers, non-farm actors, and municipal presentations over three years, aiming to integrate conservation and leisure activities.

Amandine Joly · · France

This study characterized and strategically analyzed urban agriculture for the IETI external planning and environment consulting firm in Île-de-France, France. The analysis aimed to help IETI position itself commercially in urban agriculture, identifying both the benefits and the obstacles the firm might encounter. The study also briefly discussed the various scales of urban agriculture's integration into the territory and its advantages for the consulting firm.

Sarah Oloo Masawa, George G. Wagah, Reuben Oyoo Mosi · International Journal of Physical and Social Sciences · Kenya

This 2011 study in Bondo Sub County, Kenya, assessed the integration of urban and peri-urban agriculture (UPUagr) into urban planning, using a descriptive survey design with 368 households and 248 traders. A major challenge identified was the lack of supportive local policy and legal frameworks for UPUagr, and problems with its integration into broader urban development plans. The study found that UPUagr complemented rural agriculture and increased food system efficiency.

Martin Dyer, Richard M. Mills, Beatrice Conradie, Jenifer Piesse · Open University of Cape Town (University of Cape Town) · South Africa (Cape Town)

This paper investigates the efficiency relationships between inputs and outputs of urban micro-farms in two Cape Town townships, Nyanga and Khayelitsha. Data Envelopment Analysis (DEA) applied to 33 producers supplying a social enterprise box scheme revealed an average overall efficiency of 72.4%. Overall efficiency was negatively correlated with land holdings and the use of compost and seedlings, indicating efficiency losses with greater input quantities. Furthermore, it was not shown that mulching or operator experience increases profitability.

Achamyeleh Gashu Adam · · Ethiopia

A study assessed the process of built-up property formation in Ethiopia's peri-urban areas. Through analysis of survey results and a review of relevant literature, the study elucidated the processes of peri-urbanization and new property development. It demonstrated that both formal (legal) and informal methods are equally important in converting peri-urban agricultural lands into urban built-up non-agricultural properties. This process creates intense competition for land between agriculture and non-agriculture, leading to the emergence of new property rights and the dissolution of existing traditional rights.

Gauthier Dobigny, Madougou Garba, Caroline Tatard, Anne Loiseau, Maxime Galan, Ibrahima Kadaouré, Jean‐Pierre Rossi, Mathieu Picardeau, Eric Bertherat · PLoS neglected tropical diseases · Niger

An extensive survey of urban rodents in Niamey, Niger, investigated the presence and distribution of rodent-borne pathogenic Leptospira species. Leptospires were not detected in the core city, but L. kirschneri was found in Arvicanthis niloticus and Cricetomys gambianus, rodent species restricted to irrigated cultures within the city. This study indicates the importance of market gardening in the maintenance and circulation of leptospirosis within Sahelian cities.

Sarah James · Area · Australia (Sydney)

This paper argues that small-scale family farmers on Sydney's urban fringe are directly connected to and reliant on the mainstream food system for their economic viability. It highlights that a localized focus on threats and solutions risks neglecting the impact of supermarket power and consumer choice on these producers. The study emphasizes the need to examine the continuing connection between the mainstream system and 'local', small-scale producers to achieve food system change.

Emmanuel Yennumi Wandaat, Joseph Xorse Kugbe · Asian Journal of Agriculture and Food Sciences · Ghana

A study on vegetable production in Ghana's Tano South District surveyed 132 urban farmers and 5 stakeholders. Farmers relied solely on chemical pesticides for pest control and lacked in-depth knowledge of Integrated Pest Management (IPM). Inappropriate handling and non-use of protective clothing led farmers to report health issues like dizziness, skin irritation, and nausea, while indiscriminate spraying resulted in pesticide residues posing serious health risks to consumers and the environment.

Leonia John Raphael · Tanzania Journal for Population studies and Development · Tanzania (Dar es Salaam)

A 2015 study in Dar es Salaam, Tanzania, found that extreme climatic changes, including rainfall and temperature, have adversely affected peri-urban agricultural productivity and vegetation cover. Excessive rains lead to the destruction of urban gardens, vegetation, property, and loss of livelihoods for urban dwellers, 87% of whom are rural migrants. This highlights significant risks for urban communities dependent on land resources in rapidly growing cities.

Rocío Pérez-Campaña · European Planning Studies · Spain

This research analyzed land-use transformations of peri-urban agricultural deltas and vegas in Andalucía, Spain, focusing on medium-sized cities between 1956 and 2007. It also assessed their consideration in regional spatial planning. The findings indicate that these landscapes are changing land use and sometimes disappearing, receiving meagre attention and vague consideration in spatial planning.

Giuseppe Cinà, Francesco Di Iacovo · PORTO Publications Open Repository TOrino (Politecnico di Torino) · Italy

This paper examines urban and peri-urban agriculture (UPA) in Italy, identifying challenges in its planning, including the traditional exclusion of agricultural areas from territorial planning and the lack of local agricultural policy. The study highlights a disconnect between top-down policies and bottom-up practices, noting that numerous autonomous initiatives have emerged due to insufficient regional and local planning solutions. The authors conclude that overcoming the limitations of the top-down planning system, particularly in governance and inclusiveness, is a primary challenge for Italy.

Pay Drechsel, Keraita, Bernard N. · CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research) · Global

A CGIAR (Consultative Group for International Agricultural Research) perspective piece on food and water challenges at the urban-rural interface amid global urbanization. It states that in low-income countries, investments in waste management and sanitation are not keeping pace with population growth, so the urban "return flow" of waste is not adequately managed. Where polluted water is used for irrigation to feed cities, food safety becomes a crucial component of food security. The piece explicitly states that urban and peri-urban farming systems — often run by the informal sector — are the systems most affected by this resource competition and pollution. It describes CGIAR's Water, Land and Ecosystems (WLE) research program as working at the interface of agriculture and sanitation to address these urbanization-related challenges and opportunities.

Nimoh Fred, Ohene-Yankyera Kwasi, Poku Kofi, Konradsen Flemming, Claude-François Robert · Journal of Development and Agricultural Economics · Ghana

A study in Ghana's Shai-Osudoku district investigated farmers' attitudes toward excreta reuse for peri-urban agriculture, surveying 400 randomly selected respondents. A majority of respondents disagreed that excreta are waste and were willing to use them as fertilizer. However, a majority also agreed that excreta can pose health risks, and perceptions on reuse differed among households.

Muhammad Zaman, Faqir Muhammad Anjum, Ali Asghar, Muhammad Sajid · · Pakistan

This study estimated organophosphate pesticide exposure from okra and brinjal consumption in urban populations of Punjab, Pakistan. 90 samples each of okra and brinjal were collected from peri-urban areas of Faisalabad, Multan, and Gujranwala and analyzed for chlorpyrifos, profenophos, and triazophos residues. Findings showed that 85 (47.22%) of the 180 samples were contaminated, and 15 (8.33%) samples had residue values higher than Maximum Residue Limits (MRLs).

Prem José Vazhacharickal, Sumita Gupta Gangopadhyay · Kobra (Universitätsbibliothek Kassel) · India

This paper examines urban and peri-urban agriculture (UPA) in India, focusing on wastewater irrigation and its associated human health risks. The study identifies potential health hazards for farmers, laborers, and consumers, including microbial pathogens and helminth (intestinal parasites). While UPA is presented as an option to address urban food demand, the paper emphasizes that "good practice UPA" requires integrated approaches and suitable risk reduction mechanisms to improve safety.

Pay Drechsel, Andrew Adam‐Bradford, Liqa Raschid-Sally, Drechsel, Pay, Adam-Bradford, A., Raschid-Sally, Liqa · AgEcon Search (University of Minnesota, USA) · Ghana

This chapter introduces urbanization in West Africa, particularly Ghana, the general role of urban agriculture, and the common use of polluted irrigation water. It focuses on irrigated smallholder vegetable production, reflecting on the key challenges, dynamics, and resilience of this farming system.

Taibat Lawanson, Olabode Orelaja, Michael Simire · African Journal of Science Technology Innovation and Development · Nigeria (Lagos)

This case study investigated the effects of climate change on agricultural activities in the Igbe Farming Community, Lagos, Nigeria, by surveying 161 farmers. The study found that most migrant farmers leased plots annually or biennially and made marginal profits of $200 to $350 per farming cycle. Erratic weather patterns and aggressive urban growth were major challenges, leading 48% of respondents to engage in informal enterprises.

Joseph Agossou, Léonard Afouda, Julien Didier Adédémy, Alphonse Noudamadjo, Catherine N’da Tido, Emanliikpon Sylvain Ahohoui, Pierre G. Tovihoudji, Farouk Mazou, Benjami Fayomi, Simon Akpona, Sikiratou Adéothy-Koumakpaï, B Ayivi · Environnement Risques & Sante · Benin (Parakou)

This study analyzed the bacteriological and parasitic load in wastewater and market garden products from five major production sites in Parakou, Benin, where farmers use wastewater for irrigation. High concentrations of fecal coliforms, Escherichia coli, Salmonella enterica, Shigella spp., Entamoeba coli, Giardia intestinalis cysts, and helminth eggs were found in irrigation water, vegetables, and farmers' stools. The use of wastewater resulted in high contamination of vegetables, particularly cabbage, large lettuce, and carrot leaves, by fecal coliforms, Salmonella enterica, and Escherichia coli.

Giuseppe Cinà · PORTO Publications Open Repository TOrino (Politecnico di Torino) · Italy

This paper examines Italian planning, highlighting an unresolved discrepancy between urban and agricultural policies due to a long-standing separation of urban and rural worlds. It outlines how this historical gap results in two inconsistent and low-effective policies. The paper discusses agricultural parks as an attempt to overcome this planning backwardness by integrating spatial planning and agricultural activity, documenting three Italian examples.

UM Dawaki, A. U. Dikko, SS Noma, U. Aliyu · Nigerian Journal of Basic and Applied Sciences · Nigeria

A study investigated the total, exchangeable, and soluble concentrations of heavy metals (Cu, Cr, Ni, Zn, Pb, Cd) in urban agricultural soils along three rivers (Challawa, Jakara, and Watari) in Kano, Nigeria. Cadmium concentrations at Jakara and Challawa exceeded maximum allowable concentrations in soils. Heavy metal concentrations were found to be significantly higher in areas irrigated with industrial and domestic sewage (Challawa and Jakara) compared to the control site (Watari).