Research & reports

Doreen N. Meso, Enos W. Wambu, Gelas Simiyu, Shem M. Mwasi, Thomas Munyao · Discover Environment · Kenya (Kakamega Town)

This study assessed heavy metal pollution in agricultural soils, water, and pumpkin leaves from 21 sites across three zones in peri-urban Kakamega Town, Kenya. It found cadmium pollution in all water samples, and lead and nickel pollution in sections of soil and leafy vegetable samples. Lead pollution was linked to vehicular emissions near the town center, while cadmium enrichment in informal settlements implicated inadequate waste management. Sequential extraction showed 31–35% of soil cadmium was in exchangeable fractions, posing a risk of bioavailability, highlighting persistent heavy metal contamination with implications for public health, environmental sustainability, and agricultural productivity.

A. Bayat, H. Govera · Suid-Afrikaanse tydskrif vir landbouvoorligting/South African journal of agricultural extension · South Africa (Cape Town)

This study descriptively investigated the vulnerability to shocks and pressures of the Philippi Horticultural Area (PHA), a key urban food-producing region in Cape Town, South Africa. Data were collected through surveys with stakeholders from government, the private sector, NGOs, private individuals, and informal settlers. Key findings revealed insufficient governance commitment, a lack of multi-stakeholder collaboration, and the growing threat of urban development on agricultural land.

Tinawaen Tambol, Emmanuel Kanchebe Derbile, Moussa Soulé · Scientific Reports · Niger

This study investigated peri-urban farming systems in West African Sahel cities. A mixed-method research design, including field and household surveys of 142 peri-urban smallholder farmers, was employed. Results showed that biopesticides/crop and pest management were the most used Climate-Smart Agriculture Technologies (CSAT) in dry-season farming (p = .002). Other technologies included fertilizer micro-dose, organic manure and compost application, flood-tolerant improved varieties, and green energy-based irrigation.

Haofan Xu, Peng Hu, Hailong Wang, Peter Croot, Zhiwen Li, Cheng Li, Shaowen Xie, Hongyi Zhou, Chaosheng Zhang · Environmental Pollution · China

This study in Gaoming county, China, integrated PMF and K-means clustering to identify sources and contamination patterns of 8 potentially toxic elements (PTEs) in peri-urban agricultural soils. Average concentrations of PTEs were reported, with PMF identifying geogenic, industrial/traffic-related, and agricultural sources. The highest PTE concentrations were found in urbanized zones, confirming significant human impact and underscoring the dual influences of agriculture and urbanization on PTE contamination.

Inger‐Lise Saglie · · Norway

This chapter presents the development of public policies and the main actors in urban agriculture in three Norwegian cities: Oslo, Bergen, and Trondheim. While showing common traits in institutionalization, differences exist in the role of voluntary groups, bottom-up versus top-down processes, networking, relationship to peri-urban agriculture, and implementation in plans. Oslo's approach is politically driven with traditional participatory methods, developing urban agriculture as a social activity and professional food production. In Bergen, the voluntary sector actively co-creates policy and runs a competence center. Trondheim's policy is co-produced annually with growers based on their experiences, with a strong connection to professional agriculture, and has consciously chosen not to develop specific strategies for urban agriculture.

A. K. Ahmed, Rasheed Abiodun KURANGA, Oluwadara Latifat ISOLA-MUYIDEEN · International Journal of Research and Innovation in Social Science · Nigeria (Ilorin)

This study assessed the sustainability of environmental management practices among peri-urban rice farmers in Ilorin, Nigeria, using a sustainability index. It found that many practices were less sustainable, with 69.51% of farmers relying on chemical sprays and 69.85% using chemical fertilizers. The overall Environmental Management Practices Sustainability Index (EMPSI) for all farmers was 0.492, placing them in the moderately sustainable category.

Ulrike Bayr, Svein Olav Krøgli, Sebastian Eiter · Urban forestry & urban greening · Norway (Bergen)

This study ranked urban and peri-urban farmland areas in Norway based on their suitability for urban agriculture (UA) and identified opportunities for extending UA to currently unused farmland. Through collaboration with urban farmers, four key themes and eleven criteria were identified and weighted for on-farm and off-farm sales scenarios. A GIS-based multi-criteria decision analysis (MCDA) using TOPSIS was performed on 1x1 km grid cells. In the City of Bergen, 15.3% (on-farm) and 14% (off-farm) of the total farmland was both unused and highly suitable for UA, compared to 2.8% (on-farm) and 2.4% (off-farm) in Oslo.

B. Constance, Adrienne Grêt‐Regamey, Andoniaina Valérie Andriamanga, Dominic A. Martin, Nicolas Salliou · Ecosystems and People · Madagascar (Antananarivo)

This study investigated the motivations and consequences of soil extraction for brick-making in Antananarivo, Madagascar, through 263 interviews with farmers and brick-makers. Findings indicate soil extraction serves as a climate change adaptation strategy, leading to a decline in flood regulation capacity but also a shift to more resilient cultivation practices like raised gardens. Climate change, with shorter rainy seasons, intensifies soil extraction.

Yaw Agyeman Boafo, Bob Offei Manteaw, Philip Antwi‐Agyei, Portia Adade-Williams, Nana Ama Browne Klutse, Kofi Asare, Doreen Larkailey Lartey, Bernard Ayittiah · Discover Cities · Ghana

This study assesses future climate risks and sectoral vulnerabilities in Ghana's Cape Coast Metropolis using meteorological data and downscaled climate projections through 2100. Findings indicate significant warming trends and heightened rainfall variability, which render peri-urban agriculture highly susceptible to crop failure, fishery declines, and water scarcity. Informal economic sectors are also at risk from infrastructure damage and income impacts.

Erwin Wisnubroto, Maurus Barrawiadi · JURNAL PERTANIAN · Indonesia (Batu)

This study in Batu City, Indonesia, evaluated the sustainability of agricultural production in three sub-districts—Batu, Junrejo, and Bumiaji—using the PROMETHEE method. Data were collected through FGDs, interviews with key stakeholders, and secondary statistical sources, analyzing five sustainability indicators including horticultural vegetables, biopharmaceutical crops, ornamental plants, fruit crops, and small farmer labor availability. The results showed that Bumiaji sub-district had the highest net flow value for sustainability, while Batu sub-district showed declining performance.

Marie Claire Uwase, Jean de Dieu Uwimana · Zenodo (CERN European Organization for Nuclear Research) · Rwanda (Kigali)

This article develops a theoretical framework to analyze how digital land registries in Rwanda, specifically in Kigali's peri-urban areas, mediate women's access to formal agricultural credit. The framework posits that despite formal legal equality, digitization can paradoxically solidify existing patriarchal biases within credit assessment algorithms. It reveals that digital land governance is not a neutral solution for gendered credit gaps and can entrench barriers to women's financial inclusion in peri-urban agriculture by systematically undervaluing women's communal land use practices as collateral.

Westone Hamwata, Mwendalubi Hazyondo, Victor Daka, Mbanga Muleba, Nzooma M. Shimaponda-Mataa · BMJ Open · Zambia

A cross-sectional study in urban and periurban areas of Ndola district, Zambia, assessed malaria vector behavior and insecticide resistance. Urban agriculture practices created highly productive mosquito breeding sites like irrigation trenches and garden ponds, where Anopheles funestus s.s and Anopheles gambiae s.s coexisted. Anopheles gambiae s.s showed high resistance to pyrethroids, carbamates, and organochlorines, indicating that urban agricultural practices increase the risk of sustaining malaria transmission year-round.

Durrotun Nafisah, Ika Purnamasari, Isnawati Isnawati, Zulfin Rachma Mufidah · Journal of Community Service and Empowerment · Indonesia

An ecopreneurship-based urban farming assistance program was implemented with the Karya Jaya 4 Farmers Group in Deket District, Indonesia, where agricultural land conversion reduced rice and fish production. The program provided training on hydroponic aquaponic systems and supported the construction of five backyard systems. This initiative increased participants' knowledge and skills, achieved an 85% success rate in system management, and contributed to increased household food production, income, and food security.

Peter Nixon, Anu Ramaswami · Environmental Research Letters · United States

This paper quantifies environmental benefits and disbenefits from various vegetable farming localization scenarios across 378 US metropolitan areas. While scenarios found few significant land constraints and revealed net environmental benefits to groundwater overdraft and fertilizer-related PM2.5 emissions in 11%–55% of metros, the model also revealed where relocalization would exacerbate existing environmental vulnerabilities. This indicates potential environmental tradeoffs depending on the location.

· The MIT Press eBooks · Global

This book examines community farms in Latin America, Australia, and China, highlighting tensions between local identities and global transformation. It finds that while industrial expansion in export agribusiness generates macroeconomic benefits, it incurs micro-level costs such as the replacement of peri-urban farms by plantations, loss of biodiversity, and groundwater contamination from pesticides and fertilizers. The study suggests that food system intermediaries are crucial in connecting rural migrants with urban farms and resources.

Jan Szturc, Tomáš Mašíček, Adéla Navrátilová, Jana Kozlovský Dufková · Journal of Agriculture Food Systems and Community Development · Europe

This study explored the production potential of urban farming in Olomouc, Czech Republic, using spatial analysis to identify suitable spaces. Results indicated that 408.04 hectares of currently unused land could be repurposed for urban farming, yielding 7,099.9 tons of vegetables. This production could meet 42.68% of the city's total vegetable demand, though detailed analysis is always necessary for specific areas due to varying potential.

José Arturo Méndez Espinoza, Martín Neri-Suárez, Karen Italia Ruiz-López · LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) · Mexico (Puebla)

A case study in Cuautlancingo, Puebla, Mexico, revealed an adverse context for the reproduction of peri-urban family farming. Urban expansion, neoliberal policies, and real-estate speculation have displaced traditional agricultural practices and fostered land-tenure changes. Between 2005 and 2021, over 40% of agricultural areas were lost due to industrial and housing growth. The study concludes that without effective protection and territorial planning, peri-urban agriculture in Cuautlancingo is at risk of disappearing under urban and industrial pressures, with implications for local food security.

Javier Rodrigo-Ilarri, Claudia P. Romero-Hernández, Sergio Salazar-Galán, María-Elena Rodrigo-Clavero · Sustainability · Spain (Valencia)

This article analyzes the impact of urban sprawl on the Valencia Plain aquifer system from 1990 to 2018 using the Weighted Environmental Index (WEI). Results show urban surfaces expanded by 70% and rainfed agricultural areas declined by over 59%, leading to a 9.2% reduction in environmental value (WEI decreased from 44.80 to 40.68). These changes threaten ecosystem sustainability and reduce the capacity to deliver ecosystem services.

Yasin Mohamed Ibrahim · Turkish Journal of Agriculture - Food Science and Technology · Somalia (Mogadishu)

A study in Mogadishu, Somalia, used snowball sampling to assess constraints and opportunities for urban horticulture. It found that temperature, wind, pests, diseases, and limited irrigation water significantly restrict production, particularly for open-field farmers who face high irrigation demands, pest infestations, and low-quality yields unattractive to buyers. While greenhouses offer some protection, plastic greenhouses specifically suffer from inadequate gutter height and poor ventilation, requiring farmers to use primitive methods to combat extreme temperatures.

Johannes Bhanye, Abraham R. Matamanda, Ruvimbo Shayamunda · Discover Global Society · Zimbabwe

In Lydiate informal settlement in peri-urban Zimbabwe, Malawian migrants mobilize insurgent practices, including informal land seizures, spiritual claims, and communal strategies, to access land for farming. Access to land for urban and peri-urban farming remains a significant hurdle, especially for marginalized migrants. Migrants invoke divine ownership narratives, Nyau cult practices, and witchcraft deterrence as tactical tools for defending seized land.

F. Xavier Medina, José Antonio Vázquez–Medina, Marco Covarrubias · Edward Elgar Publishing eBooks · Mexico (Mexico City)

This chapter discusses the factors linking food production, social and environmental problems, and future challenges in the chinampas of Xochimilco, a UNESCO World Heritage wetland area in Mexico City's peri-urban zone. It examines strategies implemented by stakeholders and their effects to envision future scenarios for sustainable food systems. The insularity of the chinampas imposes a particular character on agri-food production and the life of inhabitants, highlighting existing social and environmental problems.

Tesfay, Hailay, Machethe, Charles · AgEcon Search (University of Minnesota, USA) · Ethiopia (Tigray)

This paper examines the effect of Ethiopia's land certification program on the land tenure security of rural and peri-urban farming households in the Tigray region. Analyzing cross-sectional data from 500 respondents using logistic regression, the study showed that the program's effect is significantly influenced by the geographic location of farm households. The program produced better results for rural farmers than for peri-urban farmers, with certified households in rural areas being less likely to experience a change in their land tenure (less secure land tenure) compared to certified farmers in peri-urban areas.

James S. Kaba, Joseph Mutungi, Gladys Rotich · International Journal of Research and Innovation in Social Science · Kenya

This study examined the implications of urbanization-triggered industrial development on food security in Kiambu County, Kenya, neighboring Nairobi. Through mixed qualitative and survey-based data collection and analysis from 400 respondents including farmers, agricultural workers, urban planners, and government officials, the study found an 85% increase in farmland conversion to industries over the last 20 years. This industrialization contributed to a decline in food production, as reported by 65% of respondents who left farming for industrial jobs. Land-use transformations have resulted in fewer farms involved in agriculture and the replacement of old food systems.

Mokhdum Azam Mashrafi, Mokhdum Azam Mashrafi · Zenodo (CERN European Organization for Nuclear Research) · Global

This project aims to establish an integrated, eco-friendly system for fish culture, vegetable cultivation, fruit gardening, and animal farming within and around cities, towns, villages, highways, and agricultural zones. The system utilizes drain-type artificial lakes, fenced culture units, water recycling mechanisms, climate-control methods, and energy-efficient technologies to ensure high production even in challenging environments. The project emphasizes food security, urban sustainability, youth employment, environmental protection, and efficient land use.

Andrés Barsky · · Latin America

This chapter assesses the current state of threats to and measures to protect periurban agriculture around cities in Latin America. It highlights the social and spatial vulnerability of peri-urban agriculture and its increasing appearance on Latin American food and urbanistic agendas. Examples of strategies for the concrete management of peri-urban agriculture in Latin American cities include the institutionalization of relevant organizations, the enactment of specific laws, the implementation of programs for small-scale production, and the generation of territorial intervention instruments. The conclusion argues for the need to generate new public intervention instruments to preserve and design spaces of high productive and environmental value in periurban areas.