Research & reports

Paule Olivia Akotto, Dorothée Boccanfuso, Marie-Ève Yergeau · Cahiers de recherche · Global

This exploratory review synthesizes 35 reports and articles published between 1980 and 2019 to assess the potential of urban and peri-urban agriculture (UPA) to build resilience against poverty, food insecurity, and environmental challenges in developing countries. The review found that UPA creates one job for every 50 to 100 individuals, but these jobs are generally seasonal, and market access remains a significant constraint for farmers.

Tanmoy Roy Tusher, Md. Eusuf Sarker, Sumaya Nasrin, Tapos Kormoker, Ram Proshad, Md. Saiful Islam, Shamim Al Mamun, A. R. M. Tareq · Toxin Reviews · Bangladesh

This study investigated toxic metal and PAH contamination in rooftop soils and vegetables (red amaranth, spinach) in urban and peri-urban Bangladesh. Urban rooftop soil and vegetables were highly contaminated with toxic metals and PAHs compared to peri-urban samples. Lead (Pb) and cadmium (Cd) concentrations in urban vegetables exceeded safe limits. However, health risk indices indicated that the levels of toxic metals and PAHs in urban rooftop vegetables would not pose carcinogenic or non-carcinogenic health risks for adults and children, deeming them safe for consumption.

Anna Ternell, Anders M. Nilsson, Björn Ohlén, Daniel Stenholm, Dag Bergsjö · Ecocycles · Global

This article assesses a scenario where urban farming initiatives become commercial and integrate with traditional agriculture and forestry, and analyzes the potential of public-private partnerships for multifunctional sustainable land use in peri-urban areas of Gothenburg, Sweden. Multifunctional sustainable land use, including diversified agriculture and forestry, is presented as a way to build resilience against climate change risks. Based on experiences from ongoing initiatives, the article identifies a large potential for such partnerships and presents a business model for long-term sustainability, developed within the Climate KIC Accelerator Project.

Thomas Gilardi · Geography Notebooks · Argentina

In the Bonearense region, urban expansion is encroaching on fertile plains, impacting territorial characteristics. While urban and peri-urban agriculture contributes to food sustenance for the AMBA population, it has not been sufficiently recognized for green area recovery, organic waste recycling, and wastewater management. Regional authorities have begun to acknowledge urban agriculture's role in combating urban poverty, but local economic development faces challenges in mediating food security and recreational services amidst pressures from urban real estate and agro-industrial production.

Brandon García Rodríguez, José Andrés Martínez Machado, Reinier Lop Herrera, Reina Dayamí Reyna Reyes · Revista Científica Agroecosistemas · Cuba (Cienfuegos)

A study on the use of Meliponinos was conducted in two meliponarios in Cienfuegos province, Cuba, specifically in San Fernando de Camarones and Pueblo Nuevo. Interviews with bee owners and community members identified factors affecting the sustainable development of Meliponicultura within Urban, Suburban, and Family Agriculture systems. Findings indicated a tendency for the Melipona beecheii population to increase in both municipalities, and common factors affecting bees were identified.

Razzaq Ahmed, Shaukat Khan, Khalida Mahmood, Ahsanullah · Irrigation and Drainage · Pakistan (Karachi)

Agricultural activities in the Gadap Basin, Karachi, Pakistan, showed a declining trend over two decades from 1997 to 2016. Analysis of 13 irrigation water samples revealed that water quality had severely degraded, with sodium concentration substantially increasing, especially near sand and gravel excavation sites. While 100% of samples were suitable for irrigation in 1997, this dropped to almost 50% by 2016, and SAR also decreased, indicating irrigation water quality degradation. Satellite imagery further showed a 60% decline and degradation of agricultural land in the basin during the same period.

Amit Umesh Paschapur, Chaitra G. Bhat · · Global

This article focuses on the history, types, major cultivated crops, advantages, success stories, and future scope of urban agriculture. Urban agriculture is the practice of cultivating, processing, and marketing food in and around urban localities, also encompassing animal husbandry, aquaculture, beekeeping, and horticulture. It contributes to providing fresh food, generating employment, recycling urban wastes, creating greenbelts, and strengthening cities' resilience to climate change.

Carolina Yacamán Ochoa, Daniel Ferrer Jiménez, Rafael Mata Olmo · Land · Global

This paper critically reviewed recent literature on Green Infrastructure (GI), highlighting a lack of references to peri-urban agriculture's role in GI planning. It emphasized peri-urban agriculture's positive contribution to local food supply and other services. Furthermore, the paper proposed a methodology to integrate practical GI planning in metropolitan regions to maximize the activation of traditional agricultural landscapes and improve landscape connectivity.

Fatiha Hakimi, Mohamed Brech · Zenodo (CERN European Organization for Nuclear Research) · Morocco

This study assessed the practices, potentials, and constraints of peri-urban agriculture (PUA) in Rabat Metropolis, Morocco, using field observation, interviews, and surveys with 50 randomly selected farmers. While PUA contributes to economic development, employment, and food supply, the study found significant legal constraints, including the absence of regulating laws and the obligation for some farmers to pay housing taxes. Technical constraints such as insufficient workforce, high labor costs, difficult access to irrigation water, and lack of training also hinder PUA growth.

Hayford Mensah Ayerakwa, Fred Mawunyo Dzanku, Daniel Bruce Sarpong · Agricultural and Food Economics · Ghana

Using a sample of 2,004 households in a small and a medium-sized city in Ghana, this study examined urban households' participation in agriculture by disentangling it according to the geography of production — urban versus rural areas — and its implications for food security. The analysis found no evidence that participation in agriculture in general was related to the food security of urban households in this sample. However, urbanites who produced food in both urban and rural areas had better food security in the medium-sized city.

Jessica Ann Diehl · Sustainability · Australia

Semi-structured interviews with 15 commercial urban farmers in Sydney, Australia, guided by questions based on the Sustainable Livelihoods Framework, examined how farmers access tangible and intangible resources through social networks within the urban food system. Three patterns emerged: urban-local, rural-local, and urban-global networks used in pursuit of sustainable livelihoods. The study concludes that land is only one driver, among many, of the sustainability of the local food system.

Louis Amprako, Kathrin Stenchly, Martin Wiehle, George Nyarko, Andreas Buerkert · Insects · Ghana

In 36 fields around Tamale in Ghana's Northern Region, researchers used 72-hour pitfall and pan trap sampling to examine how different irrigation water sources shaped arthropod communities in urban and peri-urban agricultural systems. Among 14,226 specimens spanning 13 orders, 103 families, 264 genera, and 329 taxa, analyzed with non-metric multidimensional scaling and redundancy analysis, arthropods grouped by irrigation source, with dipterans -- notably the disease-vector eye gnat Hippelates pusio -- dominant under wastewater irrigation, three alien ant species indicating community shifts from invasive species, and seven ant species forming mutualistic relationships with aphids flagging a future risk of aphid pest outbreaks.

Alexey Valerevich Vasilchikov · Eurasian Law Journal · Russia

A study of urban agglomeration development trends in the regions of the Russian Federation, drawing on analyses from various Russian sociological research schools, examines the differentiation between cities — including million-plus cities — competing for natural, demographic, financial, and investment resources. It finds that large agglomerations act as monopolists that in many cases hinder the successful development of medium-sized and especially small Russian cities, further worsening inequality in living standards and quality of life across localities throughout the Russian Federation.

Joseph Richmond Fianko, Mavis Korankye · West African Journal of Applied Ecology · Ghana

A study assessed the environmental and health impact of urban and peri-urban irrigated agriculture in Ghana by analyzing the physico-chemical and microbiological characteristics of irrigation water in the Greater Accra Region, calculating a comprehensive pollution index (CPI) and sodium adsorption ratio (SAR). Water samples used for informal irrigation contained significant microbial loads: total coliform ranged from 25×10² to 1209×10² cfu/100ml and E. coli from 2×10² to 651×10² cfu/100ml, with a mean total coliform level (517.917×10² cfu/100ml) far exceeding the recommended maximum guideline values of 5,000 and 1,000 cfu/100ml for irrigation water. CPI values ranged from 0.16 to 0.43 (average 0.27), indicating moderate pollution; about 42% of samples were classified as sodic waters, and SAR values of 3.42 to 24.75 meant nearly all samples exceeded the threshold (SAR > 4) associated with reduced water infiltration and soil permeability problems. The water is described as under persistent pollution pressure from expanding human activity, posing high risks to the health of the environment, farmers, traders, and consumers.

Mothership.SG · Mothership.SG · Singapore

This article reports that a tender for rooftop space on nine HDB multi-storey carparks in Singapore opened on 12 May 2020, closed on 16 June 2020, and results were announced on 30 September 2020. Nine sites (five standalone plus two clusters of two) were awarded to six operators; the article states the nine farming systems can potentially produce around 1,600 tonnes (1,600,000kg) of vegetables per year. The Singapore Food Agency (SFA) and Housing Development Board (HDB) were involved, and the project is framed as part of the '30 by 30' strategy to produce 30 per cent of Singapore's food locally by 2030.

Loïc Couttelle · OpenEdition (OpenEdition) · Global

Veolia is exploring new urban and peri-urban agricultural production systems to address regional challenges like soil sealing and climate change. Through an innovative experimental approach with partners, an intensive and high-quality agricultural model combining aquaponics and bio-intensive vegetable microfarming has been identified. These solutions, located on available land, aim to provide ecosystem services, efficient production, and respond to consumer demand for short supply chains and traceability.

Maurice Dasylva, Ngor Ndour, Bienvenu Sambou, Sara Danielle Dieng · European Scientific Journal ESJ · Senegal (Ziguinchor)

In Ziguinchor, Senegal, the peri-urban rice farming system contributes to food security but is ignored by decision-makers and suffers from urbanization and physicochemical changes in rice field soils. An agronomic diagnosis, based on 180 yield squares (1/4m side) installed in 4 peri-urban valleys, showed average yields of 4.79 ± 0.35 t.ha-1. However, urbanization, silting, acidification, and progressive salinization of soils are the main limiting factors for this production system.

Camille Dumat, Antoine Pierart, Muhammad Shahid, Sana Khalid · · Global

Urban agriculture, while a strategy for sustainable food production, faces a serious threat from natural and anthropogenic pollution sources in urban and peri-urban environments. These sources release hazardous organic and inorganic contaminants, leading to a high likelihood of human exposure. Consumption of vegetables grown on polluted urban soils or those that have intercepted metal-rich atmospheric particles represents a potential route of pollutant exposure and human health hazard.

Nicolás A. Mari, Nicolás A. Mari, Beatriz Giobellina, Beatriz Giobellina, Alejandro Benítez, Alejandro Benítez, Victoria Marinelli, Victoria Marinelli, Victoria Marinelli · Journal of Agronomy Research · Argentina (Córdoba)

A study mapped and quantified urban growth and land use in Córdoba, Argentina's Green Belt. Using remote sensing and GIS, it evaluated urban growth between 1974 and 2014 and land use in peri-urban and rural areas in 2015. The study revealed a 46.5% urban area growth over nearly 40 years, alongside an increase in farm plot size, indicating land ownership concentration and a reduced number of producers. This transformation highlights a conflict between peri-urban horticulture, industrial agriculture, and urban development.

L.C. Obuseng · Botswana Journal of Agriculture and Applied Sciences · Botswana (Gaborone)

This review highlights the potential for heavy metal accumulation in soil and crops from urban and peri-urban agriculture (UPA) around Gaborone, Botswana, due to the intensive use of chemical fertilizers, pesticides, wastewater, sludges, and industrial effluents. A literature review showed that fertilizers contain heavy metals, and the use of treated or untreated sewage water by UPA farmers can lead to heavy metal accumulation in soil and crops, posing a danger to human health. Information on heavy metal accumulation in soils is limited in Botswana, despite high agrochemical use in UPA vegetable production.

María Carolina Feito, Sofía Boza, Santiago Peredo · Repositorio Digital Institucional de la Universidad de Buenos Aires (Universidad de Buenos Aires) · Argentina

This study focused on the reality of Urban and Peri-urban Agriculture (AUPU) in Latin America, comparing cases in the Buenos Aires Metropolitan Area and the Santiago Metropolitan Region. Both cities form complex territories strongly related to their periphery, but the debate regarding AUPU's future development model remains open, reflected in contradictions even in public policies. The strong link between family farming and AUPU further complicates the situation due to the intrinsic limitations of family farming.

Christopher Torralba Pita · · Colombia (Bogotá)

This directory provides information on urban and peri-urban agricultural processes assisted by the Bogotá Botanical Garden in Colombia. The document records the names, addresses, phone numbers, and products and services (classified into 8 categories) of the gardens. The directory is organized by urban localities and includes 20 cartographic maps showing the georeferenced gardens.

Romero López, Iván Fernando · · Colombia (Bogotá)

This article proposes creating a gourmet restaurant in Bogotá, Colombia, to address food security and generate income for urban farmers in low-resource communities like Comuna 4 of Altos de Cazuca. The restaurant would purchase fresh produce weekly from local cultivators, supporting employment, innovation in cultivation infrastructure, and providing organic, quality products to customers. This initiative aims to improve commercialization for urban farmers who currently only support children's nutrition programs.

Marielle Dubbeling, R. van Veenhuizen, Jess Halliday · DOAJ (DOAJ: Directory of Open Access Journals) · Global

Urban and peri-urban agriculture is considered a strategy that can bring multiple benefits and help to build resilient urban food systems at the city region level and enhance the climate resilience of vulnerable residents. Cities, as major emitters of greenhouse gas (GHG), are not only contributing to climate change but are also directly and indirectly impacted by it. Key issues include rising temperatures, increasing rainfall, flooding, and urban food insecurity. Rapid urban growth will only increase the number of highly vulnerable urban communities, with the urban poor being most at risk.

Stephan Barthel, Christian Isendahl, Benjamin N. Vis, Axel Drescher, Daniel Evans, Arjan van Timmeren · The Anthropocene Review · Global

Global urbanization and food production are in direct competition for land. Displacing crop production from urban and peri-urban land due to soil quality issues will demand a substantially larger proportion of the Earth’s terrestrial land surface than the area lost to urban encroachment. This risks triggering distancing effects, unfair social-ecological teleconnections, and amplifying effects within the Earth System, potentially leading to food riots in cities of the Global South. The paper identifies multi-level leverage points, specifically an advisory global policy aligned with regional policies enabling robust common property rights for bottom-up actors in urban and peri-urban agriculture (UPA), to navigate urban expansion away from fertile croplands.