Research & reports

Julia R Bryant · Digital Archive @ GSU · United States (Atlanta)

This paper explores how urban farming in Atlanta, Georgia, shows evidence of neoliberal shaping and retooling. Through qualitative analysis, including a case study, interviews with farmers, participant observation, and archival data collection, it examines how the city and the farm are understood from the perspective of the farmer to understand the degree to which these contestations are resisting neoliberalism. The research suggests that while urban farming can provide spaces for contestation to neoliberalism, scholars should more fully consider the hybridized nature in which urban farmers understand their work.

Kinanti Safirtri, Oekan S. Abdoellah, Budhi Gunawan, Yusep Suparman, Parikesit Parikesit · The Qualitative Report · Indonesia

A qualitative study with 27 export-scale urban farmers in Bandung Metropolitan investigated market pressures to meet international food standards. While intended to encourage environmentally friendly practices, farmers interpreted the implementation of international food standards as an administrative formality for export requirements, rather than a critical reflection on environmental problems from intensive agricultural practices. Consequently, market pressure from international food standards was found to be paradoxical and ineffective in fostering farmers' environmental responsibility.

Kimberly Hill-Tout, Claudia Towne Hirtenfelder, Kiera E. B. McMaster, Megan Herod · Gastronomica The Journal of Food and Culture · Canada

In April 2021, a panel discussion on food security in Canada took place during the COVID-19 pandemic. This article aims to make visible the vulnerabilities and structural injustices embedded within Canadian foodscapes through different perspectives on food security and justice. COVID-19 rendered many of the structural injustices of food security in Canada more visible.

Maurice Kesonga Nsele, Jules Nkulu Mwine Fyama, Kevin Maréchal, Thomas Dogot · Agriculture · Democratic Republic of Congo (Lubumbashi)

In urban agriculture in Lubumbashi, Democratic Republic of Congo, an innovative technology package was disseminated, but ten years later, farmers' daily income was less than USD 1.25, and critical exceedances of heavy metal content standards in crops were recorded. Survey data from 202 farmers and a Logit model identified factors influencing the sustained adoption of two innovations: motor pumps and integrated soil fertility management. Socio-demographic factors were not significant for motor pump adoption, and only mutual aid moderately influenced integrated soil fertility management. Economic factors like land tenure and income diversification were significant for motor pump adoption, but no economic factors were significant for integrated soil fertility management. Institutional factors such as access to credit and association membership were significant for the sustained adoption of both innovations.

Eugene McCann, Nathan McClintock, Christiana Miewald · Environment and Planning E Nature and Space · United States (Portland, Oregon)

This paper introduces "impermaculture," a model of urban agriculture where farmers in cities like Portland, Oregon, embrace the impermanence of their operations, viewing the potential for displacement by higher-value developments as an intended modus operandi. This approach, utilizing portable growing systems, is presented as a means of stabilizing the "sustainability fix" in neoliberal cities. The study suggests that this 'impermaculture by design' shores up and temporally rescales the sustainability fix, providing stability to urban agriculture initiatives despite their temporary nature.

Demoundou Namodji, Ndoutorlengar Medard · International Journal of Humanities Social Sciences and Education · Chad

This article notes that while urban agriculture is protected and encouraged by governments in developed countries like Japan, in Africa, urban farmers often face repressive measures from urban administrators or planners. Despite its role as a safety valve for low-income households, urban agriculture in Africa is subject to these restrictive governmental actions.

Nicola C. Thomas, Anders Blok · Nature and Culture · Denmark (Copenhagen)

This study analyzes the social and political conditions of urban allotment gardens in Copenhagen, which are specially protected as valuable urban nature. It finds that asymmetric civic-public compromises, while enabling protection, result in new material conflicts between civic and municipal actors. These conflicts are linked to unresolved competing visions of civic, green, and market sustainability in urban development.

S.B. Jilcott Pitts, R.A. Seguin, J. Kolodinsky, E.H. Morgan, M.J. White, M. Sitaker, J.T. McGuirt, W. Wang, K.L. Hanson, A.S. Ammerman · UNC Libraries · United States

This study examined perspectives on food access among 53 low-income families with children participating in a cost-offset community-supported agriculture (CO-CSA) program across nine communities in the US states of New York, North Carolina, Washington, and Vermont. Focus groups revealed that while produce quantity was abundant and affordability was generally good, payment timing was a barrier for some, and unfamiliar foods and quick spoilage hindered acceptability. The study concluded that CO-CSA may facilitate increased access to fruits and vegetables, but perceptions of positive diet change may be limited by challenges in incorporating share pick-up into regular travel patterns and meal planning, with food waste concerns being particularly acute for families with constrained resources.

Janet Music, Charlotte Large, Sylvain Charlebois, Kydra Mayhew · Local Environment · Canada

This systematic scoping review revealed the extent of existing knowledge regarding the governance and management of urban grassroots agri-food organizations in Canada. Among Canadian studies, 15 were qualitative case studies, 11 were exploration/analysis papers, one was a literature review, and one was a quantitative analysis. It was found that for greater success in urban agriculture, municipal policymakers need to intentionally and radically shift policy to plan for and integrate urban agriculture networks into the urban environment without taking over the networks themselves. The review also indicated a lack of broad research into the influence of gender dynamics on the organization and management of urban agriculture or community gardens.

Gamuchirai Chakona · · South Africa

A study surveyed 314 randomly selected households in four peri-urban settlements in South Africa to assess dietary diversity and food security. Findings revealed generally low dietary diversity and high levels of food insecurity across all sites, with male-headed households experiencing worse conditions than female-headed households. Food insecurity was linked to high poverty, unemployment, and low education levels.

Abdolzaher Ghezeljeh, Jutta Gutberlet, Denise Cloutier · Canadian Geographies / Géographies canadiennes · Canada (Victoria)

This study used qualitative research methods to explore the main barriers to urban agriculture as perceived by community-based groups in Victoria, British Columbia. Data from 18 semi-structured interviews and two community mapping workshops with residents, government officials, and non-governmental groups revealed "urban agriculture zones" and "garden-style" apartment housing as important avenues. However, progress towards far-reaching changes requires an efficient urban agriculture development process, including creating site inventories, increasing stakeholder participation, reducing waitlists, and tackling high land prices.

Contingent Horizons · Contingent Horizons The York University Student Journal of Anthropology · Canada (Winnipeg)

This paper uses the Rainbow Community Garden in Winnipeg as a case study to discuss the benefits and challenges of community gardening for new immigrant and refugee families. Through a literature review and interviews with gardeners, the study emphasizes the role of food and community gardens in facilitating cross-cultural interactions, providing culturally appropriate food, and expressing cultural identity. The main conclusion is that for new immigrant and refugee participation, a garden is not only physical soil but also an important place for practicing culture and engaging in meaningful cross-cultural interaction beneficial for adjusting to a new life in Canada.

Ainsley C. McStay, S.L. Walser, Eric C. Sirkovich, Nicolas Perdrial, Justin B. Richardson · Journal of Environmental Quality · United States

This study evaluated portable X-ray fluorescence (pXRF) measurements of macronutrients, micronutrients, and toxic elements (As, Pb) in soils and plants from 10 urban community gardens across the eastern United States. It found that pXRF and traditional methods provided agreeable estimates for some elements (Mn, Cu, Zn, Pb) but not for macronutrients (Ca, K, P). While pXRF is an accurate tool for screening Mn, Cu, Zn, and Pb, macronutrients were poorly estimated in fruits, leaves, and roots, and genus-specific and garden-specific factors may be important for plant uptake models.

Anne-Louise Fritz, Ramia Jannoura, René Beuschel, Christoph Steiner, Andreas Buerkert, Rainer Georg Joergensen · Chemical and Biological Technologies in Agriculture · Africa

This 2-year study in semi-arid Ouagadougou and sub-humid Tamale, West Africa, measured the effects of biochar and N fertilization on soil microbial biomass carbon, fungal ergosterol, and functional diversity. Sole biochar addition did not affect soil chemical or biological properties, but biochar with N fertilization increased microbial respiratory response. N fertilization decreased soil pH by 1.1 units in both cities, and a pH of 4.7 led to reduced microbial biomass carbon and ergosterol contents in Tamale. An N fertilizer-induced decline in soil pH below 5 should be avoided, as it decreased microbial biomass carbon and microbial functional diversity.

Ana Clara Aparecida Alves de Souza, Fernando Dias Lopes · Cadernos EBAPE BR · Brazil (Porto Alegre)

This two-year participatory investigation of Horta da Formiga, a collective urban garden in Porto Alegre, Brazil, analyzed how key agents reconcile inherent contradictions. The study found that while individuals exhibit agency, structured conditions within the social field prevent the organic and diverse reconciliation of contradictions. This occurs despite agents aligning with state-legitimized capital.

Elizandra Flávia Araujo, Marcos Paulo Fuck · Cadernos de Ciência & Tecnologia · Brazil (Curitiba)

This study aimed to identify and characterize different categories of urban agriculture practitioners in Curitiba. A descriptive study using bibliographic and documentary analysis found that urban agriculture activities are concentrated in peripheral areas of the city, with most participants having a monthly family income of up to two minimum wages. Despite a wide range of actors engaging in these practices, their visibility and inclusion in the political agenda occur asymmetrically.

Amine Mseddi, Mariann Simon · European Journal of Architecture and Urban Planning · Hungary (Budapest)

This paper analyzes four community gardens on vacant inner-city plots in Budapest, Hungary, to understand their challenges and opportunities. It found that these gardens face significant obstacles including temporary status, changing political circumstances, and varying local population attitudes. Despite these challenges, NGOs and local communities play a crucial role in sustaining these projects and raising awareness.

Paulien C. H. van de Vlasakker, Karin Tonderski, Geneviève S. Metson · Frontiers in Sustainable Food Systems · Global

A review of empirical peer-reviewed studies (2000-2021) on nutrient losses to water from soil- and ground-based urban agriculture. Of 241 publications screened for a stated concern with nutrient losses to water, 20 were retained, but only seven had actually measured losses to water. Of four experimental studies, three measured leachate losses under different garden management practices; of 16 real-world studies, only four quantified losses to water as leachate, with measured average losses ranging from 0.005 to 6.5 kg/ha for phosphorus and 0.05 to 140 kg/ha for nitrogen. Thirteen of the 16 non-experimental studies provided input and harvested-crop data allowing nutrient balances to be calculated; despite wide value ranges, most studied gardens showed nutrient surpluses (inputs exceeding crop harvest) for nitrogen and phosphorus but not potassium, identified as a risk factor for losses to water, though large surpluses were not always linked to higher leachate losses. The review concludes that more field studies measuring actual losses to water, and documenting contextual factors, are needed to determine whether urban agriculture can contribute to a circular economy without causing nutrient-related water quality impairment.

James D. Blount, Leah E. K. Lenoch, Faith A. Fitzpatrick · Journal of Great Lakes Research · United States

A study of Apple Creek, Wisconsin (119 km²), a Great Lakes tributary like many others subject to Total Maximum Daily Load (TMDL) targets requiring reductions of 51.2% in suspended sediment and 64.2% in total phosphorus. From August 2017 to October 2018, an integrated stream sediment budget and fingerprinting study quantified upland and stream-corridor sources of suspended sediment and sediment-bound phosphorus. Phosphorus concentrations varied among source groups and fluvial sediment types, with higher concentrations in suspended sediment and cropland soils. Eroding streambanks accounted for 100% of the TMDL model's (SWAT) suspended sediment load but only 20% of the total phosphorus load; fine-grained streambed sediment equated to roughly three years of modelled suspended sediment load but only one-third of the total phosphorus load. The two primary sources of fine-grained streambed sediment were streambanks and cropland, with the relative streambank contribution increasing downstream and with watershed area. The relative proportion of suspended sediment varied by season and streamflow, but weighted for representative streamflow, cropland and streambank erosion accounted for 54% and 23% of suspended sediment respectively. Urban land was a source in the upper watershed, but its signature was sequestered by a mid-watershed detention basin, and contributions from construction sites were higher in fall 2018, likely corresponding to increased activity following a wet spring.

Jaime Pizarro‐Araya, Fermín M. Alfaro, Francisco Gómez, Roberto Villablanca · Anthropocene Coasts · Chile

A 2022 study characterized the taxonomic richness and abundance of terrestrial arthropod fauna at the Aguada de La Chimba urban coastal wetland in the Antofagasta Region, Chile, using multiple survey methods. From a total of 1,874 specimens, it identified 109 terrestrial arthropod species, with Insecta the most represented taxon (85 species, 47 families, 15 orders); by origin, communities included 24% native, 22% naturalized, and a smaller proportion of endemic species. The study reports that urban coastal wetlands are fragile ecosystems subject to serious disturbance in structure, function, and diversity from advancing urban, agricultural, foraging, and drainage activities, including displacement of endemic species by invasive ones, and discusses the major threats to this wetland alongside the importance of public-private partnerships with the local community for biodiversity conservation.

Despal Despal, Claudia Faresty, Rika Zahera, T Toharmat · Biodiversitas Journal of Biological Diversity · Indonesia

An observational study of 36 dairy cattle in the Kebon Pedes area of Bogor City, Indonesia, tracked feeding, rumination and resting behavior over 12 hours (6 am–6 pm) alongside temperature, humidity, temperature-humidity index (THI), nutrient intake and milk production. The cattle were found to be in mild-to-severe heat stress (THI above 78), with reduced dry matter intake (11.17 kg) and deficient energy and crude-protein intake that led to lower milk production (11.01 L/head/day), though milk fat content was comparatively higher (5.44%); the authors recommend improved forage quality to increase eating and rumination time and reduce resting time.

Michel Shengo Lutandula⃰, Fabien Ilunga Mpanga · The Global Environmental Engineers · Democratic Republic of Congo (or Africa)

In Katuba municipality, Lubumbashi, Democratic Republic of Congo, irrigation water, soil, and harvested amaranth from an area of urban amaranth cultivation were analyzed for chemical and microbiological pollutants. Water and amaranth were polluted on both mineral and microbial fronts, while soil was not; water samples contained Paramecia, Entamoeba histolytica eggs, fecal contamination indicator germs, mesophilic flora, and pathogens including Aeromonas hydrophila and Pseudomonas aeruginosa. Amaranth cobalt concentrations exceeded quality standards and the plants were contaminated with Paramecia, Entamoeba histolytica eggs, Escherichia coli, and Klebsiella planticola, leading to the conclusion that consuming these amaranths poses health risks to the population.

Nirosha Ruwani Amarasekara, Abdullah Ibn Mafiz, Xun Qian, James M. Tiedje, Weilong Hao, Yifan Zhang · Journal of Agriculture and Food Research · Global

Metagenomic analysis of total soil DNA from urban vegetable garden soils examined the co-occurrence of antibiotic resistance genes (ARGs) with resistance genes to other compounds, including heavy metals and biocides. Relative abundance was 2.00-2.90 x 10^-1 copies per 16S rRNA gene for ARGs and 4.22-6.00 x 10^-2 for metal resistance genes (MRGs), with the most abundant ARGs conferring multidrug, vancomycin, bacitracin, fosmidomycin, and macrolide-lincosamide-streptogramin (MLS) resistance, alongside MRGs for copper, arsenic, multiple metals, iron, and chromium, biocide resistance genes (BRGs) for multi-biocide, peroxide, and phenolic compounds, and multi-compound resistance genes (MCRGs) combining biocide-metal, drug-biocide-metal, and drug-biocide resistance. Multidrug resistance genes (including mexF, mexW), the MLS gene macB, and the MCRG ruvB showed the strongest correlations with other resistance genes, demonstrating extensive co-occurrence of ARGs, MRGs, BRGs, and MCRGs in urban agricultural environments and suggesting that soil contaminants have potential as co-selection agents for antibiotic resistance.

Pastory Salvatory Thomas, Wilbard Kombe, Aldo Lupala · International Journal of Social Science Research and Review · Tanzania

In-depth interviews with 60 purposefully selected respondents in the Daraja Mbili and Lemala wards of Arusha City, Tanzania, examined how diverse stakeholder perceptions of urban agriculture affect its governance. Farmers and agricultural officers viewed urban agriculture positively because their livelihoods and professional interests were tied to it, while urban planners and environmental officers were skeptical, citing a lack of evidence for its value, and implementation and enforcement of related policies and bylaws had not succeeded. Farming in environmentally sensitive areas violated bylaws, yet encroachment by farmers with no alternative land continued. The study concludes that urban agriculture cannot be effectively governed, even where policy and bylaws exist, as long as the actors involved perceive it negatively.

Felix Chari, Bethuel Sibongiseni Ngcamu · Environmental & Socio-economic Studies · Sub-Saharan Africa

This narrative review searched Scopus, the Directory of Open Access Journals, Web of Science, Google Scholar and Academic Search (EBSCO) using terms including "urban farming," "urban agriculture" and "climate change" to synthesize literature on climate change's effects on urban agriculture in sub-Saharan African cities. While reviewed studies agree that climate change affects urban agriculture from production through processing, storage and distribution, integrated literature on the topic remains scarce, and the extent and magnitude of impacts differ by region, meaning adaptation and mitigation strategies cannot be applied universally and must instead be context-specific.