Research & reports

Thulisekari Prasanna, Guda Bhargavi, Murugesan Mohana Keerthi · Frontiers in Sustainable Food Systems · Global

This comprehensive review synthesizes literature on vertical and urban agriculture within sustainable food systems, identifying production models and technical advancements. Empirical evidence indicates these systems can improve water/land-use efficiency, yield stability, and reduce post-harvest losses. However, significant challenges persist, including high capital and energy prices, inadequate crop diversification, technical complexities, and regulatory constraints, impacting their economic viability.

Jonas Sohn, Juliane Dziumla, Atiqah Fairuz Salleh, George Xydis · Sustainability Nexus Forum · Global

This study evaluated vertical farming (VF) through the resource nexus (RN) lens, emphasizing the interdependencies among energy, water, land, and materials. While VF offers advantages such as space efficiency, water conservation, and climate resilience, it was found to entail high energy demands, material dependencies, and economic feasibility challenges. An overview of these synergies and constraints helps identify mitigation strategies like circular water systems and hybrid renewable energy solutions.

Noxolo B.M., Kanosvamhira T.P. · Urban Agriculture & Regional Food Systems · 南アフリカ・ケープタウン（低所得地区）

Surveys and interviews assess whether hydroponics, of interest because dense settlements leave little space, is actually viable in Cape Town's low-income urban areas — deliberately supplementing a literature skewed towards Global North cities. Farmers perceive benefits in improved yields, water conservation and efficient land use, all valuable in a water-scarce, space-constrained city, but high setup costs and limited government support remain significant obstacles. Drawing on urban political ecology, the paper argues these financial and institutional barriers are rooted in historically produced inequality and ongoing capitalist dynamics of urban development. It concludes that while hydroponics has potential as a sustainable alternative, its high costs hinder broader applicability, and it is not yet a viable large-scale route to food security where resources are unequally distributed; supporting actors must first address financial feasibility and local expertise.

Darrow S., Kathi S., Liebe R., Cline L.L., Moss J.Q. · Urban Agriculture & Regional Food Systems · 米国オクラホマ州（農村・都市・近郊）

Oklahoma's specialty crop sector is in decline — vegetable operations fell from 799 in 2007 to 482 in 2022 — yet regional fruit and vegetable producers remain the primary supply foundation for farmers' markets, food hubs and direct retail serving urban and peri-urban communities, so producer viability is itself an urban food access and public health concern as food deserts expand. Five semi-structured focus groups with 29 experienced producers from rural, urban and peri-urban Oklahoma were analysed by open coding thematic analysis in NVivo, with saturation confirmed iteratively and rigour established through member-checking, peer review of codes and field note triangulation. The 180 initial codes were organised into 10 parent codes and three themes: the countercultural philosophy of production, the lack of accessible resources, and industry barriers preventing development — compounding disadvantages at cultural, institutional and structural levels. The authors call for a statewide local food system plan, a growers' association and dedicated local-food-system extension roles.

Florien Misago, Isaac Nzayisenga, Henri Jacques Ngirinshuti, Leon De Pere Irakoze, Richard Mind’je · East African Journal of Agriculture and Biotechnology · Rwanda (Kigali)

This study evaluated the potential of rooftop and wall-based urban agriculture to enhance food security in Gasabo District, Kigali, Rwanda. It used GIS and remote sensing to map suitable spaces and assessed 400 household heads using the Household Food Insecurity Access Scale (HFIAS). Findings showed that 41.5% of households experienced moderate to severe food insecurity, and approximately 32% of rooftops and walls were structurally appropriate for urban agriculture. While 57.8% of households expressed willingness to adopt rooftop or wall gardening, 67.4% cited structural and financial constraints.

Gokulakrishnan G, Navaneetha Krishnan T, Tamilselvan D, S Sanjeevkumar, Devaganesh A, Janani N, K. Arunadevi, Balaji Kannan · Madras Agricultural Journal · Global

This review explores vertical farming, a method that uses stacked layers in controlled environments for year-round crop production with reduced resource use. It assesses the environmental and economic advantages of vertical farming, while critically examining its limitations, including high energy demands and limited crop diversity. The study highlights that despite its potential, vertical farming faces challenges regarding economic viability due to high energy consumption.

Jairo Guzman-Molina, Gustavo Carrazana-Rosales, Daniel Karthe, W. C. Tabares Rodríguez, Serena Caucci · Environmental and Sustainability Indicators · Colombia (Bogotá)

To assess the sustainability of Urban and Peri-Urban Agriculture (UPA) in Bogotá, Colombia, a Composite Indicator (CI) integrating 43 variables from an in-depth survey of over 3,500 households was developed. The study revealed that UPA significantly contributes to Bogotá's environmental resilience, particularly in soil conservation and integrated water management. However, while UPA promises food security, its unstructured value chain limits its impact on economic sustainability.

Stefan Galley, Rita Saleh, Patrick Bottazzi · Journal of Rural Studies · Switzerland

This qualitative study compares three Swiss communal agricultural prosumption (CAP) types: allotment gardens (AGs), community gardens (CGs), and community supported agriculture (CSA), using Grounded Theory. It found that community-centred CAPs (CSAs, CGs) generate political agency but face financial barriers limiting participation. Individual-centred CAPs (AGs) offer autonomy but have high knowledge requirements and lack political leverage, posing crucial challenges for long-term viability. The study concludes that targeted policy and institutional strategies are needed to ensure the continuity of all CAP types.

M.M. Rasmuna, VGR Chandran, J.S. Keshminder · Malaysian journal of consumer and family economics/Malaysian Journal of Consumer and Family Economics · Malaysia

This study explored challenges in maximizing the capacity of urban farms for economic viability and sustainability in Malaysia. Through in-depth interviews with urban farmers in several case studies, five key challenges were identified: financial, human capital, environmental, institutional, and psychosocial. These challenges impede the economic viability and sustainability of community urban farming.

Augustin Tshilumba Ilunga, Michel Mbumba Bandi, Albert Tshinyama Ntumba, Damien-Joseph Muteba Kalala · Revue Africaine d’Environnement et d’Agriculture · Democratic Republic of Congo

A study of urban agriculture in Kinshasa, Democratic Republic of Congo—a sector described as vital for food security and employment amid rapid urbanization, food insecurity, and unemployment, where farms face significant challenges including land pressure, restricted access to credit, and lack of institutional support. The study aimed to (i) examine the motivations of agri-entrepreneurs, (ii) assess their impact on farm viability, and (iii) identify the economic and non-economic factors influencing business sustainability, using a qualitative and quantitative survey combining 20 semi-structured interviews across three peripheral zones (via snowball sampling) with documentary analysis. Three categories of entrepreneurs were identified: civil servants farming as a supplementary activity, private-sector employees investing in farming, and traders farming to secure their survival. Non-pecuniary motivations such as social engagement and passion strengthened resilience, but land insecurity, a financing deficit, and lack of training were identified as the major obstacles farms face; observed adaptive strategies included diversification and informal partnerships. The study concludes by calling for integrated strategies to secure land tenure, facilitate access to credit, and professionalize the sector while integrating peri-urban agriculture into urban planning processes.

Stephen Leitheiser, Rubén Vezzoni · Frontiers in Sustainable Food Systems · Global

This paper presents a conceptualization of radical food democracy (RFD), linking diverse economies with diverse citizenship. Diverse economies scholarship, while valuable for theorizing alternative food networks (AFNs), has been criticized for essentializing the autonomy of alternative economic practices, risking the confusion of emancipatory social change with market-embedded products and the displacement of negative impacts. The paper argues that realizing RFD requires both experimenting with new economic practices that create food economies alternative to capital accumulation and cultivating new political subjects capable of universalizing these struggles.

Sonia Gatchair · · Jamaica (Kingston)

In Kingston, Jamaica's largest urban space, systematic efforts to stimulate the adoption of commercially viable urban agriculture have lagged. This study examines the facilitators and impediments to commercially viable urban agriculture, arguing that knowledge transfer and the adoption of innovative, technology-driven approaches to farming, financing, and marketing are needed for success.

Dr.M.K. Ganesh · International Journal for Multidimensional Research Perspectives · Global

This mixed-methods study examined the farm-to-table movement in restaurant food production, identifying benefits like enhanced food freshness and local economic support. However, it also found significant challenges including higher costs, seasonal variability, and complex supply chain logistics. Consumer perceptions were generally positive, but the study emphasized the need for increased consumer education and policy support to overcome barriers.

Kelvin Haule, Bupe Kabigi · Ghana Journal of Geography · Tanzania

This study analyzed land markets and their influence on peri-urban agriculture and livelihood strategies in Tanzania. It found that widespread monetary land markets, including formal, informal, speculative, entrepreneurial, and land grabbing forms, are transforming peri-urban agriculture into non-farm activities. These informal changes are causing a “sendoff” of peri-urban agriculture, and if unmanaged, land markets are suggested to become a blight for indigenous people selling land.

Shu Hua Teoh, Gwo Rong Wong, Purabi Mazumdar · Innovations in Agriculture · Global

A review combining scientific literature analysis and interviews with urban farmers examined urban farming models including community, indoor, rooftop and vertical farms using techniques such as aeroponics, hydroponics and aquaponics. It found that sustainability and yield remain major challenges to fully realizing urban farming's potential, identifying limited land and water resources, pest and disease incidence, financial constraints on setup and maintenance, knowledge and skill gaps among participants, and a lack of effective collaboration between universities, government and industry as the key barriers.

Catharina Any Sulistyowati, Suraya Afiff, Muhammad Baiquni, Mia Siscawati · Agroecology and Sustainable Food Systems · Global

A literature study conducted from October 2021 to June 2022 identified challenges in the development of Community Supported Agriculture (CSA). Farmers face expenses for sustainable practices and labor shortages, while CSA members encounter issues with time commitment, cost, and adapting food consumption habits. Organizational challenges include member recruitment and retention, competition, and CSA sustainability.

P. Post, H. Hengsdijk · · Global

This study inventoried and characterized food production systems in Rincon, Bonaire, combining literature review and online key-informant interviews with biophysical analysis and calculations of land and water requirements for several production scales, and applying a SWOT analysis to multiple production systems. It found that increasing year-round fruit and vegetable production in Rincon, and Bonaire more broadly, is challenging and may not be feasible without support, given limited and irregular water availability, an unsupportive business environment, and harsh conditions from pests, diseases, and weather; without sufficient support to expand water availability, local agricultural knowledge, and a suitable business environment, neither capital-intensive nor small-scale crop production is likely to improve the availability of healthy food or employment opportunities.

Grace Ning Yuan, Gian Powell B. Marquez, Haoran Deng, Anastasiia Iu, Melisa Fabella, Reginald B. Salonga, Fitrio Ashardiono, Joyce A. Cartagena · Heliyon · Global

This review examined urban agriculture (UA) across technology, socio-economy, and policy, noting that supporting UA expansion in cities is challenging due to its poor economic profitability. The study highlighted UA's value beyond profitability, including social, health and well-being, disaster risk reduction, and environmental benefits. It also presented advancements in UA technologies and plant biotechnology as potential solutions for increasing the future profitability of commercial UA.

Yiming Shao, Zhugen Wang, Zhiwei Zhou, Haojing Chen, Yuanlong Cui, Zhenghuan Zhou · Sustainability · Global

Vertical farming faces challenges such as high energy consumption, costs, and a lack of social acceptance. This study investigated public acceptance of micro-vertical farming using a deconstructed theory of planned behavior model. Results showed that the overall mean of public behavioral intentions to use vertical farming was 3.9, which is above neutral (3.00) but less than positive (4.00).

Helen Toxopeus, Friedemann Polzin · Journal of Environmental Management · Global

A systematic review of academic literature identified key barriers and strategies for financing urban nature-based solutions (NBS), including urban agriculture. Two overarching barriers were found: a lack of coordination between private and public financiers, and difficulties in integrating NBS benefits into valuation and accounting methods. The review concluded that an integrated accounting and valuation framework for NBS is currently lacking, and strategies often focus on encouraging co-financing from private beneficiaries.

Ana Mélice Dias, Teresa Marat-Mendes · DOAJ (DOAJ: Directory of Open Access Journals) · Portugal (Lisbon)

This paper investigated the impact of municipal planning instruments on urban agriculture in Lisbon and its surrounding territory, Portugal. It concluded that current planning regulations in Lisbon’s Greater Area are specifically focused on morphological solutions that give preference to urban agriculture uses related to leisure and aesthetic solutions, to the detriment of design solutions that tackle economic growth or ecological diversity.

Kheir Al‐Kodmany · · Global

A book chapter arguing that cities will need internal food production to meet demand from growing urban populations and to avoid congestion, pollution and unaffordable food prices, and examining vertical farming — using hydroponics, aeroponics and aquaponics — as an approach suited to urban settings where land is limited and expensive. After reviewing these technologies and project prototypes, the chapter closes by stating that economic feasibility, building codes and regulations, and a lack of expertise remain major obstacles to implementing the vertical farm.

Milagros de la Caridad Mata Varela, Johana Meza Salvatierra, Ana Yilian Santana Mata · DOAJ (DOAJ: Directory of Open Access Journals) · Global

This research evaluated investment project management in urban agriculture through its life cycle, applying eighteen indicators and a management index. The study concluded that an agroecological farm development project exhibited economic inefficiency during its first two years of operation due to an imbalance between income and expenses, preventing high management values.

Cuthbert Majoni, Deliwe Tembachako, Anyway Katanha · RePEc: Research Papers in Economics · Zimbabwe

This study was conducted in Bindura urban area, Zimbabwe, to evaluate the viability of urban quail farming, interviewing 40 urban quail farmers selected via snowball sampling and 10 key informants using semi-structured guides. Key challenges highlighted included inadequate housing facilities, insufficient space, theft, predation, inadequate knowledge, market price fluctuations, inability to access credit, and misconceptions in urban agriculture policies. Despite these challenges, urban quail farming showed potential to boost family income and reduce poverty to some extent.

Fatemeh Kalantari, Osman Mohd Tahir, Raheleh Akbari Joni, Ezaz Fatemi · Journal of Landscape Ecology · Global

This paper critically reviews 60 published documents on vertical farming — cultivating plants and livestock on vertically inclined surfaces such as skyscrapers in land-scarce urban areas — assessing it against environmental, social, and economic dimensions of sustainability, and notes that published critical reviews on the topic remain scarce. Economic viability is named as one of the challenges considered alongside environmental and social factors, but the abstract does not present specific cost, revenue, or failure data to support this; it concludes, without citing supporting figures, that vertical farming can be "potentially beneficial" for food production, quality, safety, and food security.