Research & reports

Marzieh Rezaei Qaleh, Hossein Medi, Mahdi Sheybani · Cumhuriyet Science Journal · Iran (Qazvin City)

This study investigated the role of urban agriculture in sustaining the urban environment, using Qazvin City, Iran, as a case study. Qazvin City, historically surrounded by traditional gardens that created a favorable urban environment, is now experiencing the destruction of these garden environments due to development processes, posing a risk of breaking the chain of environmental sustainability. The research, based on content analysis through observation and document study, proposed solutions considering environmental concerns, including preserving old irrigation methods, restoring native plant species, and focusing on existing water resources.

徐晶, 吴聪 · 中国土地 · China (Wuhan)

This paper analyzes the practice and problems of "multi-plan integration" in Wuhu Street, Huangpi District, Wuhan City, a rapidly urbanizing area dominated by modern urban agriculture. Wuhu Street faces issues such as the disorderly sprawl of construction land and low land use efficiency. The study proposes targeted policy recommendations based on these findings.

Susmita Dasgupta, Asif Zaman, Subhendu Roy, Mainul Huq, Sarwar Jahan, Ainun Nishat · · Bangladesh (Dhaka)

A study on flood mitigation in Dhaka explored complementary measures to existing drainage systems and discussed institutional, technical, and financial challenges to their implementation. A commonly acknowledged challenge for Dhaka is the lack of coordination among agencies, exacerbated by scarce resources and unplanned development. Clogging of stormwater drains with solid waste was identified as a primary reason for frequent localized flooding, and issues with khals (canals) regarding water flow, encroachment, and walkways were also noted.

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.

Kit Yieng Chan, Michelle Chan, Oi Yan Chan, Thomas Y.K. Chan, Tsz Mei Chan, Sharon B. Chang, Kenrick Chau, Tarik Chelali · cIRcle (University of British Columbia) · Canada

Research at the University of British Columbia (UBC), Canada, investigated whether rooftop gardens could reduce greenhouse gas emissions and food transportation carbon emissions. While edible landscapes could potentially assist with climate goals, they require careful selection of crops, buildings, and resources. Preliminary calculations indicated that rooftop and community gardens would do very little to reduce the UBC campus's dependency on imported food.

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.

Jiang Lu · Nongye jingji yu guanli · China (Beijing)

This study analyzed the current state of urban agriculture development in the Beijing-Tianjin-Hebei region, focusing on aspects like leading industry and farmers' income. It found that while the urban agriculture layout was basically formed, significant problems exist. These include resource and environmental crises, a lack of integrated regional planning, imperfect municipal systems, and challenges in upgrading the agricultural industry.

Mark Matsa, Beauty Dzawanda · · Zimbabwe

This study assessed the performance of Caritas-initiated and sponsored community gardens in Chaka ward, Chirumanzu District, Zimbabwe, during and after the sponsors' regime. Data was collected using questionnaires, interviews, and direct observations, and analyzed with descriptive statistics and content analysis. Results showed that the gardens flourished during Caritas's presence but quickly shrank and folded after the NGO's departure, indicating a lack of sustainability.

Ranka Junge, Andreas Graber · Zürcher Hochschule für Angewandte Wissenschaften digital collection (Zurich University of Applied Sciences) · Global

This paper discusses the need for practical tools and a stronger scientific base for sustainable urban farming, noting that visionary schemes often lack current practical application with available technologies. It identifies requirements for urban food production, including high quality, safety, and cost-effectiveness, and suggests innovations in planting, pest control, irrigation, and integration with existing building infrastructures. Aquaponics is presented as having the potential to contribute to all these aspects.

Gunwon Lee, Yunnam Jeong, Byunghak Min, Seiyong Kim · Journal of the Korea Academia-Industrial cooperation Society · South Korea

This study investigated improving South Korea's Biotope Area Ratio system for urban agriculture vitalization. The research found that the existing Biotope Area Ratio indicators, which only consider soil depth and permeability, have limitations in managing plant growth for urban agriculture. Focusing on daylight conditions as a critical factor, the study concluded that the current Biotope Area Ratio indicators are insufficient for adequately addressing plant growth in urban agriculture.

H. C. Agada, E. A. Obienusi, Emma E. Ezenwaji · Journal of environment and earth science · Nigeria

This study evaluated urban forestry and housing patterns in Awka metropolis, Anambra State, Nigeria, over a ten-year period (2001-2010). Analysis of land use data using linear regression and correlation coefficients confirmed a significant correlation between housing patterns (urbanization) and the distribution of trees (forestry). The least square regression results indicated that the rate of forest displacement is a direct consequence of increasing structural development in the study area.

Yu Wang · · China (Xi'an City)

This study analyzed the dynamic changes in urban agricultural landscape (arable lands and garden plots) due to urbanization in Chang'an District, Xi'an City, China, using remote sensing, GIS, and FRAG-STAT techniques. Compared to 1999, arable land area decreased and aggregation declined by 2.45% in 2011, while garden plot area increased and aggregation rose by 10.44%. Improved urbanization levels decreased arable land area and increased fragmentation, but correlations with garden plot landscape indexes were insignificant.

Tian Lib · Chinese Journal of Tropical Agriculture · China (Hainan)

This paper summarized the status of protected horticulture in Hainan, China, identifying major problems such as a deficiency of special varieties, unsuitable introduced facility types, lack of a non-nuisance production system, and insufficient capacity for resisting natural disasters and environmental control. To achieve sustainable development, the local government needs to strengthen funding and policy support, enhance farmers' awareness of pollution-free production, and improve management techniques.

Da Wang · · China (Beijing)

This study evaluates and analyzes urban agriculture in Beijing by focusing on the relationships among its subsystems and their relative influence. Results show that the comprehensive evaluation index of urban agriculture has risen steadily with a positive trend, but that the comparative advantages of both the population subsystem and the social subsystem have weakened, due to the loss of agricultural labor force and the urban-rural income gap. Meanwhile, the function of the environment and resource subsystems has strengthened, promoting a shift in Beijing's urban agricultural mode from one led by the economic subsystem toward one led jointly by the environment and economic subsystems. Given increasing pressure on environment and resources, the study concludes Beijing needs to build an ecological urban agriculture system and move away from an industrial development approach.

Sam E. Wortman, Sarah Taylor Lovell · Journal of Environmental Quality · United States

This review paper characterized the limited state of scientific knowledge regarding abiotic environmental factors threatening the growth of urban agriculture in the United States. It identified challenges influencing urban cropping systems, including soil contamination and remediation, atmospheric pollutants and altered climatic conditions, and water management, sources, and safety. The development of a science-based approach in these areas is noted as essential for the economic and environmental sustainability of urban agriculture.

Lijie He · · China

This article analyzes the current situation and problems of urban agricultural development in small towns of China. It identifies severe problems hindering progress, including decreasing agricultural land, severe waste of land resources, serious agricultural pollution, low quality and income of agricultural labor, limited transport capacity, insufficient funding, and a lack of related policies and regulations.

Robert Garey Stewart, Marcel Korth, Laurenz Langer, Shannon Rafferty, N Rebelo Da Silva · · Global

This paper is a protocol for a systematic review on the impacts of urban agriculture programs on food security and nutrition in low and middle-income countries. It notes potential disadvantages of urban agriculture, including contamination, spread of diseases, depletion of water supplies, soil erosion, and health risks from pesticides. The review aims to identify, appraise, and synthesize evidence on these impacts comprehensively and transparently, given that the existing evidence-base is not well understood.

Priyanie Amerasinghe, R. M. Bhardwaj, Christopher A. Scott, Kiran Jella · · India

This study analyzed the current status of wastewater generation, its uses, and livelihood benefits, particularly in agriculture, in India. It was based on national data and case studies from Ahmedabad, New Delhi, Hyderabad, Kanpur, and Kolkata. A lack of systematic data collection by municipalities makes it difficult to accurately assess wastewater generation or estimate the total urban area under wastewater irrigation.

Larissa Vásquez-Moreno, Ana Córdova y Vázquez · International Journal of Urban Sustainable Development · Mexico (San Cristobal de Las Casas)

This study developed a conceptual framework to assess urban agriculture's (UA) potential contributions to urban sustainability (US). The framework was applied to a qualitative analysis of UA practices in San Cristobal de Las Casas, Mexico. The study found a rich practice of UA in the city and that the framework was valuable for evidencing data and stimulating analysis. However, the study also discusses limitations of UA and further refinements needed for the framework to guide actions towards increasing UA's impact on urban sustainability.

Beaven Utete · Journal of Water Resources and Ocean Science · Zimbabwe

The ecological integrity of the peri-urban Chiraura River system in Zimbabwe was assessed through multivariate analysis of physicochemical parameters and the resident macroinvertebrate community. Monthly collections were conducted over five months from November 2011 to March 2012 at six sites, recording 1209 macroinvertebrates. Unsustainable anthropogenic activities, including industrial, domestic, and urban agricultural activities, were found to affect the water quality of the Chiraura River through run-off and increased effluent.

AN Asadu, EM Igbokwe, JM Chah, IA Enwelu · Journal of Agricultural Extension · Nigeria (Enugu)

This study investigated farmers' perceptions of health and environmental hazards from urban livestock keeping in Enugu Urban, Nigeria, interviewing 75 heads of households. While all respondents were aware of general health and environmental implications, only 4.0% knew livestock could cause climate change. Identified environmental issues included crop destruction (89.3%), urban filth (89.3%), and noise (88.0%), while health issues included disease spread (50.7%), accidents (46.7%), and bad smell (86.7%).

Wen-jiang Li, Linjun Li, Guoyu Qiu · Journal of Integrative Agriculture · China (Shenzhen)

Water and electricity-use patterns in Shenzhen, South China, were analyzed from 2001 to 2009. Water and electricity use per GDP in agriculture was the highest among sectors, indicating inefficiency. Traditional agriculture in Shenzhen will not be sustainable during urbanization and industrialization, except for high-tech intensive agriculture with low water and energy costs, and has been gradually substituted by industry, construction, residential life, and services.

Teferi Daba Lemma, M. S. A. Rao · · Ethiopia

This study assessed the social and environmental sustainability of urban and periurban agriculture (UPA) in selected towns of Ethiopia, using primary data from 280 households via questionnaires and interviews. The findings indicate that the environmental and health aspects of UPA sustainability are compromised by extensive use of chemical inputs. Furthermore, UPA is inclined to be unsustainable from a social and political perspective.

Maxine J. Levin · Soil Horizons · United States

This commentary highlights a growing demand for soil information for green economy initiatives and climate change adaptation over the last 25 years. Despite this, USDA's funding and technical support for soil surveys in urban and nonfarm areas have been inconsistent and, in some places, nonexistent. The author argues for the vital role of modern soil surveys in addressing current needs.

Anushiya Shrestha, Rajesh Sada · · Nepal (Kathmandu)

Climate change and its impacts on peri-urban agriculture were investigated in four peri-urban villages in the Kathmandu valley, Nepal. Temperature showed an increasing trend, while rainfall was erratic with no distinct pattern. These changes primarily had negative impacts on agriculture, leading to increased crop pests and diseases and a decline in crop production.