Research & reports

Gang Wang · Agricultural History · China (Shanghai)

This historical analysis of Shanghai's vegetable supply system examines the limitations of peri-urban agriculture. In the early 1950s, Shanghai relied on distant rural areas for vegetables, shifting to suburban production in 1958 after rural sources were cut off. Efforts to sustain this suburban-centric system faced challenges, and government attempts to phase out the planned economy in the 1980s had limited effect. By the early 1990s, the suburban-centric system was abandoned, leading to a return to nonlocal vegetable predominance.

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.

Agrian Rizki Kuswanto, Zaenal Sirajuddin, Ahda Mulyati · Technium Social Sciences Journal · Indonesia

This study analyzed the degradation of interest in grape cultivation in Boyaoge Village, Indonesia, from the perspective of architecture and urban agriculture. Using field observations, interviews with local farmers, and spatial analysis, the findings indicated that the main causes were the shift in land use from agriculture to settlements, a lack of infrastructure support such as efficient irrigation systems and market accessibility, and non-agricultural-friendly spatial designs including limited green open spaces and limited use of agricultural technology. These factors contribute to the decline in grape cultivation interest.

Katie J. Field, Yolima Carrillo, Stuart A. Campbell, Jurriaan Ton, Adam Frew · Plants People Planet · Global

This special issue presents an innovative framework for sustainable land use, leveraging synergies between plants, soils, and societies to address global environmental crises and food insecurity. It notes that human activities, including land clearing for agriculture, rapid urban sprawl, and heavy use of chemical inputs, have pushed biogeochemical cycles of carbon, nitrogen, and phosphorus beyond their safe operating limits. The collection of papers collectively emphasizes the need for a fundamental shift in managing plant, soil, microbes, and human systems as interdependent components.

Charlotte Gallagher, Daniel López-García, Parisi, Anton, Cuevas, Soledad · Zenodo (CERN European Organization for Nuclear Research) · Europe

An outcome report from strategic workshops in Valladolid, Flanders, and Wrocław, engaging 33 diverse local stakeholders, assessed key policy and governance challenges facing urban agriculture. The most urgent and actionable priority identified across all three regions is the lack of coordination and knowledge sharing, underscoring a critical need to build resilient urban agriculture coalitions. To address broader structural issues like land access, stakeholders emphasized bridging the urban-rural divide, overcoming political short-termism, and establishing a shared understanding of urban agriculture's multifunctionality.

Yang Hua, Yong Xu, Kan ZHOU, Jie FAN · 资源科学 · China

This study analyzed the spatiotemporal patterns of supply and demand for seven major agricultural products in the Beijing-Tianjin-Hebei (Jing-Jin-Ji) region from 2015 to 2022. It found that the region faces a dual risk of agricultural product supply-demand imbalance and spatial mismatch, with an overall surplus but local shortages. Specifically, Beijing and Tianjin generally lack self-sufficiency in agricultural products. The research proposes an integrated layout plan for high-quality agricultural bases to address these imbalances and ensure regional food security.

Elías Machado · Editora Científica Digital eBooks · Brazil (Guarapuava)

This study examines the relationship between climate change, urbanization, and urban and peri-urban agriculture in Guarapuava-PR, Brazil. It emphasizes how regional atmospheric variability intensifies existing socio-environmental vulnerabilities. Guarapuava's climate, characterized by high thermal amplitude, frequent frosts, and irregular rainfall, significantly conditions agricultural production systems, especially in urban and peri-urban areas, negatively affecting productive cycles.

Nicolás Carrasco-Astudillo, Juan José Medina-Musellas, Kàtia Gaspar, Marta Gangolells, Miquel Casals · Building and Environment · Spain (Catalonia)

This paper evaluates rooftop agrivoltaic systems integrating urban agriculture, photovoltaic generation, and rainwater collection for building resilience and water-energy-food synergies. Tested via EnergyPlus simulations in a reference residential building across nine climate zones in Catalonia, Spain, the strategy showed climate-dependent benefits. The most consistent performance was in the Csa climate (Barcelona), demonstrating robust reductions in energy demand, emissions, and discomfort hours under current and future climate scenarios.

Warvan Barzani · REAL CORP Repository (University of Southampton) · Asia

This paper examines Erbil, capital of the Kurdistan Region of Iraq, as a case of medium-sized-city urban transformation, using planning documentation, project descriptions and spatial development interpretation to ask whether green infrastructure elements such as Sami Abdulrahman Park and the Orbital Green Belt Project function only as environmental enhancement or also as instruments of spatial governance within Erbil's updated master-planning framework, which introduces growth boundaries, zoning reforms, density regulation and environmental overlays amid pressure on peri-urban agricultural land from two decades of demographic and spatial expansion.

Alfiya Rokhmah, Ririn Mulyani, Muhammad Yusuf Hamdhani, Doni Doni · Jurnal Keteknikan Pertanian · Indonesia

At Universitas Sains Indonesia in Cibitung subdistrict, Bekasi Regency, Indonesia, researchers designed an urban farming layout to increase green open space on limited campus land. Using a mixed-method approach combining site analysis, field observation, facility-relationship analysis and economic feasibility estimation, the proposed design combines an aquaponic system (a 1,000-liter fish tank linked to hydroponic pipes with 120 planting holes), a vertical farming system adding 60 planting holes, and a green-learning park. The initial investment was estimated at approximately Rp 12,270,000 with relatively low operating costs, and the system was projected to yield 37-45 kg of vegetables per month and 30-40 kg of fish per production cycle.

Tianqi Su, Yongmei · Agriculture · China

Based on multitemporal remote-sensing data from 1985 to 2015, this study examined the evolution of urban-agricultural-ecological spatial structure and water-heat-vegetation responses driven by large-scale irrigation and drainage projects in the Inner Mongolia Hetao Plain, an arid/semi-arid region of China. It built a "multifunctionality-dynamic evolution" dual-principle classification system, combining maximum-likelihood classification of individual land types with conflict-pixel-resolution merging to achieve 90.82% classification accuracy, and used a land-use transfer matrix, a standard deviation ellipse model, land surface temperature (LST) inversion, and vegetation fractional coverage (VFC) analysis. The results showed: (1) spatial structure followed a path of short-term intense disturbance followed by long-term stable optimization, with agricultural space stability increasing 4.8%, ecological core area retention exceeding 90%, and urban space expansion shifting from external encroachment to internal filling; (2) VFC increased steadily in the central area (0.8% annual growth), fluctuated with recovery in the eastern area (±12% cyclic amplitude), and improved locally in the western area (key patches up 18%); (3) the LST-VFC relationship showed spatiotemporal misalignment, with 0.8-1.2°C anomalous cooling in the central region during construction despite a 15% VFC decrease, driven by irrigation water's thermal inertia, and a disrupted linear correlation after completion due to changes in crop phenology and plastic film mulching; and (4) the irrigation and drainage projects optimized water resource allocation, constructing a hub regulation model integrated with the Water-Energy-Food (WEF) Nexus.

国土交通省都市局 · 国土交通省 都市局 都市計画課・公園緑地・景観課 · Japan

MLIT's Urban Bureau guide (April 2026 edition) explains the Productive Green Zone and Special Productive Green Zone systems and the municipal designation procedure. Productive Green Zones require at least 500 m² of urbanization-area farmland (reducible to 300 m² by local ordinance); as of 31 December 2025, 52,955 zones covering 10,613 ha were designated nationwide. Special Productive Green Zone designation must occur before the 30-year mark from the original zoning notice; once designated, the earliest date an owner can request a buyout is deferred by 10 years, renewable repeatedly with owner consent. In the three major metropolitan areas, parcels not redesignated shift to residential-land property taxation via a phased relief schedule (0.2/0.4/0.6/0.8 of the tax base increase in years one through four).

東京都都市整備局 · 東京都都市整備局 · Japan

This official page from the Tokyo Metropolitan Bureau of Urban Development (last updated May 26, 2026) explains Tokyo's productive green zone (seisan ryokuchi) system: designation requires a plot of at least 500 sqm (reducible to 300 sqm by municipal ordinance, with contiguous plots eligible if each is at least 100 sqm), imposes a 30-year farming obligation, and grants tax benefits (agricultural-rate property tax and inheritance tax deferral). It also explains that because zones designated in 1992 under the revised law reached the 30-year mark in 2022, the "specified productive green zone" system (created by a 2017 law amendment) allows landowners to extend the tax benefits and buyback-request window by another 10 years.

国土交通省 · 国土交通省 · Japan

This Ministry of Land, Infrastructure, Transport and Tourism (MLIT) page is an index of PowerPoint-format reference materials on Japan's city planning system, organized by topic — planning law and structure, land-use planning (including the urbanization-promotion/control-area division and district plans), urban facility planning, urban greening (including farmland conservation), development permits, and location optimization. Details of specific systems, including the urbanization area/control area division, reside in the linked documents rather than on the page itself.

国土交通省 · 国土交通省 · Japan

This MLIT page indexes data resources on urban farmland in Japan — current farmland area (including area within urbanization-promotion zones and productive green space), the list of designated cities in the three major metropolitan areas subject to special urban farmland rules, the status of productive-green-space designations, area trends over time, and designation status of 'specified' productive green space, most updated as of end-December Reiwa 7 (2025). The specific figures themselves reside in the linked source documents, not on this index page.

Montgomery Planning (Maryland-National Capital Park and Planning Commission) · Montgomery Planning · United States

Montgomery Planning's overview of the Agricultural Reserve, created in 1980 by Montgomery County Council action and covering 93,000 acres — nearly a third of the county's land. The Reserve combines dedicated agricultural zoning (limiting residential density to one unit per 25 acres in the AR zone), a transfer of development rights (TDR) program, and a Building Lot Termination (BLT) easement program to prevent farmland fragmentation, sustaining more than 500 farms.

Oregon Department of Land Conservation and Development (DLCD) · State of Oregon, Department of Land Conservation and Development · United States

Oregon's state land-use agency page explaining the state's farmland protection framework. Statewide Planning Goal 3, established under Senate Bill 100, defines agricultural land based on soil capability, and all 36 counties apply Exclusive Farm Use (EFU) zoning, with minimum lot sizes typically 80 acres for cropland and 160 acres for rangeland. As of 2015, Oregon's farmland totaled 16.3 million acres (over 26% of the state), with the farm economy valued at $5.7 billion, about 11% of the state economy, supporting more than 326,000 jobs.

Neighborhood Gardens Trust · Neighborhood Gardens Trust (NGT) · United States

Neighborhood Gardens Trust (NGT), a Philadelphia nonprofit, is a land trust that makes community garden land tenure permanent. It has preserved 53 community gardens so far and aims to protect a total of 80 by 2027. Preserved gardens range from single house lots up to 3.7 acres, the largest, and vary from food-producing plots to flower and sitting gardens. NGT covers ongoing liability insurance, real estate taxes, and capital improvements (with support from the Pennsylvania Horticultural Society), while local gardeners keep managing the day-to-day.

農林水産省 · 農林水産省 農村振興局農村政策部農村計画課都市農業室 · Japan

Japan's Ministry of Agriculture, Forestry and Fisheries (MAFF) organizes urban agriculture's roles into six functions: fresh produce supply, farming-experience/exchange opportunities, disaster-prevention open space, green/landscape space, national land and environmental conservation, and food/agricultural education. In a survey of urban residents, about 50% recognized urban farms' role in supplying fresh produce and about 60% expressed interest in buying local produce, while only about 30% saw urban farms as a place for farming experience or exchange. 'Disaster cooperation farmland' — an arrangement re-recognized after the 1995 Great Hanshin-Awaji Earthquake — involves municipalities signing voluntary agreements with farmers to use urban farmland as evacuation space or temporary-housing sites during disasters.

· Wikipedia (English) · Spain

According to English Wikipedia, the Water Tribunal of the Plain of Valencia was founded during the reigns of the Caliphs Abd-ar-Rahman III and Al-Hakam II, in 960 CE, as an institution of justice to settle disputes over irrigation water. It is made up of one representative (síndic) from each of nine Irrigation Communities, one of whom serves a two-year term as president. It meets every Thursday at Casa Vestidor on Plaça de la Mare de Déu in Valencia, and in 2009 was inscribed by UNESCO as intangible cultural heritage alongside the Council of Wise Men of the plain of Murcia.

· Wikipedia (español) · Spain

A Wikipedia article on the Huerta de Valencia, the historic agricultural belt surrounding the city of Valencia. Origins trace to Roman settlement, but the irrigation infrastructure that shaped the current landscape was developed during the Al-Andalus (Islamic) period. Nine major irrigation canals (acequias), including Quart and Mestalla, are governed by the Tribunal de las Aguas de Valencia, inscribed on UNESCO's Intangible Cultural Heritage list.

· Wikipedia (English) · Spain

An English-language Wikipedia article on the Horta of Valencia, the historic agricultural area surrounding metropolitan Valencia, covering 631.9 km2 with a 2019 population of 1,567,118. Its traditional Arab-era irrigation system was designated a FAO Globally Important Agricultural Heritage System (GIAHS) in 2019 as the 'Historical Waterscape of l'Horta de Valencia.'

· Wikipedia (italiano) · Italy

An Italian Wikipedia article on Parco Agricolo Sud Milano, established on 23 April 1990 under Lombardy regional law (LR 24), covering 46,300 hectares across roughly 60 municipalities. More than 1,400 farms operate within the park, with cereals accounting for 43% of cultivation, rice 22%, and forage 16%. Forty-one traditional irrigated meadows (marcite) are protected within the park, alongside native mammals, birds, reptiles, amphibians and fish, plus reported invasive species such as nutria.

· Wikipedia (italiano) · Italy

An Italian Wikipedia article on the cascine (traditional farmsteads) of Milan, of which about a hundred survive today, 59 of them municipally owned. Eighteen are derelict, while the rest are used as libraries, recreation centres, facilities for the elderly and disabled, or housing; thirteen remain active farms engaged in rice cultivation, dairy farming, or horse breeding. The oldest, Cascina Chiesa Rossa, dates to the 10th century, with other major cascine built between the 11th and 15th centuries.

三鷹市 · 三鷹市 · Japan

Mitaka City's greening subsidy covers up to half the actual cost of rooftop greening work, capped at 20,000 yen per square meter (with a combined cap of 1 million yen for rooftop and wall greening together). Wall greening is subsidized up to 10,000 yen per square meter, and street-facing greening up to 14,000 yen per meter. Applicants must obtain approval before starting work, and sites that received the subsidy within the past five years are ineligible.