Research & reports

· Wikipedia · Global

This Wikipedia article on 'metabolic rift' explains that German agricultural chemist Justus von Liebig, in his 1840 'Organic Chemistry in its Application to Agriculture and Physiology,' argued that if all solid and liquid excreta of city inhabitants were returned to farmers, land productivity could be maintained for centuries virtually unimpaired. Marx, combining his understanding of the labor process with Liebig's analysis, wrote in Capital Vol. 1 that capitalist production, by concentrating population in cities, 'disturbs the metabolic interaction between man and the earth' and prevents the return of soil constituents consumed by humans as food and clothing — defining this as 'an irreparable rift in the interdependent process of social metabolism.' John Bellamy Foster, in his 2000 book 'Marx's Ecology: Materialism and Nature,' reassessed Marx's ecological perspective, arguing the metabolic rift concept enabled the development of a critique of environmental degradation. The article notes that as food and fiber were transported over long distances, soil nutrients moved to cities as agricultural produce but were not returned as human and animal waste, producing 'a one-way flow of materials' — a plundering of the soil to sustain society's reproduction.

· Wikipedia · Japan

This Wikipedia article on night soil describes how, in the city of Edo, compost merchants gathered feces to sell to farmers, and that human excreta of rich people were sold at higher prices because their better diet presumably left more nutrients in it. Various historic documents detailing toilet-waste disposal procedures date from as early as the 9th century. The article states that after World War II the practice declined rapidly due to sanitation concerns and the spread of chemical fertilizer, and that today less than 1% of human waste is used for night soil fertilization.

· Wikipedia · Europe

This Wikipedia article on allotment gardening covers its history and national systems. In the United Kingdom, an 1809 engraving of Birmingham already shows allotment gardens surrounding the town, and the 'Great Somerford Free Gardens' in Wiltshire were founded in 1809; the 1908 Small Holdings and Allotments Act legalized allotments, amended in 1922 and 1950, with plot numbers rising from 244,268 in 1873 to a peak of about 1.5 million in 1918 before declining to roughly 300,000 by 2009. In Germany, 'Schrebergarten' plots trace to the 'Schreber movement' begun in Leipzig in 1864, formalized by the 1919 Small Gardens and Small Leaseholds Land Law; there are now about 1.4 million allotments covering 470 square kilometers, including 833 allotment complexes in Berlin alone. In France, family gardens that emerged in the late 19th century are managed by the 'Fédération Nationale des Jardins Familiaux et Collectifs,' with about 135,000 members. In the Netherlands, the article states the first allotment garden was founded in 1838, there are now 240,000 allotment gardens, and the 'Algemeen Verbond van Volkstuindersverenigingen in Nederland' (AVVN) was founded in 1928.

· Wikipedia · Europe

This Wikipedia article on 'city farm' states that an early city farm was set up in 1972 in Kentish Town, London, combining farm animals with gardening space — a combination inspired by children's farms in the Netherlands — and that other city farms followed across London and the United Kingdom. The article does not, however, provide further detail on the origin or history of the Dutch children's farms (kinderboerderij) themselves.

Stichting DakAkker · Stichting DakAkker (official) · Netherlands

The official site of DakAkker, a rooftop farm on top of the Schieblock building in Rotterdam. It describes itself as a 1,000-square-meter rooftop farm growing vegetables, edible flowers, and fruit and keeping bees, calling itself the largest open-air rooftop farm in the Netherlands and one of the largest in Europe. It is presented as an initiative of ZUS (Zones Urbaines Sensibles) and the Rotterdam Environmental Centre together with Optigrün Benelux and binder daktuinen, framed as part of Rotterdam's first city initiative 'de Luchtsingel.' The roof also hosts 'Slimdak,' a test site for smart rainwater management. 'Dakennie,' its environmental education program for Rotterdam primary schools, is financially supported by Watersensitive Rotterdam, the City of Rotterdam's nature and environmental education division, and the Hoogheemraadschap Schieland en de Krimpenerwaard water authority. The page itself does not state an opening year, which could not be confirmed here.

· Wikipedia · Netherlands

The URL 'Agriculture in the Netherlands' redirects to Wikipedia's general 'Netherlands' article. Despite being a densely populated country of 41,850 km2 and over 18 million people, the article states the Netherlands is the world's second largest exporter of food and agricultural products by value, owing to its fertile soil, mild climate, intensive agriculture, and inventiveness.

· Wikipedia · Netherlands

A floating dairy farm in the harbour of Rotterdam, described by its founders Peter and Minke van Wingerden as the world's first. It opened on May 13, 2019 with 32 cows, with plans to grow to 40. It is designed to use residual city products such as park grass and food waste to feed the animals, processes raw dairy into milk and yoghurt onsite for distribution in the city, and returns cow manure as fertilizer for public spaces. All power comes from solar panels, rainwater is collected on the roof, and milking, manure cleanup, and feeding are largely automated.

· Wikipedia · United States

A Wikipedia article on FarmBot, an open source precision agriculture CNC farming project. Started in 2011 by Rory Aronson while studying mechanical engineering at California Polytechnic State University, he began working on it full-time from March 2014 with a grant from the Shuttleworth Foundation. Tim Evers and Rick Carlino joined as core developers. It was a Hackaday Prize finalist in 2015, and after nine design iterations the commercial FarmBot Genesis began preorders in July 2016. It uses the OpenFarm crop database to create optimal planting plans.

· Wikipédia (français) · France

French Wikipedia entry on 'jardin ouvrier' (workers' garden), tracing origins to Félicie Hervieu's initiative in Sedan (1889), Abbé Lemire's 1896 league, the rapid growth of gardens in the Paris region from 48 in 1904 to 1,515 in 1913, and a nationwide total of 250,000 gardens by the end of World War II. The law of 26 July 1952 formalized the term 'jardins familiaux'.

· Wikipedia (English) · Singapore

English Wikipedia entry on agriculture in Singapore. The country imports about 90% of its food. The 2019 'Singapore 30 by 30' goal (30% of nutritional needs grown locally by 2030) was revised in November 2025 into a new target of 20% for produce like leafy vegetables and 30% for protein (including seafood and eggs) by 2035. As of 2024, there were 225 farms (153 land-based, 72 sea-based) with total production value of S$231 million.

· Wikipedia · Singapore

This Wikipedia article on Lim Chu Kang, a 17.3 km2 area in Singapore's North Region, describes it as the nation's main agricultural zone, housing a diverse range of farms engaged in food production, aquaculture, and agri-technology. Approximately 62 farms operated in the western part before being cleared progressively from April 2020 to December 2022 for military development. As of 2025 the area had a population of only 30, one of Singapore's least populated planning areas.

· Wikipedia · United States

This Wikipedia article on Seattle's P-Patch community garden program states the name derives from the Picardo family farm in the Wedgwood neighborhood. It reports about 90 P-Patch locations around the city, which in 2023 donated a total of 33,438 pounds (15,167 kg) of produce to food banks and meal programs. It also describes a 25,000-square-foot (2,300 m2) P-Patch on the roof of a Mercer Street parking garage at Seattle Center, opened in 2012, whose planned 2020 closure was averted following public protest.

· Wikipedia · United States

This Wikipedia article covers the Liz Christy Garden, described as the first and oldest community garden in New York City. In 1973 Liz Christy founded the Green Guerillas and petitioned the city for access to a vacant lot for $1 a month; the garden was officially created in 1974. Located at the corner of the Bowery and Houston Street in Manhattan, it is now managed by about 20 volunteer gardeners. It was renamed in Christy's honor after her death in 1985, became a legally protected community garden in 2002, and was included in the Bowery Historic District on the National Register of Historic Places in 2013.

農林水産省 · 農林水産省 · Japan

This Ministry of Agriculture, Forestry and Fisheries (MAFF) page explains Japan's key laws on citizen farms. The Act on Special Measures Concerning the Lending of Specified Farmland, enacted in 1989, created Farmland Act exceptions for short-term lending of small subdivided plots, and a 2005 amendment allowed entities other than local governments and agricultural cooperatives to open citizen farms. The Act on Promotion of Citizen Farm Development, enacted in 1990, promotes farms equipped with facilities such as tool sheds and rest areas, while the 2018 Act on Facilitation of Lending of Urban Farmland makes it easier to lease urban farmland (productive green land) for citizen farms.

· Wikipedia · United States

This Wikipedia article covers sociologist Ray Oldenburg's concept of the 'third place,' proposed in his 1989 book The Great Good Place. A third place is a social space separate from home ('first place') and workplace ('second place'), with examples including churches, cafes, bars, libraries, and parks. It outlines Oldenburg and Christensen's seven characteristics—accessibility, comfortable atmosphere, convenient location, unpretentiousness, established regulars, conversation focus, and lighthearted mood—and argues these spaces matter for democracy, civic engagement, and a sense of place.

· Wikipedia · Germany

Moritz Schreber (1808–1861) was a German medical doctor and university lecturer born in Leipzig, who became director of the Leipzig Heilanstalt in 1844 and wrote about children's health and the social effects of urbanization. The eponymous 'Schreber movement' arose only after his death; the first Schrebergarten was established in 1864 by Leipzig school principal Ernst Innozenz Hauschild, who leased land for children's physical exercise.

· Wikipedia (de) · Germany

German Kleingärten (allotment gardens) trace back to early-19th-century 'poor gardens' (Armengärten), with the first Schreber plot opened in Leipzig's Johannapark in 1865. Today about 15,000 clubs organized under 20 state federations and the national umbrella BKD manage roughly 867,092 registered plots, out of over 1 million plots nationwide covering about 46,000 hectares. The average plot size is 370 m²; as of 2008 the average transfer fee was €1,900 (€3,300 in large cities), average annual cost was €373, and the average user age was 60.

· Wikipedia (de) · Germany

Germany's Federal Allotment Garden Act (BKleingG) was enacted on 28 February 1983 and took effect 1 April 1983 (last amended 19 September 2006, effective 1 October 2006). A Kleingarten must not exceed 400 m², and a garden shed (Gartenlaube) may be at most 24 m² including a covered terrace and must not be suitable for permanent habitation. Federal Court of Justice (BGH) case law holds that at least one third of the plot area must be used for growing garden produce for personal consumption, and that a Kleingarten site must comprise at least five individual plots.

· Wikipedia (de) · Germany

Prinzessinnengärten was founded by the non-profit 'Nomadisch Grün' in July 2009 and operated an urban farm at Moritzplatz in Berlin-Kreuzberg (between Prinzenstraße and Oranienstraße), on roughly 6,000 m² of land that had lain fallow for over 60 years. Within a month of opening it had 100 growing beds, later expanded by 300 more, using a mobile container-based structure with plants grown in recycled bread crates, Tetra Paks, and rice sacks. It kept four beehives from September 2009, opened a garden café in 2010, expanded a garden kitchen in 2011, and won the Utopia Award in 2010.

· Wikipedia (de) · Germany

The city of Andernach's 'Edible City' (Essbare Stadt) project plants vegetables, fruit, and grain on municipal green spaces under the motto 'picking allowed' (Pflücken erlaubt), letting residents harvest freely. It was first presented in 2010 at the federal 'Entente Florale' competition, where Andernach received several awards, and was subsequently extended to further areas in the city center, along the old city wall, and near the train station.

Food and Agriculture Organization of the United Nations (FAO) · FAO · Global

An overview of FAO's 'City Region Food Systems' (CRFS) approach under its Food for the Cities Programme, which frames all actors, processes and relationships involved in producing, processing, distributing and consuming food as linking urban centres with their surrounding rural and peri-urban areas, aiming to improve economic, social and environmental sustainability with an emphasis on supporting local government policy shifts.

ByBi · ByBi · Norway

An introduction to 'The Pollinator Passage', launched in 2015 by Oslo beekeeping organization ByBi with funding from the Norwegian Environment Agency, mobilizing citizens to create flowering 'stepping stones' across the city — from large flowering farming areas to balcony flower pots — to build urban pollinator habitat. Since its launch, Norway has adopted a National Pollinator Strategy, Oslo has established an Urban Agriculture Program and a roof/facade greening strategy, and ByBi now manages pollinator-friendly practices in the city's cemeteries and the three royal gardens of Oslo.

Buglife · Buglife · United Kingdom

An introduction to Buglife's 'B-Lines' initiative, which states that over 97% of the UK's flower-rich grasslands (an area the size of Wales) have been lost since the 1930s, and describes a nationwide network of flower-rich habitat 'stepping stones' linking existing wildlife areas across the countryside and towns. B-Lines have been mapped across England, Wales, Northern Ireland and Scotland, with a target to create and restore at least 150,000 hectares of flower-rich habitat across the UK.

東京都産業労働局 · 東京都産業労働局 · Japan

The official page of the Agriculture, Forestry and Fisheries Division of the Tokyo Metropolitan Bureau of Industrial and Labor Affairs. The division describes its role as promoting production and infrastructure development in agriculture, forestry, and fisheries to raise profitability, while also providing spaces for education and recreation and contributing to countermeasures against global warming; the page links to related policies, press releases, and statistics for agriculture, fisheries, and forestry.

株式会社アグリメディア · 株式会社アグリメディア · Japan

The official site of 'Sharebatake', a members-only rental farm plot service operated by AGRIMEDIA Co., Ltd. Seeds, seedlings, fertilizer, and tools are provided on-site with experienced advisors on hand, letting members show up 'empty-handed'. It operates nationwide across regions including Tokyo, Kanagawa, Chiba, Saitama, Aichi, Osaka, Hyogo, Kyoto, and Fukuoka, with about 118 farm sites and roughly 15,138 plots as of end of July 2026.