Research & reports

George Danso, Pay Drechsel, Olufunke Cofie · CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research) · Sub-Saharan Africa

A book chapter (in Parrot, Njoya, Temple, Assogba-Komlan, Kahane, Ba Diao and Havard, eds., "Agriculture and urban development in Sub-Saharan Africa: environment and health issues," L'Harmattan, 2008) addresses large-scale urban waste composting for urban and peri-urban agriculture in West Africa as an integrated approach to support municipal authority decision-making. The abstract provided is only the editorial citation, with no method or findings stated.

環境省 · 環境省 · Japan

In the Edo period, human waste and ash were stabilized hygienically in 'koidame' pits and traded to surrounding farms as fertilizer, sustaining a regional circular economy that kept cities clean. After WWII, land reform and the spread of chemical fertilizer left human waste with nowhere to go, prompting a shift from the Sanitation Law (1954) to the Waste Management Law (1970); municipal composting facilities built in the 1960s-70s were largely abandoned due to contamination, odor complaints, and the labor burden on aging farmers.

European Commission · European Commission — Directorate-General for Environment · Europe

This European Commission page on the Waste Framework Directive states the directive entered into force on 12 December 2008. It notes the EU generates around 2.5 billion tonnes of waste per year (roughly 5 tonnes per person annually). An amended version, effective 16 October 2025, includes food-waste reduction targets.

Olufunke Cofie, Gordana Kranjac-Berisavljevic, Pay Drechsel · Renewable Agriculture and Food Systems · Ghana

This study investigated the use of faecal sludge (FS) for crop production in Tamale and Bolgatanga, Ghana, involving 90 farmers and sanitation officials. 64% of farmers used FS to improve soil fertility and increase maize and sorghum yields. While perceived to reduce pathogens, 22% of farmers reported itching feet and foot rot after working with FS without protective footwear. Constraints included foul smell, transport issues, and public mockery, yet competition for FS existed due to its benefits.

Ron Sawyer, Anne Delmaire, Andrés A. Buenfil · · Mexico

A study shares initial experiences from TepozEco, a pilot program for holistic ecological sanitation planning in Tepoztlan, Mexico, which includes promoting ecological toilets, water demand and greywater management, rainwater harvesting, organic waste recycling, urban agriculture, and environmental education. The project's initial phase is described as encouraging, attributed mainly to an iterative, flexible, and responsive design process—adaptive planning—and a close network of partners and collaborators; while the local context is in some respects unique, particularly regarding institutional resources, local environmental awareness, and local government commitment, the municipality's socioeconomic conditions reflect those of much of Latin America, suggesting TepozEco could serve as an ecological sanitation model for a significant part of Mexico, Central America, and South America.

James R. Allen, Allen, James R. · AgEcon Search (University of Minnesota, USA) · United States

This study compared the feasibility of using composted yard waste and cow manure versus commercial fertilizer (10-10-10) as soil amendments for cool and warm season vegetable crops in urban gardens. Composted materials were applied at 44,800 kg/ha and fertilizer at 336 kg/ha. Most varieties produced yields equal to or greater in compost-amended plots than in fertilizer-treated plots, with significant varietal differences observed. For example, onion yields were 24% higher and tomato yields were 44% higher in compost-amended plots in specific experiments.

V. de M. Benites, F. B. Bezerra, R. O. Mouta, I. R. Assis, R. C. P. Santos, Mário Marcos Moreira da Conceição, Arthur Guerra de Andrade · · Brazil (Rio de Janeiro)

The composting process of grass clippings resulting from the maintenance of Rio de Janeiro International Airport's lawns was evaluated. This process was conducted in a protected environment, using grass clippings as the sole organic matter source, with treatments involving urea, natural phosphate, and pyroligneous acid. After 82 days, the compost was deemed mature, and results indicated the possibility of producing good quality organic fertilizers from grass clippings.

E. Mensah, Philip Amoah, Pay Drechsel, Robert Clement Abaidoo · CABI Publishing eBooks · Sub-Saharan Africa

This work, presented as case studies from Accra and Kumasi, addresses environmental concerns of urban and peri-urban agriculture. It focuses on waste composting for urban and peri-urban agriculture, aiming to close the rural-urban nutrient cycle in Sub-Saharan Africa.

I. Etuah-Jackson, W. P. Klaassen, J. A. Awuye · CABI Publishing eBooks · Ghana (Accra)

This paper reports on solid waste management in Accra, Ghana, examining the experiences of two compost plants, Teshie-Nungua and Ashiedu Keteke (AKCPP), with urban waste composting. It also describes the urban farming systems in Accra and identifies current and potential users of the produced compost.

Jens Færge, Jakob Magid, F.W.T. Penning de Vries · CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research) · Sub-Saharan Africa

This 2001 entry from CGSpace references a publication titled "Waste composting for urban and peri-urban agriculture: closing the rural-urban nutrient cycle in Sub-Saharan Africa." The publication, edited by Drechsel and Kunze, focuses on waste composting to manage nutrient flows between rural and urban areas in Sub-Saharan Africa.

Pay Drechsel, D. Kunze · CABI Publishing eBooks · Sub-Saharan Africa

A chapter in Drechsel and Kunze (Eds.), 'Waste Composting for Urban and Peri-Urban Agriculture: Closing the Rural-Urban Nutrient Cycle in Sub-Saharan Africa' (CABI Publishing; IWMI; FAO), addressing research and development priorities. The abstract provides no further detail beyond this citation.

· 法令（e-Gov法令検索・412AC0000000116） · Japan

The 2000 Food Recycling Act, pushing food businesses to reduce waste and recycle it into feed and fertiliser. Sets per-industry recycling targets and certifies 'recycling loop' plans — the legal frame for running food-scrap composting as a business.

C. C. Weir, James R. Allen · Journal of Environmental Science and Health Part A Environmental Science and Engineering and Toxicology · United States (New York City)

In the District of Columbia, tomato (Lycopersicum esculentum) and mustard (Brassica juncea) grown on a low-pH, compacted silt-loam soil were compared under plots treated with composted sewage sludge and composted yard waste versus plots receiving commercial N-P-K fertilizer. Yields were generally significantly higher in the compost-treated plots than in the commercial fertilizer plots. Chemical and physical soil analyses showed the composted organic amendments not only improved the compacted soil's poor physical properties but also significantly increased soil pH, organic matter content, and available phosphate and magnesium. Chemical analysis of the edible plant portions for heavy trace metals such as lead and cadmium found levels not high enough to raise health concerns, remaining within ranges established as acceptable by other researchers.

Ishwarbhai C. Patel · Journal of Agricultural & Food Information · United States (Newark)

The Rutgers Urban Gardening (RUG) program in Newark, New Jersey, transformed 30 acres of wasteland into 1,900 food gardens in 1994, engaging 6,500 residents. This initiative produced over $915,000 worth of food and recycled nearly 4,000 tons of city leaves, saving participants approximately $4 million over five years. The program also fostered social interaction, improved diets for 44% of participants, and enhanced neighborhoods.

Sandra A. Balch, D. L. Auld · HortScience · Global

This article discusses methods for communicating composting information to the public, noting that many potential composters lack expertise, information, and support. It finds that hands-on instruction and active involvement in ongoing programs, as well as integration into established programs like community gardens, are effective methods for conveying composting information.

Lee M · PubMed · Ethiopia

In Ethiopia, urban agriculture faces significant challenges due to government disapproval of public land use for farming and difficulty in obtaining credit. A 1983 survey in Addis Ababa found that 17% of 1352 households produced their own food on less than 25 sq. meters, with 90% of non-farmers citing lack of land. Despite urban agricultural cooperatives demonstrating 70% higher member income, their lack of government legalization prevents access to loans for productivity improvement.

Rodale Institute · Rodale Institute · United States

A long-running comparative farming trial launched by Rodale Institute in 1981, comparing conventional (synthetic nitrogen fertilizer and herbicides), organic legume, and organic manure systems across 72 plots for over 40 years. In drought years, organic corn yields are reported to be 31% higher than conventional, and water infiltration rates are significantly faster under organic management.

Rodale Institute · Rodale Institute · United States

The Rodale Institute's history page. J.I. Rodale and his wife Anna bought a 63-acre farm in Emmaus, Pennsylvania in 1940 to begin experimenting with organic agriculture, and founded the Soil and Health Foundation (later renamed Rodale Institute) in 1947. In 1948 the book 'Pay Dirt' argued that chemical agriculture was linked to declining public health.