Research & reports

Sarah Legg · Figshare · United States (Wyoming)

ACRES Student Farm, a University of Wyoming organization, has grown significantly over six years, providing local produce, CSA shares, composting, and educational opportunities. However, the farm suffers from continuous losses in efficiency and acquired knowledge due to the transient nature of its student management and workforce, leading to unsustainable internal functioning. This project aims to develop a management plan and handbook to address these issues and improve the farm's operational efficiency.

Travis P. Marcotte · Journal of Agricultural & Food Information · United States

An article based on a speech by Travis Marcotte, Executive Director of the Intervale Center in Vermont, USA, recounts the Center's innovation and leadership over more than 25 years, spanning agricultural land reclamation, Community Supported Agriculture, riparian restoration, and large-scale composting through to farm incubation, food hubs, and community celebrations of local food. It also describes the Center's response to climate change, environmental healing, and efforts to connect people with good food and the benefits of a healthier food system.

Maria Lúcia da Silva Sodré, Aucéia Matos Dourado, Daiane Santos Oliveira, Vanessa Januário Graça · · Brazil

A report on a rural extension project developed around a community garden run by a women's association in Brazil, based on agroecological principles that center on exchanging traditional, technical and scientific knowledge as a means of interaction between the university, advisors and family farmers. The aim was to strengthen social organization and production processes by combining composting and vermiculture practices with technologies such as irrigation systems and cisterns, using theoretical and practical workshops. Results showed that these activities enabled families to increase production and gain access to healthier food; the resulting availability of produce for sale brought increased income and improved living conditions, along with improved soil quality, outcomes the report attributes in part to the organizational capacity of the women involved in the association.

Ian Schneier, R. C. Payne, Duong Nguyen, Liam Goodale · Digital WPI · United States

At Worcester Polytechnic Institute (WPI) in the United States, the Floragenesis project proposed a campus community garden using food waste otherwise neglected from the dining halls to address concerns about freshness and localness. Over time, the composting component was intended to phase out the practice of exporting food waste from the main dining halls. The project focused on construction, productivity, and community garden management, drawing on prior WPI-specific composting feasibility studies. It won Judge's Winner at a 2014 poster presentation.

Alisson Amorim da Silva, Sammy Sidney, Rocha Matías, Rafaela Ribeiro de Souza, Roberto Lustosa Silva, Júlio César Azevedo Nóbrega · · Brazil

The effect of different percentages of cattle manure (0%, 20%, 40%, and 60%) on millet development was evaluated in a greenhouse at the community garden of Corrente city hall, Brazil. The percentage of cattle manure significantly affected the number of leaves, plant height, shoot dry mass, and main root length. A manure dose equivalent to 40% of the total substrate volume was found to provide nutrient amounts closer to the ideal for achieving maximum efficiency in millet's physical variables.

Germano Laurentino da Cunha, Adriana Celi Alves Martins, Maria José Araújo Wanderley, Raunira da Costa Araújo, Terezinha Domiciano Dantas Martins, Francisca Alexandre de Lima · Cadernos de Agroecologia · Brazil (Solânea)

This project aimed to establish organic vegetable gardens in public elementary and high schools in Solânea, Paraíba, Brazil. Funded by CNPq, the initiative involved installing 14 garden beds with various vegetables in each participating school. Students received mini-courses on organic vegetable production, and participated in making compost and biofertilizers. The target audience demonstrated receptiveness and support for the work.

Josh Beniston · The Knowledge Bank (The Ohio State University) · United States (Ohio)

An experiment on assessing and managing soil quality for urban agriculture was conducted during the 2011 and 2012 growing seasons on demolished vacant urban lots in Youngstown, Ohio. Soil compaction was identified as a primary constraint, with high bulk density values of 1.79 g cm⁻³ for in-ground plots and 1.55 g cm⁻³ for raised beds. Crop yield data from 2011 showed that both compost-amended and compost + biochar-amended plots had significantly greater crop yields than control plots, with compost + biochar plots achieving the highest harvest index values.

Alisson Amorim da Silva Aguiar, Sammy Sidney Rocha Matías, Ribeiro Sousa, Rafaela, Roberto Lustosa Silva, Júlio César Azevedo Nóbrega · Dialnet (Universidad de la Rioja) · Brazil (Corrente)

This study evaluated the development of pearl millet on soils with different levels of manure in Corrente, Piauí, Brazil. Conducted in a greenhouse, the experiment used a completely randomized design with four manure percentages (0%, 20%, 40%, 60%) and three replications. Cattle manure significantly affected the number of leaves, plant height, shoot dry mass, and main root length, with the 40% manure dose showing nutrient levels closest to ideal for maximum efficiency.

Kristen McIvor, Craig Cogger, Sally Brown · Compost Science & Utilization · United States (Tacoma)

A study in Tacoma, Washington, evaluated the effects of two biosolids-based soil products, Tagro and GroCo, on soil physical and chemical properties in three urban community gardens over two growing seasons. Amendments were applied at 200 Mg ha−1 dry weight in the first year, with half receiving an additional 200 Mg ha−1 in the second year. Biosolids did not significantly affect total soil metal concentrations, but increased water infiltration rates from 10.1 ± 0.95 ml min−1 to 51–212 ml min−1, decreased bulk density from 1.07 ± 0.01 g cm−3 to 0.51–0.77 g cm−3, and increased total carbon, nitrogen, and available phosphorus. Biosolids addition also decreased soil pH from 6.43 to 5.35–5.75.

Ácacio Figueirêdo Neto, Silvana Belém de Oliveira, Marcos Santos Lima, Mariana Rocha Amorim, Raquel Mota Figueiredo · Revista Semiárido De Visu · Brazil (Petrolina)

This study evaluated the effect of organic compost on the cultivation of "Brasília" carrots and their post-harvest characteristics in a community garden in Petrolina, Brazil. Experiments used compost made from 40% cured goat manure and 60% plant residues. Carrots were harvested 92 days after sowing and analyzed for moisture, soluble solids, titratable acidity, carotenoids, and pulp firmness. Statistical analysis showed significant differences in key physicochemical characteristics between treatments, suggesting organic compost is a promising tool for maintaining carrot quality and nutritional content post-harvest.

Michael Raleigh · eCommons (Cornell University) · United States (Buffalo)

The City of Buffalo has made progress in accepting urban farming on vacant land, but remains unwilling to take risks in this area. Policies restrict farmers' access to land, long-term security, food diversity (including animals), and sales. To foster urban farming, the City should amend these policies to grant farmers more freedom and could promote farming through a city-wide composting program and a demolition policy requiring vacant lots to be seeded with clover.

Julian S. Yates, Jutta Gutberlet · Environment and Planning A Economy and Space · Brazil (Diadema)

This paper analyzes food waste flows in Diadema, Brazil, through an urban political ecology lens, focusing on integrated organic waste management for composting and urban food production. While presented as a means for positive socioecological change, the process is characterized by conflict and potential exploitation. Broader structural conditions also constrain the system's ability to offer an alternative to existing waste-management models.

Bruno Martins Dala Paula, Ivana Cristina Lovo, José Delázaro Filho · Urban Agriculture Magazine · Brazil (Belo Horizonte)

This project in Belo Horizonte, Brazil, involved seven households sharing a community garden. Participating families collected household organic waste, with five families collecting 5 kg every 8-10 days. From March 25 to September 25, a total of 420 kg of organic waste was collected and used for collective compost production, which was then distributed to all garden members.

· Wikipedia · United States

This Wikipedia article covers San Francisco's Mandatory Recycling and Composting Ordinance (No. 100-09), passed by the Board of Supervisors in 2009 and described as the first US municipal ordinance to universally require source separation of all organic material. By August 2010 the city reached a 77% waste diversion rate, and composting increased 45% after the ordinance took effect. An earlier 1999 pilot, the 'Fantastic Three' programme, achieved over 90% diversion among participants within seven months. The ordinance polled at 85% support before passing; maximum fines are $100 for single-family homes and $1,000 for large businesses.

Erin Foster West · · United States (Minneapolis)

This study explores the interaction between community gardens and public agencies in Minneapolis and Hennepin County, United States. It identifies that despite a large number of community gardens in the Twin Cities Metro Area, there is no comprehensive city policy for community gardening, making land acquisition difficult as vacant land becomes scarce. The research inventories public policies related to land use, water, and compost specific to community gardens, highlighting the need for public agencies to provide essential services.

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.

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.

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.