Research & reports

José Tobias Marks Machado, Jeferson Tonin, Evandro Pedro Schneider · SHILAP Revista de lepidopterología · Brazil

This study, conducted in two schools in Cerro Largo - RS, Brazil, during 2013, performed a post-implementation analysis of ecologically based school gardens introduced through a university extension program. Positive results included the proliferation of similar projects. However, significant difficulties were emphasized in integrating the school gardens with disciplinary education, attributed to existing conservatism in the educational context.

Miren Rekondo Iparraguirre · TDX (Tesis Doctorals en Xarxa) · Europe

This doctoral thesis explores the development of eco-citizenship competence in school gardens, specifically through collaborative technological design activities. Elementary school students designed and assembled an irrigation system for their school garden over ten activities. Analysis showed students integrated elements from various design proposals without exclusive opposition, and that design conflicts led to a more dynamic and complex garden model. The study also found differences in argumentative discourse structure and dynamics between scientific argumentation and technological design activities.

А А Золотаревский, И И Прокопович · Лесной вестник / Forestry bulletin · Russia (Moscow)

This article explores the potential of composts made from woody-plant waste (WPW) as an alternative to expensive organic additives for urban gardening in Moscow. It suggests that composting WPW can provide a cost-effective solution for preparing fertile soil, which is crucial for plant survival in urban environments. Modern composting technologies allow for the mechanization of WPW composting, producing vegetable earth suitable for planting trees.

Juan Sebastián Muñoz Castiblanco, José Francisco Landinez Cardona · · Colombia (Bogotá)

In the Manantial and Triangulo Alto neighborhoods of Bogotá, serious problems in solid waste management necessitate solutions involving the community and public sanitation companies. This project proposes diagnosing the current state of waste and, based on the findings, implementing an environmental education campaign with an emphasis on urban agriculture and vermiculture. It also aims to improve community collection centers and promote the use of various household materials.

J.S.C. Wiskerke · · Global

This chapter focuses on urban food supplies and the challenges of managing waste flows from urban households and markets in developing countries. Large amounts of municipal solid waste, human excreta, and wastewater are produced, most of which end up in non-engineered landfills or pollute the urban environment. It is noted that these wastes pollute the urban environment, especially in low-income countries with less developed sanitation infrastructure.

· Journal of Biological Chemistry and Environmental Sciences · Egypt (Cairo)

A study conducted over two seasons (2011/2012 and 2012/2013) at Ain Shams University in Cairo investigated the effects of four growing substrates on green onion and Jews mallow production. Green onion growth, yield, lipid, fiber, and total sugar content were highest in peatmoss + vermiculite substrate, while Jews mallow growth, yield, total carbohydrates, protein, ash, energy, sugars, indoles, and vitamin C content were highest in clay substrate. The study recommends peatmoss + vermiculite for green onions and clay substrate for Jews mallow.

Greg Keeffe · Research Portal (Queen's University Belfast) · United Kingdom

This chapter focuses on developing sustainable growing infrastructure at two scales: a large-scale city-wide fuel-productive landscape using algae arrays in Liverpool and a hyper-localized neighborhood food production system in Salford, UK, utilizing a closed-cycle aquaponic system. The author proposes a three-part model for urban agriculture implementation—hardware, software, and interface—concluding that urban agriculture should be viewed as a process rather than a static design, with benefits extending beyond physical outputs like energy and food.

· Urban Ecology · China (Beijing)

This article discusses the pivotal role of soil in urban green spaces (UGS) for maintaining urban ecosystem services, including food production, in the Beijing Metropolitan Region. Urban soils serve as large pools of carbon, nitrogen, and other elements, supporting plant growth and biogeochemical cycles. Quantifying soil properties and understanding soil conditions are essential for assessing UGS ecosystem services and detecting pollution.

Vide Adedayo · Journal of Research in National Development · Nigeria (Lagos)

This study investigated poultry waste management in urban vegetable farms in Metropolitan Lagos from an ecosystem to human health perspective. Using a transdisciplinary approach, community participation, and socio-cultural, physiochemical, microbiological, and clinical information, the research revealed negative impacts and health problems associated with poultry waste management due to poor storage, composting, and packaging techniques. Consequently, adverse effects on users were identified.

임정언, 성종상 · 한국전통조경학회지 · South Korea

This study examined the agricultural philosophy of Seogye Park Sedang and his treatise Saekgyeong (1676) from the Joseon Dynasty, considering its relevance to modern urban agriculture. The research identified four values: socio-economic for small farmers' stability and self-reliance, experiential for agricultural practice as learning, environmental for adapting to nature, and practical for sharing wisdom. These values align with modern urban agriculture's potential contributions to welfare, education, ecological restoration, and knowledge sharing.

Geneviève S. Metson, Elena M. Bennett · PLoS ONE · Canada (Montreal)

This study quantified the role of urban agriculture (UA) in phosphorus (P) cycling in Montreal, Canada, using existing data and surveys of local UA practitioners. In 2012, Montreal imported 3.5 Gg of P in food, with 2.63 Gg accumulating in landfills, 0.36 Gg discharged to local waters, and only 0.09 Gg recycled through composting. UA was found to be only a small sub-system in the city's overall P cycle, contributing just 0.44% of the P consumed as food. Although recycling rates within the UA system are high, the land area dedicated to UA is too small to accommodate all P waste produced on the island.

Angela Y. Y. Kong, Cynthia Rosenzweig, Joshua Arky · HortScience · United States

This study evaluated the effects of organic and inorganic nitrogen (N) inputs on N dynamics within substrate typically used on rooftop farms during an 8-week greenhouse experiment in the United States. Substrate without added N inputs (control) was compared with synthetic fertilizer and three organic N inputs: composted poultry manure, municipal green waste compost, and vermicompost. Few differences in N cycling and yields were found among treatments receiving organic N inputs, despite differences in carbon-to-nitrogen ratios. Crop yields from the synthetic fertilizer and municipal green waste compost treatments were higher than other organic N input treatments. Inorganic N levels in the synthetic fertilizer treatment decreased from 129 mg N/L to 113 mg N/L, while control and organic N input treatments showed nearly 10-fold decreases from 79.5–117.8 mg N/L to 12.8–16.6 mg N/L over 8 weeks. The greatest losses of ammonium and nitrate via leachate were measured from the synthetic fertilizer treatment.

Geneviève S. Metson, Elena M. Bennett · Elementa Science of the Anthropocene · Canada

A study of Montreal, Canada, examining the potential and barriers for phosphorus (P) recycling through organic waste, noting that currently only 6% of P in Montreal's waste is recycled. Combining semi-structured interviews with 19 key stakeholders, participant observation over more than 1.5 years, and document review, the study identified key barriers and facilitators to achieving a high level of organic waste recycling through composting. A provincial law mandating 100% recycling of organic matter was found to have great potential to facilitate increased P recycling, but this potential is inhibited by a lack of shared vision about the roles of government, the private sector, and citizens in producing high-quality compost, along with cultural inertia, lack of knowledge, and lack of infrastructure. Urban agriculture, which benefits from strong citizen support and is both a consumer and producer of compost, could help overcome some of these barriers, but limited access to garden space and training, and diversity in the fertiliser qualities gardeners want, somewhat limit this potential.

Tainã Coelho Quevedo, Anilton Squena de Oliveira, Lauren Machado Gayeski, Marcelo Pereira de Barros · DOAJ (DOAJ: Directory of Open Access Journals) · Brazil

Through Universidade Feevale's participation in Brazil's Projeto Rondon, workshops presented concepts and methodologies for developing community gardens and reusing organic waste and rainwater in two locations in Maranhao state. Three lectures were given and four community gardens, four composters, and two cisterns were built across four municipal schools, training 97 people. Environmental multipliers were trained through active community participation, and alternative cost-reduction techniques were made available for economically disadvantaged regions.

B.M. Mercado-Borrayo, Silke Cram Heydrich, Irma Rosas‐Pérez, Manuel Hernández Quiroz, Claudia Ponce De León Hill · International Journal of Phytoremediation · Mexico

In a natural wetland in the Mexico City Metropolitan Area — a major supplier of crops and flowers whose canals hold high concentrations of organochlorine (OC) and organophosphorus (OP) pesticides — bioaccumulation of these pesticides was studied in water hyacinth (Eichhornia crassipes), a plant considered a plague but suggested in the literature to have phytoremediation potential. In vivo bioaccumulation differences for OC pesticides were largely explained by their log Kow, while all OP pesticides showed bioaccumulation regardless of log Kow, and the higher bioaccumulation factors of some accumulated OC pesticides could not be explained by log Kow alone, suggesting passive transport into the plant. Translocation ratios showed water hyacinth to be an accumulating plant with phytoremediation potential for all the organophosphorus pesticides studied and some organochlorine pesticides, and an equation for free water surface wetlands with floating macrophytes showed pesticide removal by the wetland with room for improvement through better management.

Angela Glore · Journal of Agriculture Food Systems and Community Development · Global

A book review of Sustainable [R]Evolution, edited by Juliana Birnbaum and Louis Fox, a survey of permaculture (and permaculture-like) projects and communities around the world. Multiple contributors provide short profiles of ecovillages, urban agriculture projects, farms, and teaching centers, interspersed with writing on permaculture design principles. The review notes permaculture was coined as a word and design system by Australians Bill Mollison and David Holmgren in the 1970s, describes Mollison's Permaculture: A Designer's Manual as the seminal work on its elements and values, and characterizes permaculture as an inherently personal form of gardening tailored to a property's specific microclimate, topography, and use patterns.

Ricardo da Silva Claudio, Souto de Sousa J uacute nior Francisco, Ismael de Souza Francisco, da Silva Dias Nildo, Nogueira de Sousa Neto Osvaldo, Cruz Portela Jeane, Cl aacute udia Medeiros Souza Ana, Christina Nascimento Porto Vania · African Journal of Agricultural Research · Brazil

A participatory action-research project in a community garden in Bom Jesus, Campo Grande, Rio Grande do Norte, Brazil, tested irrigating organic vegetables (coriander, chive, tomato, rocket) with reject brine from a water desalination/treatment station. All species irrigated with the saline waste water showed yield losses of 25.30% to 26.7% compared with conventional fresh-water irrigation, though some biomass was still produced, and the project changed residents' views on disposing of and reusing the saline waste.

Ricardo Hernández Pérez, Flora Margarita Sosa Rodríguez, Juan Carlos Noa-Carrazana, Norma Flores‐Estévez, Dagoberto Guillén-Sánchez, Cristina Panfet Valdez · Cuadernos de Biodiversidad · Cuba

This study recorded nine Heliconia (Heliconiaceae) species as new accessions from gardens and yards and three botanical gardens (in forested mountain areas of Cienfuegos, Villa Clara, and Sancti Spíritus provinces) in Central Cuba, confirming species identification through molecular corroboration. A propagation strategy using micropropagation and in vitro conservation at the Cienfuegos Biofactory was applied, and the report states that collaboration among universities, the municipal government, and farmers allowed development of new cultivation areas, gardens, and home gardens despite limited resources.

Waritsatul Firdausi, Enny Zulaika · Bioeksperimen Jurnal Penelitian Biologi · Indonesia

Azotobacter spp., a genus of non-symbiotic soil bacteria known for nitrogen fixation, was examined for its potential to degrade lipids and proteins using isolates collected from the Eco Urban Farming site at Institut Teknologi Sepuluh Nopember (ITS), Indonesia. Degradation ability was assessed via a Biodegradation Index (IB) across isolates A1a, A1b, A2, A3, A5, A6, A7, A8, A9 and A10. All isolates degraded lipid except A5, with the highest IB found in isolate A1b (1.00). All isolates degraded protein except A7, with the highest IB found in isolate A8 (3.00).

Secretaría Distrital de Ambiente de Bogotá · Observatorio Ambiental de Bogotá · Colombia

The Bogotá Environmental Observatory reported on 11 September 2015 that the city, via Acuerdo 605 de 2015, established guidelines to institutionalize a sustainable, low-cost Urban and Peri-urban Agroecological Agriculture program. The program includes eight farming systems -- vertical agriculture, biointensive systems, floating roots, raised beds, agricultural recycling, family farming, biological fertilizer production and biocontrol preparation -- coordinated by the District Secretariat of Environment together with the José Celestino Mutis Botanical Garden and the Secretariats of Social Integration, Economic Development, Government and Health.

· Journal of Sustainable Tourism · United States

Analyzes the locations and motivations of WWOOF volunteer-tourism host farms in the US, finding host distributions are spatially skewed toward the west coast and Appalachia.

Nimoh Fred, Ohene-Yankyera Kwasi, Poku Kofi, Konradsen Flemming, Claude-François Robert · Journal of Development and Agricultural Economics · Ghana

A study in Ghana's Shai-Osudoku district investigated farmers' attitudes toward excreta reuse for peri-urban agriculture, surveying 400 randomly selected respondents. A majority of respondents disagreed that excreta are waste and were willing to use them as fertilizer. However, a majority also agreed that excreta can pose health risks, and perceptions on reuse differed among households.

Emmanuelle Vaudour, Christine Aubry, Liliane Bel, Laëtitia Bréchet, Philippe Cambier, Yves Coquet, Karim Dhaouadi, Veronique V. Etievant, Benoît Gabrielle, Jean-Marc J.-M. Gilliot, Jean Christophe Gueudet, Dalila Hadjar, Jonas Hamiache, Sabine Houot, Christophe Labat, Patricia Laville, Raia Silvia Massad, Joël Michelin, Paul Emile Noirot Cosson, Jean-Noël Rampon · HAL (Le Centre pour la Communication Scientifique Directe) · France

The PROSTOCK project aimed to spatially assess the potential of recycling organic waste (exogenous organic matter, EOM) to improve soil organic carbon stocks (SCS) in peri-urban agricultural areas. It also evaluated the impacts of EOM use on greenhouse gas emissions and nitrate leaching. The Versailles Plain and Alluets Plateau (221 km²) were chosen as the study region, with field and lab measurements collected from over 250 point locations. The project advanced the use of imaging data for estimating topsoil organic carbon content (SOC) from soil reflectance spectra, but found that medium spatial resolution multispectral satellite images do not discriminate changes in SOC resulting from EOM applications.

Mary Foran, Nonda Kozas, Daniel Lafranchi · Scholar Commons (Santa Clara University) · United States (California)

The Mission San Jose Well Initiative is a community-based project in Fremont, California, aiming to develop a sustainable irrigation system for a community garden. The system will utilize one of three wells on the Dominican Sisters' Convent property, employing a submersible solar-powered pump to deliver water to a storage tank, which then supplies the garden and other areas via a timer. The project focuses on environmental and water resource design, balancing budget, functionality, and location.

Yu Wang · · China (Xi'an)

This paper constructed indicators for urban agricultural land use efficiency by incorporating urban agricultural ecosystem service indexes and evaluating their values in Xi'an city using the DEA method, analyzing temporal and spatial changes. Results showed that economic efficiency of agricultural land use gradually increased from 2010 to 2012, reaching 1 in 2011 and 2012, with social and eco-efficiency both in good conditions, indicating increasingly significant urban agriculture service functions. However, economic efficiency decreased spatially from urban core to suburban and rural areas, while social efficiency remained generally high, and eco-efficiency diminished from the city to surrounding counties.