Research & reports

James Mbugua · African Journal of Climate Change and Resource Sustainability · Global

Biochar is presented as a promising nature-based solution for urban resilience, applicable in soil remediation, stormwater management, and carbon sequestration within green infrastructure. However, its widespread adoption faces significant barriers, including inconsistent feedstock supply, high production costs, limited public awareness, and a lack of standardized quality and safety regulations. The study also identifies a critical need for policies that integrate biochar into urban planning frameworks and incentivize its production and application.

MAGDALENA DRĂGAN · Journal of Settlements and Spatial Planning · Romania

This paper examines the potential for implementing decentralized bio-waste management in urban Romania, a country with low municipal waste management performance. It analyzed three EU decentralized composting systems to identify best practices and explored local bottom-up initiatives in Romania. The study concludes with policy recommendations for adapting these practices to local conditions and engaging with local initiatives to develop context-specific composting solutions.

Francisco Dela Cruz, Corazon Magno, Reynaldo Soriano · International Journal of Horticulture and Food Science · Global

This research modeled phenolic compound distribution in eight flaxseed genotypes cultivated in the Sobat River Floodplain during the 2023 season. Total phenolic content ranged from 8.4 to 16.7 mg gallic acid equivalents per g dry weight, with the seed coat contributing 64.2% of free phenolics. Urban gardening trials showed composting-amended substrates increased total phenolics by 13.8%. A predictive model explained 72.3% of total phenolic variance, and supply chain simulations indicated 8.6% phenolic losses over 60 days.

Luiz Fernando de Sousa Antunes, André Felipe de Sousa Vaz, Giulia da Costa Rodrigues dos Santos, Talita dos Santos Ferreira, Renata Rodrigues dos Santos, Renata Alves, Jaqueline Carvalho de Almeida, M. A. de A. Leal, Maria Elizabeth Fernandes Correia · ACS Omega · Global

This study investigated millicompost as a sustainable peat-alternative substrate for bell pepper seedling production, combining it with regional agro-wastes like coconut coir, gliricidia shavings, and elephant grass. Seven novel growing media formulations were tested. Substrates S4 (33% millicompost + 33% gliricidia + 33% coconut fiber) and S8 (50% millicompost + 50% gliricidia) produced seedlings of similar quality to pure millicompost and commercial substrate.

Roy Hanney · Zenodo (CERN European Organization for Nuclear Research) · United Kingdom

This project report documents the development, presentation, and evaluation of "Rituals for Earthly Survival," a Butoh-inspired immersive audiovisual performance presented in Portsmouth, UK, in November 2024. It details the creative process, artistic approach, audience experience, and methodologies, including composting and collective creation, used to explore environmental crisis and renewal. The report serves as supporting documentation for ongoing creative practice research.

Aminu Zakariyau, Murtala Rabiu · International Journal of Advances in Engineering and Management · Nigeria (Katsina City)

The potential ecotoxicological impacts of municipal solid waste compost (MSWC) on soil, plants, and humans in urban Katsina, Nigeria, were assessed. Analysis of soil mixtures and plant biomass (maize and beans) revealed high phytotoxicity in beans, while maize considered MSWC as phytonutrients. No statistical difference in non-biodegradable substance concentrations in soils and plants was found, and ecological risk index (ERI) indicated low risk; however, Target Hazard Quotients (THQ) suggested a likelihood of non-carcinogenic effects to the ecosystem.

Andrea liliana Moreno rios, Daniela Paola Lugo Sierra · Latin American Developments in Energy Engineering · Colombia (Barranquilla)

This study proposes the use of Technosols, artificial soils developed from domestic solid waste, to promote urban agriculture in Barranquilla, Colombia. Technosols improve soil quality by reusing organic and inorganic materials, fostering revegetation and biodiversity in urban areas. The development process ensures the final product has no toxic effects and a suitable structure for plant growth, offering a sustainable solution for waste management and urban environmental improvement.

Medina Veliu, Hugo López-Romano, Giuseppe Picca, Marco Panettieri, Eduardo Moreno‐Jiménez, Denis Courtier‐Murias, Liliane Jean‐Soro, Johnny Gaspéri, Laura L. de Sosa · Ecotoxicology and Environmental Safety · Spain (Madrid)

This study investigated the impact of biochar-amended composts on trace element and nutrient dynamics in rooftop farming systems by cultivating tomatoes, lettuce, and Swiss chard for three years on a Madrid rooftop. Six substrates derived from spent coffee grounds, coffee silverskin, and seaweeds, with and without biochar, were used. Results showed that biochar reduced plant uptake and leaching of trace elements, lowering arsenic uptake by up to 40% in seaweed-based composts. Biochar also improved nutrient retention, reducing phosphorus and nitrogen losses by 40% and 25% respectively.

Andi Nurmas, ROBIATUL ADAWIYAH, Makmur Jaya Arma, Norma Arif, Sarawa Sarawa, Dirvamena Boer · Jurnal Tarreang Tren Pengabdian Masyarakat Agrokompleks · Indonesia (Kendari City)

This Community Service Program was conducted for the Flamboyan Dasawisma Group in Padaleu Village, Kambu District, Kendari City, Indonesia. The program was implemented through educational outreach on the benefits and application of urban farming, followed by hands-on mentoring in establishing an urban farming garden. Participants showed a positive response to the program and demonstrated high enthusiasm for cultivating vegetables using the urban farming system.

Noémie Régeard · L’Espace Politique · Congo

This article explores the circularity of organic matter streams in Nkayi, an intermediate city in Congo, through interviews and observations. The qualitative inquiry reveals the coexistence of institutional household waste streams, supported by a development project, and informal organic matter streams, identified through intra- and peri-urban agricultural practices. These streams are subject to various socio-territorial, political, and economic tensions.

Novi Mailidarni Novi, Othman Sulaiman, Juliawati, Ahmad Jauhari, Tasliati Djafar, Syarifuddin Syarifuddin · WISDOM Jurnal Pengabdian Kepada Masyarakat Wisdom · Global

This community service program addresses limited yard space and chemical dependency in urban households by empowering residents, particularly women and youth, to practice sustainable urban farming and convert organic waste into ecoenzyme. The program provides education and training on ecoenzyme production and its use as fertilizer, pesticide, and cleaning solution, aiming to reduce chemical usage, minimize waste, and foster environmental awareness.

Tinawaen Tambol, Emmanuel Kanchebe Derbile, Moussa Soulé · Scientific Reports · Niger

This study investigated peri-urban farming systems in West African Sahel cities. A mixed-method research design, including field and household surveys of 142 peri-urban smallholder farmers, was employed. Results showed that biopesticides/crop and pest management were the most used Climate-Smart Agriculture Technologies (CSAT) in dry-season farming (p = .002). Other technologies included fertilizer micro-dose, organic manure and compost application, flood-tolerant improved varieties, and green energy-based irrigation.

Md. Habibullah Siddiki, Jakaria Chowdhury Onik, Mamunur Rashid, Md. Abubakar Siddik · Journal of Agroforestry and Environment · Global

This study examined the effects of different organic amendments on BRRI Hybrid Summer Tomato 4 grown in sandy soil on a rooftop. Treatments included sand with compost, coco peat, household ash, or rice husk. Compost (T1) was superior for plant height, fruit number, and yield, while household ash (T3) resulted in the highest plant tissue phosphorus and potassium. The findings suggest that organic materials like ash and compost can increase tomato yields in rooftop gardens and mitigate sandy soil limitations.

Ana Catarina Morais, Akira Ishida · Frontiers in Sustainable Food Systems · Japan

This research investigated factors encouraging Japanese households to engage in composting, applying the theory of consumption values (TCV) and evaluating hypotheses using ordinal partial least squares structural equation modeling. Findings indicate that household composting in Japan is influenced by social approval, behavior visibility, composting knowledge, convenience, interest in gardening/farming, and individual availability. Factors like emotions, gender, housing type, and household size did not significantly impact composting practice.

Fatmawati Fatmawati, Muhlis, Muhtar Muhtar, Andi Munawar, Sappewali, Nurfaidah Samad, Maifa Diapati · Jurnal Dinamika Pengabdian (JDP) · Indonesia

This study addressed the challenge of continuous organic fertilizer supply for the 30-member Seruni Women's Farming Group (KWT) in Indonesia, which practices urban farming. It implemented domestic organic waste processing using BSF larvae (maggot) bioconversion technology to produce compost. The activity, conducted through lectures, discussions, and practical training, found strong local government support and high enthusiasm from KWT members and the community, successfully improving their understanding of waste processing for compost production.

Diksha Pathania, Indu Kumari, Neha Salaria, Suresh Kumar, Rajesh Kumar · Waste Management · Global

This chapter provides an overview of vermicomposting, a sustainable and eco-friendly waste management practice that uses earthworms to convert organic waste into nutrient-rich compost. Vermicomposting has been gaining popularity as a way to reduce the environmental impact of waste disposal and promote sustainable agriculture. This method is suitable for various applications, including urban agriculture, landscaping, and horticulture, and can offer both environmental and economic benefits.

Gusti Agung Ayu Made Listya Mahadewi, Ida Bagus Gde Agung Yoga Pramana · PKM-P · Indonesia (Ubung Village)

A community service program implemented in Ubung Village, Indonesia, aimed to enhance agricultural productivity and sustainability through the effective use of organic fertilizers. The Jelita Women Farmers Group and the broader community received one week of hands-on training in organic fertilizer management and sustainable farming practices. After a 30-day evaluation, significant improvements were observed in soil fertility, crop yields, and community participation, with harvest results for crops like vegetables, chilies, and melons markedly better than pre-training levels.

Sofía Aguado, Helena Cotler, Marta Astier, Alejandro Padilla‐Rivera · Circular Economy and Sustainability · Latin America

This literature review examined methodologies applicable to municipal composting systems linked to urban agricultural production, with a specific focus on the Latin American context. It revealed a lack of structured methodologies to assess the circularity of municipal organic waste management systems and their connection with urban agriculture, particularly in heterogeneous contexts like Latin American cities, despite numerous existing evaluation methods. Life Cycle Assessment (LCA) is commonly used but often prioritizes environmental impacts, neglecting social, economic, and circularity dimensions.

Taslima Arzu, Md. Ariful Kabir Sujan, S.M. Symon Bappy, Rupam Mitra, Suparna Das Toma, Vulon Prosad · Plant Science Archives · Bangladesh

This study surveyed 62 household and rooftop garden owners in Pabna City, Bangladesh, to examine the benefits of rooftop gardening. Findings indicate that rooftop gardens reduced household waste by an average of 887.1g and met 41% of fertilizer demand by using biodegradable waste. Participants reported improved psychological well-being (83.9%) and increased vigor (77.4%), with anxiety and depression reduced or neutral. Rooftop gardening generated an average yearly income of 14,750 BDT, with a net income of 1293.5 BDT, and provided 387.5 kg of fruits and vegetables for household consumption, proving to be a profitable activity.

· Corporate Philanthropy Report · United States (Delaware and Maryland)

Delmarva Power and the Delaware Nature Society awarded $40,000 in grants in 2024 through their Sustainable Community Grants program in Delaware and Maryland. These grants support projects in reforestation, sustainable transportation, affordable housing, and composting. Over the past four years, the program has provided more than $235,000 in total funding.

Zi Jian Oh, Ainul Hayat Abdul Razak · International Journal of Academic Research in Business and Social Sciences · Malaysia

An exploratory study in five Malaysian vocational colleges investigated the Sustainability Tracker 360, a digital dashboard for monitoring food waste management and urban farming. Composting systems converted 43.35 kg of food waste into 12.95 kg of organic fertilizer (29.9% conversion rate), supporting 150 potted plants. Digital monitoring strengthened accountability, fostered long-term engagement, and deepened sustainability awareness among participants.

Miguel de Celis, Laura L. de Sosa, Giuseppe Picca, Noelia González‐Polo, Cristina Gómez Ruano, Luciano Beneduce, Claudio Zaccone, Marco Panettieri · Environmental Microbiome · Global

The influence of different organic substrates on tomato growth and its associated microbial community was studied in an open-air rooftop farming setup. Combinations of peat with compost derived from seaweed biomass or coffee byproducts (50% of volume), and how biochar-blending altered these compositions, were evaluated. Substrate properties were mainly defined by the compost feedstocks, and biochar blending had a minor influence on substrate composition, though it enhanced tomato yield. Compost feedstock had a greater impact on microbial communities, and the abundance of bacteria and fungi associated with composted seaweed biomass was positively associated with tomato yield.

Yanick Borel Kamga Valerie Njitat Tsama* · Journal of Biodiversity and Environmental Sciences (JBES) · Cameroon (Nkongsamba)

This study assessed the impact of untreated waste from the municipal slaughterhouse in Nkongsamba, Cameroon, on vegetation by conducting floristic inventories at upstream, near, and downstream sites. Twenty-five 100 m2 plots were established at each site, revealing a total of 105 species from 79 genera and 41 families. The downstream site exhibited the highest species richness with 81 species, 70 genera, and 35 families, but these results showed a dominance of ruderal taxa and pollution bio-indicators like Commelina benghalensis and Tithonia diversifolia, reflecting ecological disturbance of the plant environment.

Wang, Junrong · Digital Commons - RISD (Rhode Island School of Design) · Global

This project uses landscape architecture to reduce carbon emissions from restaurants by implementing compost gardens that shorten compost transportation routes. These gardens, placed on roofs and at ground-level, create new local food sources to replace distant shipments and provide materials for organic pesticides, reducing carbon-intensive VOC emissions. The compost gardens are integrated into existing parking lots and vacant lots, forming a community garden network.

Rafael López Núñez, Paula Madejón, José Molina-Vega, Sabina Rossini-Oliva · Horticulturae · Global

This study investigated soil variability in two sections of an urban allotment garden subjected to long-term manure fertilization for 12 or 16 years, with application rates up to 10–12 kg m−2 yr−1. Prolonged manure incorporation enhanced soil fertility, increasing organic carbon, total-N, available-K, and total/available-P, and caused shifts in mineral composition with increases in Ca, inorganic C, Sr, and S. No accumulation of potentially toxic elements was observed, but pronounced spatial heterogeneity emerged among plots, with coefficients of variation up to 58% for S and 47% for Zn.