Research & reports

Jerome Wei Chiang Teng, Chew Beng Soh, Shiddalingeshwar Channabasappa Devihosur, Ryan Hong Soon Tay, Steve Kardinal Jusuf · Sustainability · Global

This study investigated the effects of agrivoltaic systems on rooftop microclimates and PV efficiency. ENVI-met simulations showed that PV temperatures in plots with crops below the PV system were 2.83 °C lower on sunny days and 0.71 °C lower on cloudy days, leading to a 1.13–1.42% and 0.28–0.35% improvement in PV efficiency, respectively. Data from a physical prototype indicated that evaporative cooling reduced ambient temperatures, with the agrivoltaic system generating 3.05–3.2% more energy daily compared to a control without crops.

Brandon Edwards-Schuth, Marco Cerqueira · Northwest Journal of Teacher Education · Global

This paper suggests that an anti-fascist guerrilla gardening (Plantifa) curriculum provides educational opportunities for community activism. It utilizes anti-fascist, decolonizing, and eco-justice frameworks to connect learners with their communities, local ecosystems, history, and permaculture. The curriculum involves mapping local terrain, identifying plants, and considering food-bearing plants for community needs.

Zeba F. Alam, Karen Avena, Lorenzo Sales, Denise Suemith, Riane UY · Indian Journal of Fisheries · Global

This study attempted to optimize aquaponics culture conditions for water spinach and freshwater prawns, comparing their growth performance in soil, aquaponics, aquarium, and hydroponics units. Water spinach showed significant growth in the aquaponics setup compared to hydroponics, but less than in soil units. Freshwater prawns also recorded significantly higher growth in the aquaponics unit compared to the aquarium unit.

José Luis Villalpando, Daniel Francisco Chi-Maas, Itzel López‐Rosas, Víctor Ángel Aquino-Luna, Jesús Arreola-Enríquez, Julia Cristel Alcudia-Pérez, Gilberto Matos-Pech, Roberto Carlos Gómez-García, Jesús Froylán Martínez-Puc, William Cetzal‐Ix · Agriculture · Global

This study evaluated a backyard system using 50cm × 50cm pinewood boxes for maize and peanut over nine months. Approximately 213 kg of organic residues were converted into 300 kg of mature compost, and plant development was compared between compost and control conditions. Correlation analyses of morphological properties showed that nutrient effects were positively associated with crop morphology, with maize yields of 9 kg/m2 in compost conditions and 6.6 kg/m2 in control, and peanut yields of 184 g/m2 in compost and 73 g/m2 in control.

Kyle Richardville, Dan Egel, Andrew Flachs, Amit K. Jaiswal, D.J. Perkins, A. W. Thompson, Lori Hoagland · Urban Agriculture & Regional Food Systems · Global

A two-year field trial tested whether amending degraded urban soils with locally made leaf-mold compost could improve soil chemical and biological properties and support the survival of a plant-growth-promoting, disease-suppressive microbial inoculant (Trichoderma harzianum T-22) in tomato (Solanum lycopersicum) production. Compost-amended plots showed markedly higher active soil organic matter and marketable fruit yield in both years, lower foliar disease severity in year two, and reduced transplant-stress deaths from T-22 inoculation in one cultivar, but the authors caution that all composts must be tested for heavy metals or pathogens and that overapplication can reduce crop health.

· Computational Science and Its Applications – ICCSA 2021 (LNCS) · Global

Presents the design of a low-cost smart indoor greenhouse to cultivate herbs and vegetables with minimum human intervention, monitored by a web application. It builds on IoT-based monitoring systems for indoor micro-climate horticulture.

· Sensors · Global

Optimizes bokashi composting of household organic waste in a smart composting bin, fermenting banana peels with EM-1 brans over 14 days while sensors log temperature, humidity and moisture.

· IEEE Photonics Journal · Global

Design and implementation of an LED automatic lighting system for plant factories that provides automatic dimming and multi-band colour mixing, adjusting light intensity and colour to plant needs to increase crop yield.

· Earth · Australia

Assesses the reliability of using recycled water in wicking beds, described as a simple system that can provide high yield and water use efficiency, for sustainable urban agriculture.

· Frontiers in Sustainable Cities · Bangladesh (Dhaka)

Evaluates the growth, yield and economic viability of lettuce grown vertically on a building wall in Dhaka, finding a green-leaf cultivar in an organic medium significantly outperformed other treatments.

· Applied Sciences · Global

Proposes a prototype room for low-income users enabling self-construction and upcycling of widely available waste materials, including a green roof of waste materials, with mechanical tests on filled PET bottles and PET-bottle/concrete blocks.

· Inventions · Global

Presents a design advancing the technological readiness of a low-cost vertical hydroponic system using lighter, cheaper materials such as aluminum and PVC with integrated drip irrigation for resource-limited settings.

Sumita Ghosh · · Global

This research conducted a desktop review and analyzed six international case studies of rooftop urban farms, community gardens, and home gardens. The analysis found that productive landscapes already exist on city rooftops, contributing positively to community, environment, ecology, economy, and society. Planning and designing rooftop gardens in dense urban areas could foster place-making through urban agriculture.

Diana Maria Reyes Avalo, Misterbino Borgès Garcìa · DOAJ (DOAJ: Directory of Open Access Journals) · Cuba (Jiguaní)

This study in Jiguaní municipality, Granma province, Cuba, aimed to enhance the sustainable production and diversification of yam cultivation under agricultural drought conditions using biotechnological seeds. The accelerated yam seed production technology, combining biotechnological and conventional methods, was implemented in urban, suburban, and family agriculture. This led to the successful implementation of certified yam seed technology, increasing plant numbers from 2000 to 6000 in 2018 for a total area of 0.6 ha, and contributing to local development.

Hayley Q McGough · DigitalCommons - CalPoly (California State Polytechnic University) · Global

This paper investigates why plant façades on buildings frequently die, preventing them from fully realizing benefits like urban heat island reduction and improved air quality. Through interviews with landscape architects, it examines factors for maintaining plant façades and assesses if new approaches, such as earlier integration of landscape architects or biocurtains, can address the high mortality rates. The study highlights that these plant façades often fail, leading to waste and unfulfilled potential.

Byoung-Kwon Lee, Hyung Kwon Yun, In-Kyoung Hong, Young-Bin Jung, Sang Mi Lee · Journal of people, plants, and environment · Global

This study investigated the effect of companion planting using marigold, zinnia, spearmint, and basil on the growth and quality of cherry tomatoes. Plant growth in companion planting plots significantly increased compared to monoculture, but there was no interaction effect among companion plants, planting ratio, and type. While sugar content and vitamin C content were higher than the control, no statistically significant difference was found.

Ayako Nagase, Jeremy Lundholm · Journal of Living Architecture · Global

This review elucidates potential ecosystem services provided by container gardening, which are used in cities globally where access to soil is limited. The services include food production, stormwater management, air quality improvement, energy savings, thermal comfort, plant biodiversity, creation of animal habitats, aesthetic value, communication, and environmental education. The review aims to recognize the value of container gardens to promote them as part of green infrastructure in urban areas.

Laura Vanesa Martínez Gordillo · South Florida Journal of Development · Colombia (Bogotá)

This document reflects on a social and ecological project in Barrio La Concordia, Bogotá, Colombia, which uses vertical urban agriculture and graffiti on facades. The project, "Germinating Networks," encourages residents to adopt sustainable practices and reconnect with nature using reusable materials for hanging pots. It aims to foster cooperative relationships and cultural changes around organic food, influencing neighborhood identity.

Caroline Goodson · Cambridge University Press eBooks · Global

This chapter examines the economic context of urban food production in the Middle Ages, focusing on household-scale cultivation. It explores the emergence of urban food markets and the absence of evidence for them before the eleventh century. In the absence of commercial farming, household-level cultivation was the primary food source for most city-dwellers, with food gardens and their exchange through family networks highlighting the role of family links in urban food production.

Livia Windiana, Desiana Nuriza Putri, Dina Amalia, Annisa' Melliana Rahmah · VIABEL Jurnal Ilmiah Ilmu-Ilmu Pertanian · Global

This community service study aimed to analyze household vegetable consumption frequency and income (savings) from aquaponics application. Using a qualitative approach, survey methods, and income analysis, the study found a 9.5% increase in household vegetable consumption frequency among respondents, reaching 100% daily consumption after the activity. Additionally, household food income or savings from aquaponics application amounted to Rp. 126,000/month from harvested vegetables and catfish.

Luciano Majolo, Deibson Teixeira da Costa, Camila Firmino de Azevêdo · Editora Científica Digital eBooks · Global

This study analyzed the application of fresh coffee grounds as a substrate for arugula seed germination, using concentrations of 0% to 25%. All evaluated characteristics, including emergence percentage, seedling length, and mass, showed a decreasing variation with increasing coffee grounds. Fresh coffee grounds applied directly as fertilizer proved inefficient for arugula in the tested quantities.

A. Varela, Alexandra Sandoval-Albán, Marcela Muñoz, Alfonso Goméz Gómez, Manuel Bogoya, Germán Combariza · Urban forestry & urban greening · Global

This study evaluated the optimal combination of three different modular extensive green roof structures and two types of local substrates (compost and soil + biochar) for Lactuca sativa L. var. crispa (lettuce) growth under tropical climate conditions, measuring physicochemical and biological properties of substrates and plant growth variables over seven weeks under rainy and dry conditions. A monolithic multilayer structure, high Mg concentrations, elevated amounts of 600 μm aggregates, and lower substrate bulk density were linked with higher L. sativa yield, but the specific substrate used was not associated with this result. Some physicochemical and microbiological properties of substrates changed by the experiment's end, with these changes dependent on climatic conditions.

Grace Mwajuma, Juma Kisimba, Neema Mwamakula · Zenodo (CERN European Organization for Nuclear Research) · Tanzania

This intervention study assessed subsurface clay pot irrigation versus traditional hand-watering basins in 12 primary school vegetable gardens in Tanzania's Dodoma Region. Clay pot irrigation significantly increased mean water use efficiency by 65% and marketable amaranth yield by 42%. Tomato yield showed a positive but non-significant trend, and qualitative feedback indicated reduced labor burden for students.

Majid Amani-Beni, Gaodi Xie, Qingjuan Yang, Alessio Russo, Mohammad Reza Khalilnezhad · Land · Iran

This qualitative field study investigated whether the spatial and structural layout of six historic Persian gardens in four Iranian provinces is suitable for modern urban food gardening. The research suggested that combining elements of formal landscape design, non-edible decorative plants, and traditional artwork would increase the Persian gardens' attractiveness. It was found that separating productive units containing edible plants from public units using a central meeting spot populated by aesthetic plants and items may attract ordinary visitors interested in gardening without disturbing anyone's activities. The Persian gardens' multifunctionality, aesthetic value, and health-promoting qualities constitute a considerable historic achievement in garden design, making them a suitable model for edible urban gardening.

· Current Science International · Egypt (Giza)

An experiment conducted in a rooftop garden in Giza, Egypt, during the summer seasons of 2019 and 2020 investigated the effect of nine different substrate mixtures on eggplant growth and yield. Sand:rice husks (1:1) v/v (SR1) resulted in the highest plant growth and yield, followed by sand:rice husks (2:1) v/v (SR2). When considering cost-effectiveness, SR2 was the cheapest growing medium, followed by SR1, with initial costs of 10.75 E.P and 13.5 E.P respectively, and average yields of 10.96 kg/m² and 12.68 kg/m².