Research & reports

Rolando León Aguilar, Ramón Liriano González, Dania Bárbara Núñez Sosa · Centro agrícola · Cuba

A study at the intensive garden of the Universidad de Matanzas in Cuba evaluated the effect of organic matter and vegetative ground cover on water resource sustainability for urban agriculture, growing lettuce and cucumber. Using a randomized block design with six treatments and five replicates, soil moisture content and yield components were measured and analyzed with Tukey's test at 95% confidence; organic matter and vegetative cover increased soil water content and retention by more than 10% compared with bare soil, and both applied singly or combined produced a positive response in the yield components of lettuce and cucumber.

P. W. Mashela, K. M. Pofu, B. Nzanza · Acta Agriculturae Scandinavica Section B - Soil & Plant Science · Global

To test whether cabbage (Brassica oleracea) leaves -- widely available as market waste in peri-urban agriculture -- could be used in a ground leaching technology (GLT) system to manage root-knot nematodes (Meloidogyne spp.) and improve tomato (Solanum lycopersicum) growth, researchers ran a 2x2x2 factorial experiment combining Bacillus species, Brassica leaf extract, and nematode presence across two seasons under microplot conditions. At harvest, the Bacillus x Brassica x nematode interaction reduced final nematode population density, fresh fruit yield, dry shoot mass, plant height, and stem diameter, while the Bacillus x Brassica interaction increased tomato growth variables; Brassica alone reduced tomato productivity, and overall the extract's efficacy depended on microbial activity, leading the authors to conclude the material was not suitable for use in GLT systems.

Muhammad Ali Memon · Apple Academic Press eBooks · Global

A book chapter (2012, no specific region) on Integrated Solid Waste Management (ISWM) based on the 3R approach (reduce, reuse, recycle) discusses optimizing waste management across all waste-generating sectors — municipal, construction and demolition, industrial, urban agriculture, and healthcare facilities — and all stakeholders, including generators, service providers, regulators, government, and communities. It traces solid waste management (SWM) from an original focus on reducing public health risk, to a later environmental focus, to a more recent emphasis on resource conservation and recovery under the 3R approach, and describes the ISWM concept — streamlining source separation, collection and transport, transfer/material recovery, treatment/resource recovery, and final disposal — as expanding under UN Environment Programme promotion from its original municipal solid waste management (MSWM) scope to cover all waste-generating sectors.

Koont S. · University Press of Florida (Contemporary Cuba series) · Cuba

This book provides a comprehensive account of Cuba's world-leading sustainable urban agriculture program, documenting a thousand-fold increase in urban agricultural output since 1994 and analyzing how government organizational infrastructure and human capital investment enabled this transformation.

Simon Mariwah, Jan-Olof Drangert · Waste Management & Research The Journal for a Sustainable Circular Economy · Ghana

A study in a peri-urban agricultural community in Ghana explored attitudes towards sanitized human excreta as fertilizer, collecting data from 154 households. It found a general negative attitude towards fresh excreta and its handling. While residents accepted excreta could be used as fertilizer, they were unwilling to use it on their own crops or consume such fertilized crops.

Zikrullah Safi, Martina Předotová, Eva Schlecht, Andreas Buerkert · Journal of Plant Nutrition and Soil Science · Afghanistan (Kabul)

A two-year study in Kabul, Afghanistan, measured horizontal flows of C, N, P, and K, and leaching losses of N and P in 21 vegetable gardens, 18 cereal fields, and vineyards. The findings suggest that soils in extensive cereal fields are at risk of N and K depletion, vegetable gardens face K depletion, and vineyards may be oversupplied with nutrients, potentially contributing to groundwater contamination. These results merit verification.

Eckhard Hein, TW Kabore, A. Bilgo, SN Sall, Dominique Massé · International Journal of Biological and Chemical Sciences · Burkina Faso (Ouagadougou)

This study evaluated the impact of untreated municipal solid waste (MSW) on soil properties in peri-urban agricultural fields near Ouagadougou, Burkina Faso. Soils receiving MSW for 7 to 20 years showed up to a two-fold increase in carbon, nitrogen, and phosphorus content, with older fields having higher increases. While microbial biomass was significantly higher in MSW-fertilized soils, microbial activity and catabolic diversity were not significantly different.

L Ndiaye M, Y Dieng, S. Niang, Rak H, Mauro Tonolla, Raffaele Peduzzi · African Journal of Microbiology Research · Senegal (Dakar)

A survey in Dakar, Senegal, assessed the effect of irrigation water quality on Salmonella spp. incidence in lettuce. Microbiological analysis revealed that 35% of irrigation water was contaminated by Salmonella spp., with no significant difference between groundwater and wastewater. Lettuce from Dalifort and Grand-Yoff markets showed significantly higher contamination rates than those from Sham and Zinc markets. The study concluded that irrigation water and manure are potential sources of contamination, and lettuce may serve as a vector for pathogen transmission to consumers.

Marie-Christine Zélem, Zelem, Marie-Christine · AgEcon Search (University of Minnesota, USA) · Senegal (Dakar)

This study identifies numerous constraints hindering the widespread adoption of organic waste utilization in agriculture in the peri-urban area of Dakar, Senegal. These constraints include the nature, availability, and accessibility of organic waste, poorly controlled urbanization, effects of seasonal variation, resistance to changes, and medical risks. The project, which combines agriculture with city waste management, faces these challenges.

Sinan Koont · University Press of Florida eBooks · Cuba

This chapter examines technological innovations in protected and semi-protected urban agriculture cultivation in Cuba. Greenhouse cultivation was initially introduced for import substitution in tourism, with adaptations for tropical conditions and agroecological pest control. Semi-protected cultivation, using shade-providing screens, later replaced protected cultivation as a subprogram, and polycultures have been effectively reintroduced in semi-protected organóponicas. The program is rapidly expanding with government support.

Lorenzo Montero, Reynaldo Cun, J. Pérez Pérez, Marta P Ricardo, Julián Herrera · DOAJ (DOAJ: Directory of Open Access Journals) · Cuba (La Habana)

The effect of wastewater irrigation on sorghum and maize yields for animal feed production in urban agriculture was studied at an urban farm in San Miguel del Padrón municipality, La Habana province, Cuba. Two treatments, wastewater irrigation (T1) and no irrigation (T2), were compared, with a total net dose of 1775.4 m3·ha-1 of wastewater applied over 31 irrigations. Wastewater irrigation significantly increased grain yields for sorghum (4.29 t·ha-1) and maize (1.73 t·ha-1) compared to the no-irrigation treatment. Sorghum showed better water utilization efficiency than maize.

Yan Lv, Rui Zhang · Advanced materials research · Global

Farming in the city is the most significant practice of urban agriculture, with important social and economic impact. It constructs a stable and sustainable eco-recycling system, utilizing daily waste for crop irrigation, livestock breeding, and energy production. This study discusses the ecological characteristics, scientific principles, and operation steps of these ecological technologies to efficiently present an artificial agro-ecosystem in limited space.

Steffen Lehmann · Sustainability · Global

This paper reports on best practices in urban design principles for material flow, recovery, and adaptive reuse to implement zero waste. It notes that urban farming is a valid strategy for local food production and composting organic waste. A key finding is that embedding zero-waste requires strong industry leadership, new policies, effective education curricula, and increased awareness.

Ralf Otterpohl, Christopher Buzie · Waste · Global

This chapter provides an overview of biowaste management solutions, focusing on reuse. It describes high-tech systems, urine diverting flush systems, and modern dry sanitation systems like terra preta sanitation (TPS), which can produce black soil and reusable water. TPS is presented as a promising approach for managing urban household waste, addressing soil degradation and food insecurity, and potentially improving urban agriculture when combined with greywater reuse; however, questions regarding macronutrients and micronutrients remain.

Arrate Corres Velasco · Soberanía alimentaria, biodiversidad y culturas · Argentina

The Urban Agriculture Program of Rosario, Argentina, has succeeded in changing part of the city's landscape by integrating a social-economy project into its neighbourhoods. Formerly unused vacant lots are now community gardens managed agroecologically. Mariana Ponce and Raul Terrile, members of the technical team coordinating the initiative, describe what the program involves.

Nikita S. Eriksen‐Hamel, George Danso · International Journal of Agricultural Sustainability · Global

Urban and peri-urban agriculture (UA) significantly contributes to the total food requirements of cities, especially in southern cities of the developing world. This review describes agronomic issues unique to UA and identifies possible interventions to address them. Growth-limiting and growth-reducing factors in UA include water availability, nutrient supply, soil degradation, pests, and soil pollution. Addressing these constraints requires action at both field and municipal or regional levels.

I. Bame, J. C. Hughes, Louis Titshall, C.A. Buckley, R. J. Gilkes, N. Prakongkep · · Global

This soil column study investigated the effects of anaerobic baffled reactor (ABR) effluent on chemical properties of three contrasting soils, relevant to peri-urban agriculture. Soil columns were leached with ABR effluent or distilled water using 16 pore volumes, then sectioned and analyzed for inorganic-N, P, and K. For all soils, nutrient content, particularly phosphorus, in the 0-2 cm layer was significantly higher than in the middle and bottom sections of the columns. Significant differences in phosphorus accumulation were observed between effluent-leached and water-leached soils.

Mary Lydecker, Pay Drechsel · International Journal of Agricultural Sustainability · Ghana (Accra)

This study examines the contributions of urban agriculture to municipal sanitation and health services in Accra, Ghana. It estimates that Accra generates 80,000,000L of wastewater daily, with urban vegetable farms using up to 11,250,000L. By mitigating health risks from wastewater irrigation, urban farms can significantly contribute to the city's sanitation needs and support buffer zone management, reducing solid waste dumping and improving flood control.

Mamadou Ndiaye, H.‐R. Pfeifer, S. Niang, Y Dieng, Mauro Tonolla, Raffaele Peduzzi · VertigO · Senegal (Dakar)

In Dakar's urban agriculture, untreated wastewater is used for irrigation due to shallow groundwater salinization. A study conducted at Pikine and Patte d'Oie sites evaluated the chemical and microbiological quality of irrigation water. Findings showed that total nitrogen in irrigation water exceeded WHO guideline values, Salmonella spp. was isolated from 35% of irrigation water, and a wastewater sample tested positive for Vibrio cholerae. This research indicates that irrigation with polluted water and the use of organic fertilizers can degrade groundwater quality and pose health risks.

서향숙 · 의철학연구 · Global

This paper discusses the environmental and health issues arising from modern food culture, focusing on industrial and pastoral food chains as explored by Michael Pollan. It examines environmental pollution and GMO food issues within industrial food chains, and problems with semi-organic corporate food systems in pastoral chains. The study proposes urban agriculture, including school gardens, as a solution for a healthy food chain for future generations, integrating the concept of "food justice."

Emmanuel Berthier, Bernard de Gouvello, Florian Archambault, Didier Gallis · · Global

This preliminary study aimed to better understand the water balance of vegetated or green roofs (TTV) and to develop a conceptual reservoir storage model. Two databases were used: CSTB's one-year data (limited to rain and runoff) and LROP's nine-day detailed data (including evapotranspiration and water storage). Detailed monitoring was shown to deepen the understanding of water balance, and the developed reservoir storage model appeared suitable for reproducing the TTV water balance.

Yuji Hara, Takashi Furutani, Akinobu Murakami, Armando M. Palijon, Makoto Yokohari · Waste Management & Research The Journal for a Sustainable Circular Economy · Philippines (Metro Manila)

This research used solid waste management programs in three Quezon City barangays, Metro Manila, as a case study to assess organic waste recycling and local urban agriculture potential. It measured organic waste and compost production from barangay projects and identified potential compost use on local farmlands and vacant lots. The study found that securing compost buyers is currently difficult, leading to distribution to neighboring farm villages, but concluded that a more local compost recycling system within the barangays is feasible.

O. Muñiz, M. Ternero, Álvarez Montero, F. Martínez, T. Limeres, O. Jouber, M. Orphee, Julia Vidan Estevez, B. Calero, F. A. de Alcantara, Adriana María de Aguiar Accioly · Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) · Global

This paper situates its topic within the urban agriculture movement, which it describes as having successfully enabled low-input food production in cities, noting that organoponicos — plots focused on producing leafy vegetables and condiment crops in organic substrates — have driven up demand for organic material sources. The title indicates the study addresses the effect of using heavy-metal-contaminated compost on vegetable production, but the available abstract provides only this background context, with no results on contamination or crop impact stated.

Alexandra Evans, Liqa Raschid-Sally, Olufunke Cofie · · Global

This chapter presents three case studies in which multi-stakeholder processes were used to improve wastewater management for urban agriculture. Although differences were observed, there were several cross-cutting lessons. A critical factor is the starting point, including an agreed definition of the problem to be addressed, negotiated goals, and a management structure acceptable to all stakeholders. When multi-stakeholder processes are externally initiated, it is essential that project priorities are commensurate with local priorities.

袁新华 · 环境 · Global

Amidst the trend of sustainable development, various environmentally friendly lifestyle attempts have spontaneously emerged worldwide. Examples include neighbors sharing laundry rooms and gardens to reduce resource consumption, exchanging old refrigerators for food or pianos via radio programs, and transforming abandoned land into community gardens. People who enjoy these sharing and collaborative behaviors are called "Pīn Kè".