Research & reports

Pavlo Ardanov, Annette Piorr, Alexandra Doernberg, Sonja Brodt, Jennifer B. Lauruol, Iryna Kazakova, Valentyna Movchan, Lucas A. Garibaldi · Agroecology and Sustainable Food Systems · Global

This study assessed information from multiple sources to design diversified cropping systems with vegetables and spice crops for cold temperate climates, integrating trait and observational data from databases, farmer surveys, and literature reviews. While farmers achieved medium to good levels of their main goals, they failed to reach desired multifunctionality with their polycultures. None of the individual data sources provided a comprehensive dataset, but combining them increased crop combination options while also increasing planning and management complexity.

Jiangxiao Qiu, Hui Zhao · EDIS · Global

This overview identified eight ecosystem services generally attributed to urban agriculture, including food production, microclimate regulation, stormwater retention, and social-cultural values. However, the study found that quantitative evidence for many of these ecosystem services, especially intangible ones, is scarce. It suggests that while urban agriculture could be integral to green infrastructure, further consideration is needed for types, technology, management, and potential tradeoffs.

Ana H. Ladio, Melisa Longo, Soledad Molares · Ethnobotany Research and Applications · Argentina (San Carlos de Bariloche)

This qualitative study analyzed the resilience processes of agroecological farmers at the Free Fair of Family Farmers from Nahuel Huapi in San Carlos de Bariloche, Argentina. The fair's main resilience principles include high agrobiodiversity, learning and connectivity, cooperation, and adaptive systemic thinking. However, the economic and cultural viability of this fair is uncertain due to the drastic socio-environmental changes experienced in the region.

Bethaney Turner · · Global

This chapter explored human-soil relations in urban home and community gardens through ethnographic fieldwork. While biodiverse soil offers direct health benefits, the presence of contaminated, toxic soils, prevalent in lower socio-economic neighborhoods, was shown to expose inequities in access to safe gardening sites and hinder the realization of potential therapeutic benefits. It argues that the therapeutic benefits of gardens are best realized when humans cultivate attentive relationships with myriad multispecies companions.

Tuyet Truong, Khoirunnisa Khuzaimah, H.T.M. Pham, Ho Ngoc Son, Tuan Van Bui, Long Ha · SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY · Vietnam (Son La Province)

A study surveyed 39 local farmers in Buot village, Son La province, Vietnam, to examine their perception of agrobiodiversity and factors influencing the adoption of syntrophic farming in home gardens. The survey found that most farmers understood the importance of agrobiodiversity and were willing to adopt syntrophic farming. However, challenges in capital, market access, and a lack of irrigation systems were identified as barriers hindering their adoption of syntrophic farming.

Gizaw Ebissa, Kumelachew Yeshitela, Hayal Desta, Aramde Fetene · Environment Development and Sustainability · Global

This study investigated urban agriculture's (UA) contributions to environmental sustainability (ES) using scholarly search engines. Findings indicate UA contributes to ES by mitigating greenhouse gases, urban heat island effects, and floods, while enhancing biodiversity and promoting agro-tourism. However, challenges such as lack of policy support, exclusion from urban land use planning, and urbanites' behavior towards UA products limit its full benefits.

Lukas Egli, Judith Rüschhoff, Joerg A. Priess · Frontiers in Sustainable Food Systems · Global

A systematic review of quantitative empirical research on the sustainability effects of community-supported agriculture (CSA) covered 39 studies. Fewer than 30% of the studies assessed ecological sustainability aspects, but where CSA farms were compared to reference systems, they mostly performed better on resource use efficiency and greenhouse gas emissions. Most studies assessed social aspects; many showed that CSA still fails to reach low-income households, so members do not represent the average population, while CSA membership was associated with improved health and sustainability behavior. Economic variables were assessed in more than half of the studies, but knowledge of CSA's relative economic performance remains scarce, though early studies indicate high economic viability. The review calls for more research on ecological aspects specifically, comparisons across farming and marketing systems, and integration of knowledge from theses and practical sources in multiple languages.

Aikaterini N. Martini, Μ. Papafotiou, Ioannis Massas, Nikoleta Chorianopoulou · Plants · Greece

Origanum dictamnus, a perennial herb endemic to Crete, Greece, was grown at two cultivation sites in Athens — an extensive green roof and ground level next to a moderate-traffic road — in two substrate types at 10 cm depth, to examine growth along with nutrient content (N, P, K, Na) and heavy metal accumulation (Cu, Pb, Ni, Mn, Zn, Fe) in its tissues. Plant growth was favored by the soil substrate but was also satisfactory in the soilless substrate. Cultivation site affected heavy metal accumulation, with higher concentrations found in leaves and flowers at street level, though no differences appeared in roots. Washing reduced heavy metal concentrations only in leaves grown at street level. Substrate type significantly affected manganese concentration in all tissues and iron concentration in roots, with the highest values in the soil substrate. The species could be cultivated on sustainable green roofs, preferably on a soilless substrate to reduce structural weight, but careful selection of the cultivation site was identified as necessary to minimize contamination with environmental pollutants when human consumption is intended.

Stacy M. Philpott, Azucena Lucatero, Sofie Andrade, Cameron R. Hernandez, Peter Bichier · Insects · United States (California)

This study examined how native plant species richness, garden management, and landscape composition affect the abundance and richness of native and non-native bees, ladybeetles, ants, and ground-foraging spiders in urban community gardens (urban agroecosystems) in California, United States. Native plants — about 10% of species but only about 2.5% of plant cover — had little influence on arthropods overall, with the only significant effect being a negative one on non-native spider richness, likely reflecting native plants' low cover. Garden size increased native and non-native bee abundance and richness and non-native spider richness; floral abundance increased non-native spider abundance and native and non-native spider richness; mulch cover and tree/shrub abundance increased non-native spider richness; and natural habitat cover increased non-native bee and native ant abundance but was associated with fewer native ladybeetle species. The study concludes that native plant richness does not strongly influence the abundance and richness of beneficial arthropods.

Nancy Harlet Esquivel-Marín, Leticia Myriam Sagarnaga Villegas, Octavio T. Barrera-Perales, Juan Antonio Lugo Machado, José María Salas González · Acta Universitatis Sapientiae Agriculture and Environment · Europe

This bibliometric review analyzes the systemic structure of multifunctional agriculture (MFA) and its relationship to sustainability, based on a sample of 432 documents published on the Web of Science platform. Using Bibliometrix and VOSviewer to map scientific collaboration networks, the review identified the authors, journals, and countries shaping the current knowledge structure and four thematic clusters: (a) MFA and sustainability, (b) ecosystem services and biodiversity, (c) European public policies, and (d) governance and urban agriculture. It concludes that, despite an increase in publication rates, research remains concentrated in Europe with few collaborative networks across disciplines, indicating that SDG 17 (partnerships) is not being achieved.

Veronica Sebald, Julia M. Schmack, Monika Egerer · Renewable Agriculture and Food Systems · Germany

This study surveyed the occurrence of poisonous plant species in 30 urban community gardens across two German cities, Berlin and Munich, and examined concerns around poisonous and highly poisonous plants in urban garden settings. It found that plants producing substances toxic to humans occur in these gardens while also potentially holding ecosystem-functioning and biodiversity-conservation value, creating a trade-off with the ecosystem service of human health promotion, and concludes that poisonous plants should be carefully monitored and managed—depending on garden participants and the goals of the garden organization—to mitigate health risks while still supporting biodiversity conservation.

Joshua Newell, Alec Foster, Mariel Borgman, Sara Meerow · Cities · United States (Detroit)

A study in Detroit's Lower Eastside (~15 sq. miles) examined the spatial extent, characteristics, and residents' perceptions of urban gardens using spatial analysis and interviews. Gardens covered less than 1% of vacant land and were often ephemeral. Primary obstacles to scaling up urban agriculture in Detroit include uncertainty over land tenure, environmental pollutants, potential ecosystem disservices, and a lack of government support and capital investment.

Fa Likitswat, Alisa Sahavacharin · Journal of Architectural/Planning Research and Studies (JARS) · Thailand (Bangkok)

This research analyzed landscape transformations, specifically agricultural landscape structures and functions, in eight selected sites in the urban fringe of Bangkok from 1952 to 2018. The study found that the significant loss of agricultural landscape in Bangkok's peri-urban areas resulted in the loss of seasonal water retention areas, productive landscapes, and urban wildlife habitats. It concludes there is a research gap regarding the lack of policies and practices to promote ecosystem services linked to preserving peri-urban agriculture in Bangkok.

Joan Casanelles‐Abella, Simone Fontana, Bertrand Fournier, David Frey, Marco Moretti · Ecological Applications · Switzerland (Zurich)

This study in 23 urban gardens in Zurich, Switzerland, examined feeding niche partitioning between wild bees and honeybees. Researchers found that feeding niche partitioning increased with wild bee species richness and in sites with lower landscape-scale resource availability, which also had lower honeybee abundances. However, beekeeping intensity at local and landscape scales did not directly influence community feeding niche partitioning or wild bee species richness, suggesting direct competition for resources was not a main driver for the wild bee community.

Victоria Kryuchkova, Vitaly Donskih, Yuri Gorbunov, Tatiana Aniskina, О. С. Волкова · АгроЭкоИнфо · Russia (Moscow)

This 2011-2022 study at the MBG RAS laboratory in Moscow, Russia, assessed 20 wild apple tree species for their landscaping potential. While Malus baccata, M. neidzwedzkyana, M. x zumi, M. sargentii, and M. mandshurica were identified as promising for urban conditions, M. ioensis showed low frost resistance and M. fusca and M. sievesii were susceptible to scab infestation, limiting their suitability for urban gardening in Moscow.

Can Wu, Xiaoma Li, Yuqing Tian, Ziniu Deng, Xiaoying Yu, Shenglan Wu, Di Shu, Yulin Peng, Feipeng Sheng, Dexin Gan · Agronomy · China (Changsha)

This study investigated the impact of perceived ecosystem services (ES) and disservices (EDS) on behavioral intention towards urban community gardens (UCGs) among 1142 residents in Changsha, China. While government decision-makers often refuse UCGs, residents' attitudes, perceived behavioral control, and subjective norms positively impacted their behavioral intention towards UCGs. Perceived ES had a direct positive impact on behavioral intention, whereas perceived EDS had a direct negative impact.

Jonathan Stubberfield, Mads Troldborg, E. Louise Ander, N.M.J. Crout, Scott D. Young, Rupert Hough · Agronomy · United Kingdom

This study investigated the influence of gardening routines on health benefits and risks among 120 urban gardeners in the UK. Participants showed a correlation between autumn/winter gardening activity and fruit/vegetable consumption, with higher physical activity levels and lower BMI than average. However, while gardening offers health benefits, the health risks from gardening on soils mildly contaminated with cadmium and lead may outweigh these benefits, requiring formal consideration within a risk management framework.

Monika Egerer, Brenda B. Lin · CABI Reviews · Global

This review evaluated ecosystem services (ES) within urban agriculture (UA) systems and the trade-offs between these services. Urban agriculture provides many benefits and environmental services such as food provision, social cohesion, and climate regulation. However, it was shown that management decisions can create trade-offs between ecosystem services, where an increase in one service may potentially reduce the system's ability to provide another service at a desired level.

Ro'fatul Maulaa, Niken Kusumarini, Dian Triastari Armanda · BIOLOGICA SAMUDRA · Indonesia (Semarang)

The potential and constraints of urban farming development on the railroad border in Bangetayu Wetan Village, Genuk District, Semarang City, Indonesia, were investigated through observation, interviews, and documentation. The approximately 1 to 2-hectare area cultivated crops such as corn, cassava, and sugarcane, with yield predictions sufficient to meet food needs. However, the presence of pests, diseases, and weeds were identified as constraints, indicating challenges for urban farming development.

Ainsley C. McStay, S.L. Walser, Eric C. Sirkovich, Nicolas Perdrial, Justin B. Richardson · Journal of Environmental Quality · United States

This study evaluated portable X-ray fluorescence (pXRF) measurements of macronutrients, micronutrients, and toxic elements (As, Pb) in soils and plants from 10 urban community gardens across the eastern United States. It found that pXRF and traditional methods provided agreeable estimates for some elements (Mn, Cu, Zn, Pb) but not for macronutrients (Ca, K, P). While pXRF is an accurate tool for screening Mn, Cu, Zn, and Pb, macronutrients were poorly estimated in fruits, leaves, and roots, and genus-specific and garden-specific factors may be important for plant uptake models.

Jaime Pizarro‐Araya, Fermín M. Alfaro, Francisco Gómez, Roberto Villablanca · Anthropocene Coasts · Chile

A 2022 study characterized the taxonomic richness and abundance of terrestrial arthropod fauna at the Aguada de La Chimba urban coastal wetland in the Antofagasta Region, Chile, using multiple survey methods. From a total of 1,874 specimens, it identified 109 terrestrial arthropod species, with Insecta the most represented taxon (85 species, 47 families, 15 orders); by origin, communities included 24% native, 22% naturalized, and a smaller proportion of endemic species. The study reports that urban coastal wetlands are fragile ecosystems subject to serious disturbance in structure, function, and diversity from advancing urban, agricultural, foraging, and drainage activities, including displacement of endemic species by invasive ones, and discusses the major threats to this wetland alongside the importance of public-private partnerships with the local community for biodiversity conservation.

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.

Hoda Fakour, Shang‐Lien Lo, Nathan Thadeo Yoashi, Angelbetter Marselian Massao, Nelson Naboth Lema, Fezile Bethusile Mkhontfo, Patrick Chris Jomalema, Nasra Shabani Jumanne, Bright Hubert Mbuya, James Travor Mtweve, Moslem Imani · Agriculture · Taiwan (Tainan)

A study in Tainan city farms, Taiwan, quantified and analyzed microplastics (MPs) in farmland soils. MPs were found in all soil samples at depths ranging from 12–117 items/m2. Farms adjacent to suburban roads had approximately three times more MPs than enclosed farms. Fragment and fibers were the main forms, with low-density polyethylene being the dominant polymer, originating from historical land use, plastic mulch, and fruit protection foams.

Marta Crispo, Miriam C. Dobson, Roscoe S. Blevins, William Meredith, Janice A. Lake, Jill L. Edmondson · Environmental Pollution · United Kingdom

Heavy metal (HM) and metalloid concentrations were assessed in 200 urban horticultural soils across ten UK cities. HM were found to be widespread, with most concentrations below UK soil screening values (C4SLs). However, 83% of lead (Pb) concentrations exceeded C4SLs, which is a significant concern. Bioavailable HM concentrations represented a small fraction (0.01–1.8%) of total concentrations, and black carbon (BC) and organic carbon (OC) were suggested to contribute to HM immobilization.

Magdalena Szczepańska, Ewa Kacprzak, Barbara Maćkiewicz, Lidia Poniży · Moravian Geographical Reports · Germany; Poland

A comparative study analyzed the use and development of allotment gardens (AGs) in Westphalia and Lippe (Germany) and Wielkopolska (Poland). AGs in Westphalia and Lippe are accessible and harmoniously integrated into the landscape, while AGs in Wielkopolska are less accessible, prioritize internal users, and do not always blend with their surroundings. The considerable freedom enjoyed by Polish plot-holders leads to a gradual marginalization of edible-plant growing.