Research & reports

Zhuoran Yan, Wenbo Li, Lingxue Yu, X W Li, Kun Bu, HuanJun Liu · npj Urban Sustainability · China (Changchun)

This study investigated the summer impact of peri-urban agriculture (PUA) on surface urban heat island (SUHI) mitigation across China using time-series satellite observations and a coupled land-atmosphere model for Changchun City. It found that PUA management changes with urbanization pressure, and widespread agricultural marginalization near cities significantly impacts SUHI during summer. Larger cities derive less thermal benefit from PUA, although an agricultural intensification scenario showed a limited average cooling effect of 0.07–0.16 °C on urban cores.

Caroline Merheb, Joshua S. Caplan, Pralad Phuyal, Jordan Macknick, Nicholas C. Davatzes, Sujith Ravi · npj Urban Sustainability · Global

This study evaluated ground-based agrivoltaics in an urban context. It demonstrated that while early-season yields may decline due to light reduction in temperate climates, productivity rebounds during periods of extreme heat, extending harvest windows and enhancing crop resilience.

Gang Wang · Agricultural History · China (Shanghai)

This historical analysis of Shanghai's vegetable supply system examines the limitations of peri-urban agriculture. In the early 1950s, Shanghai relied on distant rural areas for vegetables, shifting to suburban production in 1958 after rural sources were cut off. Efforts to sustain this suburban-centric system faced challenges, and government attempts to phase out the planned economy in the 1980s had limited effect. By the early 1990s, the suburban-centric system was abandoned, leading to a return to nonlocal vegetable predominance.

Evangelista et al. · Agronomy for Sustainable Development · Europe

This 8-year case study tracked tomato cultivation in a rooftop greenhouse. Peak yield reached 49 g plant−1 day−1 in the 2023 cycle, but overall yield declined by 31.2% across the 8 years. Best water use efficiency reached 36.8 g/L under reduced irrigation. Solar transmittance dropped from 50.9% in 2015 to 46.4% in 2023 due to polycarbonate degradation, and life-cycle global warming impact rose from a minimum of 0.54 kg CO2eq to 0.94 kg CO2eq in 2023.

Limachi Pérez, Vicente · Macedonian Journal of Medical Sciences (University of Skopje) · Bolivia (Cochabamba)

This study examined the influences of family, school, and sociodigital networks on environmental awareness among secondary school students in urban and rural Cochabamba, Bolivia. Data from three schools showed students' environmental concerns varied by region, and the internet was their primary information source. Despite isolated initiatives like school gardens, schools did not effectively integrate environmental education into the curriculum, limiting its formative impact.

Liu Xinyun, Zhao Jianya, Zhang Yanglan, Wang Shu · Rural and regional development · China (Guangdong)

A study using 2017–2022 panel data in Guangdong Province, China, investigated urban agriculture's (UA) contribution to food self-sufficiency in highly urbanized regions. By categorizing cities by urbanization rate and analyzing spatial-temporal patterns in grain, vegetable, and fruit self-sufficiency, findings showed critically low grain self-sufficiency in high-degree urbanized cities. Despite incremental gains in UA productivity, urban yields for grains and vegetables lagged behind non-urban areas, indicating a limited contribution.

Kyla D. Schulte, Caleb J. Wilson, Anna Tawril, Mary A. Jamieson · Ecosphere · United States (Michigan)

A three-year study across 10 strawberry farms along a rural-urban gradient in Michigan, USA, characterized bee abundance, diversity, and community composition. The study found that urbanization, measured as impervious surface cover, had no consistent effect on overall bee abundance and diversity. While urbanization differentially influenced specific taxa (Halictini positively in year one, Ceratinini negatively in year three), the overall impact was limited, with wild bees, especially native species, being important pollinators in urban agriculture.

Dauda Rotimi Awoniran, Temitayo Abayomi Adeseye, Shakirulah Olayemi Agboola, Shade Babalola · Sustainability Science and Resources · Nigeria (Lagos)

This study examined agricultural land use change in Lagos Metropolis, Nigeria, between 1984 and 2024 using Landsat satellite images and spectral indices. Findings indicated that farmlands in the study area declined by 13.03% between 1984 and 2013, and by 21.79% between 2013 and 2024. Between 1984 and 2013, 89.48% of farmlands were converted to other land uses, and between 2013 and 2024, 73.51% were converted. Normalized Difference Vegetation Index (NDVI) results also indicated a deterioration in the environmental condition of urban farmlands.

Sergi Ventura, J.R. Armengol Miró, David Camacho-Caballero, Enric Casellas, Ricard Segura-Barrero, Alberto Martilli, gara villalba · Urban Climate · Spain (Barcelona)

This study used the Pseudo Global Warming method and WRF model to assess urban heat adaptation strategies in the Metropolitan Area of Barcelona. Three strategies were evaluated: increasing rooftop albedo, implementing irrigated sedum green roofs, and increasing peri-urban agriculture and urban parks. While increasing rooftop albedo provided the greatest daytime cooling (−1.75 °C), and green roofs and peri-urban agriculture showed moderate regulation, none of the strategies fully counterbalanced the projected 6 °C temperature increase by 2100, indicating a limited capacity of these adaptations under severe warming scenarios.

Sreejith Aravindakshan, Hage Aku, Michi Tani · · India

This study investigated factors inducing the emergence, sustenance, and sustainability of urban agriculture using primary data from urban farming households in Kerala and Arunachal Pradesh, India. The research indicates that urban agriculture has provided questionable environmental gains and has not significantly improved urban food security, especially among the poorer sections.

Bernard Afiik Akanpabadai Akanbang, Millicent Awialie Akaateba, Prosper Issahaku Korah · Discover Cities · Ghana (Wa)

This exploratory cross-sectional survey in seven rapidly growing neighborhoods in Wa, Ghana, administered 285 questionnaires to residents to understand motivations, challenges, and constraints of home gardening. Results showed 56% of respondents had gardens, primarily motivated by beautification (56.1%) and food production (52.3%). Limited space (49%) and busy schedules (34%) were identified as main barriers. The study found that while garden ownership aligned with the autonomy need, the relationship need, which correlates with environmental motivations, was notably low among residents. This indicates a limited effect of environmental awareness on home gardening motivation in the surveyed population.

Cavani Guzmán, Pierina · Macedonian Journal of Medical Sciences (University of Skopje) · Peru (Lima)

This article discusses the impact of urbanization and industrialization processes on peri-urban agricultural production in the Nuevo Horizonte de Carapongo association in Lurigancho, Lima, Peru. The research analyzes the development of these phenomena and their relationship with the changes generated in the agricultural production of the area, contributing to the academic discussion on the deagrarianization process of peri-urban spaces.

Rini Fitri, Achmad Yozar Perkasa, Hinijati Widjaja, Olivia Seanders, Reza Fauzı · Tekirdağ Ziraat Fakültesi Dergisi · Indonesia (Jakarta)

This research evaluated the sustainability of urban farming development in Petamburan, Central Jakarta, using a descriptive qualitative methodology and Multi Dimension Scaling (MDS) approach. While urban residents generally have knowledge and support for urban agriculture, the analysis of four dimensions (ecological, economic, social, technological) indicated that urban farming in Petamburan is not sustainable. The sustainability index was very low, categorized as destructive and unsustainable across ecological (14.55%), economic (13.85%), social (13.94%), and technological (13.43%) dimensions.

Yihang Hu, Junbiao Zhang, Yangmei Zeng, Jie Li · Land Degradation and Development · China

A study in Zhejiang Province, China, examined the impact of climate factors on agricultural production efficiency using a pooled OLS model. While precipitation production potential showed a significantly positive impact, the effects of temperature, evapotranspiration, and insolation were not significant or exhibited poor stability. Furthermore, the benefits of precipitation potential varied, with only a few cities experiencing significant improvements.

Ion Martínez Lorea · Revista Española de Sociología · Spain (Pamplona)

This article uses Henri Lefebvre's concept of concrete utopia to analyze the practices of community urban gardens in Pamplona-Iruña, Spain. It interrogates their potential and limitations in responding to various situations of social vulnerability and rethinking the relationship between the rural and the urban.

Alexandra Zink, Paul J. CaraDonna, Kelly Larsen, Amy M. Iler · Ecosphere · United States (Chicago)

This study investigated how urbanization relates to pollination by growing 240 plants (squash and tomato) across six sites with varying urbanization levels in Chicago, Illinois. For tomatoes, the magnitude of pollen limitation increased with greater impervious surface, indicating more pronounced pollination deficits at highly urbanized sites. For squash, evidence of pollen limitation was found only at the most urban site, with a weak trend of pollen limitation of fruit set (but not seed set) increasing with impervious surface.

Herbert Mandigo, Teddious Mhizha, Terence Darlington Mushore · Applied Sciences · Zimbabwe (Harare)

This study investigated the implications of urban growth on maize yield in Harare metropolitan city, Zimbabwe, from 1984 to 2018 using Landsat data. Cropland area was reduced from 11,120 ha in 1984 to 2631 ha in 2018. Consequently, the estimated average maize yield decreased significantly from 52,264 tons in 1984 to 12,366 tons in 2018, demonstrating that urban growth has the potential to compromise food security.

Sadika Parvin, Md. Shahidul Islam · Khulna University Studies · Bangladesh

This descriptive quantitative study assessed the social acceptance of rooftop gardens among city dwellers in Bangladesh, surveying 475 participants online. While approximately three-quarters of respondents showed positive attitudes towards rooftop gardening, about one-third had negative attitudes, indicating unwillingness, with similar trends observed for behavioral perceptions. The study revealed that one-third of respondents still held negative attitudes and just over one-third had negative behavioral perceptions towards rooftop gardening.

Radenka Kolarov, Mirjana Ljubojević, JOVANA SUCUR ELEZ, Mirjana Adakalić, BILJANA LAZOVIC, Dejan Prvulović, Sezai Erċışlı, DJORDJE MALENCIC · TURKISH JOURNAL OF AGRICULTURE AND FORESTRY · Serbia

This study compared bioactive compounds in pomegranate genotypes from a continental region (Sremski Karlovci, Serbia) and a Mediterranean urban region (Bar, Montenegro). Analysis of phenolics, tannins, flavonoids, proanthocyanidins, pigments, vitamin C, acidity, pH, and sugars, along with DPPH and ABTS antioxidant tests, revealed that pomegranates grown in the continental area had significantly higher amounts of biochemically active compounds than those from the Mediterranean urban region. This suggests adaptation to continental conditions, with continental samples showing greater antioxidant potential and proanthocyanidins content.

Mekonnen Amberber Degefu, Fantu Kifle · Climate Services · Ethiopia

This study examined the impacts of climate variability on vegetable production among 156 randomly selected vegetable farmers along the little Akaki River in Addis Ababa, Ethiopia. Climate data from 1996 to 2020 and farmer perceptions revealed high coefficients of variation for monthly and annual precipitation. Farmers perceived increased floods/rainfall (44.9%), drought frequency (13.5%), temperature (89.7%), and decreased vegetable productivity (86.5%). High precipitation and temperature variability negatively affect vegetable productivity, with nonadaptation (36.5%) also reported as an adaptation option.

Ada Górna · Prace i Studia Geograficzne · Global

A study analyzed urban agriculture supply chains in Havana, Kigali, Bissau, and Singapore based on fieldwork conducted from 2018 to 2020. It found that while shortened supply chains are typical for urban agriculture, their benefits are not arbitrary and depend on local economic, social, and spatial conditions, as well as the supply chain's organization and structure. The positive effects of localized food production are not universal, indicating a need for further research into supply and value chain structures.

Ndeyapo Nickanor, Lawrence N. Kazembe, Jonathan Crush · · Namibia

A household survey of 853 households in Namibia's Oshakati-Ongwediva-Ondangwa (OOO) urban corridor found 77% household food insecurity and a mean dietary diversity of less than 5. The most common coping strategies were relying on less preferred and less expensive foods (67%) and rural-urban food transfers (55%). Urban agriculture was found to be very limited in this region.

Christine Costello, Zeynab Oveysi, Bayram Dündar, Ronald G. McGarvey · Environmental Science & Technology · United States (Chicago)

This study used optimization techniques to assess the land area and radius needed around Chicago, Illinois, to meet nutritional needs. It found that no mix of food items could satisfy vitamin D, B12, and calcium needs within a 650 km radius. While urban agriculture reduced the required radius by 10-15 km, significant nutrient fortification or supplementation was still necessary to localize the food system.

Anjali Mistry, Manfred Spocter · · South Africa (Cape Town)

A study in a middle-class suburb of Cape Town, South Africa, investigated edible cultivation and garden waste management in domestic gardens. While potential gardening space averaged two-thirds of residential plots, 129 respondents primarily cultivated lawns, not food, with minimal vegetable production. Residents often used private gardening services for waste disposal, and on-site garden waste disposal techniques need promotion.

Kyla D. Scherr, Mary A. Jamieson · Basic and Applied Ecology · United States (Michigan)

This three-year study investigated environmental factors influencing strawberry productivity for two cultivars at ten farms across a rural-urban gradient in Michigan, USA. It found no direct effect of urbanization on strawberry production or fruit pathogen and pest damage, but temperature significantly influenced crop productivity, with cooler rural and warmer urban temperatures limiting fruit number. While no relationship was found between urbanization and overall arthropod pest, predator, or pollinator abundances, Vespidae abundance was positively associated with urbanization, and Araneae abundance was negatively associated.