Research & reports

Vudipong Davivongs, Sigit D. Arifwidodo · Urban Ecosystems · Thailand

This study surveyed six orchards in Bangkok's Inner Orchard (BIO) to analyze forest structure and tree diversity. It found 98.64% forest canopy cover, an average tree height greater than common orchard trees, and mid-range diversity (Shannon index 2.53). Older orchards showed greater fruit tree species diversity, while newer ones had less.

Pooja Krishna Jayakrishnan, Jayalekshmi Gopalakrishnan Nair, Archana Raghavan Sathyan, Ashutosh Jena, Manju Prem Shiva Reddy · Asian Journal of Agricultural Extension Economics & Sociology · India

This study, conducted from 2019 to 2023 in six agro-ecological units of Kerala's Coastal plains, India, assessed the climate resilience of peri-urban agriculture. Researchers developed a Climate Resilience Index (CRI) based on 72 indicators across absorptive, adaptive, and transformative capacities. The mean CRI was 0.563, with absorptive and transformative capacities contributing most, and water sufficiency and sustainable practices identified as key determinants of resilience.

Dinda Nur Haliza · Jurnal Teknologi Pangan dan Ilmu Pertanian · Indonesia (Jakarta)

Motivated by the risk that conversion of agricultural land in Jakarta, Indonesia, poses to food security, this study developed a conceptual model integrating rainwater harvesting with automatic irrigation for a rooftop greenhouse, based on a literature review of 12 journal articles and 3 textbooks on land conversion, irrigation systems, rainwater harvesting and greenhouse design. The resulting conceptual model shows rainwater collected in an underground reservoir could be supplied via automatic irrigation to crops in a rooftop greenhouse, though the authors state further study is needed on soil moisture requirements for specific plant types and direct testing of the model.

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.

Asa Roast · International Journal of Urban and Regional Research · China

An ethnographic study in Chongqing, Southwest China, examined informal peri-urban agriculture on undeveloped land created by state-led expansion since the early 2000s. This "empty land" is informally used by displaced peasants and migrant workers for agriculture. The study reveals that these spaces are ambiguously positioned outside urban governance and are under threat of rapid enclosure within urban accumulation regimes.

Raktima Ghosh · · India (Kolkata)

This study examined the roles and emergent risks of urban and peri-urban agriculture (UPA) in the Kolkata Metropolitan Area, India, using a mixed-method approach combining empirical findings and geospatial techniques. Field observations and land use land cover (LULC) mapping validated land conversion patterns and the spatial shrinkage of UPA in the Kolkata metropolis. The study revealed current socioecological changes and governance patterns in the context of UPA, indicating that UPA faces multiple challenges arising from land-use transformations, privatization of lands, and changing social equations in the city.

Nurhanis Abdullah, Muhammad Hasan, Citra Ayni Kamaruddin, Nurdiana Nurdiana, Nurjannah Nurjannah · Prosiding Seminar Nasional Pembangunan dan Pendidikan Vokasi Pertanian · Indonesia (Makassar)

This study aimed to determine the economic feasibility of urban agriculture businesses in Makassar City, Indonesia, focusing on production, market/marketing, and financial aspects. Qualitative data was used for production and market analysis, while quantitative data was used for financial analysis with Payback Period (PP) and Net Present Value (NPV). The results indicated that the KWT Anggrek business was feasible in terms of production and marketing, but the financial analysis showed a Net Present Value of -8,005,133, indicating that the business is not financially viable to continue.

Alisara Menakanit, Vudipong Davivongs, Prapassara NAKA, Nath PICHAKUM · Journal of Urban and Regional Analysis · Thailand (Bangkok)

This study investigated land use changes and landscape fragmentation in prime vegetable production areas within Thawi Watthana district, Bangkok, Thailand. A GIS database was used to analyze land use proportions, changes in vegetable production areas, and land configurations from 1976 to 2015. The results showed that vegetable production areas decreased at a rate of 20.38 ha/y, despite the district being designated as an agricultural area in Bangkok's land use planning policies. Fragmentation of the vegetable production matrix increased due to expanded road networks and contiguous roadside urban development.

Subhash Aswal, Harshal Purohit, P. K. Gupta, K. K. Yadav, Laxman Jat, Shipra Jaiswal, R. A. Kaushik · International Journal of Plant & Soil Science · India (Kota)

A quarterly survey in Kota district, Rajasthan, India, characterized wastewater-irrigated soils by comparing them with tube well water-irrigated soils from ten urban sites. The study found decreased sand content, pH, and dehydrogenase activity, while porosity, EC, BOD, COD, OC, available-NPK, SO4, Cl, and heavy metals (Mn, Fe, Zn, Cu, Ni, Cd, Pb, Cr) increased. Some parameters exceeded Indian standard permission limits, indicating contamination, with highest values observed in summer.

Nurhanis Abdullah, Muhammad Hasan, Muhammad Rakib · Prosiding Seminar Nasional Politeknik Pertanian Negeri Pangkajene Kepulauan · Indonesia (Makassar)

This qualitative explanatory study explored the potential of urban agriculture to contribute to sustainable urban development, using KWT Anggrek in Bara-Barayya District, Makassar City, Indonesia, as a case study. Makassar City is suitable for developing wetland, semi-wetland, horticultural, monthly, and seasonal crops by utilizing limited urban land. The findings indicate that urban agriculture is an important component that needs to be well-implemented to achieve sustainable and environmentally conscious urban development.

Gabriel Marcacci, Ingo Graß, Vikas S. Rao, Shabarish Kumar S., K. B. Tharini, Vasuki V. Belavadi, Nils Nölke, Teja Tscharntke, Catrin Westphal · Ecological Applications · India

This study sampled bees across three seasons in 36 conventionally managed vegetable farms along an urbanization gradient in Bengaluru, a tropical megacity in India, to assess how urbanization affects the functional diversity of farmland pollinators. Functional responses were trait-specific: larger, solitary, cavity-nesting, and specialist bees benefited from urbanization, while ground-nesting bees increased in urban areas, in contrast to patterns seen in temperate cities. However, overall bee abundance and the abundance of social bees (85% of all bees sampled) decreased with urbanization, which the study identifies as a threat to crop pollination. Crop diversity promoted taxonomic and functional diversity, flower resources promoted abundance, and exotic plants decreased functional diversity and bee specialization. The authors recommend preserving semi-natural vegetation such as hedges, diversifying crops, maintaining native vegetation along field margins, and controlling invasive exotic plants.

LENI MARIA TARIGAN, I MADE SUDARMA, I Nyoman Gede Ustriyana · Jurnal Agribisnis dan Agrowisata (Journal of Agribusiness and Agritourism) · Indonesia

A study of the agricultural sector's role, leading sectors and competitiveness in Tebing Tinggi City, North Sumatra Province, Indonesia, over 2015–2019, using descriptive analysis, the Location Quotient (LQ) method and shift-share analysis, prompted by rapid conversion of agricultural land in the city. Results show agriculture is not the largest contributing sector, with food crops driving most of the sector's growth; the city has 12 leading and 5 non-leading sectors, with a projected future of 5 leading, 7 prospective, 5 lagging sectors and no mainstay sector. Wholesale/retail trade and vehicle repair, and health and social services, were the sectors with good competitiveness. The study recommends using household yards for community gardens, fish ponds and livestock, implementing a "Culinary Tourism City" concept, and strengthening support for lagging sectors to maintain food security.

Hae Jong Yang, Tae‐Woo Kang, Byungwoong Choi, Soon Hong Hwang, Dongseok Shin, Won-Pyo Park · Sustainability · South Korea

This study verified heavy-metal pollution levels in sediments of an urban-agricultural watershed in the Yeongsan River basin, South Korea, through evaluation of Sediment Quality Guidelines (SQGs), a pollution load index (PLI), and a potential ecological risk index (PERI), and analyzed statistical relationships between pollution levels, land use, and potential pollution sources. Pb, Zn, Cu, Cd, and Hg concentrations were highest at mid-upstream sites, while As, Cr, and Ni concentrations were similar across most sites. Sites showing potential toxicity to benthic organisms relative to SQGs were most frequently observed at mid-upstream, and PLI and PERI evaluations likewise confirmed high anthropogenic pollution and ecological risk there. Mid-upstream sites with high heavy-metal pollution correlated strongly with urban land use — the largest land-use category — indicating links to population density and industrial complexes; statistical analysis confirmed this relationship. The findings indicate that urban areas are highly likely to cause anthropogenic heavy-metal pollution of sediments via point and non-point sources such as domestic sewage and industrial wastewater.

Nurul Azizah, Dewi Ratih, U′ud Uda Marlina, Moch. Raihan Ramadhan · Jurnal Bisnis Indonesia · Indonesia (Surabaya)

In Wonorejo, Tegalsari district, Surabaya, Indonesia's second-largest metropolitan city, where land conversion to housing and public buildings has made greening difficult, residents used vertikultur (vertical, tiered plant cultivation with repurposed plastic bottles mounted on house walls) as a greening approach for limited land. The program's success was indicated by residents' enthusiasm and by aesthetic, health, and economic benefits reported from the practice.

Harniati Harniati, Reni Suryanti · Jurnal Penyuluhan Pertanian · Indonesia

This study investigated urban farmers' accessibility to agroinputs in intra-urban (Situ Gede, Margajaya) and peri-urban (Pasir Buncir, Pasir Eurih of Tamansari) areas in Indonesia. The findings revealed that land, labor, feed concentrate, fertilizer, and seeds are difficult for farmers to access. Specifically, peri-urban paddy land ownership is less than 0.2 Ha, intra-urban farmers are landless, outside labor is limited and expensive, and feed concentrate for sheep is rarely available and unaffordable. These limited accessibilities present problems and challenges for urban agribusiness development.

黄甘霖 HUA Yeyu 华野毓 · Acta Ecologica Sinica · China (Beijing)

Ecosystem services from peri-urban organic farms in Beijing, China, were evaluated as of 2019. It was found that there were 271 organic farms in the suburbs of Beijing, covering a planting area of 10,900 hectares, accounting for 5.1% of the arable land in Beijing. Provision services were valued at 1.612 billion Yuan, regulation services (soil carbon sequestration) at 21.4 million Yuan, and cultural services (picking, farmers' markets, education activities) at 118.9 million Yuan. Organic farms also reduced energy use and emissions compared to conventional farms of the same area.

Seema Purushothaman, Sheetal Patil, Raghvendra S. Vanjari, A. R. Shwetha · · India (Bengaluru)

A participatory assessment in Byramangala, Bengaluru, explored farmers' perspectives on using wastewater (domestic sewage with industrial effluents) for irrigation. The study found that farmers were adapting to a heavily polluted environment, which resulted in restricted crop choices, lower produce prices, health impacts, and socio-cultural consequences. Despite concerns about water quality, farmers prioritized health-imparting agriculture and were keen to continue farming, but their preference for treated wastewater was overshadowed by its potential diversion for urban use.

Dong BaoCheng, Wei Li, Wenyong Xu · Antibiotics · China

A field experiment in peri-urban agricultural soil in China investigated the effects of partially substituting chemical fertilizer with organic fertilizers like pig manure and sewage sludge on soil quality and antibiotic residues. Organic substitution significantly increased residual antibiotic levels in agricultural soil, with antibiotic sequestration rising by 138.1~332.5%. This indicated that organic fertilizers can promote antibiotic persistence in soil by modifying soil quality, demonstrating a contamination risk.

Zachary Burt, C. Shambu Prasad, Pay Drechsel, Isha Ray · Journal of Water Sanitation and Hygiene for Development · India (Karnataka)

A preference-ranking model was developed to understand the acceptance of fecal sludge-derived fertilizer (FSF) in Karnataka, India, by modeling farmowners and farmworkers separately. The study found that farmers willing to use FSF prefer to conceal its origins from workers and their caste group, especially caste-adhering, vegetarian farmowners. Workers were open to FSF if it resembled cow manure, revealing that the waste economy in rural India is shaped by unacknowledged caste hierarchies and practices.

Xingjia Wang, Wenbo Li, Dongyan Wang, Songze Wu, Zhuoran Yan, Jiaqi Han · Ecological Indicators · China

A 'trinity' assessment method was developed to evaluate heavy-metal contamination in peri-urban soil–crop systems in Northeast China, covering total, available, and accumulated heavy metals. While traditional methods indicated less contamination, the trinity method revealed spatial clustering of heavy-metal contamination in cultivated lands caused by urbanization and industrialization, and a decreasing urban–rural trend in contaminated areas, particularly in transition zones.

Umbu Joka, Aprianus Nelson Bana · Agribusiness Journal · Indonesia (Kefamenanu City District)

This survey study, conducted in June 2020 with 20 farmers from the Nekaf Mese farmer group in Benpasi Village, Indonesia, aimed to determine the income and relative advantages of urban bean farming. Farmers cultivated 6-9 acres, generating an average revenue of Rp. 1,827,500 and an average income of Rp. 796,050 per planting season. The average relative profit was 1.74, indicating economic profitability.

Pratik Mishra, Sumit Vij · · India (Gurugram)

Ethnographic research in Budhera, a peri-urban village bordering Gurugram city in Haryana, India, investigated the juxtaposition of urbanization processes and climate variability impacts on peri-urban agriculture. Results showed that dimensions of agrarian livelihoods, such as cropping choices, irrigation cycles, sharecropping arrangements, declining common property resources, and land use changes to non-agricultural uses, were influenced by urbanization processes. It was concluded that changes in land and water use reshape agricultural practices and can cascade upon climate variability impacts, making agriculture more precarious for peri-urban farmers.

Wei Cao, Shenglü Zhou, Minyu Zhou · Land · China

This study analyzed urban-rural reality in Pukou District, Nanjing City, China, and investigated farmers' willingness to achieve urban-rural integration through land use. Pukou District was divided into four land use areas based on resource environment, development intensity, and potential, and most farmers showed a strong willingness for urban-rural integration via land use. The study proposes an operational pattern for regional land use, based on "reality + willingness + policy," utilizing farmland reconsolidation, village reconstruction, and factor reallocation to achieve urban-rural integration.

Tamy Erissanti, Supadi Supadi, Suharno Suharno · Jurnal Ekonomi Pembangunan Kajian Masalah Ekonomi dan Pembangunan · Indonesia (Jakarta)

This study analyzed the efficiency of rice farming and factors affecting rice production in North Jakarta, Indonesia, using the Stochastic Frontier Analysis (SFA) method with a sample of 80 rice farmers. Findings showed an average technical efficiency of 0.85, allocative efficiency of 3.47, and economic efficiency of 2.95. Land area and fertilizer positively affected production, while labor and education had a significant negative effect, and ownership rights had no significant effect.

Wei Li, Yang Zhou, Zhanwei Zhang · Land · China

A study analyzing rural planning through policy analysis and focus-group interviews in Pu'an Village, a peri-urban village near Changzhou city in China's Yangtze River Delta. It examines the process of identifying the bulrush as a local multifunctional cultural symbol and proposes a "bulrush + creative industry" framework, with a creative processing industry as the core and creative planting and creative tourism as two extended industries. The research emphasizes participation by local villagers, outsiders and urban tourists, and the creative class and entrepreneurs, stressing the revival of local rural culture in peri-urban villages.