Research & reports

Syariful Mubarok, Salsabila Ananda, Farida Farida, Ainun Fadilah, Rija Sudirja · Kultivasi · Indonesia

An experiment conducted from August to September 2020 in a densely populated residential area on Jalan Caringin Raya, Bekasi City, Indonesia, used a Randomized Block Design to grow two amaranth (bayam) cultivars, 'Maestro' and 'Mira,' under three different cultivation systems — conventional, verticulture, and floating-raft hydroponics — with four replications each, on narrow urban plots. The results showed that amaranth grown under the floating-raft hydroponic system produced the best growth, yield, yield quality, and revenue compared with the conventional and verticulture systems.

Ram Ranjan · Water Economics and Policy · India

This study examines the potential for industrial wastewater remediation through agroforestry in a peri-urban farming region of India. Under a payment for ecosystem services (PES) mechanism, farmers are incentivized to convert farmland into poplar-based agroforestry and use industrial effluent to irrigate the trees, with income from poplar timber sales enhancing the mechanism's attractiveness. A dynamic optimization model compares farmers' optimal land use allocation to a socially optimal case, and compares the firm's effluent discharge outcomes to an alternative arrangement in which it is fined for discharging untreated wastewater without the agroforestry remediation option. The results support the attractiveness of such PES mechanisms in addressing industrial effluent discharge while simultaneously mitigating water scarcity through wastewater reclamation. The optimal tax level required to achieve complete effluent treatment is several times higher than PES payment levels. The incentive to convert farmland to poplar plantations increases with higher PES payments but declines as the profitability of agricultural crops rises.

Shrabana Mazumder, Joydeep Saha, Gouranga Nandi, Mrinmoyee Naskar, Jibananda Gayen, Debajit Datta · SN Applied Sciences · India

A study of the Kolkata Metropolitan Area, India, used free and open-source geospatial software and multi-temporal databases to assess land use/land cover change from 1990 to 2020, focusing on the transformation of urban and peri-urban agricultural land, and projected cropland change to 2030 using an artificial neural network module (MOLUSCE). Built-up areas persistently expanded into croplands, wetlands, vegetation, and water bodies throughout the period, with an estimated loss of 181.11 sq km of cropland between 1990 and 2020, concentrated in the northern, eastern, and south-eastern parts of the study area. The 2030 projection indicates a further loss of 15.46 sq km, bringing the cumulative cropland loss to 37.39% of its 1990 extent under current socio-economic and administrative conditions.

Nanik Furoidah · Jurnal Layanan Masyarakat (Journal of Public Services) · Indonesia

The PKK group in Dawuhan Lor Village, Sukodono District, Lumajang, East Java, Indonesia, has cultivated plants with limited knowledge. This community partnership program (PKM) aims to introduce urban farming models, including hydroponics and portable cultivation innovations for vegetables, fruits, and herbs. The target is to achieve 15-25% self-sufficiency in daily vegetable and herb needs, enhance the home environment, and contribute to household food security.

Nur Arifaini, Ika Kustiani, Purba Aleksander, Amril Ma’ruf Siregar · · Indonesia (Bandar Lampung)

A community service program in Rajabasa Jaya Village, Bandar Lampung, Indonesia, addressed land conversion and irrigation issues in an urban fringe agricultural area. The program aimed to empower the Harapan Kita Women Farmers Group by providing training on urban farming methods for ginger cultivation in home gardens. It also included installing instant herbal ginger processing machines and training on producing instant ginger to enhance the economic value of their harvest.

Priya Ranjan Kumar, Sudarshan Maurya, Asit Chakrabarti, V K Yadav, Soumen Naskar, Sanju Gupta, Sonal Kumari, Arun Kumar Singh, B. P. Bhatt, Bikash Das · The Indian Journal of Agricultural Sciences · India (Jharkhand)

This two-year experimental study in four villages near Ranchi, Jharkhand, India, tested technological options to improve the profitability of peri-urban agriculture systems. Farm households were classified into five typologies based on agri-economic conditions. The experiments indicated that options such as rainy season cultivation of solanaceous vegetables, cultivation of wheat and chickpea in rice fallow, parasite management in animals, and oyster mushroom cultivation increased income from agricultural production systems for all farmer typologies. Notably, income from non-farm sources decreased across all five typologies.

Mila Siti Fatimah, M.S Ir. Eko Hanudin, Ph. D. Toru Watanabe · · Vietnam

This study investigated heavy metal contamination in soils, vegetables, and irrigation water in peri-urban agricultural areas of Hue, Vietnam, from May 2018 to January 2019. Samples from three sites revealed that while irrigation water and agricultural soils were not seriously contaminated, 14% of vegetables were contaminated by Cr, 76% by Cd, and 47% by Pb. The consumption of vegetables was categorized as a tolerable health risk.

Abraham Verghese, Rakshitha Mouly · Pest Management in Horticultural Ecosystems · India

A report documenting the giant African snail (Achatina fulica) in urban and terrace gardens in Bengaluru, India (12°57'N, 77°38'E, 965 MSL) over a six-month observation period, in peri-urban horticulture. Its occurrence in Bengaluru (formerly Bangalore) was first reported in 1979, more than a century after two specimens were introduced into a garden in Calcutta (Kolkata) by William Henry Benson in 1847, after which it is assumed to have spread across India and much of Asia; the paper cites the genetic closeness of current snail populations to the original Kolkata specimens as evidence for this spread.

Jaekyoung Kim, Sang Yeob Lee, Junsuk Kang · Sustainability · South Korea

Using ENVI-Met simulation on the campus of Seoul National University, South Korea, researchers quantitatively analyzed how different rooftop garden arrangement patterns affected temperature reduction. Extreme and linear (longitudinal) configurations achieved the greatest maximum reduction at -0.3°C, while the checkerboard pattern achieved the lowest maximum reduction at -0.2°C, with the largest impact over broader areas occurring in the mornings rather than the afternoons.

Stephan Pauleit, Didit Okta Pribadi, Hany Abo El Wafa · DOAJ (DOAJ: Directory of Open Access Journals) · Indonesia (Jakarta)

The continued existence of agriculture in and near urban areas, such as in Jakarta and Addis Ababa, is an important means to strengthen city resilience. However, its importance is still poorly, or at best intermittently, acknowledged by politicians and urban planners, who are inspired by visions of "modern" cities where agriculture is considered a negligible activity.

Wojciech Mrozik, Soydoa Vinitnantharat, Thunchanok Thongsamer, Nipapun Pansuk, Pavinee Pattanachan, Parinda Thayanukul, Kishor Acharya, Marcos Quintela‐Baluja, Charles R. E. Hazlerigg, Aidan Robson, Russell J. Davenport, David Werner · The Science of The Total Environment · Asia

A study of three family-owned peri-urban aquaculture operations downstream of Bangkok, Thailand — spanning extensive, semi-intensive and intensive practices — used micropollutant analysis, genetic markers and 16S rRNA amplicon sequencing to assess water quality against aquaculture standards. Canals draining Bangkok did not meet quality standards and were sources of faecal coliforms, Bacteroides, Prevotella, human E. coli, tetracycline-resistance genes and nitrogen entering the ponds, causing algae blooms. The aquacultures in turn discharged salinity and the herbicide diuron into the canals; diuron was detected in shrimp, though not at a level of concern to human health. The extensive aquaculture attenuated an estimated 20 population equivalents of nitrogen pollution and trillions of faecal coliform inputs per year.

Dan Yu, Dongyan Wang, Wenbo Li, Shuhan Liu, Yuanli Zhu, Wenjun Wu, Yongheng Zhou · Sustainability · China (Changchun)

This paper assessed the landscape ecological security (LES) of peri-urban cultivated land in Changchun City, China, at three time points, considering both cultivated and surrounding landscapes. Results showed that urbanization affected the peri-urban cultivated landscape, with metrics like patch density and edge density progressively increasing for cultivated land within 20 km of the urban center. This indicated elevated fragmentation and vulnerability, and the study concluded that decreased LES of cultivated land impedes sustainable peri-urban agriculture.

Wiwandari Handayani, Prihadi Nugroho, Dini Oktaviani Hapsari · DOAJ (DOAJ: Directory of Open Access Journals) · Indonesia (Semarang)

This study used descriptive and spatial analyses with secondary and primary data to assess the potential and co-benefits of urban farming in Semarang City, Indonesia. It identified two types of urban farming: conventional approaches in the city outskirts and hydroponic or limited-space methods in the city center. The study found various potentials, including vegetables, cassava, sugarcane, durian, and mushrooms, and noted co-benefits across environmental, economic, social, health, education, and tourism aspects.

Mohammad Rondhi, Pravitasari Anjar Pratiwi, Vivi Trisna Handini, Aryo Fajar Sunartomo, Subhan Arif Budiman · Land · Indonesia (East Java)

This paper investigated the inter-relationship between land economic value and agricultural land conversion (ALC) in East Java, Indonesia. It calculated the land economic value for agricultural and non-agricultural (housing) uses in two areas: a peri-urban agricultural area facing rapid urbanization and a rural agricultural area with zero ALC. Results showed that agricultural land yielded a higher economic benefit in rural areas, whereas in urban areas, housing yielded a value seven times higher than agricultural land.

M. L. Dotaniya, V. D. Meena, S. Rajendiran, M. Vassanda Coumar, Asha Sahu, J. K. Saha, S. Kundu, Hiranmoy Das, A. K. Patra · Journal of the Indian Society of Soil Science · India (Bhopal)

A case study in peri-urban agricultural lands near Patranala, Bhopal, India, investigated the impact of over 50 years of untreated sewage water irrigation on soil properties. Findings showed higher concentrations of heavy metals in surface soils of sewage-irrigated fields, posing a major concern. Conversely, soil microbial population, enzymatic activities, and organic carbon content were also higher, indicating enhanced carbon sequestration.

J.H. Kwag, Eun‐Jeong Cho, Mi-Eun Jeong, Kwang-Yong Ju, Dae‐Young Jeon, Hui-Cheol Jeong · 한국토양비료학회지 · South Korea (Busan)

This study analyzed the chemical properties of soils from 29 urban vegetable gardens in the Busan area, South Korea. Urban area vegetable garden soils showed high content of organic matter and exchangeable cations, suggesting more fertilizer application in these areas. Average values for soil fertility items were pH 6.87, organic matter 43.4 g kg-1, available phosphate 845.3 mg kg-1, K+ 1.30 cmol kg-1, Ca2+ 17.27 cmol kg-1, Mg2+ 2.88 cmol kg-1, and electrical conductivity 2.66 dS m-1.

C. Kavya, G. N. Nagaraja · Indian Journal of Economics and Development · India

This study classified farms around Bengaluru as having high or low urban influence (FHUI/FLUI) and applied a linear hedonic pricing model using simple random sampling of 120 farmers, 30 FHUI and 30 FLUI each from the Devanahalli Airport area and the Ramanagara Industrial Park area. Land market value was shaped by location, water availability and land-symbolizing patterns, fluctuating widely even within the study areas depending on the intensity of urban influence; land values in Devanahalli peri-urban and Bidadi industrial areas rose faster than inflation, and adding water availability and violet-zone designation to the model put FHUI land's market value at 111.66 lakh rupees.

FX Andy Sutrisno, Bakti Setiawan · Jurnal Perencanaan Pembangunan The Indonesian Journal of Development Planning · Indonesia

This case study of Surakarta, Indonesia's sustainable agricultural land protection policy -- focusing on conservation within the urban environment -- used field observations, stakeholder interviews, and secondary data to analyze the local government's policy and how urban farmers and landowners perceive it. It found that the policy is not well understood by the farmers and landowners directly affected, that the local government itself views urban agricultural land mainly from an economic standpoint and is less supportive of conservation, and that farmers and landowners, while believing the policy is essential, reject it because designation requires relinquishing some land rights and the incentives offered are not economically sufficient to compensate them.

Dan Luo, Haifeng Zheng, Ye Chen, Philippe Deleporte, Tianpeng Xie, Siobhán Staunton, G. Wang · Soil Use and Management · China (Fujian Province)

A large-scale survey across 515 sites and 24 crop species in Fujian Province, SE China, assessed nickel (Ni) accumulation in food crops and associated dietary health risks. Crop Ni content was influenced by both soil Ni (DTPA-extractible) and plant species, though PCA did not show strong correlations between soil-to-crop transfer factors and soil properties. The study concluded that dietary intake of foods with mean Ni content could lead to health risks, particularly for children, and that sandy soils rich in organic matter with high Ni content are unsuitable for growing rice and legumes.

Eka Rastiyanto Amrullah, Ani Pullaila, Akira Ishida, Haruka Yamashita · Asian Social Science · Indonesia (Banten)

In Banten, Indonesia, the effects of the Sustainable Home-Yard Food Garden (KRPL) program on participants' household income were evaluated. The program was shown to contribute to dietary diversification through the harvest of various fresh vegetables and resulted in reduced expenditure on fresh vegetables and/or increased household income. OLS regression results indicated that participants with more pots and/or more vegetable varieties tended to enjoy gardening, were not passively motivated, grew vegetables for sale, and resided in the more developed northern part of Banten.

Faidza Rika Chandika, Subejo Subejo, Harsoyo Harsoyo · · Indonesia

This study investigated the effectiveness of television as a source of agricultural information and its influencing factors in the peri-urban agricultural area of Sleman Regency, using descriptive, proportion, and multiple linear tests. Results showed that over 50% of farmers assessed television's effectiveness as low. Television effectiveness indicators were 50.43% for cognitive effect, 44.83% for affective effect, and 49.34% for behavioral effect. The motive for watching television most affected effectiveness, with most farmers relying on group meetings and field extension rather than television for agricultural information.

Prem José Vazhacharickal · International Journal of Social Sciences · India

Street vending and urban and peri-urban agriculture (UPA) production systems, and their contribution to local services, are examined in the Mumbai Metropolitan Region (MMR), India — a region with a population of 21 million where a high proportion of urban poor and rising in-migration make it vulnerable to food crisis. Based on primary and secondary data, street vending in UPA production is argued to complement rural supply chains and reduce ecological footprints, with a recommendation that these marketing systems be better planned and incorporated into city architecture to secure local food supply and employment.

Audit Yulardi, Andar Bagus Sriwarno, Dwinita Larasati · Jurnal Sosioteknologi · Indonesia (Bandung)

In Bandung, Indonesia's "Kampung Berkebun" program, residents whose main occupation was not farming faced difficulty maintaining productive plants such as vegetables, particularly through daily watering. This study developed a time-efficient irrigation system and trialed it with residents in RT 2, RW 2, Kacapiring, Bandung. A single-point connected irrigation system reduced the time consumed by watering activities, and trial observation showed a behavior change: residents who previously watered irregularly began watering more regularly.

Heejoon Choi, Junga Lee, Heejung Sohn, Dong-Gil Cho, Youngkeun Song · Korean Journal of Environment and Ecology · South Korea

This study analyzed the landscape-ecological characteristics of green spaces in a high-density built-up area and evaluated the potential of introducing urban gardens to generate green networks in residential zones. It selected Yeoksam-Dong, Seoul — designated both a green-initiative zone and a park-service-deprived area — as the site, categorizing existing green space into street trees, private gardens, public pocket gardens, rooftop gardens, and parks, then applying FRAGSTATS landscape-index analysis and multi-buffer connectivity assessment. Results showed green area distributed in the order: street trees, private gardens, public pocket gardens, parks, rooftop gardens. Street trees' total core area (TCA, 1,618 m²) was comparable to that of parks (1,128 m²). Private gardens showed potential for green networking through gardening, given irregular patch shapes (ED=78.1 m/ha) and close average distance between patches (ENN=33.9 m). Public pocket gardens also showed potential, being evenly distributed (LPI=5.7%, SHEI=0.9) while exposed to external disturbance (TCA=66 m²). Small green networks within a 50m buffer of connected green area covered 84% of the study site, with green-network effects expected from gardening in public pocket gardens (27%) and street trees (26%).

Dwi Iriyani, Pangesti Nugrahani · Jurnal Matematika Sains Dan Teknologi · Indonesia

This descriptive quantitative study compared the nutritional values of organically and non-organically grown leaf vegetables—water spinach (kangkung), mustard greens, and spinach—cultivated in urban agriculture in Surabaya, Indonesia. Using spectrophotometric measurement (at 480, 645, and 663 nm) for total chlorophyll and carotenoid content and DCPIP titration for vitamin C, the study found water content above 80% in all samples, the highest vitamin C in non-organic mustard greens (2.45 µg/g) and the lowest in organic spinach (0.68 µg/g), the highest chlorophyll in non-organic spinach (23.81 mg/L) and the lowest in non-organic kangkung (3.29 mg/L), and the highest carotene in non-organic spinach (263.52 μmol/L) and the lowest in non-organic mustard greens (168.02 μmol/L)—concluding that no single leaf vegetable type, organic or non-organic, had the best values across all nutritional measures.