Peri-urban Agriculture Research Articles

The Prevalence and Risk Factors Associated with the Presence of Antibiotic Residues in Milk from Peri-Urban Dairy Cattle Farms in Kathmandu, Nepal

Background/Objectives: The presence of antibiotic residues (ARs) in animal products such as milk can be an important driver of antimicrobial resistance in commensal and pathogenic bacteria. Previous studies on ARs in Nepal have demonstrated the presence of ARs in milk samples but without further characterization of the samples for risk factor analysis. This study aimed to quantify the prevalence and risk factors for the presence of ARs in 140 peri-urban dairy farms in Kathmandu, Nepal, included in a cross-sectional survey in 2019 to estimate farm-level AR prevalence. Results: Our results reveal the presence of ARs of sulfamethazine (61%), sulfamethoxazole (53%), ciprofloxacin (46%), and enrofloxacin (42%). Furthermore, of those samples positive for sulfamethazine, sulfamethoxazole, and ciprofloxacin, 81%, 42%, and 42%, respectively, exceeded the maximum residue limit (MRL). While samples taken from farms where staff administered antibiotics were less likely to have single drug residues and multidrug residues (two, three, and four drugs), farms with more workers were more likely to have single residues. Moreover, samples from farms with a higher number of calves and milking cows were more likely to contain single and multiple residues exceeding the MRL, while milk from farms with higher numbers of dry cows and farmers reported by a visiting chemist were less likely to have multidrug residues exceeding the MRL. Methods: High-performance liquid chromatography was conducted on bulk milk samples from farms for an AR analysis, revealing positive results. Additionally, a structured questionnaire and direct farmer interviews were used to collect data on farm biosecurity and farming practices, animal health and hygiene, antibiotic usage (AMU), and attitudes and practices towards antibiotic stewardship. Conclusions: Ultimately, this study provides evidence on the role of modifiable ARs risk factors in the peri-urban milk industry of Kathmandu, which can serve as a foundation for developing improved antimicrobial stewardship guidelines and designing intervention measures to reduce the public health risk posed by ARs in milk sold in Kathmandu, Nepal.

A qualitative exploration of the enablers of and barriers to conformance with antibiotic withdrawal periods on smallholding, peri-urban pig farms in Kiambu County, Kenya.

Non-conformance with antibiotic withdrawal period guidelines represents a food safety concern, with potential for antibiotic toxicities and allergic reactions as well as selecting for antibiotic resistance. In the Kenyan domestic pig market, conformance with antibiotic withdrawal periods is not a requirement of government legislation and evidence suggests that antibiotic residues may frequently be above recommended limits. In this study, we sought to explore enablers of and barriers to conformance with antibiotic withdrawal periods for pig farms supplying a local independent abattoir in peri-urban Nairobi. We drew upon semi-structured interviews with farmers and government animal health professionals as well as focus groups which involved private animal health professionals. We also explored farmers' engagement with antibiotic withdrawal periods by visiting thirteen pig farms (supplying one of two local independent abattoirs) weekly for one month in order to capture instances of antibiotic use. We analysed data using reflexive thematic analysis. All farmers participating in the study demonstrated an awareness of the concept of antibiotic withdrawal periods and described intentions to conform, motivated by caring for others, wanting to prevent harm or a perception that regulation around antibiotic withdrawal periods existed for local independent abattoirs. The antibiotic use practices that we identified showed limited opportunities for non-conformance with antibiotic withdrawal periods. Farmers and veterinarians reported that instances of antibiotic use were uncommon, especially in slaughter-weight pigs, and were mainly restricted to the treatment of clinical signs under the supervision of an animal health professional. Local factors presented barriers to antibiotic withdrawal period conformance including farmers' economic constraints, lack of formal medicine recording, an absence of consistent abattoir monitoring and resource emergency, such as water scarcity on farms. This study demonstrates the importance of these contextual factors to conformance with antibiotic withdrawal periods. We highlight the need to account for farm-level influences when planning future research and interventions aimed at reducing the presence of antibiotic residues in meat from smallholding pig farms in peri-urban Nairobi.

Urban FEW Nexus Model for the Otun River Watershed

The food–energy–water (FEW) nexus has emerged as an alternative for managing resources in the food, energy, and water systems. However, there are limited case studies applying this approach in the Latin American and Caribbean region. This region stands to benefit significantly from the FEW nexus approach due to its heavy reliance on hydropower for electricity generation and unevenly distributed and poorly managed water resources. In this study, an urban FEW nexus framework was used in the Otun River Watershed (ORW) to evaluate changes in food, energy, and water demand for four scenarios. Additionally, regional climate models (RCMs) were used to forecast water availability in the ORW from 2030–2039. The results show that water demand could increase by 16% and energy demand will increase by roughly 15% for scenario 2, while water demand in scenario 3 will likely remain unchanged in relation to the current conditions (base scenario). Enhancing water resources management in the ORW will involve a variety of measures, including: implementing practices to reduce water losses in distribution systems, developing green infrastructure and decentralized wastewater systems, and embracing urban and peri-urban farming. Successful application of urban FEW nexus solutions requires involvement from stakeholders across the food, energy, and water systems.

Calculating the effect of intensive use of urban organic waste on soil concentrations of potentially toxic elements in a peri-urban agriculture context in Norway

BackgroundRecycling nutrients and organic matter available as waste in urban areas may close nutrient gaps and improve soil quality, but the concentrations of potentially toxic elements (PTEs) are commonly higher than in mineral fertilisers. How quickly may the limits for soil quality be exceeded, and for which elements, if such materials are applied intensively? For a rough answer to this question, we used soil data from ten case farms near Oslo and Bergen (Norway) to estimate how PTE concentrations increased when the demand for nitrogen (N), phosphorus (P) and potassium (K) in a theoretical carrot crop produced every year was covered by compost or digestate from source-separated food waste, or composted garden waste, compared with manure from horses and poultry which are often kept in peri-urban areas.ResultsWith the intensive fertilisation assumed here, the Norwegian soil quality limits for PTEs were reached within 20–85 years, and faster for soil with more organic matter since regulatory limits set by weight discriminate soils with low bulk density. The limits were reached first for Cu and Zn, which are both essential micronutrients for crop plants. The concentrations of macronutrients in the urban waste-based fertilisers were not well balanced. Rates covering the K demand would lead to high surpluses of P and N. In peri-urban vegetable growing, high applications of compost are not unusual, but more balanced fertilisation is required.ConclusionsThe Norwegian regulations for PTEs in organic soil amendments and agricultural soil are stricter than in the EU, and do not support recycling of organic matter and nutrients from urban waste. Many materials which can only be applied with restricted amounts to Norwegian agricultural soil, may be applied according to crop demand in the EU. Growers utilising urban waste-based fertilisers intensively should monitor the soil regularly, including PTE analyses. Soil sampling should occur on fixed sampling points to reveal changes in concentrations over time. Norwegian authorities should consider a revision of the organic fertiliser regulation to support recycling of valuable organic materials. There is a need for more data on the PTE concentrations in agricultural soil and organic fertiliser materials.

A growing concern: investigating sustainable water quality and urban food production in Freetown, Sierra Leone

ABSTRACT Clean water and food security are central to sustainable urban living. Yet, in rapidly expanding African cities, they remain unobtainable for many and a barrier to the health and wellbeing of millions of people. In Freetown, Sierra Leone, a city that has experienced rapid in-migration in recent decades, urban food security has become a major concern. One critical response has been the proliferation of urban and peri-urban agriculture (UPA) to support food security and income generation for the poor. However, UPA sites are often exposed to a range of pollutants. This paper examines the environmental health status of three different UPA sites in Freetown. Qualitative and quantitative data show heavy metal concentrations that significantly exceed regulatory limits in crop (sweet potato) leaves and arable soil. Soaring readings of faecal coliform bacteria were observed in water used for irrigation, corroborating health-related findings which demonstrate a direct relationship between water supply, handwashing and diarrhoea. Elevated nutrient concentrations were also observed in surface water during the rainy season. Ultimately, crops were revealed to be hyperaccumulators for environmental contaminants, highlighting both the challenges and potential for nature-based solutions to strengthen food security and public health at UPA sites in Freetown and other growing cities.

Assessment of public knowledge, perception and willingness towards treated hospital wastewater reuse in peri-urban agriculture in Ibadan, Nigeria

Assessment of public knowledge, perception and willingness towards treated hospital wastewater reuse in peri-urban agriculture in Ibadan, Nigeria

Urban Agriculture and Food Security in Development Planning

With the world population anticipated to reach over nine billion in 2050, and the majority of whom will live in cities, feeding a predominantly urban population will pose additional challenges to a predominantly rural-based agrifood system. Further, with the focus of economic activity being centered in cities, a development question is whether agriculture in cities should be an integral part of national planning. This is particularly when food insecurity is expected to challenge the poor in cities much more than in the countryside. Urban and peri-urban agriculture has been practiced in many parts of the world through activities ranging from community gardens to commercial farms of varying sizes. A major change, accelerated by supply chain disruptions and the COVID-19 pandemic in the early 2020s, has been the rapid development of technologies (digital, physical, biotechnological) that increases food production capabilities in urban areas and provide economic opportunity for entrepreneurship. Additionally, sizable investments from private equity have seen sophisticated food production facilities, such as indoor vertical vegetable and fish farms and precision fermentation factories, produce novel food such as alternative proteins in city spaces. Apart from the economic and food security benefits arising from urban agriculture, environmental and social benefits have also been demonstrated in cities that have adopted a clear mandate to become “green” and reduce their carbon footprints. This paper provides a background on urban farming, its justification as a worthwhile activity, and the rationale for explicitly including urban agriculture in national planning.

Effect of the combination of two types of fish feed with nutritional quality on the performance of two species of fish raised on rural and peri-urban farms in Cote D'ivoire

For 160 days, juvenile Oreochromis niloticus and Heterobranchus longifilis were in ponds on a farm in San Perdo located in the southwest of Côte d’Ivoire.The juveniles grouped in four lot per species and in triplicate were fed in pairs of industrial feed and feed produced on the farm and an agri-feed by-product from four feeding techniques (Batch 1: juveniles fed with an industrial lime in the pre-growing phase followed by an agricultural by-product in the growing phase. Batch 2: Juveniles fed with an industrial feed then a feed formulated with an agricultural product during the growing phase ; Batch 3: juveniles fed with an agricultural by-product in the pre-growing phase followed by an industrial feed in the growing phase. Batch 4: Juveniles fed with a formulated feed in the pre-growing phase then with an industrial feed in the growing phase). At the end of the experiment, the best zootechnical parameters were obtained whatever the species by the juveniles fed in the pre-grossing phase with a produced feed followed by industrial feed in the production growing phase.

Indicators of Cultural Ecosystem Services for Peri-Urban Agricultural and Natural Areas at an Intermediate Scale: A Case Study of Arequipa, Peru

The evaluation of management in peri-urban agricultural and natural areas (PANAs) constitutes a complex topic, particularly when considering its scale in cities where landscape planning is a priority. Therefore, indicators are required to assess the non-material well-being, biodiversity, and quality of life of society, which are criteria of cultural ecosystem services (CESs). This research develops identification and subclassification CESs and tangible and intangible indicators that facilitate the management of the PANA landscape, using the city of Arequipa as a case study—a dynamic cultural city with a declared cultural heritage, in turn located in an artificial oasis in the Atacama Desert. Therefore, the results will enable the selection of indicators that are practically applicable to planning instruments, serving as support systems for decision-making regarding interventions in PANAs. The methodology began with a systematic and meta-analytic (PRISMA) review, identifying 25 articles containing 230 indicators across 19 subclassifications. Using the Multiscale Indicators Framework (MSIF), the literature was integrated with a participatory workshop to validate these findings. The level of impact was assessed for 115 indicators across 13 subclassifications, applying criteria such as diversity, sustainable management, quality of life, and scalability—factors necessary to comply with urban sustainability policies.

Success of Artificial Insemination in Rural Area Cows

Biotechnologies of reproduction like artificial insemination were identified as a mean to intensify the local production. Therefore, some factors are still responsible to the failure of their applications in rural area. This survey was conducted from April to June 2023, to evaluate the effects of age, body weight, body condition score (BCS), calving rank, postpartum to artificial insemination interval and feed complementation on the success rate of artificial insemination in females Goudali. Thus, activities took place at two peri-urban livestock farms in the town of Ngaoundéré, in the Adamaoua region of Cameroon where 34 cows were concerned. The selected cows have an average of 8.21±2.41 years old, a body weight of 343±52.28 kg, a body condition score of 3.23±0.55, a calving rank of 2.21±1.22 and a postpartum to insemination interval of 4.39±1.40 months. The induction and synchronization of estrus were carried out based on the PRID-PGF2α-PMSG protocol which allowed to obtain a synchronization rate of 97.06% and the insemination were done 56-57 hours after the previous operation, with an imported semen of Brahman bull. During rectal palpation and early pregnancy diagnosis based on progesterone level measurement, the result shown that, 20 cows out of 33 inseminated were pregnant. The success rate of artificial insemination recorded was 60.6%. Amongst all the studied factors, analysis shown no significant (P> 0.05) effect on the success rate after artificial insemination. Thus, recommendations were made to popularize the use of artificial insemination and early pregnancy diagnosis test as a mean to improve reproductive performances of local farms. However, studies must be done to evaluate the cost of their applications in rural areas.

Marginalised agrarian traditions as a tool for climate justice

Many marginalised communities have long-standing food-growing traditions, yet the climate crisis imperils global food security and disproportionately impacts marginalised communities. Increasingly, researchers posit that networks of decentralised peri-urban agriculture can strengthen food security. In this qualitative study, I ask: what can we learn from marginalised agrarian traditions that might be useful to those marginalised communities in collectively surviving climate change? To answer that question, I conducted in-depth, semi-structured interviews with 23 marginalised food growers and community leaders in the deindustrialised city of Ypsilanti, Michigan, USA. I find that growing food helps to build resilience to food insecurity and climate change but is difficult because of land injustice. Policy and practice implications include the need for the following: (1) housing justice; (2) proactive planning in areas that are expected to serve as climate refuges; and (3) reparations and land rematriation to address the disparate impacts of climate disaster in marginalised communities.

Fate of fluoroquinolones associated with antimicrobial resistance in circular periurban agriculture

Animal antibiotic use contributes to antimicrobial resistance (AMR) in humans. While animal manure benefits soil fertility, it also acts as hotspot for antibiotic residues, antibiotic-resistant bacteria, and their genes. Amending soils with poultry litter is recognized as “magic” among horticulture farmers and it remains a common practice globally. However, this poses a risk especially in countries where prophylactic use of antibiotics is allowed. In Argentina, fluoroquinolones are used in this way besides being listed as essential medicines and classified as “watch” by the World Health Organization. Antibiotic selective pressure can favour AMR in the environment but the fate of antibiotic residues and AMR dissemination from these practices remains poorly understood. Our research addresses this gap with a biological model tracing fluoroquinolones from poultry to soil to lettuce and tracking anthropogenic AMR with the proposed biomarker genes sul1 and intI1. Fresh poultry litter was stored for six months before application in a horticulture field experiment. The experiment included control and manured plots where lettuce was cultivated till harvest. Enrofloxacin concentration was 7.3 μg/kg in fresh poultry litter, while its metabolite ciprofloxacin was 39.22 μg/kg after storage. Although no fluoroquinolones were detected in soils, lettuce from manured plots contained enrofloxacin and ciprofloxacin at 14.97 and 9.77 μg/kg, respectively, providing evidence of fluoroquinolone bioaccumulation in plants. Abundance of sul1 and intI1 in poultry litter was not affected by storage. Manured soils showed better soil quality than controls, but sul1 gene abundance was 1.6 times higher, reaching 7.61 Log sul1/g soil. A less sensitive, but significant effect was registered for intI1. These findings show that static storage is insufficient to stop the transmission of antibiotics and AMR biomarkers from poultry to horticulture. Amending soil with industrial poultry litter contributes to pollution with these emergent contaminants and risks human antibiotic exposure through fresh vegetables.

Land Market and the “Sendoff” of Peri-Urban Agriculture in Tanzania: An Evolutionary Analysis of Practices and Actors

Land Market and the “Sendoff” of Peri-Urban Agriculture in Tanzania: An Evolutionary Analysis of Practices and Actors

Newly adopted dromedary husbandry systems and breeding practices in the Algerian northern Sahara

Background: Traditional nomadic livestock farmers have adopted new lifestyles, management methods and husbandry practices to improve their livestock income and enhance the value of camel products, whose benefits are increasingly being recognized worldwide. Driven by a rising demand for camel products among urban consumers, these changes include a strong tendency for nomadic communities to settle near urban centers, the temporary stationing of part of the camel herd in urban and peri-urban areas, and the intensification of production in these areas. Aims: This paper aims to present the newly adopted dromedary husbandry practices, and discuss the products and services provided by dromedaries. Methods: Between September 2020 and March 2021, formal and informal interviews were carried out in three locations in the Algerian northern Sahara with 11 camel breeders, whoheld a total of 537 dromedaries (average 48.8 ± 4.36). Results: The study identified three types of dromedary farming systems: 70% of the farms were peri-urban,semi-intensive dairy farms established to meet the rising demand for camel milk, 23% were settled, intensive, peri-urban feedlot farms producing all categories of fattened dromedaries, especially young males, and 7% were settled, urban, and peri-urban dromedary racing farms dedicated to breeding dromedaries for racing and riding during local festivals, activities anchored in the traditions of the native population. The surveyed farms primarily generated income from the sale of milk and live animals, with manure and wool also contributing to their earnings. The food resources used for dromedaries were natural pastures, crop residues and harvest residues. Conclusion: The intensification of dromedary breeding appears essential to ensure the sustainability of this animal resource as it can improve reproductive potential, milk production, and the availability of young calves for fattening farms. The changes in practices identified in this study are enabling breeders, who are managing their livestock in guarded and semi guarded camel production systems, to increase their income.

Evaluation of brinjal and tomato scions for enhancing yield and quality attributes in grafted brimato plants

To meet the growing demand for fresh produce in cities, promoting peri-urban and urban farming is essential to reduce reliance on rural areas for vegetables. One innovative approach developed at ICAR-IIVR, Varanasi (2019-2022), is the dual grafting of brinjal and tomato on a single brinjal plant, termed 'Brimato' (Brinjal + Tomato). Using the vigorous, waterlogging and salinity-tolerant brinjal rootstock IC 111056, four brinjal cultivars (Kashi Sandesh, Kashi Uttam, Kashi Manohar, Kashi Vijay) and three tomato cultivars (Kashi Aman, Kashi Chayan, Vani) were selected as scions. Over three years, experiments showed that scion cultivars significantly impacted Brimato productivity. Kashi Manohar combined with Kashi Aman or Kashi Chayan yielded the highest brinjal fruit numbers, while Kashi Aman combined with hybrid brinjal Kashi Sandesh resulted in the highest tomato fruit numbers. The highest fruit yields were observed with the Kashi Sandesh + Kashi Chayan combination, yielding 2.58 kg/plant. The Kashi Aman + Kashi Sandesh combination produced a cumulative yield of 5.98 kg/plant. Physiological traits like photosynthetic rate and chlorophyll fluorescence yield varied significantly among scion cultivars, with Kashi Manohar and Kashi Aman scions exhibiting the highest photosynthetic rates. Grafted Brimato plants showed enhanced fruit quality, particularly in vitamin C and β-carotene content. These findings highlight the potential of Brimato plants for urban agriculture, offering a viable solution for sustainable fresh produce supply.

Assessing the Public Peri-Urban Agricultural Park as a Tool for the Sustainable Planning of Peri-Urban Areas: The Case Study of Prato

Assessing the Public Peri-Urban Agricultural Park as a Tool for the Sustainable Planning of Peri-Urban Areas: The Case Study of Prato

Community-Based Resilience Analysis (CoBRA) to Hazard Disruption: Case Study of a Peri-Urban Agricultural Community in Thailand

The expansion of cities and land use changes have led to the emergence of peri-urban areas representing a transition between fully urbanized and agricultural regions in Southeast Asia. Peri-urban communities provide essential ecosystem services but are vulnerable to climate-related disruptions and socioeconomic challenges. Utilizing their unique characteristics, peri-urban communities can contribute to sustainable development and resilience. This study assesses the potential of peri-urban areas to meet future challenges for sustainable development in a changing world, focusing on the local pandan farming community of Pathum Thani, approximately 53 km north of Bangkok, using the Community-Based Resilience Analysis (CoBRA) approach. A formally established group of peri-urban farming households identified COVID-19, water quality, and solid waste as their primary disruptive challenges. The community identified economic stability and resources (land ownership, financial security, and government support), community and social support (collaborative community, and healthcare facilities), an environmental dimension (sufficient food and clean water), and an information dimension (news and knowledge update) as key community resilience characteristics, which highlight their comprehensive approach to hazard resilience. The study concludes that the community was moderately resilient to hazards and COVID-19 was the primary disrupting event over the past 10 years. To address future challenges in peri-urban agriculture, it is suggested to focus on enhancing economic diversification, strengthening social networks and support systems, implementing sustainable land management practices, and promoting access to timely and accurate information. Additionally, investing in infrastructure for water management and waste recycling, supporting small-scale farming initiatives, and fostering collaboration between farmers and local authorities can contribute to building resilience in peri-urban agricultural communities.

The food-water-climate nexus of green infrastructure: Examining ecosystem services trade-offs of peri-urban agriculture

Emission reduction, heat mitigation, and improved access to water and food provision are increasingly critical challenges for urban areas in the context of global climate change adaptation and mitigation. The revival of local agricultural production is often lauded as a potential nature-based solution. However, an expansion of peri-urban agriculture (peri-UA) may entail significant ecosystem trade-offs. This study explores the impacts on the food-water-climate nexus of different scenarios of peri-urban agricultural expansion in a semi-arid, Mediterranean climate, addressing local food provision, freshwater use, local temperature regulation, global climate change mitigation, and the trade-offs thereof. We estimate food provision and irrigation water requirements based on a georeferenced urban metabolism approach along with atmospheric and biosphere models to examine four land-use scenarios in the Metropolitan Area of Barcelona.Our study reveals that a 31 % (+17.27 km2) and 115 % (+64.25 km2) increase in the current peri-UA in the AMB, results in an increase in local food production of 24 % (+16,503 tons year−1) and 86 % (+58,940 tons year−1), and irrigation water requirements by 10.0 % (+3.2 hm3) and 43.5 % (+14.1 hm3), respectively. The expansion of irrigated peri-UA potentially reduces near-surface temperatures by 0.7 °C, albeit temperature reductions in the densest urban areas are minimal. Since the additional peri-UA is achieved by replacing natural non-forested and forest areas, the simulations predict reductions in the net ecosystem productivity of up to 18.5 % and total carbon stocks by 3.3 %. This integrated approach combining urban metabolism and atmospheric modelling to determine the trade-offs appears to be a promising tool for informing land-use decision-making in the context of urban climate adaptation and mitigation.

Developing a new methodology for determining typologies of peri-urban agriculture: A case study of the Jakarta Bandung Mega Urban Region Indonesia

Peri-urban agriculture (PUA) has different ecological, socio-institutional, and economic conditions. The dynamic characteristics of PUA are driven by the location in a rural-to-urban transitional zone. In this context, a new approach should be developed for identifying PUA typologies to facilitate more effective and relatively quick policy management and planning. Therefore, this study aims to develop new categories and a set of methodologies to determine PUA typologies using statistical approaches such as variable simplification (Principal Component Analysis), cluster analysis (K-means), and village-based spatial characterization mapping. A structured selection was conducted to determine the case studies, and two adjacent suburban districts in the Jakarta Bandung Mega Urban Region (JBMUR) corridor were obtained. The results show that there is a new insight into the use of spatial approaches and the relationship between empirical conditions at the local level and policies related to PUA. The developed typology approach describes significant variations in agricultural conditions based on the intensity. Strategies and recommendations for PUA development based on typology are also proposed.

Peri-urban agriculture and household food and nutrition security around Eldoret, Kenya

Rapid urbanisation in low- and middle-income countries, which has encroached on agricultural lands but has not been consistently accompanied by corresponding improvements in water and sanitation services, has raised questions about its impact on the food and nutrition security of households living in transitional, peri-urban areas. Through an analysis of survey data collected from 518 households living around the town of Eldoret, Kenya, we investigate the existing links between peri-urban households’ engagement in agriculture, their dietary behaviour, and their children’s nutrition outcomes. We find that peri-urban households engaged in agriculture, particularly in crop growing and in the sales of their agricultural produce, have more diverse and nutritious diets than agriculturally non-engaged households, all other things being equal. However, a significant improvement in children’s health outcomes is observed in these households only when coupled with improved water, sanitation, and hygiene conditions.