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Transformative agroecology challenges industrialized food and farming systems, proposing an alternative vision in which farms are designed around ecological symbioses and embedded within socially just food networks. However, at a policy level, alternative conceptualizations of agroecology have emerged that emphasize on-farm efficiency gains but lack broader objectives of agroecosystem and food system transformation. This phenomenological inquiry explores the agroecological narrative among Scottish farmers and considers its impacts on agroecosystem and food system change. Interviews were conducted across 15 farms in Scotland (20 participants) following the trans positional cognition approach (TPCA). Actualizations of agroecology were found to be value-driven approaches to developing individualized, lower-input farming systems. All farms were attempting to influence agroecosystem change through the application of ecological principles, and most (11/15) were contributing to food system change directly through involvement in alternative food networks. Smaller-scale farmers appear to deliver the most authentic actualizations of transformative agroecology but emphasized more strongly their financial challenges. A key recommendation for policymakers is to strengthen the support mechanisms available for small-scale ecological agriculture. [ABSTRACT FROM AUTHOR]

In this paper we assess the relationship between how women access the land they farm, and their farming identities, roles, and future succession plans. Utilizing a Bourdieusian approach, we conceptualize inheritance of farmland as a long‐term process of symbolic and economic investment. We conducted a cohort analysis of women living or working on farms in Scotland, UK who (a) were or were not raised on farms; and (b) bought into or inherited agricultural land (directly or through their spouses). Data comprised on‐line survey responses, qualitative interviews and focus groups. Analysis demonstrated that women who were raised on farms and either inherited farms or established new farms, were more likely to identify themselves as farmers, engage in machinery work and identify female successors. Women who accessed farmland through marriage tended to engage in more home‐making tasks, to identify themselves as farmers' wives, and to occupy larger farms. These largest, potentially most viable farms thus continue to be inherited by men. However, when women inherit farms, a step change occurs, where daughters are much more likely to be identified as future successors. Enabling women raised on farms to inherit and/or establish new farms is thus critical to altering patriarchal succession cycles. [ABSTRACT FROM AUTHOR]

In this paper we assess the relationship between how women access the land they farm, and their farming identities, roles, and future succession plans. Utilizing a Bourdieusian approach, we conceptualize inheritance of farmland as a long‐term process of symbolic and economic investment. We conducted a cohort analysis of women living or working on farms in Scotland, UK who (a) were or were not raised on farms; and (b) bought into or inherited agricultural land (directly or through their spouses). Data comprised on‐line survey responses, qualitative interviews and focus groups. Analysis demonstrated that women who were raised on farms and either inherited farms or established new farms, were more likely to identify themselves as farmers, engage in machinery work and identify female successors. Women who accessed farmland through marriage tended to engage in more home‐making tasks, to identify themselves as farmers' wives, and to occupy larger farms. These largest, potentially most viable farms thus continue to be inherited by men. However, when women inherit farms, a step change occurs, where daughters are much more likely to be identified as future successors. Enabling women raised on farms to inherit and/or establish new farms is thus critical to altering patriarchal succession cycles. [ABSTRACT FROM AUTHOR]

This article presents research carried out in Scotland that explored the role of advisors in supporting the adoption of variable rate precision farming (VRPF). Examining data from in‐depth interviews with farmers and advisors in Scotland through a responsible research and innovation lens with a focus on inclusion, we consider the implications of a changing advisory landscape for responsible digital innovation. Our findings show that the main advisors supporting the adoption of VRPF are based in commercial companies, which mostly target large farms. We explore concerns over bias in the advisory process on the one hand and long‐running trusted relationships between commercial advisors and farmers on the other. The research shows that the current system excludes certain stakeholders from the process. Recommendations include policy and programmes to support collaboration between a broader range of stakeholders, including advisory suppliers and farmers in the innovation process. This can promote more inclusive development of VRPF technologies, which represent the interests of more diverse farm types and avoid exacerbating agricultural digital divides. [ABSTRACT FROM AUTHOR]

This paper proposes a radial-grouping-based planning method for the electrical collector systems (ECSs) to design the topology and select the cross-sections of ECS submarine cables in tidal current generation farms (TCGFs) while minimizing investment and operation costs. First, an angle-based radial-grouping method is proposed to group the tidal current turbines (TCTs) in a TCGF, considering their capacity limitations while avoiding the trans -region crossing of submarine cables. Second, an optimal planning model is presented to determine the connection scheme for the TCTs within the same group in a TCGF. The investment and trenching costs of submarine cables and ECS power losses are modeled to minimize the comprehensive annual equivalent cost of ECS, while satisfying the submarine cables' voltage drop and capacity limitation constraints. Third, an efficient solution method is developed by modifying a genetic algorithm with the Prufer number, which retains the ECS radial topology and connectivity with high computational efficiency. Finally, two TCGFs with distinct characteristics in the North Orkney Islands, Scotland, and their measured tidal current data are used to demonstrate the effectiveness, correctness and adaptability of the proposed method. • A radial-grouping method is developed to avoid the crossings of submarine cables. • ECS topology and submarine cable types are simultaneously designed. • Investment and operational costs of ECS are optimized by the planning model. • GA is modified by Prufer number to effectively and efficiently solve the model. [ABSTRACT FROM AUTHOR]

Hill sheep farming is an important component of Scottish agriculture and comprises a significant land use in much of the Highlands and Islands. However it faces significant challenges due to the natural constraints of the landscape. Hill sheep farming uses hardy traditional breeds, such as the Scottish blackface and North Country Cheviot to graze extensive areas, where the sheep are not housed and tend to lamb on the open hill. Flocks are gathered several times a year for stock checks, husbandry, and health treatments. Between these handling events, stock will disappear and be unaccounted for. These unexplained losses are known as blackloss in the Highlands and Islands. Previously reported figures for annual lamb blackloss give an average of 18.6%. These losses are in addition to the known losses of lambs and represent a significant welfare and sustainability issue. High parasite burdens, predation, a photosensitisation disease known as plochteach or yellowses, and poor nutrition are often given as presumed reasons for blackloss. A questionnaire was developed to assess the experiences, impacts and understanding flock managers have of blackloss. Typology analysis using partitioning around medoids was used to cluster respondents into three distinct groups: 1- very large extensive farms and Sheep Stock Clubs, 2- medium sized farms, and 3- small-scale crofts. The responses of these groups were subsequently analysed to see if their experiences and perceptions of blackloss differed with relation to lamb health challenges and predation impacts. The groups reported similar health challenges, apart from Group 1 which had a significantly higher plochteach challenge. In terms of predators, Group 1 also perceived white-tailed eagles (Haliaeetus albicilla) as a much higher threat to their lambs than the other groups. It was observed that many of the respondents believed blackloss is inevitable and that predators pose a large threat to lambs. However, most agreed that reducing these losses is important and that understanding the causes would enable them to do so., Competing Interests: Co-author AK is employed by the funding organization (NatureScot). This does not alter our adherence to PLOS ONE policies on sharing data and materials. All other authors declare that they have no competing interests., (Copyright: © 2024 McAuliffe et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)

In this paper we develop a typology of 'non-commercial' approaches to farming, based on a survey of a representative sample of farmers in Scotland, United Kingdom. In total, 395 (16.6% of the sample) farmers indicated that they do not seek to make a profit on their farms. We estimate that these non-commercial approaches to farming are utilised on at least 13% of agricultural land in Scotland. As such, non-commercial farming (NCF) is not a marginal practice, nor are NCF limited to small-scale 'hobby' farms: NCF exist across the scale of agricultural holding sizes and are operated by a wide range of socio-demographic cohorts. We identify 6 types of NCF: agricultural residences, specialist smallholdings, horsiculture holdings, mixed smallholdings, amenity mixed farms, and large farms or estates. These types were differentiated primarily by the scale of farm size, presence of diversification activities and types of animal present. The analysis demonstrates a number of emergent patterns of land management: de facto land abandonment, transition towards 'horsiculture', and management differences between retiring and new entrant NCF. We argue that the types identified reflect a number of intersecting issues in contemporary agrarian transitions, particularly the aging farmer population; generational renewal; and gendered implications of agricultural restructuring. [ABSTRACT FROM AUTHOR]

Context: We address understanding of whole-system and landscape-based approaches to the ecosystem services framework by considering the supply of provisioning services and the dynamics of agricultural land use in Scotland between 1940 and 2016. Objectives: To characterise and understand the dynamics of change in provisioning services from agriculture in Scotland over the period 1940–2016. To identify ways in which funds of capitals and flows of inputs and output ecosystem goods are linked to land management practices and policies at a national scale. Methods: Data describing agricultural land use, production, financial and energy inputs and outputs, and drivers of change in land use in Scotland are analysed with an accounting framework that links funds of natural, human, physical and financial capital, with flows of goods and services. Flow–fund ratios are used as benchmarks of system performance and dynamics. Results: Scotland's agriculture has modernised since 1940 and become more efficient in conversion of resources, with a consequent increase in delivery of provisioning goods and services. Although the energy ratio, and flow of goods per unit hectare and per unit labour have increased, the inputs necessary to maintain those flows of ecosystem goods are also increasing, even as their relative economic costs decrease. Increases in use of fertiliser suggests that production from the soil, as a natural capital fund, is not being conserved without a large, and increasing, input. Analysis of the complexity of the coupled agricultural land system also suggests that land management rather than biodiversity is a necessary subject for evaluation of provisioning services from agriculture. Understanding of ecosystem services based on accounts that integrate inputs, outputs and flows from funds of natural, human, social, financial and physical capitals, provides a process-based foundation for improved understanding of ecosystem services and human–environmental relationships. Conclusions: Adopting an accounting approach for understanding the role of agricultural land use for supply of provisioning services, and particularly examining a long time-series of accounts, enables understanding of land changes and underlying drivers, as well as the contribution of cultural and other aspects of human systems coupled with environment systems. Accounting for ecosystem services using costs as well as benefits, and use of metrics beyond financial benefit, supports debate and evaluation of trade-offs between services and has direct relevance for decision- and policy-making. [ABSTRACT FROM AUTHOR]

The application of nitrogenous fertilisers to agricultural soils is a major source of anthropogenic N2O emissions. Reducing the nitrogen (N) footprint of agriculture is a global challenge that depends, among other things, on our ability to quantify the N2O emission intensity of the world's most widespread and productive agricultural systems. In this context, biogeochemistry (BGC) models are widely used to estimate soil N2O emissions in agroecosystems. The choice of spatial scale is crucial because larger-scale studies are limited by low input data precision, while smaller-scale studies lack wider relevance. The robustness of large-scale model predictions depends on preliminary and data-demanding model calibration/validation, while relevant studies often omit the performance of output uncertainty analysis and underreport model outputs that would allow a critical assessment of results. This study takes a novel approach to these aspects. The study focuses on arable eastern Scotland – a data-rich region typical of northwest Europe in terms of edaphoclimatic conditions, cropping patterns and productivity levels. We used a calibrated and locally validated BGC model to simulate direct soil N2O emissions along with NO3 leaching and crop N uptake in fields of barley, wheat and oilseed rape. We found that 0.59 % (±0.36) of the applied N is emitted as N2O while 37 % (±6) is taken up by crops and 14 % (±7) is leached as NO3. We show that crop type is a key determinant of N2O emission factors (EFs) with cereals having a low (mean EF<0.6 %), and oilseed rape a high (mean EF=2.48 %), N2O emission intensity. Fertiliser addition was the most important N2O emissions driver suggesting that appropriate actions can reduce crop N2O intensity. Finally, we estimated a 74 % relative uncertainty around N2O predictions attributable to soil data variability. However, we argue that higher-resolution soil data alone might not suffice to reduce this uncertainty. [ABSTRACT FROM AUTHOR]

For the last two decades, the human infection frequency of Escherichia coli O157 (O157) in Scotland has been 2.5-fold higher than in England and Wales. Results from national cattle surveys conducted in Scotland and England and Wales in 2014/2015 were combined with data on reported human clinical cases from the same time frame to determine if strain differences in national populations of O157 in cattle could be associated with higher human infection rates in Scotland. Shiga toxin subtype (Stx) and phage type (PT) were examined within and between host (cattle vs human) and nation (Scotland vs England and Wales). For a subset of the strains, whole genome sequencing (WGS) provided further insights into geographical and host association. All three major O157 lineages (I, II, I/II) and most sub-lineages (Ia, Ib, Ic, IIa, IIb, IIc) were represented in cattle and humans in both nations. While the relative contribution of different reservoir hosts to human infection is unknown, WGS analysis indicated that the majority of O157 diversity in human cases was captured by isolates from cattle. Despite comparable cattle O157 prevalence between nations, strain types were localized. PT21/28 (sub-lineage Ic, Stx2a+) was significantly more prevalent in Scottish cattle [odds ratio (OR) 8.7 (2.3-33.7; P <0.001] and humans [OR 2.2 (1.5-3.2); P <0.001]. In England and Wales, cattle had a significantly higher association with sub-lineage IIa strains [PT54, Stx2c; OR 5.6 (1.27-33.3); P =0.011] while humans were significantly more closely associated with sub-lineage IIb [PT8, Stx1 and Stx2c; OR 29 (4.9-1161); P <0.001]. Therefore, cattle farms in Scotland were more likely to harbour Stx2a+O157 strains compared to farms in E and W ( P <0.001). There was evidence of limited cattle strain migration between nations and clinical isolates from one nation were more similar to cattle isolates from the same nation, with sub-lineage Ic (mainly PT21/28) exhibiting clear national association and evidence of local transmission in Scotland. While we propose the higher rate of O157 clinical cases in Scotland, compared to England and Wales, is a consequence of the nationally higher level of Stx2a+O157 strains in Scottish cattle, we discuss the multiple additional factors that may also contribute to the different infection rates between these nations.

Agricultural land covers a significant portion of the earths land surface. Although the predominant function of agricultural land is food production, environmental public goods, such as biodiversity or soil maintenance, are also essential for long-term sustainability. In arable farms the type of cropping system used has a major impact on delivery of these environmental goods. Low input, integrated and regenerative cropping systems aim to improve environmental outcomes of arable farming, with the goal of reducing external inputs by supporting internal regulation of system processes. However, the production of environmental goods does not have an immediate market value to the farmer, and often comes at a cost, particularly in the early stages of transition to a more sustainable system. We estimate the on-farm costs and benefits of an integrated cropping system during the first six years of transition from intensive conventional management at the Centre for Sustainable Cropping in north east Scotland. Although integrated cropping had better environmental outcomes, all crops had higher financial margins in the conventional system compared to the integrated system, which suffered a loss of over £500 per ha per year across the full rotation. This indicates that financial incentives are likely to be important to allow farmers to transition towards a more environmentally friendly cropping system. • Cropping systems can impact the land's ability to produce environmental goods. • Integrated cropping systems aim to improve environmental outcomes of arable farming. • We estimate the on-farm costs and benefits of an integrated cropping system. • Integrated cropping had better environmental outcomes, but lower margins. • Financial incentives are therefore needed for environmentally friendly farming. [ABSTRACT FROM AUTHOR]

The paper explores the distributional consequences of farm income mobility in Scotland, focusing on the extent to which farm income inequality is a chronic as opposed to a temporary phenomenon and on the nature of the dynamic processes driving changes in farm income inequality over time. The empirical results reveal that the majority of farm income inequality was long-run or structural in nature, reflecting differences in both farm business size and farm-specific factors such as land quality, managerial ability and business structures. Evidence of absolute convergence in farm incomes is explained by short-run adjustments towards equilibrium or target incomes conditional upon prices, technology and farm business size, with farm business growth conditional upon survival found to have had no significant redistributive effect. [ABSTRACT FROM AUTHOR]

Background: Good stewardship of antibiotics can reduce the development and impact of antimicrobial resistance (AMR); therefore, understanding farmers' antibiotic use is of interest to stakeholders. To date, few qualitative studies have looked at farmers' antibiotic use on dairy farms in the UK., Methods: Semi-structured interviews were used to explore 15 Scottish dairy farmers' antibiotic use behaviours and the factors influencing their antibiotic use on farms., Results: Using an inductive process, the results from the interviews were analysed, and four key themes were extracted: use of antibiotics, awareness of AMR, determinants of antibiotic use and future aspirations., Limitations: Some of the farmers interviewed were wary about discussing their antibiotic use, which could mean that some contentious issues were not discussed. The farmers also all belonged to a single milk-buying group, which may limit the generalisability of the findings., Conclusions: The quantities of antibiotics used were felt to be driven by the disease prevalence on farms, cows being indoors more, increasing herd sizes resulting in increased stocking densities, retention of poorer cows and substandard housing. Farmer knowledge of antibiotics varied, and not all farmers interviewed were aware of AMR. The farm veterinarian, the press and peers were found to be the main sources of antibiotic information., (© 2023 The Authors. Veterinary Record published by John Wiley & Sons Ltd on behalf of British Veterinary Association.)

Antimicrobial resistance (AMR) poses a major threat to global health. Understanding how antimicrobials are used on dairy farms and stakeholder beliefs relating to their use is essential to ensure responsible antimicrobial usage (AMU) to tackle the emergence of AMR. This study explored Scottish dairy farmers' knowledge about the meaning of AMR and antimicrobial activity, behaviour and practices related to farm AMU and attitudes towards AMR mitigation. An online survey was designed based on the findings of two focus groups and was completed by 61 respondents (7.3% of the total population of Scottish dairy farmers). Knowledge of antimicrobials and AMR was variable, and almost half of the participants believed that antimicrobials could have anti-inflammatory or analgesic activity. Veterinarians' opinions and advice about AMU were ranked significantly more important than other social referents or advisors. The majority of farmers (90%) reported having implemented practices to reduce reliance on antimicrobials (e.g., selective dry cow therapy, AMU treatment protocols) and having reduced farm AMU over recent years. Feeding waste milk to calves is still widespread, being reported by up to 30% of respondents. The main factors described to hinder responsible farm AMU were limited facilities (e.g., lack of isolation pens for sick animals) and knowledge of appropriate AMU recommendations, followed by time and financial constraints. Most farmers (89%) agreed that it is important to reduce AMU on dairy farms, but fewer (52%) acknowledged that AMU on UK dairy farms is currently too high, suggesting a mismatch between their intention to reduce antimicrobials and AMU behaviour. These results indicate that dairy farmers are aware of AMR, and their self-reported farm AMU has been reduced. However, some do not clearly comprehend the activity of antimicrobials and their correct usage. More work is needed to improve dairy farmers' knowledge of appropriate AMU and intentions to combat AMR. Farmers would benefit from more regular AMU discussions and advice from herd veterinarians, as they were described as highly trusted information resources. Training on how to reduce AMU should involve all farm staff administering antimicrobials and should be tailored to farm-specific barriers, such as limited facilities and workforce shortages., (© 2023. The Author(s).)

We estimate the impact of diversification on the performance of farm businesses using measures of economic viability among farms in Scotland and Sweden. We derive indicators of viability using national level accounting surveys for the period 2000–2012 and account for short-term and long-term effects within our estimates of viability. A higher proportion of Scottish farms emerge as being more short-term and long-term viable than Swedish farms. This could, we propose, be due to emphasis on enhancing farm viability within Scottish planning for rural development, compared to Sweden which emphasized productivity and environmental enhancement. Moreover, for both countries the trend in viability is relatively stable until 2007, when both panels begin to display the impact of policy and market change. Findings based on a multinomial logistic regression indicate that farms which run additional ventures outside traditional agriculture, and are diversified in the sense that they obtain revenue from two or more agricultural enterprises, are more viable compared to specialized agricultural units. Other factors which affect viability were found to be structural, biophysical and institutional, specifically the reform of the Common Agricultural Policy (CAP) in 2003. However the significance and magnitude of these effects differ across the two countries. Consequently, these results seem to imply the importance of emphasizing non-specialized agricultural activities within rural development policy and, moreover, informs the rationale behind proposed redistributions of CAP payments. [ABSTRACT FROM AUTHOR]

The growing demand for a wide range of private and public goods and services from a finite land resource is increasingly challenging for planners at local, regional, national and international scales. The Scottish Government's development of a Land Use Strategy has given salience to resolving conflicts and enhancing synergies in land use. In Scotland, the poorest quality farmland is often designated for nature and landscape conservation and the highest quality farmland often protected for food production. This means that many of the competitive pressures on land are experienced in what we term the 'squeezed middle'. The paper identifies the multiple (and not exclusively economic) drivers of land use choices and, through an ecosystem services lens, explores three particular areas of land use conflict. These are (i) the continued high level of public support for farming, which has done little to address the problem of low farm incomes; (ii) the pressure to increase woodland planting on farm (and other) land; and (iii) conflicts associated with intensive game management, especially on sporting estates. Using the Scottish situation as an example, the heterogeneity of land use pressures means that there is a danger of the principles of the Land Use Strategy becoming lost in translation from national policy to practical land use decision-making. The appropriate scale for delivery of integrated ecosystem services may therefore be more local than current pilot projects, and may require more active participation of land managers. It may also require policy instruments that are more flexible in adapting to the local context, including payments for ecosystem services. [ABSTRACT FROM AUTHOR]

European agriculture is experiencing a recruitment crisis that threatens the continuation of both family farming and associated rural communities. Conventionally, researchers and policymakers see farm succession as driven by discrete factors such as education level, farm size, profitability, enterprise type, and so on. This article offers an alternative perspective. Drawing on in-depth interviews with 22 farm families in Scotland, it uses a single case-study to outline the concept of endogenous succession cycles based on the iterative and interlinked development of successor identity and farm structure. In this way, succession is seen as predominantly socially constructed. We suggest that the key to succession lies in the development and maintenance of these endogenous cycles as, when they are broken or uninitiated, attracting a successor on to the farm is likely to be exceptionally difficult whatever the policy incentive. We conclude that the current crisis can partly be explained by the breakdown of early childhood socialisation, a key stage of the cycle, caused by changes to agriculture such as the use of larger machinery, more health and safety regulations, fewer farm workers, and so on. As a result, the process of constructing successor identities in early childhood through extended contact between the farmer, the child and the farm is becoming increasingly difficult. [ABSTRACT FROM AUTHOR]

Agroforestry has a potentially important role in helping agriculture address both the climate and biodiversity crises. It provides a means of producing additional marketable goods from agricultural land and enhancing biodiversity at the same time as increasing carbon sequestration and, in silvo-pastural systems, reducing carbon emissions if livestock stocking rates are reduced. However, the uptake of agroforestry in the UK has been limited. This paper adopts Real Options techniques to explore how the decision to adopt agroforestry is influenced by the relative levels of returns from agriculture, forestry and the price of carbon under the scenario where there are financial penalties from livestock Greenhouse Gas (GHG) emissions, financial benefits from carbon sequestration in trees and reversibility in land use decisions. The results are compared to the equivalent findings from a Land Equivalent Value capital budgeting approach to agroforestry adoption. Analysis is based on data from a case study upland livestock farm in Scotland, comparing the impacts of introducing agroforestry into the hill sheep enterprise or the low ground cattle and sheep enterprise. The results suggest that the adoption of agroforestry is far less likely than would be suggested by standard budgeting approaches, especially in more extensive upland enterprises (hill area) where sequestration benefits are low relative to more productive farmland areas (low ground area). Upfront support payments are shown to increase the likelihood of agroforestry adoption. They also have the effect of reducing the rotation length of forestry in such systems. • Real Options techniques are useful for understanding agroforestry adoption. • Agroforestry adoption is unlikely at current carbon price levels. • Biophysical factors have a significant influence on agroforestry adoption. • Upfront payments will significantly increase agroforestry adoption. • Standard budgeting approaches fail to recognise key barriers to agroforestry. [ABSTRACT FROM AUTHOR]

Background: Bovine respiratory disease (BRD) is common in cattle youngstock on UK dairy farms. The current diagnostic methods lack sensitivity and specificity. Thoracic ultrasound (TUS) is a relatively new BRD diagnostic tool with increased accuracy., Method: Data were collected from TUS examinations of 347 calves on Scottish dairy farms and compared to farmer BRD treatment rates. A calf health scoring tool was used to collect information on youngstock health and management on these farms., Results: Of 347 ultrasonographic examinations, 53 (15.3%) were classified as abnormal and 294 (84.7%) as normal. Of the 53 calves classified as abnormal, only 13 (24.5%) were treated by the farmer; however, of the 294 classified as normal, 22 (7.5%) were treated., Conclusion: The results indicated farmers were misdiagnosing BRD in youngstock. Use of TUS on UK farms may improve diagnostic rates and accuracy, reduce the unnecessary use of antimicrobials and demonstrate the value of preventive healthcare programmes., (© 2021 MSD Animal Health. Veterinary Record published by John Wiley & Sons Ltd on behalf of British Veterinary Association.)

Background: Accurate estimation of antimicrobial use (AMU) is important in assessing reduction of agricultural AMU. This cross-sectional study aimed to evaluate several approaches for estimating AMU at the herd level and to report on AMU for beef and dairy farms in Scotland., Methods: Pharmaceutical sales data for 75 cattle herds (2011-2015) were screened for antimicrobial products and aggregated by herd and year. Several denominators for usage estimates were calculated and compared for their suitability at the herd level., Results: The median total mass of active ingredient sold per kg of bovine livestock was 9.5 mg/kg for beef herds and 14.3 mg/kg for dairy herds. The 'highest priority critically important' antimicrobials (HPCIA) were by total mass of active ingredient, 10.6% of all sales; by total defined daily dose veterinary (DDDVet), 29.8% and by DCDvet, 20.0%. These are the first estimates of AMU for beef cattle in the UK, and for cattle of any kind in Scotland. Estimates of herd-level usage based on population correction unit (PCU) were sensitive to low values for PCU for specific herd-years due to their demographic composition., Conclusion: Pharmaceutical sales data can provide useful estimates of AMU, but estimating usage per PCU is not appropriate for comparing groups of cattle with different demographic compositions or for setting herd-level targets. Total mass of active ingredient per kilogram of livestock is more stable and hence suitable than PCU-based methods for assessing AMU at the herd level., (© 2021 The Authors. Veterinary Record published by John Wiley & Sons Ltd on behalf of British Veterinary Association.)

There is a complex relationship between land-use, the environment, food production and quality. Regulatory and non-regulatory interventions, such as application of biosolids to agricultural land, are often undertaken at a field- or farm- level and the aggregated effects across farms and regions are difficult to understand, predict, and communicate to others both spatially and temporally. The aim of this paper was to introduce Waste to Land (W2L). W2L is a novel, holistic tool that combines spatial data analysis methods, multi-criteria analysis, and numerical models to detect areas for optimum biosolids application and to predict the spatial effect of applying biosolids to land. A robust framework was developed first to chart the effects of applied biosolids on the environment and, potentially, on the human food chain. Selecting cadmium as a prototype contaminant, a conceptual model was designed as the basis to define the workflow for the tool. Using the open-source, statistical language R and freely available data, the operation and outputs from the tool were demonstrated at a national scale in Scotland, UK. The results provided fresh intelligence on the ability of the Scottish Landbank to receive biosolids and on the spatial effect of landspreading biosolids, to facilitate the exchange of information between stakeholders, and to enable decision-making in a context of spreading biosolids on farmland. • A novel tool to predict the spatial effect of applying biosolids to land is proposed • The tool combines spatial data analysis, multi-criteria analysis, and numerical models in R • The tool's feasibility and potential was verified through stakeholder engagement • The tool will allow gaining new knowledge, enhancing communication among stakeholders, and aiding the decision-making process [ABSTRACT FROM AUTHOR]

Anthelmintic resistance threatens the sustainability of sheep production globally. Advice regarding strategies to reduce the development of anthelmintic resistance incorporates the outcomes of modelling exercises. Further understanding of gastrointestinal nematode species diversity, and population dynamics and genetics (which may vary between species) is required to refine these models; and field studies combining faecal egg outputs, species composition and resistance genetics are needed to calibrate them. In this study, faecal samples were taken from ewes and lambs on a commercial farm in south-eastern Scotland at approximately 3 t-4 week intervals between spring and autumn over a period of 4 years. Faecal egg counts were performed on these samples, and L 3 were collected from pooled coprocultures. Deep amplicon sequencing was used to determine both the species composition of these L 3 and the proportions of benzimidazole-resistant single nucleotide polymorphisms in the isotype-1 β-tubulin locus of the predominant species, Teladorsagia circumcincta L 3 . Despite consistent management throughout the study, the results show variation in gastrointestinal nematode species composition with time and between age groups, that was potentially associated with weather conditions. The F200Y benzimidazole resistance mutation is close to genetic fixation in the T. circumcincta population on this farm. There was no evidence of variation in isotype-1 β-tubulin single nucleotide polymorphisms frequency between age groups, and no genetic evidence of reversion to benzimidazole susceptibility, despite targeted benzimidazole usage. This study highlights the need to include speciation when investigating gastrointestinal nematode epidemiology and anthelmintic resistance, and serves as an example of how genetic data may be analysed alongside species diversity and faecal egg counts, when markers for other anthelmintic classes are identified., (Copyright © 2021 Australian Society for Parasitology. Published by Elsevier Ltd. All rights reserved.)

Grain legumes have declined to a low base in many regions of intensified agriculture yet have the potential both to safeguard food security and satisfy rising ethical demands from food consumers. Here, the scope for legume expansion is examined in a long‐established agricultural region in eastern Scotland where grain legumes declined to <0.3% of cropped area in the 1930s and now vary around 1%. Data from the EU's Integrated Administrative and Control System (IACS) were combined with national agricultural survey to resolve uncertainties over possible restrictions to expansion following 20th‐century intensification. The grain legumes, peas and beans for animal and human consumption, were found to occupy six crop‐grass systems covering a wide range of agronomic input and geographical location. The phase of agricultural intensification between 1950 and 1990 had widened rather than restricted the systems in which they occur and could expand. Moreover, the diversity of the crop‐grass systems provides scope for complementary expansion of several products such as beans for aquaculture, pulses for human consumption, and peas for stockfeed without diminishing the areas of the most profitable crops. Among crop systems, N inputs following 20% legume inclusion would fall from the current 178 to 140 kg/ha (78.6%) at the high‐input end of the range and from 92 to 71 kg/ha (77.0%) at the low‐input end. Further reductions to 50%–60% of the existing N input to intensive crop sequences were estimated assuming a residual fixed nitrogen of 50–75 kg/ha and legume inclusion of 33%. Legume expansion would also bring a range of environmental benefits across all crop‐grass systems. While analysis using IACS brought many insights, major limitations to estimating national N‐balances were identified in lack of data on residual N following legumes, in imported animal feed and in the contribution of forage legumes to grassland. [ABSTRACT FROM AUTHOR]

Gastrointestinal nematodes (GIN) are a serious concern for sheep producers worldwide. However, there is a paucity of evidence describing the epidemiology of GIN on modern UK sheep farms. The aim of this paper was to understand whether expected seasonal variations of infection are still found in ewes and lambs under varying management strategies in temperate climates. Faecal egg counts (FEC) were conducted on freshly voided samples collected from groups of ewes and lambs every third week for twelve months on three farms in southeast Scotland. The patterns of egg output have been described here in relation to management practices undertaken on the farms. Despite changes in farming practice and climatic conditions, the findings complement historical studies detailing the epidemiology of GIN. Findings include a periparturient rise in ewe FEC on two of the farms, while lambing time treatment appeared to suppress this on the third farm. On the same two farms lamb FEC increased during the summer, reaching a peak in the autumn. The work also highlights how the ad hoc use of anthelmintics does little to impact these patterns., (Copyright © 2019 The Authors. Published by Elsevier B.V. All rights reserved.)

Determining the Bovine Viral Diarrhoea (BVD) infection status of cattle herds is a challenge for control and eradication schemes. Given the changing dynamics of BVD  virus (BVDV) antibody responses in cattle, classifying herds based on longitudinal changes in the results of BVDV antibody tests could offer a novel, complementary approach to categorising herds that is less likely than the present system to result in a herd's status changing from year to year, as it is more likely to capture the true exposure dynamics of the farms. This paper describes the dynamics of BVDV antibody test values (measured as percentage positivity (PP)) obtained from 15,500 bovines between 2007 and 2010 from thirty nine cattle herds located in Scotland and Northern England. It explores approaches of classifying herds based on trend, magnitude and shape of their antibody PP trajectories and investigates the epidemiological similarities between farms within the same cluster. Gaussian mixture models were used for the magnitude and shape clustering. Epidemiologically meaningful clusters were obtained. Farm cluster membership depends on clustering approach used. Moderate concordance was found between the shape and magnitude clusters. These methods hold potential for application to enhance control efforts for BVD and other infectious livestock diseases.

Excessive negative energy balance (EB) has been associated with decreased reproductive performance and increased risk of lameness and metabolic diseases. On-farm, automated EB estimates for individual cows would enable dairy farmers to detect excessive negative EB early and act to minimize its extent and duration by altering feeding. Previously, we have shown that EB can be estimated from frequent measurements of body weight (BW) and body condition score (BCS) changes, referred to as EB body . In this study, we investigated the robustness and sensitivity of the EB body method to assess its genericity and on-farm applicability. We used 5 data sets with BW of lactating cows (name of data set in parenthesis): 65 Holstein cows in a French feeding trial (INRA); 6 Holstein cows in a British feeding trial (Friggens); 31 Holstein cows and 17 Jersey cows in a Danish feeding trial (DCRC); 140 Holstein cows in a British feeding trial (Scotland's Rural College, SRUC); and 1,592 Holstein cows on 9 Danish farms with milking robots (automatic milking system). We used the INRA and Friggens data sets to develop a dynamic formula to correct BW for increasing residual gut-fill (RGF) during early lactation. With the DCRC data, we tested the effect of smoothing parameters and weighing frequency on EB body . Also, 2 robustness tests were performed using the SRUC data to test the effect of diet change on BW and the automatic milking system data to test the effect of farm on BW variation. Finally, we combined the results into a blueprint describing different ways to calculate EB body depending on the purpose and on the availability of BCS. The dynamic RGF adjustment resulted in a lower empty BW during early lactation than that obtained with the previously used constant RGF. The double-exponential smoothing method used to correct for meal-related gut-fill was robust to choice of smoothing parameters. Cows should be weighed at least once every 4 d during early lactation to capture the duration of negative EB body . Our EB body method proved robust to diet changes. Finally, although cow BW varied significantly between farms, the quantile regression smoothing of BW did not bias the estimation of weight differences between herds. In conclusion, these results validate the applicability of the EB body method to estimate EB across a range of farm conditions, and we provided a blueprint that enables the estimation of EB body for individual cows on-farm using only frequent BW, in combination with BCS when available., (The Authors. Published by FASS Inc. and Elsevier Inc. on behalf of the American Dairy Science Association®. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).)