1,720,959 research outputs found
'On-farm' seed priming: an ecological & sustainable disease management strategy
No full textThe dataset contains the results from a series of germination and seedling vigour tests for two barley cultivars subjected to different soaking times. The dataset also contains weight and seed respiration measurements during seed soaking. This data was used in the Seed Science Research paper "Using seed respiration as a tool for calculating optimal soaking times for ‘on-farm’ seed priming of barley (Hordeum vulgare)", Carrillo-Reche, Newton & Quilliam (2021). In the manuscript, we show how seed respiration principles, previously utilised for the study of seed germination, can be used as an effective tool to rapidly find cultivar- and seed quality-specific optimal seed priming duration without the need for a cumbersome series of germination assays and mini-plot trials (current practice). It provides a greater understanding of physiological events and pre-germinative process of barley seed during priming (e.g. energetic and metabolic activity), and links them to their invigorating benefits. The mechanistic of these invigorating effects, i.e. timing and contribution of their drivers, are discussed in detail against the current knowledge.(1.) ESM0. Cover-page.docx (2.) ESM1. Germination and desiccation tests.xlsx - Spreadsheet containing raw data from measurements during priming, and seed performance results from germination and desiccation test.
ESM2. Seedling vigour test.xlsx - Spreadsheet containing seedling performance results from a series of seedling vigour tests
'On-Farm’ Seed Priming: A Strategy for Ecological & Sustainable Agriculture
Full text linkThere is an urgent need to intensify food production globally and reduce our reliance on synthetic agronomical inputs. Crop establishment is the most vulnerable stage in the crop cycle, therefore, sustainable strategies with the potential to alleviate unfavourable seedbed conditions are crucial to ensure yield potential is not restricted early in the season. Industrial seed priming is an effective strategy, but it is both energy-intensive and expensive. ‘On-farm’ seed priming offers a low-cost alternative; however, it is commonly underutilised in the developing world, and it has never before been evaluated in a European agricultural context. Therefore, this thesis sought to determine the potential contribution of ‘on-farm’ seed priming to increase food production in the developing world. In addition, the aim was to assess the effectiveness of ‘on-farm’ seed priming together with chitosan (an organic plant elicitor) to sustainably intensify barley (Hordeum Vulgare L.) production in conventional European agrosystems. Quantitative analysis showed that ‘on-farm’ seed priming had a significant positive effect on crop yields (on average, a 21 % increase over farmers’ practice) in the developing world, and was most effective in dry climates, and nutrient deficient or salinity-stressed environments. In European conventional barley systems, ‘on-farm’ seed priming and chitosan-based seed treatments enhanced spring barley yields through improving emergence and seedling vigour, and led to a greater number and size of tillers being retained for grain filling. By contrast, winter barley did not benefit from seed priming treatments. Although seed treatments can promote emergence, it is likely that they alter the adaptative mechanism for overwinter acclimation and result in a fitness cost. It was found that a greater canopy size can provide a certain degree of tolerance to pre stem elongation powdery mildew (Blumeria graminis) infection and that rapid stem elongation limited secondary spreads of powdery mildew and, hence, provide a certain level of disease escape. Overall, this thesis provides the evidence for governmental institutions and policymakers in developing countries to promote ‘on farm’ seed priming as a recommended practice. In a European agricultural context, seed treatments can be included as one more management practice in spring-sown crops to ensure that yield potential is not restricted early in the season. Seed treatments may deliver disease tolerance and escape traits, but these benefits will be conditional upon conferring successful establishment and vigour first
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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