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Evaluation of Malaysian Rice Genotypes for Adaptability in Zinc Deficient Soil
No full textSignificant increase in rice production is required to provide sufficient rice for the growing population. Among other factors, Zn deficiency also contributes to the low rice yield. Zn deficiency in rice production is widespread globally and study of Zn nutrition in rice production in Malaysia is limited. This study was undertaken to determine the Zn status of Malaysian rice soils, to evaluate the Zn
efficiency of selected rice genotypes and to determine the response of Zn application and the Zn residual effect on the growth and yield of rice in the field.
Soil samples of 15 soil series (Kranji, Sedaka, Guar, Kundur, Tualang, Teluk Chengai, Kuala Kedah, Rotan, Sedu, Kangkong, Batu Hitam, Lubok Itek, Tepus, Telemong-Akob and Champaka) were collected from paddy growing areas in
Kedah and Kelantan, Malaysia and their Zn status were determined. These samples were taken from 3 different depths (0 -15 cm, 15 – 30 cm and 30 - 45cm). The Zn concentrations of the 15 soil series were found to be significantly different at different depths and locations, and the concentration ranged between 0.22 to 2.64 μg g-1.
Thirty one rice genotypes were obtained from the Malaysian Agricultural Research Development Institute (MARDI) for the determination of Zn concentration in husked and unhusked rice. The Zn concentration in the husked rice indicated that 18 out of 31 rice genotypes were below the critical limit (< 20μg g -1) of Zn concentration. Zinc concentrations in all genotypes were found to be significantly lower after dehusking. However, minimum differences between husked and unhusked rice were observed in SM2 and MR 106 genotypes.
The Zn efficiency of ten rice genotypes ( Kadaria, MR 219, MR 220, MR 211,Bahagia, Seri Malaysia Dua, MR 185, MR 106, MRQ 74 and Jaya) were studied by using three levels (0.007, 0.035, and 3.5 mg L-1) of Zn under hydroponic culture. Zn efficiency among the genotypes varied from 45.4 to 87.4%. Seri Malaysia Dua and MR 106 were ranked as Zn efficient while Jaya, MRQ 74, MR211 and Bahagia were ranked as Zn inefficient rice genotypes.
To confirm the results of the hydroponic culture study, a glasshouse and two continuous seasons of field experiments were conducted in Kangkong soil series which has low Zn status. Each experiment was conducted using 6 rice
genotypes (Seri Malaysia Dua, MR 106, MR 219, MR 220, MR 211 and Bahagia) with two levels (0 and 15 kg ha-1) of Zn. The results from glasshouseand two continuous seasons of field experiment showed that SM2 and MR 106 genotypes were Zn efficient, MR 219 and MR 220 were moderately efficient,
and MR 211 and Bahagia were Zn inefficient rice genotypes. The results from field study revealed that Zn application increased yield of all rice genotypes between 16.2% and 47.5%. It was found that the Zn efficient rice genotype MR
106 produced better yield with no Zn application as compared to the other rice genotypes.
Based on the results obtained in this study it is concluded that soils of rice growing areas in Kedah and Kelantan were low in Zn content. The Zn efficient rice genotypes, especially the MR 106, have the ability to grow well without Zn application in submerged acid soil, and only loss very little Zn after de-husking
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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