1,720,959 research outputs found
Yield reduction and arsenic accumulation in potatoes (Solanum tuberosum L.) in an arsenic contaminated soil
Full text linkThe different levels of arsenic (As) had a significant effect on the yield, yield reduction and As accumulation of different potato varieties. The yield was negatively affected by the As contamination and decreased with the increasing As levels in the soil, but remained statistically similar up to 25 mg kg-1 soil of As and thereafter drastically decreased with the increasing As levels. The yield reduction (%) and accumulation of As in the tuber peels and flesh increased with the increasing As levels. Among the fourteen potato varieties, 'Felsina' had the maximum yield and showed the lowest percentage of yield reduction; 'Jam alu' and 'Cardinal' accumulated the least amount of As in their peels and flesh, respectively. Among the treatment combinations, 'Felsina' cultivated in an As-free soil had the highest yield/plant (454.8 g fresh weight). 'Laura' grown in 25 mg kg-1 soil of As showed the lowest yield reduction (%). Although 'Jam alu' and 'Cardinal' produced a slightly lower yield compared to some other varieties, these two varieties accumulated the least amount of As, both in the peels and flesh, when grown in 25 mg kg-1 soil of As
GROWTH AND YIELD OF T. AMAN RICE VARIETIES AS AFFECTED BY SEEDLING NUMBER HILL-1 AND UREA SUPERGRANULES
Full text linkA Thesis
Submitted to the Department of Horticulture
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree
of
MASTER OF SCIENCE (MS)
IN
AGRONOMYA field experiment was conducted at the experimental field of Sher-e-iIangla agricultural
university during July to December 2007 to find out the effect of four levels of seedling
hill4 vii;
I. 13 and 4 and two forms of nitrogen fertilizer-prilled urea (PU) and urea
supergranules (USC) on growth, yield and yield components of modem (BRRI Dhan 44)
and traditional (Nizershail) transplant oman
rice. The experiment was laid out in a split-
split-plot design with three replications. Urea was top dressed 58 kg N haS ' in three
equal splits at 10, 30 and 50 DAT. The USC (1.8 g) was placed at 5-10cm soil depth
at 10 DAT in the center of four hills in alternate rows
1 granule in one spot to
supply 58 kg N haS
'. Results showed that rice varieties differed significantly in all
growth characters and BRRI Dhan 44 produced higher grain yield (4.85 t ha'). Two
seedlings hill' gave the highest grain yield (3.96 t hi') while four seedlings hill' had
the highest numbers of total tiller hill', leaf area index and total dry matter. USC
performed well in growth and gave higher grain yield (12.2%) over PU. Interaction
results showed that significantly higher grain yields were given by transplanting one
seedling of 13RRl Dhan 44 (5.38 t hi'), application of USC in I3RRI Dhan 44 (5.08 t
hi') and transplanting one seedling hilr' with application USC (4.18 t had) and
finally placement of USC by transplanting one seedling hill' of BRRI Dhan 44 (5.77
hi'). The higher grain yield was attributed mainly to the number of effective tillers
bill', filled grains panicle' and 1000-grain weight
GROWTH AND YIELD OF T. AMAN RICE VARIETIES AS AFFECTED BY SEEDLING NUMBER HILL 1 AND UREA SUPERGRANULES
Full text linkA Thesis
Submitted to the Department of Horticulture
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree
of
MASTER OF SCIENCE (MS)
IN
AGRONOMYA field experiment was conducted at the experimental field of Sher-e-iIangla agricultural
university during July to December 2007 to find out the effect of four levels of seedling
hill4 vii;
I. 13 and 4 and two forms of nitrogen fertilizer-prilled urea (PU) and urea
supergranules (USC) on growth, yield and yield components of modem (BRRI Dhan 44)
and traditional (Nizershail) transplant oman
rice. The experiment was laid out in a split-
split-plot design with three replications. Urea was top dressed 58 kg N haS ' in three
equal splits at 10, 30 and 50 DAT. The USC (1.8 g) was placed at 5-10cm soil depth
at 10 DAT in the center of four hills in alternate rows
1 granule in one spot to
supply 58 kg N haS
'. Results showed that rice varieties differed significantly in all
growth characters and BRRI Dhan 44 produced higher grain yield (4.85 t ha'). Two
seedlings hill' gave the highest grain yield (3.96 t hi') while four seedlings hill' had
the highest numbers of total tiller hill', leaf area index and total dry matter. USC
performed well in growth and gave higher grain yield (12.2%) over PU. Interaction
results showed that significantly higher grain yields were given by transplanting one
seedling of 13RRl Dhan 44 (5.38 t hi'), application of USC in I3RRI Dhan 44 (5.08 t
hi') and transplanting one seedling hilr' with application USC (4.18 t had) and
finally placement of USC by transplanting one seedling hill' of BRRI Dhan 44 (5.77
hi'). The higher grain yield was attributed mainly to the number of effective tillers
bill', filled grains panicle' and 1000-grain weight
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
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