1,720,956 research outputs found
Effect of Nitrogen Fertilizer (Urea) Rate Application on Growth Performance of Potato (Solanum Tuberosum L.) on Vertisols of Central Highland of North Shewa, Ethiopia
Get PDFA study was conducted to determine response of potato (Solanum Tuberosum L.) to different rates of nitrogen fertilizer (urea) applied as 0 kg/ha, 81 kg/ha 165 kg/ha and 246 kg/ha on vertisols of Debre Berhan university demonstration site which was located at central highlands(North Shewa) of Ethiopia. Treatments were arranged in RCBD design. Data was collected after 50% of plants were produced flower in which it was sampled randomly from center of plot. Application of Nitrogen Fertilizer urea 246kg/ha and 165kg/ha delayed days to flowering, increases stem length, above ground biomass, underground biomass, branch number, and stem number as compared to the control(N=0kg/ha). It was observed that application of 165 kg urea/ha is required for optimum growth and performance of potato Gorebeilla variety on Vertisols of Debre Berhan in central high lands of Ethiopia. Keywords: - Potato, gorebeilla variety, Nitrogen fertilizer, aboveground performance, underground performance, different Rate application DOI: 10.7176/ALST/80-01 Publication date: April 30th 202
Cause, Magnitude and Management of Post-Harvest Loss Impact in Food Security of Ethiopia –Review
Get PDFPeople in developing countries often facing losses of staple foods. Ethiopia is country depended on food imports to feed its population. Food security is one of most pressing issues that demand our immediate attention in Ethiopia there by post-harvest loss leads to food insecurity, higher food prices, and ultimately loss of scarce resources used in food production. The major post-harvest loss causes are, inefficient operational activities such as harvesting, handling techniques, packaging, storage, transportation facility, marketing situation and disease and pest. Its losses in developed countries are relatively high at consumer end, while in developing (Ethiopia) countries relatively high in early stages of farm level. Magnitudes of post-harvest loss along value chain have been above 5,000 metric tons per annum for all crops and their losses estimated between 10 to 50 percent in Ethiopia. In addition, Ethiopia’s total post-harvest losses 2.04 million tons for a grain at a time when Ethiopia’s import requirement is 1.16 million tons. So that, issue of food losses reduction is high importance in efforts to combat hunger, raise income and improve food security. Therefore, in order to achieve sustainable food security, producers, retailers, wholesalers, research institutes and other public and none governmental organizations need to have collaborate to reduce post-harvest loss at farm, wholesale, retail and consumer levels in Ethiopia. DOI: 10.7176/FSQM/116-01 Publication date:June 30th 202
Review of Postharvest Loss Effects, Magnitudes, Challenges and Management Practices in Ethiopia
Get PDFThis review was aimed to recognize the effect, challenge, magnitude and management practices of postharvest losses in Ethiopia. Global efforts in fight against hunger to raise income and improve food security especially in world poorest country should give priority to the issue of postharvest loss. Postharvest loss is major problem to persistence food insecurity to meet food demand of rapidly growing population. An average magnitude of postharvest losses along value chain of selected (horticultural and cereal) crops has been estimated 10 to 50 % in Ethiopia. Major challenges facing in postharvest handling include lack of: - awareness, communication, targeted policies and strategies, evidence-based postharvest loss assessments, institutional and organizational arrangements, targeted financing and investment in postharvest handling to ensure food security of Ethiopia. Hence, improved postharvest handling practices, better education to farmers, improved infrastructure in order for products to reach markets, developed value chains, collaboration between actors in supply chains and improved technologies must give attention to reduce postharvest loss to achieve improved food security in Ethiopia. Keywords: - postharvest loss, effects, challenges, magnitudes, management practices DOI: 10.7176/FSQM/101-03 Publication date:September 30th 202
Evaluation of Phytochemical Content and Antioxidant Capacity of Processed Fenugreek (Trigonella foenum-graecuL.) Flour Substituted Injera
Get PDFInjera, is cultural food of some East African Countries particularly Ethiopia, Eritrea and to some extent Somalia which prepared from cereals such as teff, sorghum and maize. Fenugreek (Trigonella foenum-graecum L.) provides various active compounds that are essential for health promotion, disease prevention and food preservation. It can be exploited as functional and nutritional foods as well as therapeutic agent. This study was conducted to evaluate phytochemical contents and antioxidant capacity of fenugreek (roasted, germinated or raw) flour substituted teff injera. Phytochemical contents of total flavonoid content (TFC) and total condensed tannin content (TCTC) of fenugreek substituted injera were determined using aluminum chloride colorimetric and vanillin HCl assay methods respectively. DPPH (2, 2-Diphenyl-1-Picrylhydrazyl) scavenging (%) and reducing power were taken as evaluation parameters for determination of antioxidant capacity of fenugreek substituted injera. The highest TFC (117.4 ± 1.56 mg of cathechin equivalent/g of dried extract) and TCTC (18.44 ± 0.48 mg of cathechin equivalent/g of dried extract) contents were found in 5% roasted and 5% raw fenugreek substituted injera respectively. The 5% roasted fenugreek substituted injera showed strongest, DPPH radical scavenging activity (IC50 = 0.27 ± 0.05 mg/mL) and ferric ion reducing power (IC50 =0.89 ± 0.05 mg/mL) than the other tested injera samples. In conclusion substitution of processed (roasted and germinated) fenugreek flour with teff flour showed more improvement in antioxidant capacity and total flavonoid content than that of raw fenugreek flour substituted injera. Keywords: Phytochemical contents, Antioxidant capacity, processed fenugreek flour, teff flour DOI: 10.7176/FSQM/92-01 Publication date: December 31st 201
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
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