1,720,958 research outputs found
Evaluation of the Effects of Intra and Inter Row Spacing on the Growth and Yield of Ground Nut (Arachis Hypogaea L.) at Haro Sabu, Western Ethiopia
Get PDFGround nut (hypogaea L.) is one of most important food crop grown in Oromia Regional State, Ethiopia. However, its productivity is very low due to inappropriate intra and inter spacing practice. Thus,the study was conducted in 2016 and 2017 during the main cropping season at Haro Sabu Agricultural Research Center and Kombo subsite of Kelem Wollega zone of Western Ethiopia to identify the effects of different spacing on growth parameters, yield and yield components of ground nut varieties. The experiment was laid out in Randomized complete Block design with three replications in factorial arrangement. The experiments was consist of two factors. Nine levels of spacing were 50cmx5cm, 50cmx10cm, 50cmx15cm, 60cmx5cm, 60cmx10cm, 60cmx15cm 75cmx5cm, 75cm x10cm, 75cm x15cm and two varieties (Manipinter and Sartu). The highest total number of pods per plant (21.36) was obtained from variety manipinter. Regarding to spacing, the highest number of pods per plant (25.00) was obtained from 75cmx10cm and followed by 75cmx15cm(22.45) . The highest hundred seed (66.85g) weight and grain yield (2105 kg ha-1) was recorded from manipinter variety. Regarding to spacing, the highest grain yield (2474 and 2433 kg ha-1) was obtained from 50cmx5cm and 60cm x5cm respectively. The highest net benefit (50269.00 and 50245.00 ETB ha-1) was recorded from 50cmx5cm and 60cmx5cm spacing respectively. However the highest marginal rate return (288.46%) was recorded from spacing 60cm x 5cm followed by 50cm x 5cm (2.66%). Therefor spacing of 50cmx5cm and 60cmx5cm was optimum plant population density for production of ground nut in Kelem Wollega zone of western Ethiopia. Keywords: Arachis hypogaea L., grin yield, interaction effect, spacing DOI: 10.7176/ALST/70-0
Effect of Nitrogen Level and Plowing Frequency on Sesame (Sesamum indicum L.) Yield and Yield Component in Western Oromiya, Ethiopia
Get PDFThe field experiment was carried out at Haro Sabu on station, Guliso and Igu kofale location during cropping season of 2014/15 with the objectives of determining the optimum of nitrogen and plowing frequency required for high yield of sesame. The experiment was laid out in RCBD with three replication in factorial combination of six nitrogen level (0, 8, 18, 28, 38, 48kg N ha-1) and three plowing frequency (one, two and three times) on sesame (Dicho) variety. Plant height was significantly (P < 0.05) affected by Nitrogen level and highly significantly (P < 0.01) affected by plowing frequency. The highest plant height (91.20cm) and (91.18 cm) was recorded from 48 kg N ha-1 and three times plowing frequency, respectively. Number of branch per plant was significantly (P<0.05) affected by nitrogen level. The highest number of branches per plant (4.40) was obtained from 38kg N- ha. Number of pod per plant was significantly (P<0.05) affected by Nitrogen level and Plowing frequency. The highest number of pod per plant (125.79) and (124.57) was recorded from 8kgN-ha and three times plowing frequency, respectively. Grain yield was highly significantly (P<0.01) affected by Nitrogen level and plowing frequency. The lowest grain yield (3.40 quintal ha-1) was obtained from 0kg N ha-1. The highest (5.41 quintal ha-1) grain yield was obtained from three time plowing frequency. Partial budget analysis of N fertilizer rates indicted that higher marginal rate of return (1351%) was found by applying 8 kg N ha-1. Therefore Applications of 8 kg ha-1 of nitrogen and three times plowing frequency, was recommended for increased yield and better economic returns to sesame growers at study area. Keywords: Nitrogen level, plowing frequency, Sesamum indicum L
Performances of Different Varieties and Population of Soybean (Glycine max L.) under Intercropping Systems with Maize (Zea mays L.)
Get PDFThe field experiment was carried out at Haro Sabu Agriculture Research Center, during 2013 with the objectives of determining the effect of varieties and population density of soybean intercropped with maize on phenological and growth parameters of the component crops. The experiment was laid out in RCBD with three replication in factorial combination of three soybean varieties (Boshe, Ethio Yugoslavia and Didesa) and three soybean plant populations (25%, 50% and 75%) along with respective sole crop of soybean varieties and maize BHQPY-545. Plant population of soybean had significant (P<0.05) effect on LAI of maize. The highest LAI (3.61) was obtained from 50% soybean population. The LA, LAI and number of primary branches of soybean component showed significant difference due to plant population. The highest LA per plant (3392.60 cm2) and number of primary branches (6.22) were obtained in soybean population of 25%. However, the highest LAI (4.96) was obtained from 75% soybean population. Plant height, number of effective nodules per plant, number of primary branches, of soybean were significantly (P<0.01) affected by soybean varieties. The highest plant height (123.89cm) was obtained from Ethio Yugoslavia. The highest number of primary branches per plant was obtained from variety Boshe (7.33). The Highest number of effective nodules (30.33) was recorded for variety Didesa. Cropping system showed highly significant (P<0.01) effects on number of effective nodules per plant and significant (P<0.05) effect on leaf area index. The result revealed that cropping system had a significant effect on LAI and number of effective nodules per plant where higher LAI (6.18) and effective nodules per plant (46.44) were recorded from sole cropped soybean variety than the intercropping system. Keywords: Glycine max, intercropping, plant populations, sole cropping, Zea may
Impact of Inorganic Fertilizers on Yield and Yield Components of Linseed (Linumusitatissimum L.) at Western Ethiopia
Get PDFThe study was conducted west showa zone, Chaliya district Chobi Tulu Chori kebele and Horo Guduru Zone, Horo District Gitilo Dole Kebele during 2018 and 2019 main cropping season to identify optimum agronomic and economic threshold of NPS and Nitrogen inorganic fertilizers. The experiment consisted of two factors (0, 25, 50, 75 and 100 kg ha-1 NPS rates) and (0, 23, 46 and 69 kg ha-1 Nitrogen rates). A total of 20 treatments were laid out in Randomized Complete Block Design with three replications in 5x4 factorial arrangement. The results indicated that primary branch, capsule per plant and yield of linseed were significantly influenced by the effects of NPS and nitrogen fertilizers. The highest grain yields (1400kg and 1382 kg ha-1) were obtained from the application of 25 kg ha-1 NPS + 69 N kg ha-1 and 25 kg ha-1 NPS + 46 kg ha-1 N fertilizers respectively. The lowest grain yield (520 kg ha-1) was recorded from the control treatment (0 kg ha-1NPS + 0 kg ha-1N fertilizers). This indicates that 62.86% yield reduction was recorded as compared to the application of 25 kg NPS ha-1 + 69 kg N ha-1 fertilizer The partial budget analysis indicated that highest net benefit (35389ETB) and acceptable marginal rate of return (2038%) were obtained from the application of 25 kg NPS ha -1 + 46 kg N ha-1. Therefore application of 25 kg NPS + 46 kg N ha-1 fertilizer rates was recommended for linseed production in the study area and similar agroecology. Keywords: Fertilizer, linseed, marginal rate of return, net benefit. DOI: 10.7176/JNSR/12-9-04 Publication date:May 31st 202
Influence of Varieties and Population of Intercropped Soybean with Maize on Land Equivalent Ratio (LER) and Growth Monetary Value (GMV) of the Component Crops
Get PDFThe study was conducted to determining the effect of varieties and population densities of soybean intercropped with maize on LER and GMV of components of associated crops. The experiment was laid out in RCBD with three replication in factorial combination of three soybean varieties (Boshe, Ethio-Yugoslavia and Didesa) and three soybean plant populations (25%, 50% and 75%) along with respective sole crop of soybean varieties and maize BHQPY-545. The partial land equivalent ratio (PLER) and total land equivalent ratio (TLER) of maize and soybean intercrops were significantly (P<0.01) affected by plant population and soybean variety. The highest LER (1.54) was obtained from the combination of 100% maize x 50% soybean followed by 100% maize x 75% soybean (1.51) and the lowest was from 100% maize x 25% soybean (1.38). The GMV of intercrops was highly significantly (P<0.01) affected by main effect of soybean variety and plant population and cropping system. The highest GMV (36490 ETB ha-1) and the lowest (32390 ETB ha-1) were obtained from varieties Didesa and Ethio Yugoslavia intercropped with maize, respectively. Considering the experimental findings intercropping of maize with 50% soybean population and Didesa Variety was recommended for the study area. Keywords: Glycine max, GMV, LER, intercropping, plant populations, sole cropping, Zea mays 1
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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