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PENGUJIAN BEBERAPA VARIETAS KEDELAI (Glycine max L.) PADA KONDISI CEKAMAN KEKERINGAN
Full text linkSoybean (Glycine max L.) is one of the main food crop commodities in Indonesia which ranks third after rice and corn. The need for soybeans from year to year continues to increase, while domestic soybean production is unable to meet so that Indonesia must import soybeans. Efforts to reduce dependence on soybean imports can be made by increasing domestic soybean production. Increased soybean production is often less successful if faced with land conditions that experience stress, especially drought stress. The use of soybean varieties that are resistant to drought stress is needed to prevent the risk of yield reduction due to drought. This research was conducted using a 2-factor factorial completely randomized design (CRD). The first factor is the volume of water application, consisting of 4 levels: 100% water requirement, 80% water requirement, 70% water requirement, and 60% water requirement. The second factor is soybean genotype, consisting of 3 levels, namely: The parameters observed were: plant height, flowering age, harvesting age, root length, root dry weight, crown dry weight, root crown ratio, total number of pods per plant, number of pods, number of seeds per plant, and seed weight per plant. The research data were analyzed by analysis of variance and continued with Duncan's multiple range test at the 5% level. The results showed that the soybean variety Dering 3 can be recommended as a drought tolerant variety based on several parameters observed (plant height, flowering age, number of pods per plant, number of pods per plant, number of seeds per plant, seed weight per plant). Keywords: Growth, Yield, Soybean, Drought Tolerant INTISARIKedelai (Glycine max L.) merupakan salah satu komoditas tanaman pangan utama di Indonesia yang menempati urutan ketiga setelah padi dan jagung. Kebutuhan kedelai dari tahun ke tahun terus meningkat, sedangkan produksi kedelai dalam negeri tidak mampu memenuhi sehingga Indonesia harus impor kedelai. Upaya dalam mengurangi ketergantungan terhadap impor kedelai dapat dilakukan dengan meningkatkan produksi kedelai dalam negeri. Peningkatan produksi kedelai seringkali kurang berhasil jika dihadapkan pada kondisi lahan yang mengalami cekaman, khususnya cekaman kekeringan. Penggunaan varietas kedelai yang tahan terhadap cekaman kekeringan diperlukan untuk mencegah resiko penurunan hasil akibat kekeringan. Penelitian ini dilakukan dengan menggunkan Rancangan Acak Lengkap (RAL) faktorial 2 faktor. Faktor pertama volume pemberian air, terdiri dari 4 taraf yaitu: kebutuhan air 100%, kebutuhan air 80%, kebutuhan air 70%, dan kebutuhan air 60%. Faktor kedua adalah genotipe kedelai, terdiri dari 3 taraf yaitu: varietas Devon 1, varietas Deja 1 dan varietas Dering 3. Parameter yang diamati yaitu: tinggi tanaman, umur berbunga, umur panen, panjang akar, berat kering akar, berat kering tajuk, rasio tajuk akar, jumlah polong total per tanaman, jumlah polong bernas, jumlah biji per tanaman, dan berat biji per tanaman. Data hasil penelitian dianalisis dengan analisis ragam dan dilanjutkan dengan uji jarak berganda Duncan pada taraf 5%. Hasill penelitian menunjukkan bahwal varietas kedelai Dering 3 dapat direkomendasikan sebagai varietas toleran kekeringan berdasarkan beberapa parameter yang diamati (tinggi tanaman, umur berbunga, jumlah polong per tanaman, jumlah polong bernas per tanaman, jumlah biji per tanaman, berat biji per tanaman). Kata Kunci: Pertumbuhan, lHasil, Kedelai, Cekama
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
The Effect of Colchicine Concentration and Immersion Time on Growth and Morphological Characters of Acacia crassicarpa A. Cunn. Ex Benth In-vitro Explants
Full text linkThe production of polyploidy with a chemical mutagen such as colchicine is one strategy that can be applied to improve the genetic traits and wood properties of acacia trees. The aim of this study was to determine the effects of colchicine at various concentrations and immersion times on the percentage of surviving explants, percentage of rooted explants, and morphological traits of shoot and root A. crassicarpa in-vitro. A completely randomized design (CRD) with two factors was used in this study. The first factor was the concentration of colchicine solution with five levels (0,00%, 0,02%, 0,04%, 0,06%, and 0,08%), and the second factor was the immersion time with three levels (24, 48, and 72 hours). There were fifteen treatment combinations with each treatment repeated three times. Data were analyzed by ANOVA and Duncan’s multiple range test at 5% significance level. The results showed that the treatment combination of colchicine concentration with immersion time showed a significant effect on the percentage of surviving explants, number of leaves, number of shoots and height of A. crassicarpa explants, but did not significantly affect on the number of roots, length of the root and percentage of rooted A. crassicarpa explants
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
Studi Komponen Hasil beberapa Genotipe Tanaman Cabai (Capsicum annuum L.) di Lahan Gambut
Full text linkPemuliaan tanaman merupakan salah satu upaya peningkatan produksi cabai. Hasil akhir dari program ini adalah didapatkan varietas yang toleran terhadap lingkungan ketika di tanam pada lahan gambut. Hubungan karakter kuantitatif beberapa genotipe tanaman cabai perlu dipelajari untuk membantu penentuan karakter yang memiliki pengaruh terhadap produksi. Informasi ini membantu dalam proses seleksi untuk mendapatkan calon varietas unggul baru toleran lahan gambut. Rancangan yang digunakan pada penelitian ini adalah rancangan acak kelompok (RAK) yang terdiri dari delapan genotipe dengan tiga ulangan. Data hasil pengamatan selanjutnya dilakukan analisis ragam, kemudian mengatahui kaitan antara satu peubah dengan peubah lainnya dapat memanfaatkan analisis korelasi yakni korelasi Pearson. Setelah mendapatkan informasi korelasi, dilanjutkan dengan sidik lintas. Peubah tidak bebas ditetapkan guna menduga koefisien lintas. Hasil analisis korelasi menunjukkan bahwa peubah bobot per buah sebesar 0,771, panjang buah sebesar 0,585, dan diameter buah sebesar 0,525 berkorelasi positif dengan produksi per tanaman. Hasil sidik lintas menunjukkan perubah bobot per buah memperlihatkan pengaruh direct kepada produksi per tanaman, namun peubah panjang dan diameter buah memperlihatkan pengaruh indirect melalui bobot per buah sehingga meningkatkan produksi per tanaman
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