1,720,957 research outputs found
Amelioration of Coal Post Mining Area In Promoting The Growth of Avocado (Persea Americana Mill.)
Full text linkThis study was aimed to obtain the composition of ameliorant that gives the best result in recovering several chemical properties of coal post mining area in reclamation as well as in promoting the growth of avocado in the area. The study was carried out in post mining area of PT Nan Riang from April to October 2017 using Experimental Method with Randomized Group Design consisting of 5 treatments with different composition of ameliorant, a1 = 1 kg composted chicken manure + limestone (0,50 x Al-dd) + 25 g biochar /plant, a2 = 2 kg composted chicken manure + limestone (1,00 x Al-dd) + 50 g biochar /plant, a3 = 3 kg composted chicken manure + limestone (1,25 x Al-dd) + 75 g biochar /plant, a4 = 4 kg composted chicken manure + limestone (1,50 x Al-dd) + 100 g biochar /plant dan a5 = 5 kg composted chicken manure + limestone (1,75 x Al-dd) + 125 g biochar /plant. The results showed that the treatment by ameliorant composition had real influence on the increase of the plant’s height, unreal influence on the increase of the plant’s diameter, real influence on the soil pH, and unreal influence on the soil organic-C content and cation-exchange capacity. Also, it can be seen from the DMRT 5% test that the best composition of ameliorant in promoting the plant’s height was at 4 kg composted chicken manure+ limestone (1,50 x Al-dd) + 100 g biochar /plant, while that in improving the soil pH was at 5 kg composted chicken manure + limestone (1,75 x Al-dd) + 125 g biochar /plant.This study was aimed to obtain the composition of ameliorant that gives the best result in recovering several chemical properties of coal post mining area in reclamation as well as in promoting the growth of avocado in the area. The study was carried out in post mining area of PT Nan Riang from April to October 2017 using Experimental Method with Randomized Group Design consisting of 5 treatments with different composition of ameliorant, a1 = 1 kg composted chicken manure + limestone (0,50 x Al-dd) + 25 g biochar /plant, a2 = 2 kg composted chicken manure + limestone (1,00 x Al-dd) + 50 g biochar /plant, a3 = 3 kg composted chicken manure + limestone (1,25 x Al-dd) + 75 g biochar /plant, a4 = 4 kg composted chicken manure + limestone (1,50 x Al-dd) + 100 g biochar /plant dan a5 = 5 kg composted chicken manure + limestone (1,75 x Al-dd) + 125 g biochar /plant. The results showed that the treatment by ameliorant composition had real influence on the increase of the plant’s height, unreal influence on the increase of the plant’s diameter, real influence on the soil pH, and unreal influence on the soil organic-C content and cation-exchange capacity. Also, it can be seen from the DMRT 5% test that the best composition of ameliorant in promoting the plant’s height was at 4 kg composted chicken manure+ limestone (1,50 x Al-dd) + 100 g biochar /plant, while that in improving the soil pH was at 5 kg composted chicken manure + limestone (1,75 x Al-dd) + 125 g biochar /plant
Agroteknologi Konservasi untuk Meningkatkan Kualitas Tanah dan Produktivitas Kentang di Kabupaten Kerinci Provinsi Jambi (Agrotechnology Conservation To Improve Soil Quality and Potatoes Productivity In Kerinci District, Jambi Provinci)
Full text linkPotato is a prime horticultural commodities for Kerinci District with production centers in the volcanic highlands of Kerinci Mount, Jambi Province. Less of physical and chemical properties of the soil, excessive fertilizers and pesticides chemical were caused potato low productivity anddeclined soil quality. The objectives of this research were to determine the potato agrotechnology that can improve soil quality and potato productivity in the Sub District of Kayu Aro, Kerinci District, Jambi Province. Potato agrotechnology were studied through small of experimental plots in Gunung Labu Village by a randomized block design with 13 treatments (agro-potato : ridges across the slope, a quality seeds, dose of lime, manure and chemical fertilizers according to the recommendations provided). Data collected include before and after of treatment of soil properties and productivity of potato. Results of the research showed that planting potatoes in ridges across the slope with 0.5 tons of Dolomite lime, 10.0 tons of manure, 150.0 kg of Urea, 150.0 kg of ZA, 25.00 kg of SP-36 and 20.00 kg KCl per hectare were sufficient to obtain optimal productivity of potato (39.52-37.0 kg/plot, equivalent 32.93-30.91 t/ha) and improved soil chemical properties of Andisol Gunung Labu Village (especially pH, base saturation and exchangeable bases) in the Western Sub District of Kayu Aro, Kerinci District .Key Words: Soil quality, agrotechnolog
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
Geologi dan Kestabilan Lereng dalam Pemetaan Zonasi Longsor di Desa Seberang dan Sumur Gedang, Kecamatan Pesisir Bukit, Kota Sungai Penuh, Jambi
Full text linkLongsor terjadi diakibatkan kestabilan lereng yang terganggu maka gerakan tanah (longsoran) akan terjadi dan dapat menimbulkan kerugian besar bagi masyarakat di sekitarnya. Kota Sungai Penuh cecara fisiografis berada di tepi bagian muka Lempeng Benua Asia yang berbenturan dengan Lempeng Samudera Hindia mengakibatkan sering dilanda bencana geologi. Kecamatan Pesisir Bukit merupakan daerah rawan akan potensi gerakan tanah longsor berdasarkan peta perkiraan gerakan tanah longsor untuk periode bulan Januari hingga Februari 2018. Penelitian ini bertujuan untuk memetakan zonasi longsor daerah penelitian berdasarkan kestabilan lereng dari data lapangan dan laboratorium. Metode penelitian menggunakan metode survei dan observasi lapangan. Hasil penelitian ini menunjukan daerah penelitian dibagi menjadi zona rendah (stabil), menengah dan tinggi (labil) berdasarkan ketentuan PVMBG. Zona berpotensi rendah dapat ditemukan adanya tanah longsor, namun ditemukannya tanah longsor ini jarang, namun dapat terjadi jika adanya faktor yang memicu longsor. Zona berpotensi menengah menandakan bahwa pada daerah tersebut ditemukannya kejadian longsor cukup banyak, merupakan daerah berbukit, tutupan lahan dengan curah hujan cukup tinggi. Sedangkan zona berpotensi tinggi menandakan daerah sangat berpotensi longsor, umumnya ditemukan pada daerah lereng terjal dengan intensitas curah hujan tinggi dan bencana tanah longsor pada daerah ini akan sering terjadi
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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