1,720,956 research outputs found
EFEK SISA KOMPOS SAMPAH KOTA DENGAN BERBAGAI TAKARAN PUPUK BUATAN TERHADAP PERUBAHAN BEBERAPA SIFAT KIMIA REGOSOL DAN PRODUKSI TANAMAN JAGUNG SEMI (Baby Corn)
Get PDFA pot trial about residue effects of compost and commercial fertilizer on Chemical Characteristics of Regosol and Production of Baby Corn for the second planting time. This research was conducted at Greenhouse of Agriculture Faculty and P3IN Laboratory, Andalas University from August to December 2006. Lettuce was the first plant planted on the pot, then it was continued with Baby Corn. This experiment was arranged based on 3x5 Factorial Randomized design with three replications. The first factor was compost; 0 ton/ha, 5 ton/ha, and 10 ton/ha. The second factor was commercial fertilizer: 0%, 25%, 50%, 75%, and 100% of recommendation. Based on the research, it was found that the residue of residue interaction with fertilizer influenced to the growth and yield of Baby Corn for the second planting time. From the statistical analysis of the result, it cwas concluded that 5 ton compost/ha (20g compost/pot) was able to increase the chemical charesteristics of Regosol, they were pH H2O, KTK, C-organic and N-total. Whereas for pH KCL, the available-P and basic cations, its valueable measure was started from 5 ton/ha ( 20g/pot). For the analysis of plant in the concentration of N and P, it was taken from the treatment of 4 ton/ha (40 g/pot) by using 100 % fertilizer.Key word : The Residue Effect of Manure</jats:p
EFEK SISA ASAM HUMAT DARI KOMPOS JERAMI PADI DAN PENGELOLAAN AIR DALAM MENGURANGI KERACUNAN BESI (FE) TANAH SAWAH BUKAAN BARU TERHADAP PRODUKSI PADI
Get PDFFe toxicity on recent ricefield has been common problem in ricefield management to increase rice productivity. Adding organic matter like humic acid from any source (such as hay residue compost) and water management (intermitten flooding and continue flooding) can reduce Fe toxicity and it will be able to increase rice yield in one plant season. But how about in second plant season, this research will found effect of adding humic acid from hay compost residue and water management. The objective of this research was to study the interaction of hay compost humic acid residue effect and water management on Fe abundant and nutrient uptake and rice yield in recent ricefield. This research has done by split-split plot design 2 x 4. The main plot which was treatment of water management were permanent flooding and intermitten (P1 and P2). And the split plot which was humic acid treatments were Ao = 0 ppm (0 Kg humic acid /Acre), A1= 200 ppm (400 Kg humic acid/A), A2= 400 ppm (800 Kg humic acid/A), A3 = 600 ppm (1200 Kg humic acid /A). Data analysed by statistical methode, if the treatments were significant to be continued by Duncan 05 % analysis. The result has obtained of this research which was Eh value of soil in flooding and intermitten was decrease in every week because treatment of humic acid in first season. The content of Fe2+ in soil was increase in every week until the 8th week. Value of soil pH until 8th week flooding was increase, and caused P available and P potencial were increase too. Plant growth and yield of rice in second season not better than first season, and for intermitten flooding caused better plant growth and yield of rice. Keyword : Fe Toxicity, Humic Acid, water management, Recent Ricefield</jats:p
PENGARUH PENGOLAHAN TANAH DAN PEMBERIAN MULSA ORGANIK TERHADAP PERUBAHAN BEBERAPA SIFAT KIMIA TANAH PSAMMENT DAN HASIL JAGUNG MANIS (Zea mays Saccharata Sturt)
No full textA research about effect of soil managment and organic mulch application on soil physical properties of psamment and conr production was conducted in Korong Muaro, Nagari Sunur Kecamatan Nan Sabaris Kabupaten Padang Pariaman, as well as in soil laboratory, Agriculture Faculty, Andalas University Padang. This research was done from April – October 2009. The objective of the research was to identify interaction effect between soil cultivation and organic mulch application on chemical properties of psamment and production of sweet corn. This research was designed in two factors: 3 x 4 with three replications. The first factor was soil cultivation which consisted of 3 levels (Po = No-till, P1 = Minimum tillage, P2 = Conventional till). The second factor was organic mulch application, which consisted of four levels: Z = without mulch addition, T = Titonia for 8 ton DW/ha, K = Chromolaena for 8 ton DW/ha, J = straw 8 ton DW/ha. The result showed that soil cultivation combined with rice straw mulch application could increase N, P, K elements in soil. Soil N content increased from 0,17 % to 0,28 %, avail-P from 52,57 ppm to 88,60 ppm, and K-exch from 0,64 me/100g to 2,35 me/100g, however, minimum tillage gave the highest yield which was 7,68 ton weight of corn seeds + the stalk /hektar, and rice straw mulch showed the highest among the organic mulch applied, which was 8,85 ton/ha.Keywords: Soil cultivation, organic mulch, psamment, sweet corn</jats:p
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
PENGARUH PENGELOLAAN AIR TERHADAP KONSENTRASI BESI (Fe) PADA SAWAH BUKAAN BARU
Get PDFRecently rice field in Ultisol has some problems, the most important thing is high concentration of Fe that can be toxic to the rice growth. The objective of this study was to determine the best water management to reduce concentration of Fe in recently rice field. The experiment was designed in completely randomized design with seven treatments and three replicates. The treatment consisted of continous water-logged, 1 week water-logged – 1 week dried, 2 weeks water-logged – 2 weeks dried, 3 weeks water-logged – 3 weeks dried, 1 week dried – 1 week water-logged, 2 weeks dried – 2 weeks water-logged, 3 weeks dried – 3 weeks water-logged. The results showed that the water management with water-logged and dried the soil could reduce Fe concentration about 720 – 1882 ppm. The best water management to reduce Fe concentration was 3 weeks water-logged – 3 weeks dried with Fe concentration in the soil was 376 ppm.
Key words : Water management, Iron, recently rice fiel
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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