1,722,068 research outputs found
Changes in Soil Chemical Properties after Application of Oil Palm Empty Fruit Bunch on Two Soil Texture Classes.
No full textSoil macroporosity, physical properties and nutrient leaching after forest conversion to rubber and oil palm plantation in an Acrisol of Jambi, Indonesia
Full text linkSoil degradation is expected to continue as forest conversion into other land uses increases significantly. In Indonesia, Jambi is one of the main areas for the development of oil palm and rubber, whichare mainly converted from the forest. As a base for better management, we attempted to study macro-porosity in rubber and oil palm plantation, in comparison to secondary forests. Four landuse systems (secondary forest, jungle rubber, rubber plantation and oil palm plantations) in Bukit Duabelas, Sarolangun District, Jambi Province, Sumatera, were selected for this study. The number of macropores in vertical or horizontal planes and their related factors (root mass, litter thickness, % organic C, bulk density, water content at pF 0 and pF 2.54, aggregate stability) were measured within the soil profiles. Forest conversion to jungle rubber, rubber and oil palm plantation led to a decrease of macro-porosity in the soil profile, especially in the upper 50 cm. Macropores, both at vertical and horizontal planes in the secondary forest was significantly higher than other landuses. Horizontal macropores in jungle rubber were higher than rubber and oil palm plantation, but not the vertical macropores. Among the soil properties measured, litter thickness, coarse root dry mass (Ø >2 mm), mesopores and aggregate stability were closely associated with soil macro-porosity. However, macro-porosity in the soil profile was insignificantly correlated to soil bulk density and % organic C. Increasing the number of horizontal macropores resulted in higher nutrient leaching, especially K and Na
Soil Biochemical Properties and Nutrient Leaching from Smallholder Oil Palm Plantations, Sumatra-Indonesia
No full textThe study aimed to assess soil biochemical properties and nutrient leaching in palm oil plantation. The research was conducted in smallholder oil palm plantations which were located in Jambi Province - Indonesia. Nutrient leaching was determined by measuring nutrient concentration in soil solution bi-weekly and monthly in the frond stacked and fertilized areas; soil water samples were collected by using suction cup lysimeter. The result showed that the application of mineral fertilizer (e.g. NPK) and dolomite resulted higher base saturation, exchangeable Ca, and available P in the fertilized than frond stacked and inter row areas (p ≤ 0.05). Stacking palm oil frond increased the soil macro-porosity, hence decreased leaching of K, Mg, Na, P, and total Al in the frond stacked than in the fertilized areas. The lower leaching losses and the higher soil macroporosity in the frond stacked than in the fertilized areas indicated that either the water did not dilute nutrient in the soil due to bypass flow, or the nutrient release from mineralization did not surpass nutrient demand which is quickly uptaken by palm root. Proper soil management through synchronizing rate of fertilizer application with nutrient output or frequency of fertilizer application may potentially minimize leaching losses
PERBANDINGAN FRAME BERITA KASUS HOAKS PENGANIAYAAN RATNA SARUMPAET DALAM PERSPEKTIF IMPARSIALITAS
Full text linkRizki, Ikhtiar Utami Sri. 2019. “The Comparison News Frames of Hoax Ratna Sarumpaet in Impartiality Perspective”. Thesis (S1) Indonesian Literature, Culture Faculty of Diponegoro University Semarang. Adviser Drs. Suharyo, M.Hum. and Dra. Sri Puji Astuti,.M.Pd.
This research focus on frame comparison in perspective of impartiality. Object of this research the use of online media newspaper from okezone.com, viva.co.id, sindonews.com. The aim of this research : 1) to describe the comparison of online media frames okezone.com, sindonews.com, and viva.co.id in the case of RS persecution hoax, analysis by framing device of Gamson and Modigliani's models in the perspective of impartiality. 2) to describe audience understanding related to news discourse RS persecution hoax cases from online media okezone.com, sindonews.com, and viva.co.id.
The approach of this study was qualitative theory. The provision of data in this study was refer study using the method of simak and note techniques then followed by structured interview techniques.
The results of the analysis show that in the perspective of the impartiality of the news text okezone.com has not been able to show consistency as an impartial media, because okeazone makes 60% positive news frame, 20% neutral and 20% negative while viva.co.id and sindonews.com as countra media who making 60% negative news frames. In terms of audience understanding, the majority of the public has understood the news about the abuse of the hospital well and is not easily affected by media coverage. The case of the RS raises contra of the public. Words like, irony, liposuction, defending human rights can be inherent in the minds of the public.
Keyword: framing, impartiality, understanding of the audienc
Spatial variability surpasses land-use change effects on soil biochemical properties of converted lowland landscapes in Sumatra, Indonesia
No full textForest conversion to agriculture can decrease soil nutrient stocks overtime. However, inherent spatial variability in soil biochemical properties in converted landscapes could be high, and may supersede effects of land-use change on soil nutrient changes. Our aims were to assess changes in soil nutrient stocks with land-use change, and to quantify the proportions of spatial variability and land-use change effects on the overall variance of soil nutrient stocks. This study was conducted in Jambi Province, Sumatra, Indonesia in two distinct landscapes defined by the dominant soil texture and type: loam and clay Acrisol soils. In each landscape, four land-use types were examined: lowland forest and rubber interspersed in naturally regenerating forest (referred here as “jungle rubber”) as reference land uses and smallholder plantations of rubber and oil palm. In the 0–0.5 m soil depth of the reference land uses, the clay Acrisol had higher total N (660.1 ± 63.8–1074.2 ± 158.8 g N m− 2; P ≤ 0.05), exchangeable Ca (24.1 ± 5.7–80.6 ± 22.8 g Ca m− 2; P ≤ 0.06), Mg (4.3 ± 0.6–39.2 ± 16.3 g Mg m− 2; P ≤ 0.02), K (11.7 ± 0.7–34.7 ± 12.1 g K m− 2; P ≤ 0.06), extractable P (1.1 ± 0.1–2.6 ± 0.1 g P m− 2; P ≤ 0.001) and effective cation exchange capacity (ECEC; 11.4 ± 3.1–40.6 ± 11.0 cmolc kg− 1; P = 0.02), illustrating that clay content influenced soil fertility in these highly weathered soils. Compared to the reference land uses, the oil palm plantations had higher soil pH (4.2 ± 0.0–4.6 ± 0.1; P ≤ 0.04), base saturation (8.9 ± 1.6–6.5 ± 1.3%; P ≤ 0.07) and extractable P (0.8 ± 0.1–6.1 ± 3.2 g P m− 2; P ≤ 0.01) in the top 0.5 m depth, which was probably due to the legacy effect of biomass burning and fertilization. We were unable to detect significant effects of land-use change on other soil biochemical characteristics (i.e., ECEC, stocks of exchangeable bases, soil organic carbon (SOC), total N). Based on variance components analysis, a large proportion of the variance of these parameters was accounted by the variation among replicate plots (26–91%) rather than by land-use types (only 0–6%). Power analysis showed that the optimum number of replicate plots to detect land-use change effects on these parameters ranged from 5 to 7. Our results suggest that spatial variability must be represented in the experimental design in order to detect land-use change effects on soil nutrient changes through stratifying the area of inference (i.e., landscape or region) based on known drivers of soil fertility and determining the optimal number of experimental units
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
Optimalisasi Peran Sains dan Teknologi untuk Mewujudkan Smart City
Full text linkSmart city (kota cerdas) adalah kota yang masyarakatnya mampu mengelola sumber daya dengan efisien, dalam arti “mampu memaksimalkan investasi sumberdaya manusia, transportasi, dan infrastruktur teknologi informasi untuk meningkatkan pertumbuhan ekonomi dan kenyamanan hidup” (Caragliu, Del, & Nijkamp, 2009). Smart city memiliki enam karakteristik, yaitu smart economy, smart mobility, smart environment, smart people, smart living, dan smart governance (Albino, Berardi, and Dangelico, 2015). Smart economy adalah pengembangan ekonomi kota yang berorientasi pada upaya untuk menyejahterakan masyarakat melalui upaya meningkatkan kegiatan-kegiatan kewirausahaan, membangun dan meningkatkan semangat produktifitas, melakukan dan meningkatkan upaya-upaya promosi produk-produk lokal, dan melakukan inovasi budaya terkait dengan e-commerce dan e-bussinesss. Smart mobility terkait dengan upaya perbaikan dan peningkatan kualitas infrastruktur, yang lebih menekankan pada aspek aksesibilitas transportasi berbasis telekomunikasi dan informatika sebagai faktor utama untuk meningkatkan efisiensi dan daya saing sebuah kota. Smart living terkait dengan paradigma yang mengacu pada efisiensi, efektvitas, dan kepraktisan dalam gaya hidup. Smart people adalah infrastruktur sosial yang terdiri atas modal intelektual dan modal sosial yang sangat diperlukan smart city karena mereka memiliki kemampuan belajar sepanjang hayat, bersikap plural secara sosial dan etnis, fleksibel, kreatif, berfikiran terbuka, dan selalu terlibat dan berpartisipasi dalam kegiatan kemasyarakatan (Nam and Pardo, 2011). Smart governance atau tata kelola pemerintahan yang cerdas merupakan komponen smart city yang sangat penting karena merupakan muara inisiatif kebijakan pengembagan smart city. Aspek-aspek esensial dalam smart govenance antara lain adalah keterlibatan publik dalam pengambilan keputusan dan transparansi pemerintahan serta ketersediaan layanan publik (Ministry of Environment, Sustainable, Development, and Disaster, and Beach Management, 2015). Menurut Prihadi (2016) Optimalisasi Peran Sains dan Teknologi untuk Mewujudkan Smart City 3 standar smart city yang sedang dikembangkan di Indonesia mengacu pada standar internasional tersebut
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