bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pengaruh Pemupukan N dan Frekuensi Pemangkasan Tajuk pada Aspek Agronomis dan Hasil Tanaman Ubi Jalar (Ipomoea batatas (L.) Lam.) var. Kretek
Authors: Suminarti Nur Edy 
Published: January 2017

Penelitian yang bertujuan untuk mendapatkan informasi tentang pemupukan N dan frekuensi pemangkasan tajuk yang tepat pada tanaman ubi jalar (Ipomoea batatas (L.) Lam.). penelitian dilakukan di Kebun Percobaan Universitas Brawijaya, di Desa Jatikerto, Malang. Rancangan perlakuan yang digunakan adalah Petak Terbagi, dosis pupuk N ditempatkan pada petak utama, terdiri dari 4 taraf : (1) tanpa dipupuk N, (2) dipupuk 67,5 kg N ha-1, (3) dipupuk 135 kg N ha-1 dan (4) dipupuk 202,5 kg N ha-1. Pemangkasan tajuk ditempatkan pada anak petak, terdiri dari 4 macam : (1) tanpa dipangkas, (2) dipangkas 1 kali, (3) dipangkas 2 kali dan (4) dipangkas 3 kali. Pengumpulan data dilakukan secara destruktif meliputi luas daun, masa luas daun, panjang umbi, diameter umbi, bobot umbi per tanaman dan indeks pembagian. Uji F taraf 5% digunakan untuk menguji pengaruh perlakuan, sedangkan perbedaan diantara perlakuan didasarkan pada nilai Duncan taraf 5%. Hasil penelitian menunjukkan terjadi interaksi nyata pada luas daun, masa luas daun dan bobot umbi per tanaman. Luas daun dan masa luas daun tertinggi umumnya didapatkan pada pemupukan N dosis 202,5 kg N ha-1 dengan tanpa maupun dengan pemangkasan tajuk 1 kali. Bobot umbi per tanaman tertinggi didapatkan pada tanaman yang diberi pupuk N dengan dosis 135 kg N ha-1 dan pemangkasan tajuk 1 kali. A field reaserch that aimed to get the appropriate of N application and frequency of topping was conducted in the experimental field of Brawijaya University, located in Jatikerto village, Malang. The experimental treatments consist of four levels of N (0 ; 67.5 kg N ha-1, 135 kg N ha-1 and 202.5 kg N ha-1) and four levels frequency of topping (without topping, 1, 2, and 3 of topping). These treatments were arranged in a split plot design; N application in the main plot and frequency of topping in the subplot with three replications. Data was collected destructively including component of growth, component of yield and plant growth analysis. F test at 5% is used to determine the effect of treatments, while the average difference between treatments was referred to Duncan value at 5%. The result showed there were significantly interaction between N application and frequency of topping on component of growth and weight of tuber per plant. Combination of N application dosage 202.5 kg ha-1 and non or once topped had resulted the highest of leaf area and leaf area duration. While the highest of weight tuber per plant was obtained on N dosage 135 kg ha-1 and topping one times.
Pengendalian Alternatif Hama Serangga Sayuran dengan Menggunakan Perangkap Kertas
Authors: Hakim Lukmanul , Surya Erdi , Muis Abdul 
Published: January 2017

Sayuran merupakan bahan pangan yang sangat dibutuhkan manusia karena mengandung serat dan sejumlah vitamin dan mineral. Untuk memenuhi kebutuhan masyarakat akan sayuran banyak kendala yang dihadapi petani, salah satunya adalah gangguan hama serangga. Untuk mengendalikan hama serangga telah banyak pula cara yang dilakukan oleh petani. Penelitian ini bertujuan untuk menguji model perangkap serangga yang terbuat dari media kertas dan lampu warna. Warna yang dicobakan dalam penelitian ini terdiri dari merah, kuning, dan hijau. Penelitian ini telah dilakukan dari bulan Juli sampai dengan Agustus 2016 di kebun percobaan Sekolah Menengah Kejuruan Pembangunan Pertanian (SMKPP), Kecamatan Lembah Seulawah, Kabupaten Aceh Besar, Provinsi Aceh. Objek penelitian adalah tanaman jagung. Metode penelitian menggunakan RCBD dengan 3 perlakuan dan 4 ulangan. Variabel pengamatan populasi serangga yang terperangkap pada media kertas dan lampu warna. Hasil penelitian menujukkan tangkapan serangga tertinggi pada kertas dan lampu warna kuning, kemudian diikuti kertas dan lampu warna hijau dan merah. This study aimed to test the two models of trap insect, which were made from trapping paper media and colored light. The tested colors are red, yellow, and green, while the colors of light consist of red, yellow, and green. This study conducted from July to August 2016 at the experimental field of "Hight School Vocational Agricultural Development” Seulawah Valley Districts, Large Districts of Aceh, Aceh Province using the corn crop as the object. The research method approached in Randomized Completely Block Design (RCBD) with 3 treatments and 4 replications. The variable observation was insect populations trapped on paper media and colored light. The result showed that the highest insect population was on paper and yellow color light, the medium population was on the green paper, and the lowest population encountered on red paper.
Studi Potensi Alelopati Ekstrak Rimpang Temulawak (Curcuma xanthorriza Roxb.) pada Rumput Teki (Cyperus rotundus) dan Perkecambahan Kedelai (Glycine max)
Authors: Nihayati Ellis , Karyawati Anna Satyana , Puspasari Latifah Diah , Azizah Nur 
Published: January 2017

Ekstrak rimpang temulawak (Curcuma xanthorriza Roxb.) memiliki sifat alelopati yang berasal dari senyawa metabolit sekunder. Senyawa metabolit tersebut menghambat pertumbuhan tanaman sehingga dapat dimanfaatkan sebagai bioherbisida. Rumput teki ialah gulma yang sering tumbuh pada lahan budidaya tanaman kedelai, sehingga perlu dikendalikan. Penelitian ini bertujuan untuk mempelajari potensi ekstrak rimpang temulawak pada rumput teki dan mendapatkan konsentrasi ekstrak rimpang temulawak yang dapat menekan pertumbuhan rumput teki tetapi tidak menghambat perkecambahan kedelai. Penelitian dilaksanakan pada bulan Maret hingga April 2015 yang terbagi dalam tiga tahap penelitian. Penelitian pertama dilaksanakan di Laboratorium Sumberdaya Lingkungan menggunakan Rancangan Acak Lengkap. Penelitian kedua dan ketiga bertempat di Rumah Kaca Fakultas Pertanian Universitas Brawijaya, masing - masing menggunakan Rancangan Acak Lengkap dan Rancangan Acak Kelompok. Penelitian ini terdiri atas 6 perlakuan yaitu P0 (kontrol), P1 (konsentrasi 20%), P2 (konsentrasi 40%), P3 (konsentrasi 60%), P4 (konsentrasi 80%), P5 (konsentrasi 100%) dan 4 kali ulangan. Hasil penelitian menunjukan bahwa konsentrasi 20% ekstrak rimpang temulawak mampu menekan pertumbuhan tunas rumput teki. Peningkatan konsentrasi ekstrak rimpang temulawak hingga 60% mengakibatkan pertumbuhan tanaman rumput teki tertekan. Pengaruh ekstrak rimpang temulawak pada penghambatan perkecambahan terlihat pada perlakuan konsentrasi 60%. Rhizome extract of temulawak (Curcuma xanthorriza Roxb.) has residue properties derived from secondary metabolites. The metabolites inhibit the growth of plants, and it can be used as bioherbicide. Cyperus rotundus is a common weed that grows in soybean cultivation and it needs to be controlled. This research aimed to study the potential of temulawak rhizome extract on Cyperus rotundus and get temulawak rhizome extract concentration that can suppress the growth of Cyperus rotundus without inhibiting the germination of soybeans. The experiment was conducted on March to April 2015 and divided into three experiments. The first experiment was conducted in the Laboratory of Environmental Resource using completely randomized design. The second experiment and third experiments placed in Greenhouse UB Faculty of Agriculture, each using completely randomized block design and randomized block design. This study consisted of six treatments that were P0 (control), P1 (20% concentration), P2 (40% concentration), P3 (60% concentration), P4 (80% concentration), P5 (100% concentration) and four replications. The results showed that 20% concentration of temulawak rhizome extract can suppress Cyperus rotundus. Increasing concentration of temulawak rhizome extract up to 60% suppress growth of Cyperus rotundus. Temulawak rhizome extract significantly inhibited germination of soybeans at concentration of 60%.
EVALUASI KEGIATAN AKUAKULTUR DI KOLONG PASCA TAMBANG : ANALISIS PENCEMARAN AIR KOLONG
Authors: Prasetiyono Eva 
Published: January 2017

Ex-tin mining lakes are commonly used by many people in Bangka Island for fish farming activities. The water logs of post mining lakes have been used for fish farming activities. We hypothesized possibly environmental pollution related to the water quality. This paper aimed to evaluate fish farming activities by the local communities using the waterlogs of post mining lakes. The evaluation was based on heavy metals extent in the water using survey method with purposive sampling in order to determine which extin mining lakes would be feasible for aquaculture activities. The data of the content of heavy metals and water qualities were analyzed using the method of Pollution Index (PI). According to the age of mining lakes, the five ex-tin mining lakes which has been observed. The results showed one new aged, two middle aged, and one old age; meets the quality standard eligibility for fish farming activities, while the middle aged was low polluted. The age of ex-tin mining lakes not affected nor the extent of the pollution levels or water qualities.Keywords : ex-tin mining, lakes, aquaculture, water qualities, pollution index, fish
Pola Gender dalam Peternakan Babi Pada Peternak Etnis Arfak, Papua Barat
Authors: Iyai Deny A. , Saragih Desni T.R. 
Published: January 2017

<p class="Default">The aim of this research was study of women and man concerning on pig family farming on Arfak ethnic, West Papua. Descriptive study was done in agro-ecological zones, i.e. coastal, lowland and highland. A 22 pig farmers were involved and interviewed subsequently, 10 hh, 7 hh and 5 hh. The finding of this research was that pig production level of the women was smaller than man in pre-production. Although increases in production level till pasca production. Man pig farmers were still dominant keeping the animals. However, decision was done democraticly. Level of income kept by women and men were in the ranges of Rp 2 million to Rp 6 million.</p><p> </p><p>Keywords: gender, livestock agro-ecology, pre-production, production, pasca-production, Arfak.</p>
Guest Editorial: How To Thrive in a Downturn
Authors: Hite J. Roger , Howes C. Susan 
Published: January 2017

Guest editorial
The industry is in one of its periodic downturns. Jobs are uncertain or scarce. Profitability is challenged. Bankruptcy looms. Projects are being canceled. Deals are dropped or delayed. It seems there is bad news everywhere. So how do we survive in this environment? And, more importantly, how do we go from surviving to thriving?
The leadership of the SPE Gulf Coast Section (GCS) has launched a new initiative called “Members in Transition” with the aim of providing support, advice, and best practices for thriving in a downturn. The key principles are the following:
1. Be innovative. Plan A is often not available these days. We have to look for alternatives. As an individual, whether you are a prospective graduate with an ambition to work for a major producer or a service provider, or have just lost your job, consider all alternatives.
In addition to your first choices, also look for jobs in marketing, finance, regulation, midstream, or downstream. Your expertise is in the petroleum industry, as well as in petroleum engineering. Your skills are much broader than you might think.
Extend your education by taking advanced courses or by earning a new degree. This will be time well spent preparing for the future. Explore the educational opportunities available from your SPE section.
Start your own business. This could create a rewarding new career path. In partnership with the Houston Technology Center, the SPE GCS is establishing an Ideas Launch Pad program to match members’ ideas with angel investors. Entrepreneurs will need realistic financial projections and need to be able to tell the business story in a convincing way to potential investors. Employers value entrepreneurial skills. These business skills will serve you well if you eventually decide to move to a corporate role. Creating a great business story (Fisher 2014) for investors will help you develop skills that are useful for moving projects forward when you are hired by a company in the future.
As a company, your previous business plan may no longer be viable in the current price environment. Take a clean sheet of paper, throw out all past preferences and prejudices, and start afresh. Develop a new plan that works in today’s environment.
Now is the time to explore new technologies and new processes that improve performance. In the January issue of JPT (Rassenfoss 2016), the SPE technical directors talked about innovations needed for “Doing Better in Bad Times.”
2. Be curious. To come up with new ways of doing things, you need new ideas. To get new ideas you need imagination. This is a good time to look for ideas from other industries.
3. Cut costs. When prices are low, it is important to cut costs, whether you are an individual or a company. Now is the time to be diligent, even ruthless, with cutting costs. In the end, you will be more secure and better prepared when good times return.
Novel Proppant Surface Treatment for Enhanced Performance and Improved Cleanup
Authors: Carpenter Chris 
Published: January 2017

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 175537, “Novel Proppant Surface Treatment Yields Enhanced Multiphase- Flow Performance and Improved Hydraulic-Fracture Cleanup,” by Terry Palisch, Mark Chapman, and Joshua Leasure, SPE, Carbo Ceramics, prepared for the 2015 SPE Liquids-Rich Basins Conference—North America, Midland, Texas, USA, 2–3 September. The paper has not been peer reviewed.
This paper describes the development and testing of a new proppant designed to exhibit a neutrally wet surface. The modified surface does not have a preferential affinity for oil, gas, or water and therefore will not promote the preferential entrapment of any phase within the proppant pack. This proppant technology and the results described in this paper should be useful for completions, production, and the work of reservoir engineers dealing with hydraulically fractured wells, particularly in oil- and condensate-rich reservoirs that are particularly challenged by multiphase flow.
Introduction
A new proppant technology has been developed whereby a thin chemical coating is permanently applied to the ceramic proppant surface. The coating is very thin, approximately 0.13 Μm, or less than 1% of the thickness of the resin on a standard resin-coated proppant grain. The coating is applied to every grain, after the manufacture of the base substrate. It can be applied to any size and type of ceramic proppant, including low-, intermediate-, and highdensity ceramic proppant.
The key attribute of the coating is its ability to modify the surface wettability of the proppant grain to a neutral state. Because the coating is applied to every proppant grain, the entire proppant pack exhibits a neutral-wettability surface. When a surface is neutrally wet, the contact angle of the wetting fluid is 90°. For this contact angle, the capillary pressure in the proppant pack is eliminated. A visual test was performed to illustrate the impact of eliminating capillary forces in the presence of the new coating (Fig. 1). Tubes of the 40/80 low-density ceramic (LDC) proppant were assembled with screens at the bottom that would allow water to enter while keeping the proppant in place. When the tube containing uncoated standard proppant was placed in the water, the capillary forces in the proppant pack caused the water to be drawn up into the tube. However, when the same process was repeated with surface-modified proppant, the water level was not drawn up inside the tube.
Technology Focus: Offshore Drilling and Completion (April 2016)
Authors: Rylance Martin 
Published: January 2017

Technology Focus
Cross-discipline solutions? Unified (oil) field theory? We will not expound on quantum theory here; we will discuss unified oil fields, cross-discipline integration, cooperation, and solution deployment. Well construction and operation is a serial piece of business, and, while different disciplines manage the various pieces of the business well, the decisions made at any stage can have implications later in the drilling, completion, and production phases of the well.
This is a timely subject for two reasons. First, with low oil prices, we need the maximum efficiency that we can achieve. Second, a potentially emerging challenge in completions is that a drilling solution may be affecting a completion solution. Across the globe, there is increasing evidence that the widespread use of stress cage (a very good drilling solution for depleted formations) may be affecting the ability to deploy fracturing and frac-pack solutions efficiently. The growing evidence consists of higher breakdown pressures, more near-wellbore friction loss, an increasing early-screenout frequency, and even long-term effects on productivity. While it looks as though this interaction has been identified early, it is now imperative that we work across all the disciplines involved—drilling, completions, and production—to ensure that appropriate steps are taken to ensure that the well can be drilled and completed efficiently.
Therefore, this month, I include a number of papers for further review that clearly demonstrate the highest levels of cross-discipline teamwork and that have developed solutions that improve efficiency across the scope of a well’s operations. These papers all relate to some extent to the deployment of more complex completions, requiring cabling, control lines, and flat packs. The success of these approaches can be achieved only in cooperative environments. Requiring alignment of a range of different subdisciplines and roles, positive outcomes rely heavily on ensuring that the process is fully integrated.
Many of us work in strong functional environments, where all too easily we can deploy solutions that have the potential for repercussions on other aspects of well design, construction, completion, and performance. It is always worth taking a moment during the planning phases of technology and solution deployment to consider the breadth of effects that your solution may have on others. JPT
Recommended additional reading at OnePetro: www.onepetro.org.
SPE 176268 First Large-Bore Expandable-Liner-Hanger Deployment Offshore Gabon: Case Study by John McCormick, Halliburton, et al.
SPE/IADC 173060 Design, Qualification, QA/QC, and Operational Performance of Completion Fluid, Reservoir Drill-in Fluid, and Breaker—Tamar, Offshore Israel by John Healy, Healy Energy, et al.
OTC 26284 Successful Application of Drilling-Optimization Methodology and Integrated Solutions in a Presalt Well by Marcus Pinheiro, Halliburton, et al.
In-Well Dual Canned ESP Completion Test To Validate Safe Deployment in Deep Water
Authors: Wilson Adam 
Published: January 2017

This article, written by Special Publications Editor Adam Wilson, contains highlights of paper OTC 26002, “Testing In-Well Dual Canned ESP Completion System To Validate Safe Deployment in Deep Water: A Collaborative Effort To Understand Surface and Downhole Requirements,” by Kim Tijerina, Baker Hughes, and Carlos Pardo and Andy Hope, Chevron, prepared for the 2015 Offshore Technology Conference, Houston, 4-7 May. The paper has not been peer reviewed.
Deepwater and ultradeepwater completions use numerous hydraulic control lines for control and actuation of downhole equipment. Incorporating a completion system with an in-well lift such as electrical submersible pumps (ESPs) increases the number of electrical lines needed. This paper discusses the planning and execution of a stack-up test (SUT) to determine whether a completion system incorporating a dual canned ESP system with multiple control lines can be deployed efficiently and safely in a deepwater, high-pressure/high-temperature (HP/HT) environment.
Introduction
Lower Tertiary Play Characteristics and Challenges. Fields in the Lower Tertiary play, also known as the Paleogene, have low porosity (15–25%) and low permeability (&lt;10 md), which reduce the amount of oil that can be recovered without assistance. In addition, Lower Tertiary water depths range from 5,000 ft to more than 10,000 ft; reservoirs are deeper than 26,000 ft; pressures range from 25,000 to 30,000 psi; and temperatures can be higher than 300°F, further complicating production. The Wilcox formation lies in the Lower Tertiary and is divided into the Upper, Middle, and Lower Wilcox on the basis of each section’s stratigraphy.
The Lower Tertiary formations can produce large volumes of oil and gas, assisted by high pressure within the formation. However, as the reservoir pressure depletes, adequate production rates cannot be maintained without effective reservoir-pressure maintenance or artificial lift. In shallow-water wells, gas lift assistance has been used and proved effective for production but requires a large gas supply and infrastructure to support production.
Another proven technique used for fluid-lift assistance is an ESP system, normally implemented when a well is worked over and recompleted.
Placing an in-well ESP artificial-lift system within the primary completion enhances production during the well-pressure- depletion period, preventing the need of at least one workover to install the ESP and preventing deferred production while waiting for a capable rig to perform the workover.
In 2009, considerations for in-well lift completions moved forward with conceptual development of a dual canned ESP system in collaboration with an operator. Although dual ESPs have been run before, the use of a dual canned ESP system in the Lower Wilcox requires a significant number of additional completion components that require additional control lines for their operation.