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Andy Eka Saputra
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Kampus Politeknik Negeri Lampung Jalan Soekarn Hatta No. 10 Raja Basa Bandar Lampung
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TEKTAN
Published by Politeknik Negeri Lampung
ISSN : 20851278     EISSN : 27453472     DOI : https://doi.org/10.25181/tektan
Core Subject : Agriculture, Social, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Engineering Environmental Science Mechanical Engineering
Jurnal Tektan merupakan salah satu jurnal di Politeknik Negeri Lampung yang  menampung hasil penelitian berupa artikel ilmiah yang berkaitan dengan Ilmu Keteknikan Pertanian, Mekanisasi Pertanian, Teknik Kimia, Teknik Sumberdaya Lahan dan Lingkungan,dimana artikel tersebut belum pernah dipublikasikan. Jurnal TekTan di terbitkan oleh Unit Penelitian dan Pengabdian Kepada Masyarakat Polinela Unit 3x dalam setahun. Jurnal Ilmiah Teknik Pertanian Ini diterbitkan oleh Unit Penelitian dan Pengabdian Kepada Masyarakat Polinela Sebagai Wadah Bagi Dosen, Mahasiswa dan PLP untuk mempublikasikan karya penulisannya. Jurnal ini sempat mengalami Jeda Pengaktifan Selama 3 tahun mulai terbitan 2016 sampai Agustus 2019, hal ini disebabkan karena kekosongan tim pengelola Jurnal. Kemudian dengan manajemen pengelolaan yang baru maka diterbitkan kembali untuk volume 11 No. 3 pada tanggal 16 Desember 2019
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 6 Documents
 1 
Search results for , issue "Vol 6 No 2 (2014)" : 6 Documents clear
Desain Irigasi Tetes Bawah Permukaan Berdasarkan Konduktivitas Hidraulik Tanah untuk Tanaman Hortikultura Muhammad Idrus; Erie Maulana
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 2 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i2.887

Abstract

Subsurface drip irrigation is designed base on the soil hydraulic conductivity in order to water drip out from emitter not overflow to soil surface so that application of water irrigation more efficent.   The objectives of the research were (1) To compose matematic equation for determining diameter of hole emitter sub surface drip irrigation base on soil hydraulic conductivity so that emitter discharge not more than soil hydraulic conductivity; (2) To constract the physic model of subsurface drip irrigation conform with the design in this research; (3) To test performances design result of the subsurface drip irrigation at the research station with plant indicator is chilly with 4, 6, 8, and 10 days irrigation interval. The result of the research showed that the diameter of hole emitter of subsurface drip irrigation base on the equation /2.4/ for clay, sandy loam, and sand textures are 3,3; 4,7; and 6,6 mm respectively without water overflow from hole emiter to the soil surface.The irrigation interval of 6 days by using subsurface drip irrigation until day old of chilly 50 days after planting gave production 0,561 kg plant-1 and economical benefit per unit of water.  Water productivity of chilly with 6 days  irrigation interval is very high of 6.56 kg m-3 of water.    Keywords: subsurface drip irrigation, hole diameter emitter, chilly, irrigation interval.
Studies on the Use of Nondestructive Method Using VIR-NIR Spectroscopy for Color Determination of Blood Oranges Flesh Diding Suhandy
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 2 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i2.888

Abstract

In this research, the potentiality of using NIR spectroscopy and chemometrics for nondestructive determination of blood oranges flesh was investigated. Spectra of intact blood oranges fruit were acquired using a VIS-NIR MMS1 portable spectrometer in absorbance mode. The RGB of blood oranges cut flesh was measured using image processing software.  The calibration and validation models were developed using PLS regression using original spectra. The calibration results showed that the developed calibration models were promising with correlation r=0.82 for red component (R) determination and r=0.81 for green component (G) determination, respectively. Keywords: blood oranges, NIR spectroscopy, RGB color, absorbance mode, nondestructive method
Hydraulic Design of Way Kandis River Embankment (Case Studies at the Lampung State Polytechnic River Section) Bagas Arya Hermuda; Gunawan Manihuruk; Realis Prasetyawan; Didik Kuswadi
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 2 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i2.889

Abstract

Flooding is a condition where there is overload of water in the channel or inhibition of water flow to the drainage channel, so the overflow of water inundated the surround area. Embankment is defined as a waterwork which it was used to reduced or prevented the overtoping of water. The purpose of this study were (1) determine the plan flooding discharge of Way Kandis river, (2) made the hydraulic design of Way Kandis River embankment segment Polinela. Steps of research activities were the preparation, survey and topographical measurements, collected hydrological data,  processed of topography and hydrology data, counted the design maximum discharge, design of embankment river. The results showed that (1) the design discharge of  return period 25 years was 29.13 m³/s, (2) the result of hydraulic design of Way Kandis River embankment at the POLINELA segment were the design channel capacity by 30.18 m3/s, the base width of the channel (b) by 5.1 m, the depth of flow (h) by 1.7 m, the slope embankment (1:m) by 1:2, height of freeboard by 0.5 m. Keywords: hidraulic design of embankment,  plan of  flooding discharge, design of channel capacity
Perencanaan Sistem Penyediaan Air Minum (SPAM) Pedesaan Dusun IV Desa Sumberejo Kabupaten Tanggamus Dwi May Juwita; Repinka Cornelia; Aqmal Satrio Dirgantara; Suprapto Suprapto; Ismadi Raharjo
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 2 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i2.890

Abstract

Fresh water is a basic need for human, so is  to be normal if the water sector gets priority in the handling and fulfillment. The springs are located in Dusun  Sumberejo IV should be able to meet the water needs of the local community. The purpose of this study was: (1) identify potential sources of raw water (water) in Dususn Sumberejo IV, (2) calculate the number of people that will be served as well as the need for clean water, (3) designing the layout and capacity of the reservoir, (4) determine the appropriate piping standards for Rural Fresh Water Supply System (SPAM), and (5) predict the draft budget piping. The method used is the discharge measurements, measurements of topography, socio-economic survey, the calculation of water requirements, head loss effective calculation and Budget Plan (RAB), whereas for hidraulic analysis using Epanet program. Results of fresh water supply planning is done for rural population projections to 2020 the number of 491 people, need for fresh water in the Dusun Sumberejo IV 0.32 liters/sec, discharge available in the spring Sumberejo is 0.35 liters/second then the discharge is still sufficient for the water needs until the year 2020. From the measurement results obtained topographic maps + 50.42 m height difference by elevation above sea level on the Bench Mark (a point of reference, the location of the source of raw water springs) + 446 m above sea level and at the end point measurement (area of service farthest) +399.57 m above sea level, so the system can distribuasi to the service area using gravity. The results of the hydraulic analysis using EPANET used PVC pipes with various diameters ranging from 12.5 to 50 mm with a length of 4876 meters and its accessories (accessories). Based on these forecasts Rural SPAM development requires an investment of around Rp. 89,000,000.00, then the system when the service is expected to last for 25 years as well as in the development of investment in the form of loans with mortgage interest (soft loans) amounted to 6% of the obtained water price per m3 in Dususn IV Sumberejo IV  around Rp. 1450.00/m3. Keywords: rural SPAM, gravitasi system EPANET
Analisis Hidrologi untuk Pendugaan Debit Banjir dengan Metode Nakayasu di Daerah Aliran Sungai Way Besai Repinka Cornelia; Suprapto Suprapto; Kelik Istanto
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 2 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i2.891

Abstract

Way Besai is one tributary Way Kanan located in West Lampung and Way Kanan  Regency, Lampung Province. Way Besai riverbanks downstream of the low areas during the rainy season in some locations overflowing river submerged. This condition is exacerbated by the destruction of the river catchment Way Besai resulting in flooding during the rainy season. The purpose of this study to estimate precipitation plan, and estimate the flood discharge plan using Nakayasu. Activities undertaken include the determination of the maximum daily rainfall, creation of Thiessen polygons, calculation of the maximum average rainfall, the calculation of the frequency distribution, determination of the suitability of the Chi Square test the method Gumbel and Log Pearson III method, the calculation of the design rainfall distribution, as well as the calculation of flood discharge by using Nakayasu method. The results of the calculation of rainfall plan (after the Chi Square test) were obtained for 10-year return period of 83.46 mm/day. Return period of 25 years at 105.41 mm/day. 50-year return period of 123.70 mm/day. Flood discharge plan obtained by unit hydrograph method Nakayasu of 244.15 m3/sec for a period of 10years, 308.35 m3/sec for 25-year return period and 361.83 m3/sec for a period of over 50 years. The time required for the peak flood from upstream to downstream for 19 hours. Keywords: analysis of hydrology, rainfall plan, and flood discharge plan
Optimasi Pembuatan Pellet Rumput Gajah (Pennisetum purpurium) sebagai Peluang Ekspor untuk Pakan Ternak Ruminansia Winarto Winarto; Nani Irwani; Suraya Kaffi
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 2 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i2.892

Abstract

The objectives of this research are to determine the quality of a given base material pellet steam treatment or blanching, determine the formulation of water use for the process of making elephant grass pellets to reach Pelleting Durability Index (PDI) of 100%, and measure the effectiveness of elephant grass pellets to the performance of large ruminants. The results of the research are obtained that the elephant grass (Pennisetum purpureum) with steam treatment 100ºC for 5 minutes and drying in the sun contains 36.51% crude fiber, crude protein 10.5%, energy metabolism of 4,826 kcal/kg, crude fat 1.8 %, water content 85.8%, 2.8% ether extract. ash content of 12.5%, 1.5% calcium and 0.4% phosphorus. The addition of water 10% of the weight of the material gives the best performance and value pellets made pellet durability index (PDI) was 100%. Milk production of elephant grass pellets giving treatment was higher (11.67 liters/day) compared to fresh grass treatment (10.5 liters/day) was significantly different at 5% level. Similarly, the parameters of the milk fat content in treatment provision elephant grass pellets (3.8%) was significantly different at 5% level by treatment giving fresh elephant grass (3.37%), while the phosphorus content, kalsium.laktosa, protein, and vitamin C did not happen the real difference between the two treatments.  Keywords: pellets, elephant grass, feed efficiency, animal performance

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