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Kota madiun,
Jawa timur
INDONESIA
JURNAL AGRI-TEK
ISSN : 14115336     EISSN : 25800035     DOI : -
Core Subject : Agriculture,
Arjuna Subject : -
Articles 8 Documents
Search results for , issue " Vol 15, No 1 (2014): JURNAL AGRI-TEK" : 8 Documents clear
Pemanfatan Bekas Spesi Untuk Pembuatan Spesi Baru Aji, Seno; Arif Bakhtiar E, Moh
JURNAL AGRI-TEK Vol 15, No 1 (2014): JURNAL AGRI-TEK
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Abstract

Generally, building residential or construction of buildings in indonesia using walls of masonry red both in finishing with stucco or without stucco. Aim of this study to determine the compressive strength value uses a new specie of the former specie aggregate results dismantling the wall and to determine the compressive strength value of comparison with the new specie aggregate (using natural sand aggregate Ngraho Bojonegoro). Specie siar recycle used in this study contains material was red brick, sand, red cement, lime and cement. Ingredient for all specie that used on the specimen testing using a ratio of 1 PC : 5 sand. the compressive strength value testing using a sample of a cube measuring 150 mm x 150 mm x 150 mm with 3 variations of the sample is 0% (without the former specie), 50% (with 50% of the former specie) and 100% (100% with the new specie using natural sand aggregate Ngraho Bojonegoro). the compressive strength value of Species from the recycle specie qualify as specie type O, with a minimum compressive.strength.value.is.24,5.kg/cm2.Key words : new specie, the former specie, species of siar, the compressive strength value.
Eksperimental Bentuk Sudu Turbin Pelton Setengah Silinder Pada Variasi Sudut Keluaran Air Untuk Pembangkit Listrik Tenaga Picohydro Sutomo, Sutomo; Arief Budiman, Arief Budiman
JURNAL AGRI-TEK Vol 15, No 1 (2014): JURNAL AGRI-TEK
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Abstract

Water turbine is prime mover that converts the kinetic energy of the water flow at high velocity into mechanical energy in the form of turbine wheel rotation. One type is a water turbine is pelton turbine, where the main components is runner where was mounted around a hemispherical -shaped blade and nozzle . During this form of pelton turbine blades are widely used form of bowls (bucket), with the size and number of a particular blade, while the other form is rarely used . To determine how much influence the change in shape of the blade to the turbine generated power, it is necessary to research on changes in the shape of the pelton turbine blade performance. In this study aims to do exactly the pelton turbine performance experiments on the effect of changes in the characteristics of the type of half - cylinder blades . Stages of the research is to design and plan a pelton turbine with several variations of the output angle of water on a half - cylinder - shaped blade, and then investigate the optimization of the output angle of water on the turbine blade pelton turbine performance . The parameters measured in the test is the water flow rate, water pressure at the nozzle , turbine shaft rotation and torque . Specified parameters and is variable in this study is the output angle of water on the blade, namely : 1700, 1730, 1760 and 1790. Results obtained from this research is pelton water turbine with output angle of water on the blade (β2) of 1790 produces mechanical power and highest efficiency of 462.60 watts, with 71.62 % mechanical efficiency and overall system efficiency of 30.02 % . Differences lowest turbine mechanical power (at β2 = 1700) and the highest (at β2 = 1790) amounted to 9.12 watts, or 1.97 %Keywords : Pelton turbine, nozzle, vanes, Angle Output Water
Model Pendugaan Biomassa Dan Karbon Hutan Rakyat Jati Unggul Nusantara (Kasus Hutan Rakyat Jati Unggul Nusantara (JUN) Umur 5 Tahun Desa Trosono, Kecamatan Parang Kabupaten Magetan) Lukito, Martin; Rohmatiah, Ahadiati
JURNAL AGRI-TEK Vol 15, No 1 (2014): JURNAL AGRI-TEK
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Abstract

JUN have important role in the conservation and see the economic advantages such as root crops JUN stable compoun, Produce fast-growing plants , with quality timber products from aspects of conservation and can be harvested from the age of 5 years from the economical aspects . The purpose is the potential magnitude Predicting wood and plant biomass potential JUN.dan carbon content stored in various plant organs, the magnitude of the potential suspect plantation forests to absorb CO2 . The study was conducted on public forests in the village Trosono JUN plants . District. Parang . Kab . Magetan , through forest inventore . The results : Estimated potential stand stand for community forest plants ranged JUN 288.74 m3 , or with an average of 87.667 m3/ha average volume of 0.1337 m3/ tree with the smallest volume of 0.00789 m3 and Smallest volume of 0.0045 m3 and the largest of 0.7387 m3 . The total potential of biomass is 56.2 tons . Or the equivalent of 17.295 tons/Ha . The composition of the biomass plant organs on the trunk of 53.84 % by weight of the total biomass , while root occupies second place at 19.55 % , 16.01 % and a branch of the most smallest leaves at 10.60 % . Average carbon content of the sample stands of trees ranged from 7.86 kg , ranging from 8.73 tons of Co2/ha composition of plant organs in organ stem reaches 53.14 % of the total carbon content of trees , followed by 19.29 % roots , Branch 15:30 % , and leaves of 10:46 % . CO2 sequestration potential when converted to the number of plants per hectare on average 31.97 tons CO2/ha . Allometric equation which is derived in this study as follows .Keywords : Potential , Biomass ; carbon dioxide , CO2 absorption ,
Implementasi Tutorial Berbasis Deep Dialogue Dan Critical Thinking Dalam Tutorial Pendidikan Matematika 2 Pada Mahasiswa S-1 PGSD Pokjar Ngawi Tresnaningsih, Sri; Dwikoranto, Dwikoranto
JURNAL AGRI-TEK Vol 15, No 1 (2014): JURNAL AGRI-TEK
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Abstract

Improving activities of tutorial require to apply correct strategy of tutoring. Problem that will be solved is how to implement the deep dialogue and critical thinking (DD/CT) in tutorial activities and student achievement improvement at subject of mathematics2nd and also student response by applying the DD/CT in tutorial. Target of the research is to describe the implementation form of DD/CT in tutorial activities and improvement of learning achievement, and also student response with applying of DD/CT in tutorial. Device research of development adoption of four-D model from Thiagarajan. . Research subject is students of S-1 PGSD group Ngawi.. Result learn in very good category (RTT-1: 85,0; RTT-2: 89,0; and RTT-3: 90,5) and mount each;every phase ( 4,71% and 1, 70%).Keywords: tutorial, dialogue deep, thinking critical.
Studi Perbandingan Analisis Gaya Gempa Terhadap Struktur Gedung Di Kota Madiun Berdasar SNI 1726 2002 dan RSNI 201X Kholilur Rohman, Rosyid
JURNAL AGRI-TEK Vol 15, No 1 (2014): JURNAL AGRI-TEK
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Abstract

Planning a building should refer to regulations on the procedures and rules that apply. It's been done socializing RSNI-03-1726-201X which regulates Standar Perencanaan Ketahanan Gempa untuk Struktur Bangunan Gedung as substitution to SNI-03-1726-2002. The implications of new standart for building need to be done for research. In this study, made building structure model 5 floors with a size 24 x 24 m2. The location of the building in Madiun city and its function as an office. The structure is analyzed with SNI 03-1726-2002 and RSNI-03-1726-201X so that known changes of earthquake load value, distribution of earthquake load on each level, internal force and displacement. Analysis of the structure used ETABS version 9. Results of the analysis shown that earthquake load according to SNI 1726 201X bigger around 27.5% and the distribution of load more bigger on each floor. Internal forces more bigger around 27,67 % in column structure and more bigger 28,56 % on beam structure. Displacement of structure more bigger about 27,99– 30,92 %.Keywords : earthquake load, analysis of structure, internal force, dispalcement
Analisis DAS Sambong Dengan Menggunakan Aplikasi GIS Arif Bakhtiar E, Arif Bakhtiar E
JURNAL AGRI-TEK Vol 15, No 1 (2014): JURNAL AGRI-TEK
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Abstract

Watershed management becomes an important effort for development and environmental sustainability . With the limited availability of land , accommodations for activities in rural areas will lead resulting in changes in land use . Sambong watershed located in Batang also experiencing the same problem . Utilization of open space is important as a critical watershed reduction category . The purpose of the study was to analyze the use of the appropriate region on the location of the study area using Geographic Information System application . The analysis showed that the watershed Sambong sloped ramps up with a rather steep with most having rainfall 2500-3000 mm / yr and soil type latusol . The results show that the overlay district is used as an area worthy of cultivation . However, please note that in this case the conservation management of the watershed that need to be balanced proportion between farming, buffer and protected areas.Keywords: watershed, land use , geographic information systems
Analisis Ekonomi Usaha Wanatani Di Kawasan Hutan Rakyat Kecamatan Gemarang Kabupaten Madiun Susanto, Anang; Sulasno, Sulasno
JURNAL AGRI-TEK Vol 15, No 1 (2014): JURNAL AGRI-TEK
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Abstract

Perennials in the area of planted forest folk are usually smaller in extent than the seasonal crops planted , so the most it can do the mixing plant communities with seasonal annual plants in the same region and are on the land . , Preservation activities by managing vacant land . This study aims to : 1.Menghitung feasibility of agroforestry on public lands .2 . Knowing strata of society with the land tani.Luas wana program is divided into three strata . The division of the land area strata based on the average land ownership in Java are narrow . The third stratum : 1.Strata 1 with a land area of less than 0.25 ha of land 2.Strata 2 with 0.5 to 1 ha 3.Strata 3 land area of more than 1 ha results in this study were able , Net Present Value ( NPV ) / Net Value for strata I Rp . 14,869,064 while stratum II Rp . 8,803,698 , and for the third strata of Rp . 35,129,500 , - , Benefit Cost Ratio ( BCR ) of 5.85 for strata I , II strata of 1.37 and of 2.43 for stratum III Results for , Gain Ratio , Internal Rate of Retrun ( IRR ) of strata I 26 % while for stratum II by 38 % and for stratum III by 31 % refund Analysis Break Even Point ( BEP ) expenditures and receipts strata I can break even in year 3 , while on the second level of expenditures and receipts can break even in year 4 , and the strata III revenues and expenditures break even in 3rd.Keywords : Perennials , strata , farmers , forest land_
Analisis Termogravimetri Terhadap Pembakaran Pelet Biomassa Campuran Sudarno, Sudarno; Budi Harsanto, Aris
JURNAL AGRI-TEK Vol 15, No 1 (2014): JURNAL AGRI-TEK
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Abstract

This study aims to investigate the magnitude of the activation energy of combustion of pellets with TGA method with a temperature rate of 20  C / min in air atmosphere. Pellets are made from a mixture of two types namely biomass sawdust and rice husk. Each of the previous biomass is pulverized to mesh 20 + / 40 - and 40 + / 60-.Pelet made with some variation of the percentage composition of the mixture by weight of rice husk into sawdust 0%, 25%, 50%, 75% and 100% on each powder size. Results and analysis of data obtained on the composition of 25% sawdust and rice husk 75% yield the lowest value of the activation energy of combustion is equal to Ea = 12183.34 J / Mol of powder size 20 + / 40 -. While the process of burning powder pellets of size 40 + / 60 - much longer than the size of the powder 20 + / 40 - .Keywords: TGA, Burning, Pellet, Activation Energy

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