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Gatot Pramuhadi
Departemen Teknik Mesin Dan Biosistem Fakultas Teknologi Pertanian IPB University Bogor, Jawa Barat Indonesia And Pusat Pengembangan Ilmu Teknik Untuk Pertanian Tropika (CREATA) IPB University, Bogor, Indonesia
Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Materials Science & Nanotechnology Social Sciences Other

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KEKUATAN GESER TANAH PADA BERBAGAI DOSIS PUPUK ORGANIK GRANUL Gatot Pramuhadi; Dymaz Gonggo Yuda Arditha
JURNAL AGROTEKNOLOGI Vol 5 No 02 (2011)
Publisher : Faculty of Agricultural Technology, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (570.262 KB)

Abstract

Plants can grow and reach maximum production on optimum soil condition. Plants growth and agricultural machines application in farm fields were influenced by physical, chemical, and mechanical properties of soil. Granule organic fertilizer (GOF) application with a certain dosage could influence physical, chemical, and mechanical properties of soil. The objective of the research was to analyse interaction relationship between physical and mechanical soil properties alterations on GOF dosages variation. Soil consistency test, compaction test (Proctor’s test), and direct shear test were applied to soil samples on GOF dosages variation. Research results showed that the increasing of GOF dosages from 0 ton/ha up to 90 tons/ha would increase soil posity of (49.43-55.85)%, soil moisture content of (24.14-49.97)%, plastic limit of (35.96-41.82)%, and liquid limit of (56.01-61.75)%, but it would decrease maximum soil dry bulk density of (1.34-1.17) g/cc. Soil shear strength decreased from (0.91-1.41) kgf/cm2 down to (0.42-0.58) kgf/cm2 by the decreasing of soil dry bulk density of (1.14-1.09) g/cc and soil cohesion of (0.68-0.34) kgf/cm2 which resulted by the increasing of the GOF dosages.Keywords: soil shear strength, granule organic fertilizer, soil density, and soil cohesion
STUDI EFEKTIVITAS HERBICIDING GULMA LAHAN KERING PADA BERBAGAI METODE PENGABUTAN Gatot Pramuhadi; Muhammad Naufan Rais Ibrahim Rais Ibrahim; Henry Haryanto; Johannes Johannes
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 8, No 1 (2019): MARET
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1561.724 KB) | DOI: 10.23960/jtep-l.v8i1.1-9

Abstract

Studi kinerja pengendalian gulma lahan kering (herbiciding) pada berbagai metode pengabutan perlu dilakukan untuk membantu petani dalam menentukan pengabutan herbisida optimum.  Tujuan studi ini adalah menentukan efektivitas pengabutan untuk herbiciding pada berbagai metode pengabutan berdasarkan tekanan cairan dan tekanan udara.  Pengabut, atau sprayer, yang digunakan dalam penelitian ini terdiri atas mist blower TASCO MD-150, electric / battery sprayer JITU HX-D18F, dan air blower BOOSTER, sehingga dapat dilakukan penelitian pengabutan dengan 3 perlakuan, yaitu: (1) pengabutan oleh tekanan udara (mist blower), (2) pengabutan oleh tekanan cairan (electric sprayer), dan (3) pengabutan oleh tekanan cairan dan udara (electric sprayer + air blower).  Pengujian ketiga metode pengabutan dilakukan di dalam Laboratorium Alat dan Mesin Proteksi untuk menentukan debit pengabutan efektif, lebar pengabutan efektif, diameter droplet, dan kerapatan droplet.  Pengujian juga dilakukan di areal lahan kering untuk menentukan kapasitas keluaran dan persentase gulma mati.  Analisis dilakukan guna menentukan efektivitas pengabutan pada berbagai metode pengabutan berdasarkan tekanan udara, tekanan cairan, serta gabungan tekanan udara dan cairan.  Hasil penelitian menunjukkan bahwa besar debit pengabutan efektif, lebar pengabutan efektif, diameter droplet, dan kerapatan droplet pada perlakuan pengabutan oleh tekanan udara, pengabutan oleh tekanan cairan, dan pengabutan oleh tekanan cairan dan udara berturut-turut sebesar [0.679 liter/menit, 64 cm, 357.95 µm, 294.99 droplet/cm2], [1.039 liter/menit, 80 cm, 430.12 µm, 89.42 droplet/cm2], dan [1.616 liter/menit, 56 cm, 292.83 µm, 55.48 droplet/cm2].  Besar kapasitas keluaran dan efektivitas pengabutan pada perlakuan pengabutan oleh tekanan udara, pengabutan oleh tekanan cairan, dan pengabutan oleh tekanan cairan dan udara berturut-turut sebesar [6.40 liter/ha, 90.44%], [4.02 liter/ha, 74.99%], dan [3.84 liter/ha, 91.81%].  Semakin kecil ukuran (diameter) dropletnya, maka akan semakin mudah droplet masuk ke stomata gulma sehingga menghasilkan efektivitas pengabutan yang semakin besar dan pemberian aplikasi larutan herbisidanya paling hemat.
Potensi Mekanisasi Budidaya Tebu Lahan Kering di Kabupaten Merauke, Provinsi Papua (Mechanization Potency of Dry Land Sugarcane Cultivation at Merauke County, Papua Province) Gatot Pramuhadi
JURNAL PANGAN Vol. 22 No. 2 (2013): PANGAN
Publisher : Perum BULOG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33964/jp.v22i2.84

Abstract

Penelitian bertujuan untuk mengkaji potensi mekanisasi budidaya tebu lahan kering di Kabupaten Merauke, Propinsi Papua. Hasil kajian menunjukkan bahwa tanah di wilayah survey (Domande dan Kaliki) sangat potensial dalam menopang operasional mesin untuk pekerjaan pembukaan lahan, pembentukan lahan, dan penyiapan lahan sehingga tanah di wilayah survey berpotensi untuk aplikasi mekanisasi budidaya tebu lahan kering. Semua mesin (alat berat) merk Komatsu dan Caterpillar (ground pressure 0,26– 2,67 kgf/cm2) bisa dioperasikan di wilayah survey karena besar tahanan penetrasi tanah rata-rata hingga kedalaman 10 cm di lokasi survey sebesar 3,58 – 10,33 kgf/cm2. Tanah yang lebih dalam berpotensi memiliki densitas tanah maksimum lebih tinggi dibanding tanah di atasnya, sehingga perlu tindakan pengolahan tanah optimum lebih dari 40 cm. Nilai permeabilitas tanah rata-rata semakin turun pada lapisan tanah yang semakin dalam, yaitu dari 0,2625 mm/jam menjadi 0,0122 mm/jam dan dari 0,2567 mm/jam menjadi 0,0312 mm/jam. Tanah di wilayah survey tergolong tanah berdrainase buruk karena waktu peresapan air rata-rata ke dalam tanah lebih dari 30 hari, sehingga perlu rekayasa untuk membuat saluran-saluran drainase dalam dan kolam penampungan air yang bisa dimanfaatkan tanaman tebu lahan kering pada musim kering (kemarau). Waktu tersedia untuk operasional mesin sebanyak ± 14 hari/bulan dan sesuai untuk budidaya tanaman tebu lahan kering.The objective of the research was to study mechanization potency of dry land sugarcane cultivation in Merauke County, Papua Province with indicators were ability of machines to travel across soil surface on natural or field existing of soil physical and mechanical conditions, and ability of dry land sugarcane to grow and make interaction with new growing environment from planting up to harvesting. Results of the research showed that soil in surveyed region (Domande and Kaliki) were very potential in machines operational supporting for land clearing, land forming, and land preparation so that it had potency for mechanization application of dry land sugarcane cultivation. All machines with trade mark of Komatsu and Caterpillar (ground pressure of 0.26 – 2.67 kgf/cm2) could be operated in surveyed regions because the amount of average soil penetration resistance up to 10 cm depth in the surveyed regions were 3.58 – 10.33 kgf/cm2. Deeper soil layers possessed higher maximum soil dry bulk density than above soil layer, so that it needed optimum soil tillage action more than 40 cm from soil surface. Average soil permeabilities decreased on the deeper soil layers possessed higher maximum soil dry bulk density than above soil layer, so that it needed optimum soil tillage action more than 40 cm from soil surface. Average soil permeabilities decreased on the deeper soil layer, which were from 0.2625 mm/hour became 0.0122 mm/hour and from 0.2567 mm/hour became 0.0312 mm/hour. Soils in surveyed regions were categorized as bad drainage soil because it need average infiltration time more than 30 days, so that it need engineering application to make deep drainage canals and water ponds which can be took advantage by plant during draught season. Operational available time for machines operation was ± 14 days/month and suitable for dry land sugarcane cultivation. 
Faktor Iklim Pada Budidaya Tebu Lahan Kering Gatot Pramuhadi
JURNAL PANGAN Vol. 19 No. 4 (2010): PANGAN
Publisher : Perum BULOG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33964/jp.v19i4.160

Abstract

Harga gula pasir, yang sekarang sudah mencapai lebih dari Rp 12.000,-/kg nampak semakin sulit dikendalikan Harga gula yang semakin menggiurkan tersebut akan memicu perusahaan-perusahaan gula nasional meningkatkan produktivitas tebu (Tonne Cane Per Hectare :TCH) dan rendemen giling supaya diperoleh produktivitas gula (Tonne Sugar per Hectare:TSH) tinggi sehingga diperoleh keuntungan besar. Produksi tebu merupakan fungsi dari tanaman, tanah, iklim, dan tindakan budidaya. Faktor iklim adalah faktor yang tidak bisa dimanipulasi sehingga merupakan salah satu faktor penting yang sangat perlu untuk dipertimbangkan pada budidaya tebu lahan kering. Di beberapa lokasi pabrik gula di Indonesia dilaporkan bahwa TCH, rendemen giling, dan TSH mengalami penurunan akibat pengaruh iklim, yaitu akibat bergesernya (mundur) saat turun hujan pada masa pemeliharaan tebu dan hujan yang masih turun dengan curah hujan cukup tinggi pada saat panen (tebang) tebu. Saat turun hujan yang terlambat menyebabkan tanaman tebu mengalami kekeringan dan berupaya untuk bertahan hidup dengan cara mengurangi/membatasi penguapan, seperti menutup stomata daun, dan memperlambat pertumbuhan tanaman (ditandai dengan ruas-ruas tebu yang pendek) sehingga pada saat dipanen akan dihasilkan TCH rendah. Hujan yang masih turun ketika musim panen tebu menjadi penyebab utama turunnya rendemen giling dan tidak terangkutnya tebu tebang karena mobilitas kendaraan-kendaraan angkut yang sangat rendah pada kondisi tanah becek yang mengakibatkan turunnya TSH dan kapasitas giling (Tonne Cane per Day:TCD). Disamping itu, penggunaan mesin-mesin tebang tebu juga tidak bisa efektif akibat kondisi tanah tidak mendukung untuk pengoperasian mesin-mesin tersebut. Dengan demikian, perlu ditataulang perencanaan dan teknik budidaya tebu lahan kering, termasuk mekanisasi, guna mengantisipasi dampak perubahan iklim yang dapat mempengaruhi besaran TCH, rendemen giling, TSH, dan TCD.Sugar price was seemed more and more complicated controlled, that now it achieved more than Rp 12,000,00/kg. The fantastic sugar price would initiate national sugar companies to increase sugarcane productivity (TCH) and yield mill in order to achieve high sugar productivity (TSH) so that the companies would obtain big profit. Sugarcane production was as a function of plant, soil, climate, and cultivation effort. Climate factor was non-manipulated factor so that it was one of important factor that must be considered on dry land sugarcane cultivation. In several locations of sugarcane factories in Indonesia, it reported that the decreasing of TCH, yield mill, and TSH were caused by climate impact that is caused by late rainy season on sugarcane maintenance activities and big precipitations during sugarcane harvesting season. The late rainy season caused draught period for sugarcane plants and it attempt to survive by decreased or restricted its evaporation, for example it closed its leaves stomata and it decelerated its growth (which it signed by short stem sections) so that it would caused low sugarcane productivity. The rain during harvesting season would be main factor for yield mill decreasing and harvested sugarcane could not be loaded because of very low vehicles mobility on wet soil surface conditions that caused decreasing of sugar productivity and milling capacity (TCD). Beside that, sugarcane harvester machines could not be applied effectively as a result of wet soil conditions could not support for that machines operation. It can be concluded that it must be rearranged for dry land sugarcane cultivation planning to anticipate climate alteration impact that can influence TCH, yield mill, TSH, and TCD achievements. 
Mekanisasi Usahatani Budidaya Tebu Lahan Kering Gatot Pramuhadi
JURNAL PANGAN Vol. 18 No. 3 (2009): PANGAN
Publisher : Perum BULOG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33964/jp.v18i3.246

Abstract

Komoditi gula pasir senantiasa dibutuhkan oleh masyarakat, baik dalam skala rumah tangga maupun industri. Saat ini harga gula pasir cukup tinggi hingga kurang lebih Rp 9500,00/kg sehingga komoditi ini senantiasa diusahakan oleh pabrik-pabrik gula yang ada di Indonesia dengan cara membudidayakan tebu secara efektif dan efisien. Suatu studi diperlukan guna mempelajari efektivitas dan efisiensi pengolahan tanah, serta usahatani budidaya tebu lahan kering sehingga dapat dihitung keuntungan maksimum. Hasil studi di areal kebun tebu lahan kering dengan jenis tanah Ultisol milik PT Gula Putih Mataram, Sugar Group Company, Lampung Tengah pada bulan September 2002 hingga Agustus 2003 menunjukkan bahwa tindakan pengolahan tanah efektif menyebabkan kondisi sifat fisik tanah (densitas tanah) mencapai optimum rata-rata sebesar 1.30 g/cc untuk pertumbuhan tebu maksimum sehingga diperoleh produktivitas tebu (TCH) dan produktivitas gula (TSH) maksimum sebesar 63.08 ton/ha dan 7.30 ton/ha. Tindakan pengolahan tanah efisien menghasilkan waktu dan biaya pengolahan tanah minimum sebesar 0.64 jam/ha dan Rp 57673,00/ha. Pengolahan tanah efektif menghasilkan keuntungan sementara maksimum sebesar Rp 34966034,00/ha. Metode "subsoiling-plowing-harrowing-furrowing" merupakan metode pengolahan tanah optimum pada budidaya tebu lahan kering dengan jenis tanah Ultisol.  
Aplikasi Herbisida di Kebun Tebu Lahan Kering (Herbiciding at Dry Land Sugarcane Plantation) Gatot Pramuhadi
JURNAL PANGAN Vol. 21 No. 3 (2012): PANGAN
Publisher : Perum BULOG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33964/jp.v21i3.310

Abstract

Aplikasi herbisida (herbiciding) di kebun tebu lahan kering dapat digunakan untuk mengantisipasi penurunan produktivitas tebu akibat serangan hama maupun persaingan tumbuh dengan gulma. Tujuan penelitian ini adalah untuk menentukan efektivitas dan efisiensi aplikasi herbisida dengan menggunakan knapsack sprayer (KS), knapsack power sprayer (KPS), dan boom sprayer (BS). Aplikasi herbisida dilakukan di areal kebun tebu lahan kering milik PT Laju Perdana Indah (LPI), Palembang pada bulan Maret 2012. Hasil penelitian menunjukkan bahwa penggunaan KPS lebih efektif dibanding KS karena gulma-gulma yang mati setelah herbiciding yang menggunakan KPS sebesar 77,0 persen, sedangkan yang menggunakan KS sebesar (53,6-59,5) persen. Kecepatan operasi aplikasi herbisida rata-rata dengan menggunakan KS, KPS, dan BS berturut-turut sebesar 0,56 m/detik, 0,59 m/detik, dan 2,00 m/ detik sehingga mempengaruhi besar kapasitas lapang efektif aplikasi herbisida berturut-turut sebesar (0,10-0,11) ha/jam, 0,20 ha/jam, dan 2,66 ha/jam. Besar debit aliran herbisida dengan menggunakan KS, KPS, dan BS berturut-turut sebesar (60,69-65,40) liter/jam, 85,30 liter/jam, dan 1206,00 liter/jam, sehingga menghasilkan throwputcapacity sebesar (588,64-617,01) liter/ha, 418,94 liter/ha, dan 453,87 liter/ha. Perbedaan hasil unjuk kerja ketiga jenis sprayer tersebut menghasilkan perbedaan efisiensi aplikasi herbisida. Dengan menggunakan KS dan KPS terjadi ketidakefisienan (inefficiency) sebesar (47,2-54,3) persen dan 4,7 persen, atau terdapat pemborosan aplikasi herbisida sebesar (188,64- 217,01) liter/ha dan 18,94 liter/ha. Penggunaan BS ternyata lebih efisien yaitu terdapat penghematan sebesar 146,13 liter/ha (24,4 persen).Herbiciding at dry land sugarcane plantation can be used to anticipate decreasing sugarcane productivity caused by pest attack or growing competition with weeds. The objective of the research was to determine herbiciding effectiveness and efficiency using knapsack sprayer (KS), knapsack power sprayer (KPS), and boom sprayer (BS). Herbiciding was conducted on dry land sugarcane area of Laju Perdana Indah (LPI) Company, Palembang in March 2012. The results showed that the use of KPS was more effective than KS because the killed weeds after herbiciding using KPS was 77.0 percent, whereas using KS was (53.6-59.5) percent Herbiciding operational speeds using KS, KPS, and BS were 0.56 m/s, 0.59 m/s, and 2.00 m/s in average respectively, so that they influenced effective field capacity herbiciding of (0.10-0.11) ha/h, 0.20 ha/h, and 2.66 ha/h respectively. Herbicide solution debits using KS, KPS, and BS were (60.69-65.40) litre/h, 85.30 litre/h, and 1206.00 litre/h, so that they produced capacities of (588.64-61.01) litre/ha, 418.94 litre/ha, and 453.87 litre/ha. Difference in performances of the three sprayers would produce differences in herbiciding efficiency. The use of KS and KPS would produce inefficiency of (47.2- 54.3) percent and 4.7 percent, or there was any herbicide solution prodigality or providence of (188.64- 217.01) litre/ha and 18.94 litre/ha. The use of BS was more efficient because it could save herbicide solution of 146.13 litre/ha (24.4 percent). 
Pengabut Semprot Bergerak untuk Pemberantasan Hama Kelapa Sawit Gatot Pramuhadi; Zavira Mega Ayu; Muhammad Haikal Kusdian; Riza Fahri; Raesa Firdiansyah Pratama; Anik Rahayu
Jurnal Ilmu Pertanian Indonesia Vol. 27 No. 4 (2022): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18343/jipi.27.4.487

Abstract

Palm oil (Elaeis guineensis) is a tropical plant that can be attacked by various pests, start from nurseries to plantations, so it is necessary to eradicate pests. Generally, the pests is eradicated by applying pesticides using fogging machines brought down by farmers so that they are ineffective in reaching high plants, and hot smoke from fogging machines can damage oil palm leaves. This study aims to design a tool that can optimize the application of pesticide fog to oil palm plants at a certain height. The tool's design in the form of a mobile spray fogger also aims to facilitate the operator in applying pesticide fog at various heights of oil palm and, simultaneously, can reduce the impact of damage to oil palm leaves. The research method was carried out by testing the performance of pesticide fog spraying in the laboratory and the performance test of applying pesticide fog using mobile spray foggers on the land. Furthermore, pesticide smoke from fogging machines was optimized by combining electric sprayers and air blowers so that pesticide fog is formed, reducing the temperature of pesticide smoke, and increasing the range of fogging. The performance of the combination of outputs from fogging machines, electric sprayers, and air blowers on mobile spray fogger produces a droplet diameter of 94.41 μm, droplet density of 365.44 droplet/cm2, effective fogging range of 8.63 m, effective fogging width of 0.91 m, and an average temperature decrease of 4°C. Keywords: air blower, electric sprayer, fogging machine, palm oil, pests
Analysis of the Performance of Liquid Fertilization in Cucumber Cultivation Gatot Pramuhadi; Ahmad Jaelani Sidik; Ahmad Musyafa Haljauhari
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 12, No 2 (2023): June 2023
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v12i2.374-383

Abstract

Liquid fertilization can be applied to cucumber plants, including using electric sprayers, electric sprayers and air blowers, and using the mist blower. The three sprayer units are capable of producing fine granules (droplets) that can enter the stomata of cucumbers. This study aims to compare the results of spraying performance using the three methods of liquid fertilization in cucumber cultivation. The research method used is indoor testing in the Sprayer Laboratory to determine the value of the performance parameters of each method of liquid fertilization and outdoor testing to apply liquid fertilizer droplets to cucumbers and determine their effect on the growth and production of cucumbers. The results showed that the first fastest appearance of the flower and the first fruit was in the treatment using electric sprayers and air blowers at 24.6 days after planting (DAP) and 31.5 DAP. This treatment also produces cucumbers with the largest diameter, length, and weight of the fruit of 2.97 cm, 26.10 cm, and 298.28 grams. The accuracy of the dose of liquid fertilization application using an electric sprayer and air blower is 63.41%, an electric sprayer of 59.56%, and the mist blower of 29.90%. Keywords: Air blower, Droplet, Electric sprayer, Mist blower, Sprayer 
STUDI PEREMAJAAN TANAMAN KELAPA SAWIT DI AREAL LAHAN TANAH MINERAL DAN LAHAN GAMBUT Gatot Pramuhadi; Muhammad Aji Setiawan; Nenda Fuji Putri Daliesta
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 9, No 3 (2020): September 2020
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v9i3.201-212

Abstract

Oil palm trees that are more than 25 years old generally have low productivity of oil palm fruit and will decrease in productivity. For this reason, it is necessary to replant oil palm plants so that their productivity can be maintained high and increased. The aim of this research is to study the technique of replanting oil palm plants in mineral soil areas in the area of Kebun Aek Loba, PT Socfindo, Asahan Regency, North Sumatra Province and in the peatland area of Kebun Mandah Estate, PT Bhumireksa Nusa Sejati, Riau Province. Soil types in the Aek Loba garden area were dominated by mineral soils of the typic hapludult class and made from mother rock tufo toba and young alluvium with a soil pH of 5.5. Mandah Estate plantation area is 100% peat soil with a composition of 74% mature peat (sapric) and 26% medium peat (hemic). Peat is more than 3 meters deep (including very deep peat) and has a crumbly texture so it is easy to erode. The peat soil includes ombrogin peat (formed from large swampy plains), has a high acid content with a pH < 5.5, and has a peat soil density of (1.25 - 1.80) g / cc. Replanting activities in mineral soil areas include ripping, plowing, chipping, holing to planting with a large field capacity (0.04 - 0.72) ha / hour and a total time of completion of work (total field time) of 139.5 hours / ha. Replanting activities in peatland areas include falling, chipping, deboling, holing and planting with a large field capacity (0.06 - 1.25) ha / hour and a total field time of 73.7 hours / ha. Keywords: field capacity, mineral soils, peatlands, replanting, total field time
Desain dan Analisis Kinerja Air Blower Kipas Sentrifugal untuk Pengendalian Gulma Pramuhadi, Gatot; Ayu, Zavira Mega; Sidik, Ahmad Jaelani
Jurnal Agricultural Biosystem Engineering Vol 3, No 2 (2024): June 2024
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jabe.v3i2.9245

Abstract

This study aims to design and analyze the performance of the centrifugal fan water for weed control and compare it with the performance of air blowers that use axial fans. This study consists of three stages, namely design and manufacturing, testing in the laboratory, as well as testing for controlling dry land weeds in the field. There are 6 treatments tested, namely a combination of two types of fans (axial and centrifugal) and three types of cone nosel (4 holes, 5 holes, and 6 holes). The results showed that the centrifugal fan air blower displays good performance according to functional design and structural design.  Centrifugal fan blower performance is more effective than axial fan air blower because centrifugal fan blower is able to produce smaller (smoother) droplet diameters and larger droplet density (more tight) so that it has a greater herbiciding ability than axial fan air blower water .  Centrifugal fan blower can produce a droplet diameter of 94 microns to 118 microns more fine than axial fan of 246 microns to 299 microns.  The centrifugal fan blower can produce a larger droplet density (tight) of 369 droplets/cm2 to 538 droplets/cm2 compared to the axial fan of 74 droplets/cm2 to 117 droplets/cm2.  The centrifugal fan blower water produces a spraying discharge of 1.22 liters/minute to 1.41 liters/minute is smaller than the axial fan of 2.33 liters/minute to 2.93 liters/minute.  The ability of centrifugal fan herbiciding is 76.21% to 78.02% greater than axial fan of 76.36% to 77.41%. Keywords: Air Blower, Axial Fan, Centrifugal Fan, Herbiciding, Weeds
Co-Authors Abdillah, Kemas Asror Agus Sutejo Agusta, Waqif Ahmad Jaelani Sidik Ahmad Jaelani Sidik Ahmad Musyafa Haljauhari Andri Asmoro Surbakti Anhar, Fahri Anik Rahayu Asep Sapei Ayu, Zavira Mega Chitra Gusti Indah Walpuri Daliesta, Nenda Fuji Putri Diaguna, Ridwan Dionisius Dwi Wicaksono Dymaz Gonggo Yuda Arditha E. Namaken Sembiring Edi Santosa Eduard Namaken Sembiring Frans Jusuf Daywin Henry Haryanto Herdhata Agusta Johannes Johannes Josua Natanael Maulana, Sidik Muhammad Aji Setiawan Muhammad Haikal Kusdian Muhammad Idkham Muhammad Naufan Rais Ibrahim Rais Ibrahim Natanael, Josua Nenda Fuji Putri Daliesta Nenda Fuji Putri Daliesta Oteng Haridjaja Palupi, Nurheni Sri Raesa Firdiansyah Pratama Riza Fahri Sam Herodian Sidik, Ahmad Jaelani Sofyan Zaman Sucahyo, Lilis Syaiful Anwar Tineke Mandang Trya Adheshi Holqi Ulya, Putri Rutbata Walpuri, Chitra Gusti Indah Waqif Agusta Wawan Hermawan Wicaksono, Dionisius Dwi Zavira Mega Ayu