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Rona Teknik Pertanian
Published by Universitas Syiah Kuala
ISSN : 20852614     EISSN : 25282654     DOI : -
Core Subject : Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Engineering
JRTP is the official journal from the Department of Agricultural Engineering, Faculty of Agriculture, Syiah Kuala University (Unsyiah), Banda Aceh-Indonesia. It covers and devotes a complete and interdisciplinary wide range of research and review in engineering applications for agriculture and biosystems: agricultural machinery, soil and water engineering, tillage, precision farming, post-harvest technology, agricultural instrumentation, sensors, bio-robotics, systems automation, processing of agricultural products and foods, quality evaluation and food safety, audit energy, waste treatment and management, environmental control, energy utilization agricultural systems engineering, bio-informatics, computer simulation, farm work systems, mechanized farming and ergonomi.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 207 Documents
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Perancangan Dan Pengujian Model Mobil Robot Penanam Bibit Kangkung Rizki Aulia Nanda; Arhami Arhami; Rudi Kurniawan
Rona Teknik Pertanian Vol 13, No 2 (2020): Volume 13, No. 2, Oktober 2020
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v13i2.16982

Abstract

Abstrak. Penanaman bibit kangkung sesuai prosedur dilakukan dengan proses menajuk, proses menajuk memakan waktu yang lama, sehingga membuat petani melakukan penaburan bibit untuk mempersingkat waktu peanaman, namun berpotensi terjadi gagal panen akbiat bibit tidak tertanam. Tujuan penelitian ini yaitu membangun mobil robot penanam bibit kangkung. Metode yang diperlukan dalam membangun mobil robot ini meliputi, penghitungan rata-rata bedengan, perancangan mobil robot, perakitan, dan pengujian. Dari metode tersebut maka diperoleh hasil yang meliputi desain dan analisis desain, hasil pembuatan/perakitan, hasil pengujian dan hasil penanaman. Desain mobil robot memiliki ukuran sesuai ukuran rata-rata bedengan yang digunakan petani yaitu 1,6  m, hasil analisis menunjukan beban maksimum robot 28,80 kg dengan perpindahan maksimal 3,266 mm yang membuat chassis masih aman digunakan.Proses perakitan mobil robot meliputi komponen elektronika dan komponen chassis sesuai dengan hasil desain dan perancangan. Robot yang telah dirakit dilakukan pengujian. Pengujian elektronika menampilkan keluaran arus sebesar 3A, tegangan 12 volt dan tahanan 5,4 ohm, pada penggunaan baterai dengan kapasitas 7,4 Ah yang dapat bekerja selama 4,5 jam dengan menggunakan stepdown supaya arus stabil membuat kecepatan stabil dan tidak membuat komponen mobil robot hangus akibat loncatan tegangan. Karena mobil robot bekerja secara autonomous maka pengujian vision juga diperlukan sebagai indra penglihatan gerak pada mobil robot. Selama 4,5 jam mobil robot dapat menanam bibit dengan luas lahan 4,7 hektar (4788 m2).Design and Testing Mobile Robot Spinach Water Seed PlantingAbstract. Planting water spinach seeds according to the procedure were carried out by the process of crowning, the process took a long time, so it made farmers sow seeds to shorten the planting time, but there was a potential for crop failure due to not planting the seeds. The purpose of this research was to build a mobile robot water spinach seed planting. The methods needed to build this robot car included calculating the average bed, designing a robot car, assembling, and testing. From this method, the results obtained included design and design analysis, manufacturing/assembly results, testing results, and planting results. The mobile robot design had a size according to the average size of the beds used by farmers, namely 1.6 × 1.4 × 0.5 m, the analysis results showed that the robot's maximum load was 28.80 kg with a maximum displacement of 3.266 mm which made the chassis still safe to use. The robot car assembly process included electronic components and chassis components in accordance with the design and design results. The assembled robot was tested. Electronic testing displayed a current output of 3A, a voltage of 12 volts, and a resistance of 5.4 ohms, on the use of a 7.4 Ah battery that can work for 4.5 hours using a step down so that the current was stable to make the speed stable and did not make robot car components scorched due to voltage jumps. Because robot cars worked autonomously, vision testing was also needed as a sense of motion in robot cars. During 4.5 hours the robot car can plant seeds with a land area of 4.7 hectares (4788 m2).
Analisis Kecenderungan Hujan Tahunan di Wilayah UPT PSDA Pasuruan: Aplikasi Metode Sperman’s Rho, Distribution Free Cusum dan Student’s T Test Afro Aransa Sahat; Indarto Indarto; Sri Wahyuningsih
Rona Teknik Pertanian Vol 11, No 2 (2018): Volume 11, No. 2, Oktober 2018
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v11i2.11785

Abstract

Abstrak. Artikel ini memaparkan hasil analisis kecenderungan hujan tahunan di wilayah UPT PSDA di Pasuruan. Data hujan harian dari 69 lokasi digunakan untuk analisis. Periode rekaman data dari tahun 1980 sampai dengan tahun 2015. Analisis statistik dan visualisasi histogram dilakukan untuk menggambarkan variabilitas spasial dan temporal hujan per sub-wilayah. Selanjutnya, analisis kecenderungan menggunakan tiga metode yaitu : spearman’s Rho, distribution free CUSUM, dan student’s t test dilakukan terhadap data hujan tahunan. Visualisasi nilai per stasiun digunakan untuk menggambarkan variabilitas kecenderungan hujan tahunan pada wilayah tersebut. Hasil penelitian menunjukkan adanya perbedaan antar stasiun. Sebagian lokasi menunjukkan kecenderungan positif atau negatif yang menggambarkan adanya kecenderungan jumlah hujan tahunan yang meningkat atau menurun selama dua dekade terakhir. Sebagian besar stasiun tidak menunjukkan adanya kecenderungan positif atau negatif. Penelitian juga menghasilkan peta lokasi kecenderungan positif dan negatif. Application of Spearman’s rho, Distribution Free CUSUM, and Student’s t Test for Rainfall Trend Detection: study at the administrative area of UPT PSDA Pasuruan Abstract. This paper describes the results of rainfall trend analysis in UPT PSDA in Pasuruan. Daily rainfall data from 69 rain stations was used for analysis. The data recording period starts from 1980 to 2015. Statistical analysis and histogram visualization were performed to illustrate the spatial and temporal variability of annual rainfall data between sub-districts. Furthermore, trend analysis used three methods: Spearman's Rho, distribution-free CUSUM, and student's were performed on annual rainfall data. Visualization of stationary trend values is used to describe the variability of annual rainfall trends in the region. The results showed that there were differences between stations. A small proportion of the locations show a positive or negative trend that represents a trend of increased or decreasing annual rainfall over the past two decades. Most stations do not show any positive or negative tendencies. The research also produced a map of the location of the train station showing a positive and negative tendency.
Pendugaan Umur Simpan Tepung Biji Durian (Durio Zibethinus) Dengan Menggunakan Persamaan Arrhenius Suhaimi Suhaimi; Ratna Ratna; Kiman Siregar
Rona Teknik Pertanian Vol 9, No 1 (2016): Volume 9, No. 1, April 2016
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v9i1.4409

Abstract

Abstrak. Suhu merupakan faktor yang berpengaruh terhadap perubahan mutu tepung biji durian. Oleh karena itu dalam menduga kecepatan penurunan mutu selama penyimpanan faktor suhu harus selalu diperhitungkan. Keadaan suhu penyimpanan tetap dari waktu ke waktu maka penurunan mutu cukup dengan menggunakan persamaan arrhenius. Tujuan Penelitian ini adalah mengetahui pengaruh larutan natrium metabisulfit (Na2S2O5) dan pengukusan terhadap warna tepung biji durian yang dihasilkan, dan menduga umur simpan tepung biji durian. Hasil penelitian ini menunjukkan bahwa umur simpan tepung biji durian pada suhu 30 0C tanpa perlakuan = 55,70 hari, perlakuan natrium = 61,05 hari, perlakuan pengukusan 10 menit = 53,21, perlakuan pengukusan 20 menit = 61,32 hari dan perlakuan pengukusan 30 menit = 44,07 hari. Pada suhu 35 0C tanpa perlakuan = 51,82 hari, natrium perlakuan = 53,83 hari, perlakuan pengukusan 10 menit = 48,96 hari, perlakuan pengukusan 20 menit = 63,18 hari dan perlakuan pengukusan 30 menit = 42,59 hari. Pada suhu 40 0C tanpa perlakuan = 50.50 hari, perlakuan natrium = 46.23 hari, perlakuan pengukusan 10 menit = 65,80 hari, perlakuan pengukusan 20 menit = 54,86 hari, dan perlakuan pengukusan 30 menit = 39,40 hari. Suhu 55 0C tanpa perlakuan = 19,83 hari, perlakuan natrium = 22,78 hari, perlakuan pengukusan 10 menit = 18,65 hari, perlakuan pengukusan 20 menit = 26,73 hari, dan perlakuan pengukusan 30 menit = 27,14 hari. Dari penelitian ini didapat lima model yaitu K = 291339554,8 e-6443(1/T),K = 114691,3 e-4025(1/T), K = 35596,4 e-3676(1/T), K = 23155,7 e-3570(1/T), K = 211,6 e-2016(1/T).  Estimation Save Life Flour Seeds Durian (Durio zibethinus) Using Arrhenius Equation Abstract. Temperature is a factor affecting the change in the quality of durian seed flour. Therefore the suspect speed deterioration during storage temperature factors should be taken into account. State storage temperature fixed from time to time, the degradation simply by using the Arrhenius equation. The purpose of this study was to determine the effect of sodium metabisulfite (Na2S2O5) and steaming towards color durian seed flour produced, and suspect the shelf life of durian seed flour. The results of this study indicate that the shelf life of durian seed flour at 30 0C without treatment = 55.70 days, sodium treatment = 61.05 days, treatment steaming 10 minutes = 53.21, steaming treatment 20 minutes = 61.32 days and steaming treatment 30 minutes = 44.07 days. At a temperature of 35 0C without treatment = 51.82 days, sodium treatment = 53.83 days, treatment steaming 10 minutes = 48.96 days, treatment steaming 20 minutes = 63.18 days and steaming treatment 30 minutes = 42.59 days. At a temperature of 40 0C = 50,50 days without treatment, treatment of sodium = 46.23 days, treatment steaming 10 minutes = 65,80 days, treatment steaming 20 minutes = 54.86 days, and treatment of steaming 30 minutes = 39.40 days. Temperature 55 0C without treatment = 19.83 days, the treatment of sodium = 22.78 days, treatment steaming 10 minutes = 18.65 days, treatment steaming 20 minutes = 26.73 days, and treatment of steaming 30 minutes = 27.14 days. From this study, obtained five models, namely K = 291339554,8 e-6443(1/T), K = 114691.3 e-4025(1/T), K = 35596.4 e-3676(1/T), K = 23155.7 e-3570(1/T), K = 211.6 e-2016(1/T).
Performance of a Forced-Convection Greenhouse Dryer for Fish Drying Martunis Martunis
Rona Teknik Pertanian Vol 6, No 1 (2013): Volume 6, No. 1, April 2013
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v6i1.914

Abstract

ABSTRACT. This research present experimental performance of a forced convection greenhouse dryer for drying of fish. The greenhouse dryer was installed at Aceh province, Indonesia. It has a concrete floor with the area of 6×4 m2. The roof of dryer is built in semi-cylindrical shape and covered with transparent polycarbonate sheets. Two axial flow fans powered by a 50-watt solar cell module was used to generate forced convection for ventilating the dryer.To investigate its performance, the dryer was used to dry two batches of fish. The Results showed that to dry 50 kg fish with initial moisture 68 % required 11 hours. Incontrast, to dry the same amount of fish using sun drying take a time about 2 days. The air temperature inside greenhouse dryer at noon in the clear day was 45-55°C.Kinerja Pengering Rumah Kaca Dengan Metode Konveksi Paksa Untuk Pengeringan IkanABSTRAK. Penelitian ini memperlihatkan hasil percobaan terhadap kinerja pengering rumah kaca dengan metode konveksi udara secara paksa pada pengeringan ikan. Penelitian pengering rumah kaca ini dilakukan di Propinsi Aceh, Indonesia. Pengering ini berlantaikan beton dengan luas sebesar 6x4 m2. .Atapnya dibuat berbentuk semi-selinder dan ditutup dengan lembaran plastik transparan berbahan polikarbonat. Dua buah kipas dengan aliran udara secara aksial dipasang dengan sumber daya berasal dari panel surya sebesar 50 Watt dan dipakai untuk menghasilkan konveksi udara paksa pada ventilasi pengering. Untuk menginvestigasi kinerja rumah kaca ini, pengering ini digunakan untuk mengeringkan dua tumpukan ikan. Hasilnya menunjukkan bahwa untuk mengeringkan sebanyak 50 kg ikan dengan kadar air awalnya sebesar 68% membutuhkan waktu selama 11 jam. Sebaliknya, dengan menggunakan sinar matahari secara langsung, untuk mengeringkan ikan dengan jumlah yang sama, maka waktu yang dibutuhkan lebih lama yaitu sekitar 2 hari. Suhu udara di dalam rumah pengering tepat pada siang hari yang cerah berkisar antara 45-55oC.
Model Rancangan Zero Runoff Sistem (ZROS) Integrasi Bangunan Penampung Hujan dan Sumur Resapan Radius Pranoto; Ricky Ravsyan A; Anggi Nidya S; Djaka Suhirkam
Rona Teknik Pertanian Vol 15, No 1 (2022): Volume No. 15, No. 1, April 2022
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v15i1.23395

Abstract

Abstrak. Sebagian besar wilayah Indonesia memiliki potensi curah hujan yang tinggi rata-rata berkisar 2000 - 4000 mm/tahun.  Curah hujan merupakan salah satu sumber air bersih yang ekonomis dan bisa dimanfaatkan secara langsung. Namun sebaliknya, hujan juga akan merugikan dan menimbulkan masalah, seperti; genangan, banjir, longsor, erosi, sarang penyakit jika tidak dikelola dan dikendalikan dengan baik. Penelitian ini bertujuan untuk merancang model zero runoff sistem (ZROS) integrasi antara sarana detensi hujan dan sumur resapan air hujan (SRAH) untuk mengendalikan limpasan hujan dari atap gedung di lingkungan Kampus Politeknik Negeri Sriwijaya. Dari pengujian dperoleh nilai permeabilitas tanah  sebesar 1,874 cm/jam atau sekitar 0,45 m/hari. Simulasi dilakukan menggunakan data hujan harian tahun 2007-2018 pada beberapa dimensi model ZROS integrasi bak penampung (kapasitas 4,5 m – 12 m3) dan SRAH (kedalaman 2 m dan diameter 0,57 m – 0,7 m). Diketahui model ZROS integrasi bak penampung (kapasitas 4,5 m3) dan sumur resapan air hujan (kedalaman 2 m dan diameter 1,4 m) mampu mereduksi debit limpasan hingga 100 % (zero runoff) dari bidang tadah hujan per 100 m2. Rancangan model ZROS integrasi terdiri dari bak penampung segiempat terbuat dari beton atau pasangan batu bata dan sumur resapan air hujan berbentuk silinder dengan dasar dan dinding porous (dinding terbuat pasangan batu bata atau tanah kosong).Desain Model of Zero Runoff System (ZROS) Rainwater Storage Building and Well Recharge IntegratedAbstract. Most of the region of Indonesia has the potential for high rainfall with an average of 2000 - 4000 mm/year. Rainwater is one source of clean water that’s economical cost and could be used directly. On the other hand, the rain will be detrimental and cause many problems, such as; puddles, floods, landslides, erosion, and nests of disease if not managed and controlled properly. The purpose of this study was to design a zero runoff system (ZROS) model integration between rain detention facilities and rainwater infiltration wells to control rain runoff from the roof of the building on the Sriwijaya State Polytechnic Campus. From the test, the soil permeability value is 1,874 cm/hour or about 0,45 m/day. The simulation was carried out using daily rainfall data for 2007-2018 on several dimensions of the ZROS model integration of the reservoir (capacity 4,5 – 12 m3) and infiltration wells (depth 2 m and diameter 0,57 m– 0,7 m). The results show that the ZROS model of the integration of the reservoir (capacity 4,5 m3) and rainwater infiltration wells (depth 2 m and diameter 1,4 m) were able to reduce runoff up to 100% (zero runoff) from rainfed area per 100 m2. The design of the integrated ZROS model consists of a rectangular reservoir made of concrete or masonry and a cylindrical infiltration well with a porous base and walls (walls made of masonry or vacant soil).
Kajian Volume Bahan dan Lama Penyangraian terhadap Karakteristik Kopi Mengkudu (Morinda citrifolia L.) Renny Eka Putri; Andasuryani Andasuryani; Genni Deea Solehia
Rona Teknik Pertanian Vol 11, No 1 (2018): Volume 11, No. 1, April 2018
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v11i1.8496

Abstract

Abstrak. Proses penyangraian pada mengkudu dapat meningkatkan aroma dan cita rasa kopi mengkudu yang dihasilkan. Asumsi masyarakat tentang aroma mengkudu yang tengik bisa hilang setelah dilakukan proses penyangraian. Pengujian dilakukan dengan pengamatan volume bahan (500 gram dan 250 gram) dengan lama waktu penyangraian (10 menit, 15 menit, dan 20 menit) sedangkan pengamatannya meliputi kadar air, perubahan suhu, rendemen penyangraian, drajat kehalusan, nilai (oHue), kandungan vitamin C dan uji organoleptik non konsumsi. Hasil dari penelitian didapatkan nilai kadar air mengkudu berpengaruh terhadap volume dan lama penyangraian yang dibuktikan dengan semakin menurunnya kadar air yang didapatkan. Kadar air mengkudu sangrai 9,791 % sampai 9,301% dan kadar air kopi mengkudu 9,677 % sampai 9,277 %. Berbeda dengan nilai rendemen, nilai oHue dan Vitamin C mengkudu yang tidak ada pengaruhnya terhadap volume bahan penyangraian. Study of Volume and Duration of Roasting Process affects the Characteristics of Noni Coffee (Morinda citrifolia L.) Abstract. Roasting is one of process that can improved the aroma and taste of noni coffee generated. Community assumptions about the smell of rancid noni can be lost after the roasting. The test was done by observing the volume (500 gram and 250 gram) with the duration roasting (10 minutes, 15 minutes, and 20 minutes) while the observations include moisture content, temperature changes, yield, value (oHue), vitamin and non-consumption sensory test. The result of this research showed that the moisture content of noni content influenced the volume and duration roasting as evidenced by the decreasing of moisture content obtained. Water content is from 9.791 % to 9.301 % and water content of noni coffee is from 9.677 % to 9.277 %. In contrast to the value of rendemen, the value of oHue and Vitamin C has no effect on the volume of the material.
Studi Ketebalan Elektroda Pada Produksi Gas HHO (Hidrogen Hidrogen Oksigen) Oleh Generator Hho Tipe Basah Dengan Katalis NaHCO3 (Natrium Bikarbonat) Ihsan Sopandi; Yuli Hananto; Bayu Rudiyanto
Rona Teknik Pertanian Vol 8, No 2 (2015): Volume 8, No. 2, Oktober 2015
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v8i2.3007

Abstract

Abstrak. Salah satu energi alternatif yang efektif dikembangkan sekarang ini untuk mengganti bahan bakar minyak yaitu hidrogen. Untuk mendapatkan gas hidrogen dapat  dilakukan melalui proses elektrolisis air dengan memecahkan senyawa H2O menjadi gas HHO (Hidrogen Hidrogen Oksigen) dengan bantuan listrik arus searah (Direct Current) melalui media elektroda berupa plat stainless steel 304. Pada penelitian ini, akan diteliti hasil produksi gas HHO oleh generator HHO tipe basah dengan metode elektrolisa H2O menggunakan variasi ketebalan elektroda jenis stainless steel 304 yaitu 0,8 mm, 1 mm dan 1,2 mm dengan katalis NaHCO3 (Natrium Bikarbonat) pada larutan elektrolitnya. Karakteristik yang diketahui meliputi konsumsi daya listrik yang digunakan oleh generator, volume gas yg dihasilkan,  laju produksi gas HHO yang dihasilkan dan efisiensi generator. Hasil penelitian dan pengujian generator HHO tipe basah ini didapatkan generator terbaik pada ketebalan elektroda 1 mm diperoleh data hasil pengujian dengan daya HHO yang digunakan sebesar 59,11 Watt, laju produksi gas HHO yang dihasilkan sebanyak 0,00054 kg/s dan efisiensi generator HHO sebesar 9,42 %. Study On The  Electrode Thickness In HHO (Hidrogen Hidrogen Oksigen) Gas Production By Wet Type HHO Generator With Catalyst NaHCO3 (Natrium Bikarbonat)Abstract. One of the alternative energy that effective and currently being developed to replace fossil fuels is hydrogen. To obtain the hydrogen gas can be done through the process of electrolysis of water by breaking the compound H2O into HHO (Hydrogen Hydrogen Oxygen) gas by using an electric direct current through the medium of 304 stainless steel plate  as an electrode. This research will be developing and observing HHO gas production process using HHO generator wet type (wet cell) through electrolysis H2O with thickness variation of electrode that used 0.8 mm, 1 mm and 1.2 mm of electrode 304 stainless steel plate with NaHCO3 (Nathrium Bicarbonat) catalyst in the electrolyte solution. Characteristics that will be observed including the consumption of electrical power used by the generators, produced gas volume, HHO gas production rate and generator efficiency. Results of research and HHO generator wet type (wet cell) testing have obtained the best generator at a thickness of 1 mm electrode, testing data obtained with the use of HHO power of 59.11 watts, the rate of production of HHO gas is 0.00054 kg/s and HHO generator efficiency by 9.42%.
Pengaruh Jenis Kemasan Dan Lama Penyimpanan Terhadap Karakteristik Mutu Bunga Telang (Cloria Ternatea) Kering Hotman Manurung; Benika Naibaho; Topma Boang Manalu; NDM Romauli
Rona Teknik Pertanian Vol 16, No 1 (2023): Volume No. 16, No. 1, April 2023
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v16i1.29384

Abstract

Abstract The increasing variety of benefits of the butterfly pea flower requires the availability of dried butterfly pea flowers to replace fresh butterfly pea flowers. A study has been carried out on "The Influence of Packaging Type and Storage Time on the Quality Characteristics of Dried Butterfly Pea Flower (clitoria ternatea). The aim of the study was to determine the effect of the type of packaging and storage time on the quality characteristics of dried butterfly pea flowers. The study was conducted using an experimental method with a Completely Randomized Factorial Design (RALF). Treatment of packaging types: K1 = PolyPropylene (PP) Plastic Packaging and K2 = Aluminum Foil (AF) Packaging. Storage time: L0= 0 days; L1= 7 days; L2= 14 days; L3=21 days. The research was conducted with 3 replications. Data were analyzed using SPSS software version 20. Significantly different effects were tested by Duncan's test at the level of p=0.05. The results showed that the water content of the butterfly pea flower was 10.1% in the PP packaging and 9.7% in the AF packaging. Dried butterfly pea flowers contained a total phenol of 9.74 mg/g in PP packaging and 11.5 mg/g in aluminum foil packaging. IC50 values in PP and AF packaging were 242.7 and 224.4 ppm, respectively. The water content of the butterfly pea flowers increased significantly from 8.7% at 0 days of storage to 11.1% at 21 days of storage. Anthocyanin and flavonoid bioactive compounds were detected by positive tests up to 21 days of storage. The total phenol of the butterfly pea flower decreased significantly from 14.95 mg/g at 0 days of storage to 6.19 mg/g at 21 days of storage. IC50 value (antioxidant activity) increased from 140.1 ppm to 293.1 ppm during storage.Keywords: Butterfly pea flower, PolyPropylene and aluminium foil packaging, anthocyanin and phenol  AbstrakMeningkatnya ragam manfaat bunga telang menuntut tersedia bunga telang kering untuk menggantikan bunga telang segar. Telah dilakukan penelitian “Pengaruh Jenis Kemasan dan Lama Penyimpanan Terhadap Karakteristik Mutu Bunga Telang (clitoria ternatea) Kering”. Tujuan penelitian untuk mengetahui pengaruh jenis kemasan dan lama penyimpanan terhadap karakteristik mutu bunga telang kering. Penelitian dilakukan dengan metode ekperimental dengan Rancangan Acak Lengkap Faktorial (RALF). Perlakuan jenis kemasan :  K1 = Kemasan Plastik PolyPropilen (PP) dan K2 = Kemasan Aluminium Foil (AF).  Lama penyimpanan :  L0= 0 hari ; L1= 7 hari; L2= 14 hari ; L3=21 hari. Penelitian dilakukan dengan 3 ulangan. Data dianalisis  menggunakan software SPSS versi 20. Pengaruh yang berbeda nyata diuji dengan uji Duncan pada taraf p=0.05.  Hasil penelitian menujukkan kadar air bunga telang 10,1% pada kemasan PP dan 9,7% pada kemasan AF. Bunga telang kering mengandung total fenol 9,74 mg/g pada kemasan PP dan 11,5 mg/g pada kemasan aluminium foil.  Nilai IC50 dalam kemasan PP dan AF masing-masing 242,7 dan 224,4 ppm. Kadar air bunga telang meningkat secara nyata dari 8,7%pada penyimpanan 0 hari menjadi 11,1% pada penyimpanan 21 hari. Senyawa bioaktif antosianin dan flavonoid terdeteksi uji positif sampai pada penyimpanan 21 hari. Total fenol bunga telang menurun secara nyata dari 14,95 mg/g pada penyimpanan 0 hari menjadi 6,19 mg/g pada penyimpanan 21 hari. Nilai IC50 (aktivitas antioksidan) meningkat dari 140,1ppm sampai 293,1ppm selama penyimpanan. 
Analisis Kecepatan Maju Traktor dan Putaran Pisau Pemotong Pada Pengeprasan Tebu Ratoon Syafriandi Syafriandi
Rona Teknik Pertanian Vol 5, No 2 (2012): Volume 5, No. 2, Oktober 2012
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v5i2.236

Abstract

Analysis on Forward Speed of Tractor and The Spin of Cutter Knife on Ratoon Sugarcane Stubble ShaverABSTRACT. Cultivating ratoon sugarcane by using a stubble shaver conducted on sugarcane cultivation could save the cost of production. A good cultivation could be done by cutting the rest of the plant to the ground. The tool that commonly used was a hoe and a stubble shaver. Revitalization program that included the production of mechanical tools, in addition to providing lucrative benefits in the production business, on the other hand also had weaknesses in some aspects. To improve the quality and efficiency of the tool functions required the development and improvement tools. For example, the development and improvement efforts on tools sugarcane stubble shaver. Therefore, it still needed to conduct research on sugarcane stubble shaver machines to improve productivity especially in the cultivation of ratoon sugarcane stubble by improving the quality of results that would not break the ratoon sugarcane. The purpose of this study was to analyze the forward speed of the tractor and the blade rotation speed of ratoon sugarcane.
Pengukuran Suhu Permukaan Menggunakan Pancaran Spektral dari Citra Satelit: Studi Kasus di Banda Aceh Putra Arafat Taqwallah; Ichwana Ramli; Alia Rizkia
Rona Teknik Pertanian Vol 14, No 2 (2021): Volume 14, No.2, Oktober 2021
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v14i2.22028

Abstract

Abstrak. Tingginya tingkat urbanisasi menyebabkan meluasnya wilayah perkotaan dan menciptakan daerah keras yang mengakibatkan suhu tinggi di wilayah perkotaan, termasuk Banda Aceh. Permasalahan ini tentu menimbulkan ketidaknyamanan bagi masyarakat Banda Aceh. Beberapa penelitian melaporkan bahwa suhu udara yang terlalu tinggi dapat menyebabkan masalah kesehatan yang serius di masyarakat. Suhu permukaan Banda Aceh diukur menggunakan Spectral Radiance dari Satellite Imager, kemudian dibandingkan dengan data yang diukur langsung di lokasi penelitian. Hasil menunjukkan suhu udara di Banda Aceh berkisar antara 22,32°C hingga 34,86°C.  Selain itu, terjadi korelasi antara penggunaan ruang dengan tingkat suhu udara Banda Aceh berdasarkan parameter hard area dan vegetasi. Namun, hanya variabel jarak dengan badan air yang memiliki korelasi signifikan terhadap perubahan tingkat suhu.Surface Temperature Distribution Using Spectral Radiance from Satellite Imagery: A Case Study in Banda AcehAbstract. The high rate of urbanization will have an effect on land change. The increasing number of buildings and lack of green open space will hinder the direction of wind speed, cause inconvenience to the public. The purpose of this study was to determine the distribution of surface temperature in the city of Banda Aceh based on the spectral emission of Landsat images from vegetation density, distance from the river, and built-up area. The air temperature data were obtained using the classification method from the digital number value of the Landsat image to the spectral radiance and then converted into air temperature. The density of the built-up area was analyzed from the Normalized Difference Vegetation Index (NDBI) and the density of the vegetation was analyzed from the Normalized Difference Vegetation Index (NDVI). The air temperature distribution map from the image is divided into 3 zones that are densely populated (built-up area), vegetation and distance to water bodies to be measured directly in the field. The air temperature from the lansat 8 images ranged from 22.32°C to 34.86°C. The zone with a distance of 3,457 km from a water body, with less vegetation density (0) and a built-up area of 0.16-0.23 has a temperature of 31.96oC -32.45oC, while the zone with a water body distance of 1,255 km with a built-up area below zero and vegetation has a temperature of 25.82oC-27.09oC. Based on the parameters of space use (vegetation and built-up area) and the distance between the zone and the water body, it has an influence on the distribution of air temperature in the city of Banda Aceh.

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