Articles

KAJIAN ASPEK LINGKUNGAN DALAM PENGEMBANGAN AGROEKOWISATA PADA SISTEM SUBAK Sumiyati, Sumiyati; Sutiarso, Lilik; Windia, Wayan; Sudira, Putu
Bumi Lestari Journal of Environment Vol 12, No 2
Publisher : Udayana University

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Abstract

Along with the development of the tourism in Bali, one of the phenomena occurs was that the land conversion to the non-agricultural land and pollution, and increased water demand not only for irrigation. These conditions affect the sustainability of the subak system. One strategy to support the sustainability of the subak system is the synergy between agriculture (Subak) to tourism, which developed agroecotourism on the subak system. It must consider the physical and social environment. The purpose of this study is to analyze the existing condition of Subak in Bali and if it made the development agroecotourism on the subak systems. This is about the quality of irrigation water, the physical condition of irrigation facilities, subak system facilities, and socio-cultural conditions of subak system. Water quality in Subak Anggabaya, Subak Lodtunduh, and Subak Padanggalak with the development of Kertalangu agrotourism, is in good condition. It could be argued that if made ??the development of agroecotourism on the subak systems, irrigation water quality can still be maintained in good condition are used for agriculture. The value of physical conditions on Subak Anggabaya was 2.00 (moderate) and at the Subak Lodtunduh are 2.00. With the development of agroecotourism on the subak systems be 2.21 on Subak Anggabaya and 2.23 on Subak Lodtunduh. A Socio cultural condition on subak system management to support the development of agroecotourism area, at Subak Anggabaya was 2.00 (moderate) and at the Subak Lodtunduh are 2.23 (between moderate and good). With expected agroecotourism visitors activities can provide positive influence (3.00) to the local community and the socio cultural conditions of subak system can increase or better.
Kinetics Model of Tomato Quality Changes During Storage Masithoh, Rudiati Evi; Rahardjo, Budi; Sutiarso, Lilik; Harjoko, Agus
Jurnal Teknologi Pertanian Vol 14, No 1 (2013)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

This study aims at developing a kinetics model of changes in tomatoes quality during storage. Samples were stored at temperature of 6, 15, and 28 °C. Quality parameters measured were total carotene, citric acid, and vitamin C. On the development of kinetic models of quality parameter changes the k values of total carotenoids, citric acid, and vitamin C were 0.075, -0.008, and 0.042 at 6 °C, 0.056, -0.029, and 0.049 at 28 °C, as well as 0.125, -0.039, dan 0.044 at 28 °C, respectively. Activation energy of the decrease of citric acid was 47.91 kJ/mol, whereas for total carotene and vitamin C were 17.83 kJ/mol dan 0.96 kJ/mol. The coefficient of determination (R2) of the quality content between observation and prediction were 0.70-0.96. Keywords: Kinetics, total carotene, citric acid, vitamin C, tomato
Aplikasi Sistem Monitoring Pertumbuhan Tanaman Berbasis Web Menggunakan Machine Vision Sutiarso, Lilik; Suyantohadi, Atris; Kastono, Dody; Nugroho, Andri Prima
Agritech Vol 31, No 4 (2011)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.9644

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Nowadays, demand for integrating between information technology (IT) and development of agricultural system isin order to increase the productivity, efficiency and profitability in term of precision agriculture. This matter occurred due to some problems in the field, such as; unintensively monitoring activities for plant during the growing period. One of the alternative solutions to overcome the problem was introducing the machine vision technology in the farming system. The research is actually as a basic research that aims using technology of digital image processing and software of computation (mathematics) to support a function of real-time monitoring system for plant growing. The research mechanism was started from digital image processing by using an image segmentation method that can identify between the main object (plant) and others (soil, weed). Image processing algorithm used excess color method and color normalization to identify plants, to calculate crop area. Otsu method was used to convert it to binary images. The next was to calculate and analyze a percentage of the plant growing, from after planting until harvesting time. The analyzed data were stored as MySQL database format in the web server. Final output of the research was the web based monitoring instruments for plant growing that can be accessed through intranet (local area network) as well as internet technology. From the software testing, monitoring with a machine vision system has a success rate reached 70 % for identifying plants.ABSTRAKTuntutan integrasi teknologi sistem informasi dan sistem pertanian saat ini dimaksudkan guna mendukung efisiensi,produktivitas dan profitabiltas pertanian. Hal tersebut didorong oleh timbulnya permasalahan di lapangan terkait dengan belum optimalnya produktivitas tanaman yang diakibatkan antara lain, kurang intensifnya pemantauan (monitoring) tanaman pada masa pertumbuhan. Salah satu alternatif solusi untuk memperbaiki permasalahan tersebut dengan mengaplikasikan teknologi machine vision. Penelitian yang dilakukan merupakan penelitian dasar yang bertujuan memanfaatkan teknologi pengolahan citra digital dan perangkat lunak komputasi untuk mendukung fungsi monitoring pertumbuhan tanaman secara real-time. Mekanisme penelitian dimulai dengan tahap pengolahan citra digital yang menggunakan metode segmentasi untuk mengenali objek tanaman dengan objek lainnya. Algoritma pengolahan citra menggunakan metode kelebihan hijau dan normalisasi warna, sedangkan untuk menghitung luas tanaman digunakan metode  Otsu  dengan  mengubah  ke  citra  biner. Tahap  berikutnya  menghitung  prosentase  pertumbuhan  tanaman selama proses budidaya sampai dengan panen. Data hasil pencitraan disimpan dalam basisdata MySql. Hasil akhir dari pengolahan data ditampilkan sebagai informasi pertumbuhan tanaman yang ditampilkan di website. Dari hasil pengujian, sistem monitoring dengan machine vision ini memiliki tingkat keberhasilan mencapai 70 % dalam mengenali tanaman.
Strategi Pengembangan Potensi Wilayah Agroindustri Perkebunan Unggulan Herdhiansyah, Dhian; Sutiarso, Lilik; Purwadi, Didik; ., Taryono
Jurnal Teknik Industri Vol 13, No 2 (2012): Agustus
Publisher : Department Industrial Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.22219/JTIUMM.Vol13.No2.201-209

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The development of plantation agro-industry should refer to primary commodity approach. Until now there is no accurate reference for government Kolaka. The diversifications of products and by-product have not developed yet. The objectives of this research were to formulate development strategy of regional potential of the prime plantation agro industry. The object of this research is six primary commodities of plantation; those are cacao, clover, pepper, cashew, coconut, and coffee in Kolaka Regency with Delphi and SWOT methods. The research results showed that the development strategy of regional potential of the prime plantation agro industry there are at quadrant I or that strategy was created by using all the power to take advantage of opportunities that an aggressive strategy by doing independence improvement of the farmers through development and counseling, partnership development on agro-industry activities in the effort of giving additional value of production. 
SISTEM PENDUKUNG KEPUTUSAN BERBASIS JARINGAN SYARAF TIRUAN UNTUK PERAMALAN HARGA TANAMAN PANGAN Simanungkalit, Ferlando Jubelito; Sutiarso, Lilik; Purwadi, Didik
Jurnal Teknotan Vol 7, No 3 (2013)
Publisher : Fakultas Teknologi Industri Pertanian

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Abstract

Peramalan harga tanaman pangan perlu dirancang untuk memberikan stimulus kepada para pengambil keputusan terkait dengan kebijakan stabilisasi harga pangan, tendensi harga masa depan, dan jadwal tanam yang dapat memaksimumkan  laba.  Kajian dilakukan berdasarkan tingkat harga bulanan komoditas tanaman pangan  bulan  Januari 2000-Juli 2011 di Kabupaten Sleman, D.I. Yogyakarta. Metode penilaian Mean Square Error (MSE) dan Mean Absolute Percentage Error (MAPE) dengan toleransi validitas 15 persen digunakan untuk menentukan komoditas tanaman pangan dari 324 percobaan yang memiliki performansi terbaik. Dari 6 jenis komoditas tanaman pangan yang menjadi objek kajian, arsitektur JST yang paling baik diperoleh dari komoditas beras IR64 dengan arsitekur [12 – 32 – 1], nilai laju pembelajaran 1,75 dan kisaran transformasi data terletak pada [0 dan 1], dengan nilai MSE dan MAPE pelatihan, pengujian dan validasi berturut-turut adalah [0,00125 dan 2,807 %], [0,0219 dan 3,289 %], [0,0244 dan 3,575 %]. Kata kunci: sistem pendukung keputusan, jaringan syaraf tiruan, peramalan harga,                          tanaman pangan.
AUDIT ENERGI PADA BERBAGAI JENIS INDUSTRI TAHU BERDASARKAN TEKNOLOGI PEMASAKANNYA Markumningsih, Sri; Purwantana, Bambang; Sutiarso, Lilik
Jurnal Teknotan Vol 7, No 1 (2013)
Publisher : Jurnal Teknotan

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Abstract

Berdasarkan teknologi pemasakannya cara penggunaan energi selama ini pada beberapa jenis industri tahu disinyalir belum efisien. Penelitian dilakukan pada 4 produsen tahu yang masing-masing menggunakan teknologi pemasakan berbeda, yaitu; tungku tunggal, tungku ganda, ketel uap horizontal, dan ketel uap vertikal. Metoda deskriptif analisis digunakan untuk mengkaji rasio masukan-luaran energi. Energi masukan adalah tenaga kerja manusia, energi bahan bakar, energi yang sudah terbentuk, dan energi bahan, sedang energi luaran adalah energi tahu, dan energi ampas tahu. Hasil penelitian menunjukkan bahwa total input energi tertinggi sebesar 19.005,05 kJ/kg tahu terjadi pada ketel uap vertikal dan terrendah sebesar 6.026,80 kJ/ kg tahu pada tungku tunggal. Tingginya konsumsi energi untuk mengoperasikan ketel uap vertikal terjadi karena ia bekerja di bawah kapasitas normal. Kata kunci : audit energi, industri tahu, ketel uap, tungku
Penyusunan Sistem Pendukung Keputusan untuk Penetapan Indeks Ketahanan Pangan di Tingkat Rumah Tangga dan Wilayah 458 (Studi Kasus di Desa Srimartani, Piyungan, Bantul, Yogyakarta) Erniati, Erniati; Sutiarso, Lilik; Sudira, Putu
Agritech Vol 33, No 4 (2013)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.9542

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Food security in Indonesia at national level, is considered as adequate, when seen from the side of availibility but the level of poverty is still high. It means that even the national food availability is abundant, but it can not be accessed by all residents at household level. Therefore, food security situation should be constantly monitored. one method to identify and provide food security situation data / information is establishment of food security index. This research has an objective to design instrument (a software) Decision Support System (DSS) to define food security index in household and region level. DSS for defining food security index needs to be done, so that there is a computer-based information system program that can be used to process and present data better, as a reference for policy makers on food security issues. The program is designed using a desktop-based software. It integrated the dialog subsystem, models subsystem, database subsystems and knowledge components subsystem. The data was collected at Srimartani village, Piyungan district, Bantul Regency, D.I. Yogyakarta Province, applying survey and interview methods in designing database. The dynamically designed program indicated that DSS program for food security index in household and region level can be used as an instrument to identify and give food security situation on a regular basis information. The information can be shown in the form of indexes and categories, as well as maps. according to the food security index result analysis for the household level of Sample Village, there were 1 sub-village in food insecurity,  6 sub-village in food vulnerable; and 10 sub-village in food security status. according to food insecurity index of the region level, food security level of Srimartani Village can be categorized as good enough, which was shown by index value 0,48. It means that all subvillage in Srimartani Village was categorized as secure enough, secure, and very secure. Based on this result analysis, according to the knowledge base of food security owned by the author, it was suggested to the local and provincial government to monitor region situation/condition regularly, especially for sub-village with food vulnerability category. The DSS program recommended the local and provincial government to give direct aid which will help the community to solve the food insecurity problem. ABSTRAKKetahanan pangan di Indonesia secara nasional tergolong cukup apabila dilihat dari sisi ketersediaan, namun tingkat kemiskinan masih cukup tinggi. Itu artinya meskipun ketersediaan secara nasional melimpah, namun pangan tersebut tidak bisa diakses oleh semua warga sampai ke tingkat rumah tangga. oleh karena itu, ketahanan pangan merupakan salah satu hal yang perlu terus menerus diawasi keadaannya dari waktu ke waktu. Salah satu metode untuk mengidentifikasi dan memberikan data/informasi tentang situasi ketahanan pangan adalah dengan penetapan indeks ketahanan pangan. Penelitian ini ditujukan untuk membangun instrument (seperangkat software) Sistem Pendukung Keputusan (SPK) untuk menetapkan indeks ketahanan pangan di tingkat rumah tangga dan wilayah. SPK (Decission Support System/DSS) untuk penetapan indeks ketahanan pangan perlu dilakukan supaya tedapat suatu program yang dapat digunakan sebagai sistem informasi berbasis komputer untuk mengolah dan menyajikan data dengan lebih baik sebagai bahan acuan bagi para pengambil kebijakan terkait masalah ketahanan pangan. Program dirancang dengan pemrograman berbasis desktop sebagai software bantu dalam menggabungkan subsistem dialog, subsistem model, subsistem basis data dan subsistem komponen pengetahuan. Pengumpulan data dilakukan di Desa Srimartani, Piyungan, Bantul, D.I.Yogyakarta dengan metode survey dan wawancara untuk diolah sebagai basis data. Hasil perancangan program menunjukkan bahwa program SPK untuk indeks ketahanan pangan di tingkat rumah tangga dan wilayah yang dirancang secara dinamis dapat digunakan sebagai instrument untuk melakukan identifikasi serta memberikan data/informasi situasi ketahanan pangan secara berkala yang ditampilkan dalam bentuk laporan berupa indeks dan kategori serta peta. Berdasarkan hasil analisis terhadap indeks ketahanan pangan di tingkat rumah tangga di desa sampel menunjukkan adanya 1 dusun rawan pangan; 6 dusun rentan pangan; 10 dusun tahan pangan. Berdasarkan indeks ketahanan pangan di tingkat wilayah, situasi ketahanan pangan Desa Srimartani cukup baik, ditunjukkan dengan indeks kurang dari 0,48 artinya semua dusun di Desa Srimartani masuk kategori cukup tahan, tahan dan sangat tahan. Berdasarkan hasil analisis, sesuai dengan knowledge base tentang ketahanan pangan yang dimiliki penulis, disarankan agar aparat desa dan pemeritah dapat melakukan monitoring situasi/kondisi wilayah secara berkala. Untuk dusun yang masuk kategori rawan pangan, program SPK memberikan rekomendasi kepada Pemerintah dan aparat desa agar memberikan bantuan langsung/bantuan tunai agar dapat membantu kondisi rawan pangan yang sedang terjadi.
Analisis Spektral dalam Penentuan Periodisitas Siklus Curah Hujan di Wilayah Selatan Jatiluhur, Kabupaten Subang, Jawa Barat Susilokarti, Dyah; Arif, Sigit Supadmo; Susanto, Sahid; Sutiarso, Lilik
Agritech Vol 36, No 1 (2016)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.10688

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Rainfall data was studied to know how rainfall in the region has a span of time to form a repetitive pattern. The cycle is a change or a wave up and down within a period and repeated at other periods. The cycle has a frequency that can be completed in one period of time. Fourier transform is an algorithm to convert the time domain X to the domain or the frequency spectrum Y, by breaking the signal into a sinusoidal component. This study used the Fast Fourier Transform (FFT) to find the nature of the trend recurrence of rainfall in the southern region of Jatiluhur Subang. Simulation model was done using monthly rainfall data 1975 - 2012. The results showed a trend of rainfall in the study area was repeated every 12 months (1 cycle). Rainfall prediction was done by using a 5-year rainfall data and used the data observation of the next 5 years as a comparison result predicted to see the performance. Performance prediction was resulted using the Mean Square Error (MSE) used to obtain the difference between the standard derivation calculation of observed data and data modeling. The results of the analysis at the time of validation of the model was MSE    14.92 with a 95% confidence level. FFT used to calculate the value of the error (the difference between the values calculated by the ANN model and observed data) resulted in the change cycle of rainfall occurs over a period of months or approximately 71.68 months or 5-6 years.ABSTRAKData curah hujan dipelajari salah satunya untuk mengetahui bagaimana curah hujan di suatu wilayah mempunyai rentang waktu untuk membentuk suatu pola berulang. Siklus merupakan suatu perubahan atau gelombang naik dan turun dalam suatu periode serta berulang pada periode lain. Siklus mempunyai frekuensi yang dapat diselesaikan dalam 1 periode waktu. Transformasi Fourier merupakan algoritma untuk mengubah domain waktu X menjadi domain atau spectrum frekuensi Y, dengan cara menguraikan sinyal menjadi komponen sinusoidal.  Penelitian ini menggunakan metode Fast Fourier Trans!orm (FFT) untuk mencari sifat berulangnya trend curah hujan di wilayah selatan Jatiluhur Kabupaten Subang. Simulasi model menggunakan data curah hujan bulanan tahun 1975 - 2012. Hasilnya menunjukkan trend curah hujan di lokasi penelitian berulang setiap 12 bulan sekali (1 siklus). Prediksi curah hujan dilakukan dengan menggunakan data curah hujan 5 tahun dan menggunakan observasi data 5 tahun berikutnya sebagai pembanding hasil prediksi untuk melihat performa yang dihasilkan. Performa hasil prediksi menggunakan Mean Square Error (MSE) sebagai standar perhitungan derivasi perbedaaan antara data real dan data pemodelan. Hasil analisis pada saat validasi model didapatkan MSE    14,92 dengan tingkat kepercayaan 95%. Dengan menggunakan analisis FFT untuk menghitung nilai error (perbedaan antara nilai perhitungan model ANN dengan data sebenarnya), diperoleh perubahan siklus curah hujan terjadi dalam kurun waktu 71,68 bulan atau sekitar 5-6 tahun.
Pengembangan Perangkat Lunak Life Cycle Assessment (LCA) untuk Ampas Tebu (Studi Kasus di Pabrik Gula Madukismo, Yogyakarta) Rosmeika, Rosmeika; Sutiarso, Lilik; Suratmo, Bandul
Agritech Vol 30, No 3 (2010)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.9670

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This study was conducted to develop software which can process data to be information of bagasse life cycle assess- ment (LCA). This study was done by collecting data of sugarcane process production and the utilization of bagasse as a boiler fuel at Madukismo Sugar Mill, Yogyakarta. Data analysis utilized the LCA standard analysis based on ISO14040 series. LCA software which has been developed can be applied in a simulating for condition of energy input, energy output, emission and its impact of bagasse life cycle in the sugarcane industry. The analysis results using LCA software showed that the energy input at the mill and boiler station in Madukismo Sugar Mill was higher than energy output, and bagasse utilization as a boiler fuel was more environmental friendly than fossil fuel.ABSTRAKPenelitian ini bertujuan untuk mengembangkan suatu perangkat lunak yang dapat mengolah data menjadi informasi mengenai Life Cycle Assessment (LCA) dari ampas tebu. Penelitian ini dilakukan dengan pengambilan data pada proses produksi gula tebu dan pemanfaatan ampasnya untuk bahan bakar ketel uap di Pabrik Gula Madukismo, Yog- yakarta. Analisis data menggunakan standar analisis LCA berdasarkan ISO seri 14040. Perangkat Lunak LCA yang dikembangkan dapat digunakan untuk melakukan simulasi kondisi dalam input dan output energi, serta emisi dan dampak yang mungkin ditimbulkan dalam proses daur hidup ampas tebu pada industri gula. Hasil analisis menggunakan perangkat lunak LCA menunjukan bahwa input energi di stasiun gilingan dan stasiun ketel PG Madukismo lebih besar dibandingkan output energinya, dan pemanfaatan ampas tebu sebagai bahan bakar lebih ramah lingkungan dibandingkan bahan bakar fosil.
An Information Support System for Identifying Farming System Part I : Development of A Computer Program Package Sutiarso, Lilik
Agritech Vol 22, No 1 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.13572

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This study was undertaken to develop a computer program package for identifying a farming system that was focused in the water availability analysis, the optimizing of agricultural power and selected equipment and the senditivity analysis. The computer programs for all models were developed and written in FoxBASE command language. Three databases were obtained from the farm survey i.e.; climate, crop and power. All these databases can be appended, edited, deleted or displayed by the users through a menu of database mahagement system (DBMS). They were used to evaluate the utility of the computer programs as input data. The infromation system calculates the amoun of monthly water surplus and deficit, the optimum number of agricultural power (animal or power tiller) and its matching implement required and also change in the net return of crop production system due to the change of input variables such as crop price, yield, and production material cost. The system output for each analysis can be presented in three options by screen, printer and file that can be accessed to another language.