Rona Teknik Pertanian最新文献

{"title":"Perencanaan Stabilitas Lereng Timbunan untuk Perbaikan Saluran Irigasi Sugih, Desa Cibedug, Kecamatan Ciawi, Kab. Bogor","authors":"Nurul Chayati, Feril Hariati, A. Alimuddin, Fadhila Muhammad Libasut Taqwa, M. Ilham","doi":"10.17969/rtp.v15i1.18959","DOIUrl":"https://doi.org/10.17969/rtp.v15i1.18959","url":null,"abstract":"Abstrak. Saluran irigasi Sugih yang terletak di Desa Cibedug, Kecamatan Ciawi, Kabupaten Bogor sudah tidak dapat berfungsi pasca terjadinya longsoran di kawasan tersebut pada akhir tahun 2020. Longsoran tersebut sampai saat ini belum dilakukan perbaikan. Ratusan hektar sawah di Kp. Turki Rt 01 Rw 03 Desa Cibedug dipastikan gagal panen pada musim ini. Saluran irigasi Sugih yang diandalkan oleh warga untuk mengairi sawahnya terputus akibat bencana longsor. Tujuan dari penelitian adalah menganalisis sifat fisis dan mekanis tanah di saluran irigasi Sugih Desa Cibedug, Kecamatan Ciawi Kabupaten Bogor serta melakukan analisis stabilitas lereng dengan Metode Bishop Disederhanakan (Simplified Bishop Method) dan menggunakan aplikasi Autocad 2018 untuk mendapatkan perencanaan stabilitas lereng dan timbunan tanah yang diperlukan. Hasil analisis sifat fisis, mekanis didapatkan nilai parameter tanah. Berat isi tanah kering (gdry) 13,60 kN/m3, berat isi (g) rata rata sebesar 2,18 gr/cm3, nilai sudut nilai geser tanah (f) sebesar 26,19˚ dan nilai lekatan antara partikel tanah kohesi (c) sebesar 0,09 kN/m2,pada software Autocad 2018 didapatkan dimensi lereng 1 : 1, volume galian sebesar 1.594 m3,timbunan sebesar 1.830,26 m3 dan luasan longsoran sebesar 1.000,30 m2. Berdasarkan perhitungan menggunakan Metode Bishop Disederhanakan didapatkan nilai faktor keamanan (safety factor) 1,83 sehingga lereng yang direncanakan tersebut stabil.Embankment Slope Stability Planning for Sugih Irrigation Channel Improvement, Cibedug Village, Ciawi District, Bogor RegencyAbstract. The Sugih irrigation channel which is located in Cibedug Village, Ciawi District, Bogor Regency is no longer functioning after the landslide occurred in the area at the end of 2020. Until now, the landslide has not been repaired. Hundreds of hectares of rice fields in Kp. Turki Rt 01 Rw 03, Cibedug Village is confirmed to have failed crops this season. The Sugih irrigation channel that residents rely on to irrigate their fields was cut off due to landslides. The purpose of the study was to analyze the physical and mechanical properties of the soil in the Sugih irrigation channel of Cibedug Village, Ciawi District, Bogor Regency and to analyze the slope stability using the simplified Bishop method and use the Autocad 2018 application to obtain the required slope stability and soil fill plan. The results of the analysis of physical and mechanical properties obtained soil parameter values. Dry soil fill weight (gdry) 13.60 kN/m3, bulk density (g) average of 2.18 g/cm3, angular value of soil shear value (f) of 26.19˚ and the value of coherence between cohesion soil particles (c) 0.09 kN/m2, in the Autocad 2018 software a 1: 1 slope dimension is obtained the excavation volume of 1,594 m3, an embankment of 1,830.26 m3 and landslide area of 1,000.30 m2. Based on calculations using the simplified Bishop Method, it is obtained the value of the safety factor (safety factor) 1.83 so that the planned slope is stable","PeriodicalId":55725,"journal":{"name":"Rona Teknik Pertanian","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46450285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kajian Perubahan Geomorfologi Pesisir Kabupaten Aceh Jaya Mengunakan Sistem Informasi Geografis","authors":"Yuliana Syahputri, M. Rusdi, S. Sugianto, Faisal Faisal, M. Irham","doi":"10.17969/RTP.V14I2.22338","DOIUrl":"https://doi.org/10.17969/RTP.V14I2.22338","url":null,"abstract":"Kecamatan Sampoiniet dan Setiabakti Kabupaten Aceh Jaya merupakan daerah yang dilanda Gempa dan Tsunami pada 26 Desember 2004. Dampak dari Tsunami telah mengubah geomorfologi pada sebagian wilayah pesisir Kecamatan tersebut. Tujuan dari penelitian ini menganalisis dan membandingkan perubahan garis pantai berdasarkan data citra satelit secara multi temporal memanfaatkan Sistem Informasi Geografis (SIG) info  pada tahun sebelum Tsunami yaitu Tahun 2004 dan tahun setelah Tsunami yaitu Tahun 2008 dan 2017. Dampak kerusakan akibat dari Tsunami terutama terjadi pada kawasan pesisir. Penelitian ini dilakukan dengan menggunakan metode Deskriptif dengan melakukan pengumpulan data citra pada periode yang berbeda pada tahun 2004, 2008 dan 2017. Wilayah kajian meliputi kawasan pantai yaitu kecamatan yaitu Kecamatan Sampoiniet dan Kecamatan Setiabakti.  Penelitian dilakukan untuk mengamati perubahan panjang garis pantai secara multitemporal yaitu pada tahun 2004, 2008 dan 2017. Hasil penelitian menunjukkan adanya pebubahan Panjang garis pantai dari Tahun 2004 yaitu 50,42 km, menjadi 54,68 km  pada tahun 2008 dan  bertambah menjadi 55,30 km pada tahun 2017.","PeriodicalId":55725,"journal":{"name":"Rona Teknik Pertanian","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43254104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluasi Kesesuaian Peruntukan Lahan di Sempadan Sungai Krueng Lamnyong, Provinsi Aceh","authors":"D. Dahlan, Iqbar Iqbar, Eka Dyah Puspita Sari, Nizamuddin Nizamuddin","doi":"10.17969/RTP.V14I2.23188","DOIUrl":"https://doi.org/10.17969/RTP.V14I2.23188","url":null,"abstract":"Abstrak. Sempadan sungai merupakan kawasan penyangga antara ekosistem perairan (sungai) dan daratan. Sungai Krueng Lamnyong terletak di Kota Banda Aceh dan Kabupaten Aceh Besar yang merupakan daerah hilir dari sungai Krueng Aceh. Sempadan sungai Krueng Lamnyong telah dimanfaatkan oleh berbagai pihak untuk berbagai peruntukan. Penelitian ini bertujuan untuk mengevaluasi kesesuaian peruntukan lahan sempadan sungai Krueng Lamnyong berdasarkan peraturan perundang-undangan. Identifikasi serta evaluasi peruntukan lahan di sempadan sungai Krueng Lamnyong menggunakan perangkat lunak Sistem Informasi Geografis (SIG). Hasil penelitian menunjukkan bahwa penggunaan sempadan sungai Krueng Lamnyong diperoleh 10 jenis penggunaan lahan. Penggunaan sempadan sungai Krueng Lamnyong yang teridentifikasi sesuai dengan peruntukan yaitu sebesar 110,91 Ha atau 68,13% yang terdiri dari irigasi, jalan, sawah, rerumputan, tanaman palawija dan tanah kosong. Penggunaan yang tidak sesuai peruntukan sebesar 51,88 Ha atau 31,87% yang terdiri dari ruang terbangun, kebun, vegetasi mangrove dan kanopi pohon.Evaluation of Land Use Suitability in Aceh Province's Krueng Lamnyong River BorderAbstract. The river border is a buffer area between aquatic ecosystems (rivers) and land. The Krueng Lamnyong River is located in Banda Aceh City and Aceh Besar District which is the downstream area of the Krueng Aceh river. The Krueng Lamnyong river border has been used by various parties for various purposes.  This study aims to evaluate the suitability of the land use of the Krueng Lamnyong river border based on the legislation. Identification and evaluation of land use in the Krueng Lamnyong river border using Geographic Information System (GIS) software. The results showed that the use of the Krueng Lamnyong river border obtain 10 types of land use. The use of the Krueng Lamnyong river border identified according to its designation is 110.91 Ha or 68.13% consisting of irrigation, roads, rice fields, grass, crops, and vacant land. The use that is not in accordance with the designation is 51.88 Ha or 31.87% consisting of build space, gardens, mangrove vegetation, and tree canopies.","PeriodicalId":55725,"journal":{"name":"Rona Teknik Pertanian","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42100427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kajian Karakteristik Proses Pengomposan Limbah Tanaman Jagung Yang Diberi Tambahan Kipahit Dan Pupuk Kandang Kambing","authors":"Sophia Dwiratna, Edy Suryadi, Dwi Rustam Kendarto, Kharistya Amaru, Wahyu Kristian Sugandi, Azhari Dwi Pramesti","doi":"10.17969/RTP.V14I2.22483","DOIUrl":"https://doi.org/10.17969/RTP.V14I2.22483","url":null,"abstract":"Abstrak. Limbah pertanian jagung yang belum dimanfaatkan dengan baik dapat menyebabkan timbunan limbah yang mempersempit area penanaman selanjutnya. Salah satu pemanfaatan limbah tanaman jagung adalah dengan cara dikomposkan. Pengomposan dilakukan dengan penambahan tanaman kipahit dan pupuk kandang kambing untuk mengoptimalkan proses pengomposan. Penelitian ini bertujuan mengetahui karakteristik proses pengomposan menggunakan metode berkeley. Pengamatan dilakukan pada pengondisian bahan awal kompos dengan rasio C/N 30, 35 dan 40. Penelitian mendapatkan semakin rendah penyesuaian rasio C/N awal pengomposan maka suhu puncak proses pengomposan semakin tinggi. Proses pengomposan membentuk fase termofilik dengan titik tertinggi 63,3oC pada bioreaktor A. Proses pengomposan pada bioreaktor B  mengalami fase termofilik paling lama yaitu 18 hari dan reduksi volume terbanyak yaitu 78,9%. Akhir pengomposan pada bioreaktor A, B dan C menghasilkan pH yang alkali dan rasio C/N  berturut-turut 13,5, 10 dan 15,5. Parameter di atas telah sesuai dengan standar baku mutu kriteria pupuk organik padat SNI 7763:2018.Characteristics Study Of Corn Waste Composting Process With Tithonia And Sheep Manure Addition Abstract. Corn waste that was not used properly into waste stack which will reduce the area of the upcoming planting. Composting is one of the ways for corn waste management. Corn waste composting is carried out by adding tithonia and goat manure to optimize the process. The objective of the study is to determine the characteristics of composting process by using the Berkeley method. The observations were undertaken at various initial composting material C/N ratio 30, 35 and 40. Base on the study result, the lower C/N ratio, the higher thermophilic peak.. The composting process forms the highest peak temperature thermophilic  at 63.3oC in bioreactor A. The composting process in bioreactor B has longest thermophilic phase (18 days) and the biggest reduction (78.9%). The last characteristics were observed are composting process in bioreactor A, B and C results in alkaline pH and  C/N ratio 13.5, 10, and 15.5, respectively. The parameters above have qualified SNI 7763:2018.","PeriodicalId":55725,"journal":{"name":"Rona Teknik Pertanian","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48224027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perubahan Sifat Fisika Dan Kimia Tanah Pada Lahan Kering Akibat Perlakuan Bahan Organik dan Kapur Dolomit","authors":"Zulfakri Zulfakri, Y. Yusrizal, Angga Defrian, Muhammad Nasir","doi":"10.17969/RTP.V14I2.23159","DOIUrl":"https://doi.org/10.17969/RTP.V14I2.23159","url":null,"abstract":"Abstrak. Penelitian ini dilaksanakan untuk mengetahui perubahan sifat fisika dan kimia tanah pada lahan kering akibat perlakuan bahan organik dan kapur dolomit. Metode yang digunakan adalah rancangan acak kelompok (RAK) faktorial dengan 2 (dua) faktor yang terdiri dari kapur dolomit pada taraf 0 ton/ha, 0,8 ton/ha dan 1,6 ton/ha, dan bahan organik pada taraf 0 ton/ha, 6 ton/ha dan 12 ton/ha dengan 3 (tiga) kali pengulangan. Hasil dari penelitian ini menunjukkan bahwa pada perlakuan bahan organik mampu memperbaiki sifat fisika dan kimia tanah dimana stabilitas agregat, porositas total, C-organik dan pori drainase cepat menjadi meningkat serta mampu menurunkan bulk density dibandingkan dengan tanpa perlakuan bahan organik.CHANGES IN PHYSICAL AND CHEMICAL PROPERTIES OF SOIL ON DRY LAND DUE TO ORGANIC MATERIALS AND DOLOMIT LIMEAbstract. This research was conducted to determine changes in physical and chemical properties of soil on dry land due to the application of organic matter and dolomite lime. This study used  factorial randomized block design (RAK) consisting of 2 (two) factors, namely dolomite lime at levels 0, 0.8 and 1.6 tons/ha, while organic matter at levels 0, 6, and 12 tons/ha. with 3 (three) repetitions. The results showed that the organic matter treatment was able to improve the physical and chemical properties of the soil in which the total porosity, aggregate stability, fast drainage pores and organic C were increased and were able to decrease the bulk density compared to without the addition of organic matter. ","PeriodicalId":55725,"journal":{"name":"Rona Teknik Pertanian","volume":"211 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41290682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimasi Umur Simpan Pliek-U Berdasarkan Kadar Air Menggunakan Model Arrhenius dan Metode Q10","authors":"Rita Khathir, Riska Jannati, Raida Agustina","doi":"10.17969/RTP.V14I2.20518","DOIUrl":"https://doi.org/10.17969/RTP.V14I2.20518","url":null,"abstract":"Abstrak. Penelitian ini bertujuan untuk menduga umur simpan  Pliek-U  menggunakan model Arrhenius dan metode Q10. Sebanyak 6 sampel Pliek-U yang sudah diketahui kadar air awalnya diberikan perlakuan suhu ekstrim 50, 60, dan 70˚C sampai kondisi Pliek-U mengalami penurunan mutu yang ditandai dengan perubahan warna dan bau. Perubahan berat sampel diamati dalam interval 30 menit. Selanjutya dilakukan perhitungan kadar air Pliek-U dan nilainya diplotkan dalam grafik di mana koordinat x nya sebagai waktu dan koordinat y nya sebagai kadar air. Gradien grafik adalah laju reaksi perubahan kadar air Pliek-U (k). Model Arrhenius adalah hasil plot nilai ln k terhadap 1/T dalam skala Kelvin. Selanjutnya dihitung nilai Q10 dan umur simpan Pliek-U dengan asumsi bahwa umur simpan sampel pada suhu ruang (30ºC) adalah 32 bulan. Hasil penelitian ini menunjukkan nilai k Pliek-U pada suhu 50ºC 0,0621 dan nilai R2 sebesar 15,52%. Nilai k Pliek-U pada suhu 60ºC adalah 0,0826 dan nilai R2 sebesar 67,9%, dan nilai k Pliek-U pada suhu 70ºC adalah 0,0877 dan nilai R2 sebesar 54,39%. Persamaan Arrhenius Pliek-U berdasarkan perubahan kadar air adalah k = 27,454 . e-1.925(1/T) dengan R2 sebesar 91,47%. Nilai faktor percepatan reaksi (Q10) Pliek-U adalah 1,214. Umur simpan Pliek-U dapat ditentukan dengan persamaan tT1=32 .1,214(∆T/10).Shelf-life estimation of Pliek-U based on moisture changes by using Arrhenius and Q10 approachAbstract. The study aimed to predict the shelf-life of Pliek-U by using Arrhenius and Q10 approach. About 6 samples of Pliek-U, already known its moisture, were exposed to high temperatures of 50, 60, dan 70ºC to reach degradation quality characterized by color and odor changes. The alteration of weight was also observed at interval of 30minutes. Based on these data, the changes of moisture were calculated and the trend was drawn on a XY scatter chart. The gradien of the chart was the reaction rate of quality degradation (k). Then, the Arrhenius model was constructed by plotting ln k and 1/T (K) into a graph. Lastly, the Q10 and shelf-life were calculated by using assumption that the shelf-life at room temperature was about 32 months. Results showed that the k-value and R-square of Pliek-U at 50˚C was 0.0621 and 15.52%, respectively. The k-value and R-square of Pliek-U at 60˚C was 0,0826 and 67,9%, whereas the k-value and R-square of Pliek-U at 70˚C was 0,0877 and 54,39%. The Arrhenius model of Pliek-U based on moisture changes was k = 27,454. e-1.925(1/T) and R-square was 91.47%. The Q10-value of Pliek-U was 1,214 and the shelf-life of Pliek-U can be adjusted by using the model tT1=32 .1,214(∆T/10).","PeriodicalId":55725,"journal":{"name":"Rona Teknik Pertanian","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44842710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluasi Pengaruh Rehabilitasi Lahan Dan Hutan Terhadap Koefisien Aliran Tahunan Di Sub Das Krueng Meuleusong","authors":"Herry Andrisa, H. Basri, M. Rusdi","doi":"10.17969/RTP.V14I2.21994","DOIUrl":"https://doi.org/10.17969/RTP.V14I2.21994","url":null,"abstract":"Abstrak. Penelitian ini bertujuan untuk mengetahui pengaruh rehabilitasi lahan dan hutan (RHL) terhadap nilai koefisien aliran tahunan (KAT) di sub-DAS Krueng Meulesong. Pelaksanaan RHL di Desa Riting Kecamatan Indrapuri Kabupaten Aceh Besar yang termasuk dalam DAS Krueng Meuleusong dikategorikan tidak berhasil berdasarkan citra satelit perubahan tata guna lahan tahun 2009, 2014, 2017 dan 2019. Hasil interpretasi citra satelit menunjukkan penurunan luasan hutan sekunder, namun luas perdu dan sabana meningkat. Berdasarkan hasil uji korelasi menunjukkan bahwa pelaksanaan kegiatan RHL tidak berpengaruh terhadap perubahan penggunaan lahan menjadi hutan sekunder dan kegiatan RHL tidak berpengaruh terhadap nilai koefisien aliran tahunan (KAT) di Sub-DAS Krueng Meuleusong.Evaluation Of The Effect Of Land And Forest Rehabilitation On Annual Flow Coefficient In Krueng Meuleusong Sub-WatershedAbstract. This study aims to determine the effect of land and forest rehabilitation (RHL) on the value of the annual flow coefficient (KAT) in the Krueng Meulesong sub-watershed. The implementation of RHL in Riting Village, Indrapuri District, Aceh Besar District which is included in the water catchment area of the Krueng Meuleusong sub-watershed is categorized as unsuccessful based on satellite imagery of 2009, 2014, 2017 and, 2019 of land-use change. The results of satellite imagery interpretation showed a decrease in the area of secondary forest, but shrubs and savanna area had increased. Based on the results of the correlation test, shows that the implementation of RHL activities has no effect on changes in land use to secondary forests and RHL activities have no effect on the value of annual flow coefficient (KAT) in the Krueng Krueng Meuleusong sub-watershed.","PeriodicalId":55725,"journal":{"name":"Rona Teknik Pertanian","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41752533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisis dan Pemetaan Limpasan Permukaan di DAS Citanduy Hulu dengan Metode SCSN","authors":"A. Hidayat, Pengki Irawan, Jazaul Ikhsan, Sri Atmadja, Novia Komala Sari","doi":"10.17969/RTP.V14I1.17699","DOIUrl":"https://doi.org/10.17969/RTP.V14I1.17699","url":null,"abstract":"Abstrak. DAS Citanduy merupakan salah DAS yang terbesar di pulau Jawa dengan sungai utama adalah Cintanduy. DAS Citanduy terdiri dari beberapa sub DAS, salah satunya adalah sub DAS Citanduy Hulu. Perubahan tata guna lahan di DAS Citanduy Hulu terus terjadi, kondisi tsb telah mengakibatkan peningkatan debit banjir di sungai. Peningkatan debit di sungai diakibatkan adanya limpasan permukaan akibat hujan. limpasan permukaan dapat dianalisis menggunakan metode SCS (Soil Conservation Service). Metode SCS juga dianalisis berdasarkan kondisi tanah, sehingga dapat menentukan nilai Curve Number (CN) dari lahan. Hasil analisis tahun 2018, menunjukkan bahwa tutupan lahan 18,99% atau 13.735,97 ha berupa hutan (hutan primer, sekunder dan hutan tanaman). Sebaran jenis tanah di umumnya adalah Typic Dystrudepts (36,57%) dan Typic Hapludands (37,93%). Hydrological Soil Group (HSG) di DAS Citanduy Hulu didominasi oleh klas B sebesar 76, 92 %. Hasil analisis didapatkan bahwa DAS Citanduy Hulu tebal runoff maksimum pada PUH 2, 5, 10, 25, dan 50 tahun secara berurutan adalah 104 mm, 133 mm, 147 mm, 171 mm dan 187 mm. Tebal limpasan permukaan minimum dengan PUH 2, 5, 10, 25 dan 50 tahun secara berurutan adalah 17 mm, 31 mm, 39 mm, 53 mm dan 64 mm. Tebal limpasan permukaan menunjukkan potensi peningkatan debit banjir.Analysis And Mapping Runoff In Watershed Upper Citanduy With SCSN MethodAbstract. Citanduy watershed is one of the largest watersheds on the island of Java with the main river being Cintanduy. The Citanduy watershed consists of several sub-watersheds, one of which is the Upper Citanduy sub-watershed. Changes in land use in the Upper Citanduy watershed continue to occur, this condition has resulted in an increase in flood discharge in the river. The increase in discharge in the river is caused by surface runoff due to rain. Surface runoff can be analyzed using the SCS (Soil Conservation Service) method. The SCS method is also analyzed based on soil conditions so that it can determine the Curve Number (CN) value of the land. The results of the 2018 analysis show that 18.99% or 13,735.97 ha of land cover is forest (primary, secondary and plantation forests). The distribution of soil types, in general, is Typic Dystrudepts (36.57%) and Typic Hapludands (37.93%). Hydrological Soil Group (HSG) in the Upper Citanduy watershed is dominated by class B by 76.92%. The results of the analysis showed that the maximum runoff thickness of the Upper Citanduy Watershed at PUH 2, 5, 10, 25, and 50 years respectively was 104 mm, 133 mm, 147 mm, 171 mm, and 187 mm. The minimum surface runoff thickness with PUH 2, 5, 10, 25, and 50 years respectively is 17 mm, 31 mm, 39 mm, 53 mm, and 64 mm. The thickness of the surface runoff indicates the potential for increased flood discharge.","PeriodicalId":55725,"journal":{"name":"Rona Teknik Pertanian","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47775778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisis Karakteristik Hidrologi DAS Krueng Aceh, Provinsi Aceh (Studi Kasus Sub DAS Krueng Jreu dan Sub DAS Krueng Khea)","authors":"Darwin Darwin, S. Syahrul, H. Basri","doi":"10.17969/RTP.V14I1.21606","DOIUrl":"https://doi.org/10.17969/RTP.V14I1.21606","url":null,"abstract":"Abstrak. Perilaku air (hidrologi) sungai dalam suatu DAS dipengaruhi oleh penggunaan lahan sebagai akibat adanya aktivitas manusia. DAS Krueng Aceh merupakan salah satu DAS yang terdapat di Provinsi Aceh menjadi sumber air utama bagi penduduk Kota Banda Aceh dan Kabupaten Aceh Besar di Provinsi Aceh. Luasan tutupan lahan berupa hutan primer saat ini semakin berkurang luasannya. Penelitian ini bertujuan menganalisis karakteristik hidrologi Sub DAS Krueng Jreu dan Krueng Khea di DAS Krueng Aceh dan pengaruhnya dengan perubahan tutupan lahan. Hasil pengolahan data diperoleh bahwa limpasan permukaan tertinggi pada Sub DAS Krueng Jreu terjadi sebesar 2.178,3 mm/bulan yaitu pada bulan Januari tahun 2015 dan limpasan terendah terjadi pada bulan Maret tahun 2014 yaitu sebesar 1 mm/bulan. Sedangkan pada Sub DAS Krueng Khea limpasan permukaan terbesar yaitu 204 mm/bulan yang terjadi pada bulan Juli tahun 2015 sedangkan limpasan terkecil sebesar 4,9 mm/bulan yang terjadi pada bulan Agustus  tahun 2018. Tidak terjadi perubahan penutupan lahan yang signifikan pada kedua Sub DAS dari tahun 2014 sampai dengan 2018.Analysis of Hydrological Characteristics of the Krueng Aceh Watershed, Aceh Province (Case Study of the Krueng Jreu and Krueng Khea sub-watersheds)Abstract. The behavior of river water (hydrology) in a watershed is not only influenced by land use as a result of human activities. Krueng Aceh watershed is one of the watersheds in Aceh Province. The watershed is the main water source for residents of Banda Aceh City and Aceh Besar District in Aceh Province. The condition of land cover in the form of primary forest is currently decreasing in area. This study aims to analyze the hydrological characteristics of the Krueng Jreu and Krueng Khea watersheds in the Krueng Aceh watershed and their effect on land cover changes. From the results of data processing, it was found that the highest surface runoff in the Krueng Jreu watershed occurred at 2,178.3 mm/month in January 2015 and the lowest runoff occurred in March 2014 at 1 mm/month. While in the Krueng Khea Sub-watershed the largest surface runoff was 204 mm/month which occurred in July 2015 while the smallest runoff was 4.9 mm/month which occurred in August 2018. There was no significant change in land cover in the two sub-watersheds from 2014 to 2018.","PeriodicalId":55725,"journal":{"name":"Rona Teknik Pertanian","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47636600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rancang Bangun Alat Pemipih Emping Melinjo (Gnetum gnemon) Tipe Mekanis","authors":"M. Dhafir, Zulfahrizal Zulfahrizal, Rahmat Fadhil, Safrizal Safrizal, Mutiawati Mutiawati","doi":"10.17969/RTP.V14I1.19651","DOIUrl":"https://doi.org/10.17969/RTP.V14I1.19651","url":null,"abstract":"Abstrak. Pengolahan biji melinjo menjadi emping melinjo saat ini sebagian besar masih menggunakan cara tradisional (manual) yaitu dengan memukul-mukul biji melinjo menggunakan palu yang sebelumnya sudah disangrai dengan pasir. Teknik ini dirasakan tidak efektif karena memerlukan waktu yang cukup lama dan tenaga manusia yang besar. Untuk mengatasi masalah tersebut perlu dibuat suatu mesin untuk memudahkan dalam pemipihan biji melinjo. Penelitian ini bertujuan untuk desain mesin pemipih emping melinjo dengan sumber tenaga motor listrik,  menguji fungsional dan kinerja mesin serta membandingkannya dengan  metode tradisional. Parameter yang diamati meliputi kapasitas kerja mesin serta persentase kehilangan hasil. Hasil penelitian diperoleh bahwa mesin pemipih emping melinjo tipe tumbukan mempunyai ukuran panjang 820 mm, lebar 520 mm dan tinggi 1010 mm, digerakkan dengan motor listrik dengan daya 1.5 hp 1450 rpm. Hasil pengujian mesin didapatkan kapasitas pemipihan 0.83 kg/jam sedangkan kapasitas secara manual 0.16 kg/jam. Persentase kehilangan hasil dari pemakaian mesin pemipih emping ini adalah 1.5 %  sedangkan dengan cara manual adanya kehilangan hasil yaitu sebesar 7 %.  Design and Performance Test Of Flatter Machines  Impact Type for Melinjo (Gnetum gnemon)Abstract. Flatteting of melinjo seeds into melinjo chips at this time most still use the manual method by beating the seeds of melinjo using a hammer that was previously roasted with sand. This technique is felt to be ineffective because it requires a long time and a large amount of human energy. To overcome these problems, a solution is needed to facilitate flattening the seeds of melinjo. This study aims to design melinjo chips flattening machine with an electric motor as a power source, to test the functionality and performance of the machine, and to compare it with traditional methods. The parameters observed include the machine's working capacity and the percentage of yield loss. The results showed that this flatter machines impact type for melinjo has a length of 820 mm, the width of 520 mm, and a height of 1010 mm, driven by an electric motor with a power of 1.5 HP with a rotation of 1450 rpm. The results of testing the device obtained a flaking capacity of 0.83 kg/hour while the capacity manually was 0.16 kg/hour. The percentage of loss of results from the use of this emping flask is 1.5% while by manual the loss of results is equal to 7%.","PeriodicalId":55725,"journal":{"name":"Rona Teknik Pertanian","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44115151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}