Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)
https://jurnal.fp.unila.ac.id/index.php/JTP
<p>Jurnal Teknik Pertanian Lampung or Journal of Agricultural Engineering (JTEP-L) is a peer-reviewed open-access journal. The journal invites scientists and engineers throughout the world to exchange and disseminate theoretical and practice-oriented researches in the whole aspect of Agricultural Enginering including but not limited to Agricultural Mechanization, Irrigation, Soil and Water Engineering, Postharvest Technology, Renewable Energy, Farm Structure, and related fields. The first issue was published in October 2012 by Department of Agricultural Engineering, Faculty of Agriculture, University of Lampung.</p><p>Jurnal Teknik Pertanian Lampung has ISSN number 2302 - 559X for print edition on October 10, 2012 then 2549 - 0818 for online edition on January 10, 2017. Jurnal Teknik Pertanian Lampung is issued periodically four times a year in <strong>March</strong>, <strong>June</strong>, <strong>September</strong>, and <strong>December</strong>.</p><p>Jurnal Teknik Pertanian Lampung has been indexed by Google Scholar, Crossref, Directory Open Access Journals (DOAJ), and CABI. Since Volume 5 Issue 1 (2016) Jurnal Teknik Pertanian Lampung has been accredited as SINTA 3 by Directorate General of Higher Education (DIKTI). Starting Volume 10 Issue 3 (2021) the journal received accreditation <strong>SINTA 2</strong>.</p>The University of Lampungen-USJurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)2302-559X<ol type="a"><ol type="a"><li>Authors who publish with this journal agree to the following terms:<br /><br /></li><ol type="a"><ol type="a"><li>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a <a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license">Creative Commons Attribution-ShareAlike 4.0 International Lice</a> that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</li><li>Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</li><li>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See <a href="http://opcit.eprints.org/oacitation-biblio.html" target="_new">The Effect of Open Access</a>).</li><li><p><a href="http://statcounter.com/p11317193/summary/?account_id=5354174&login_id=5&code=321a4da9797d97381afd08384264e061&guest_login=1" target="_blank">J</a>urnal Teknik Pertanian Lampung</p><p><a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license"><img src="https://i.creativecommons.org/l/by-sa/4.0/88x31.png" alt="Creative Commons License" /></a><br />JTEPL is licensed under a <a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license">Creative Commons Attribution-ShareAlike 4.0 International License</a>.</p></li></ol></ol></ol></ol>Cover Vol 13 No 1, March 2024
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/8603
Agus Haryanto
Copyright (c) 2024 Agus Haryanto
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13110.23960/jtep-l.v13i1.%pSpring Water Catchment Building and Water Distribution System for Domestic Needs
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7985
<p>The population growth implies that the population's need for clean water tend to increase. Clean water availability is not optimal due to geographical factors and discharge reductions during dry season. This research was conducted to design spring water catchment building and water distribution system at Kalikajar Village, Wonosobo. The population data, water demand, and spring discharge were utilized in this research. The population growth was calculated with arithmetic, geometric, exponential, and logistic method. Then water demand was calculated based on SNI 19-6728.1-2002. The population growth which predictably reaches 5328 people in 2050 will result in increasing clean water demand by 9.68% with domestic water demand of 4.63 L/s. The spring discharge measured at the research location showed an average of 10.80 L/s. Therefore, the spring discharge is able to meet the population needs in the projected year. The spring catchment building was designed with Type B, while three reservoir were designed with the capacity of 7 m<sup>3</sup> each. The water distribution is designed with gravity system because the elevation difference between the spring and the village is more than 10 m. The PVC pipeline used diameter of 100 – 150 mm, with total length of 11843 m. The design meets the calculated requirement and could be implemented.</p><p> </p><p><strong>Keywords: </strong><strong> </strong><em>Distribution system, </em><em>Reservoir, </em><em>Spring water, </em><em>Hilly areas, </em><em>Water consumption</em></p>Achmad Yopi Suyitno PribawantoNora Herdiana PandjaitanSutoyo Sutoyo
Copyright (c) 2024 Achmad Yopi Suyitno Pribawanto, Nora Herdiana Pandjaitan, Sutoyo Sutoyo
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2024-01-262024-01-2613111110.23960/jtep-l.v13i1.1-11The Effect of Fermentation Time on The Quality of Mocaf (Modified Cassava Flour) with Raw Material Bokor Genotype Cassava
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7173
<p>Cassava genotype Bokor has a fairly high content of beta carotene, which is beneficial for health and can also support the development of the functional food industry. MOCAF (Modified Cassava Flour) is a product made from cassava flour which is processed by modifying cassava cells through fermentation. This study aims to analyze the effect of long fermentation time on the characteristics of MOCAF from beta-carotene-rich cassava genotype Bokor. In this study, three variations of fermentation time were used, namely 15 hours, 24 hours and 40 hours. The research results showed that the time of fermentation affected the physicochemical properties of MOCAF. NIR analysis showed that the fermentation time affected the chemical composition of MOCAF. At 40 hours (last time of fermentation), there was a decrease in fat content with a value of 1.59% and an increase in water, protein and fibre content with a value of 13.71%, 3.94% and 2.28%, respectively. Proximate analysis showed that there was an effect of the length of fermentation time on the MOCAF content, namely at 40 hours, there was an increase in water content with a value of 10.10%, a decrease in dry matter, ash, protein, fat, fibre with a value of 89.90%, 0.60%, 0.78% respectively, 0.45%, and 1.29%. Scanning Electron Microscope (SEM) analysis shows the effect of fermentation time on the morphological properties of MOCAF starch granules. The longer the fermentation time, the more perforated or damaged the surface of the starch granules.</p><p> </p><p><strong>Keywords:</strong> Fermentation time, MOCAF flour, NIR (Near Infrared), Proximate, SEM (Scanning Electron Microscope) </p>Erfa Kurnia PrastiwiRois FatoniAhmad FathoniR. Haryo Bimo SetiartoEma Damayanti
Copyright (c) 2024 Erfa Kurnia Prastiwi, Rois Fatoni, Ahmad Fathoni, R. Haryo Bimo Setiarto, Ema Damayanti
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2024-01-292024-01-29131122610.23960/jtep-l.v13i1.12-26Inorganic Nutrient Composition and Frequency of Ratoon on Kangkong (Ipomoea reptans Poir) in Pot Trial Using Ultisol Media for Urban Farming
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/6536
<p>Kangkong (<em>Ipomoea reptans</em>) is a type of vegetable that is quite easy to cultivate. Cultivation of kangkong with a ratoon system is more efficient in cultivation time and input, and harvesting can be done more than once. Yield of ratoon cultivation system is influenced by ratoon frequency and nutrition. This study aims to determine the effect of inorganic nutrient composition and ratoon frequency. The research was conducted from January to March 2022 at the University of Bangka Belitung. The research method used factorial Completely Randomized Design (CRD). The first factor was the composition of inorganic nutrients, consisting of N1 (AB mix), N2 (NPK + Gandasil D), and N3 (NPK + Growmore). The second factor is the frequency of ratoon, consisting of R0 (no ratoon), R1 (ratoon frequency of 1), R2 (ratoon frequency of 2), and R3 (ratoon frequency of 3). The results revealed that treatment combinations had no significant effect on all observed variables. Composition of inorganic nutrients have a significant effect on root variables with the AB mix treatment as the best. Ratoon frequency treatment had a significant effect on almost all variables (except total number of leaves) with the best treatment being without ratoons (R0). The average total number of leaves of kangkong plants showed the highest yield in the N3R3 treatment, reaching 14.52 strands and the lowest yield in the N1R1 treatment with 12.81 strands.</p><p> </p><p><strong>Keywords: </strong> Kangkong, Inorganic nutrient, Ratoon frequency, Plant growth, Yield, </p>Nyayu Siti KhodijahUlfa Riska NingsihUlfa Riska NingsihRatna Santi Santi
Copyright (c) 2024 Nyayu Siti Khodijah, Ulfa Riska Ningsih, Ulfa Riska Ningsih, Ratna Santi Santi
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2024-01-292024-01-29131273610.23960/jtep-l.v13i1.27-36Resistance Analysis of Padi Gogo Merah (Oryza Nivara L) Against Blast Disease
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7221
<p>Rice Blast has been known as the main disease on paddy which has high severity leading to economic loss. Exploring rice resistance can be an effective way to improve productivity and prosperity toward this staple crop. This study aims to determine several local varieties which have potential for productions and resistances. This study used factorial randomized block design (RBD) consisting of 2 factors including plant spacing (25 x 25 cm; 25 x 30 cm; 25 x 40 cm); Upland rice variety MSP 17, Sigambiri Merah, Hamparan Perak and Kambiri Lumat. The results of the study reveal that variety has a significant effect on disease intensity especially Sigambiri Merah but not on Kembiri Lumat. However, there is no significant effect of spacing on blast intensity except in grain weight. Conclusion of this research was the varieties (V) selection of red upland rice is the best strategy to improve rice resistance toward blast disease.</p><p> </p><p><strong>Keywords:</strong> Disease density, Paddy, Staple Crop. </p>Zulheri NoerDeni MudsanRizal AzizIfan Aulia Candra
Copyright (c) 2024 Zulheri Noer, Deni Mudsa, Rizal Aziz, ifan aulia candra
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2024-01-262024-01-26131374810.23960/jtep-l.v13i1.37-48Effect of Drought Periods on Rice Lines Growth and Yield
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7692
<p>Numerous variables, such as drought period, growth stage, and varieties, influence rice growth and yield in response to drought. This study was conducted to determine the effect of drought periods on the growth and yields of several rice lines and varieties as well as to select drought-tolerant lines. Using a split-plot design with three replications, the pot experiment was carried out in the greenhouse from December 2015 to April 2016 at the Sukamandi Experimental Site of Indonesian Center for Rice Research (BB Padi). Drought periods were treated as the main-plot, while the rice lines/varieties were treated as sub-plots. The main-plot consists of four levels: control, drought at the maximum tillering stage, drought at the primordia stage, and drought at the grain filling stage. The rice lines used are expand lines of rainfed lowland rice and upland rice from the BB Padi breeding program. The results showed that of the 36 rice lines and 6 varieties tested, drought periods during maximum tillering and primordia affected plant height, while the tiller number was not affected by all drought periods. From the yield characters, drought periods increased unfilled grain percentage and decreased 1000 grains weight and also grain weight per plant. Jatiluhur is consistently tolerant and has the highest yield. There are 8 rice lines with consistent tolerance and not significantly different yields with Jatiluhur: B13650E-TB-80-2, B14168E-MR-6, B14168E-MR-10, B14168E-MR-11, B14168E-MR-12, B14168E-MR-13, B12480D-MR-7-1-1, and B12056F-TB-1-29-1.</p><p> </p><p><strong>Keywords: </strong> Drought periods, Rice lines, Growth, Yield </p>Swisci MargaretNafisah NafisahSujinah SujinahIndrastuti Apri RumantiNani Yunani
Copyright (c) 2024 Swisci Margaret, Nafisah Nafisah, Sujinah Sujinah, Indrastuti Apri Rumanti, Nani Yunani
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2024-01-292024-01-29131495910.23960/jtep-l.v13i1.49-59Shelf-life Estimation of Dried Chili in Vacuum Packaging
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7546
<p>This research aimed to build a model for estimating the shelf life of dried chilies in vacuum packaging stored at any storage temperature. The shelf-life estimation of dried red chilies was carried out based on the change rate of dried chilies quality parameters using the ASLT (Accelerated Shelf-Life Testing) method with the Arrhenius approach. The shelf-life estimation using the ASLT method was carried out by conditioning the storage room, which could accelerate the degradation reaction, stored at temperatures above room temperature. Prior to storage, red chilies were dried until their moisture content reaches 10%. Then it was packaged in vacuum packaging made of PE (polyethylene) plastic and stored at 35°C. During the storage period, the observation was conducted on some quality parameters, namely moisture content, color, and vitamin C content. The same experiments were also carried out at 40°C, 45°C, and 50°C to obtain different rate constant values. The shelf-life estimation results from the Arrhenius equation model were selected based on the critical parameter, in this study the critical parameter was the decrease of vitamin C content. The shelf life of dried red chilies that were packed in vacuum stored at room temperature (25°C) could maintain its quality up to 365 days.</p><p> </p><p><strong>Keywords:</strong> Arrhenius, ASLT, Red chili, Vacuum packaging, Shelf life, </p>Nanda Wisha RanawatiUsman AhmadDyah Wulandani
Copyright (c) 2024 Nanda Wisha Ranawati, Usman Ahmad, Dyah Wulandani
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2024-01-292024-01-29131607010.23960/jtep-l.v13i1.60-70The Prediction of Nitrogen, Phosphate, and Potassium Contents of Oil Palm Leaf Using Hand-Held Spectrometer
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7612
<p>A hand-held spectrometer can be used to evaluate oil palm (Elaeis guineensis Jacq.) leaf nutrient contents without being destructive. This study aims to develop regression equations and analyze the performance of the prediction models for Nitrogen, Phosphate, and Potassium leaf nutrient contents. The dependent variable in this study was the result of the analysis of nutrient contents in frond number 17 which was carried out in the laboratory, while the independent variable was the leaf reflectance value scanned with a hand-held spectrometer. The Normalized Difference approach is used to create a vegetation index from the combination of reflectance values at two wavelengths. Vegetation index with the highest correlation value to the nutrient content of leaves, is used to make a prediction model for leaf nutrients using the Simple Linear Regression. The regression equations formed to predict the contents of nutrients N, P, and K have high R<sup>2</sup>. The RMSE values of the predicted contents of N, P, and K nutrients, respectively were 0.21, 0.01, and 0.13; and correctness values of those nutrients respectively were 93.29%, 95.5%, and 88.81%.</p><p> </p><p><strong>Keywords:</strong> Hand-held spectrometer, Oil palm, Prediction, Leaf nutrients contents. </p>Badi HariadiHermantoro SastrohartonoAndreas Wahyu KrisdiartoSukarman SukarmanSepta PrimanandaTri Haryo Sagoro
Copyright (c) 2024 Badi Hariadi, Hermantoro Sastrohartono, Andreas Wahyu Krisdiarto
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2024-01-292024-01-29131718110.23960/jtep-l.v13i1.71-81Effect of Canopy Cover Level of Cacao and Shade Trees on Splash Erosion On Cacao Land
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7780
<p>In smallholder cacao plantations, the protective crops used varied, so they have different effects on splash erosion. The management of land cover with a canopy of cacao and shade trees on cacao fields, aims to control of splash erosion. This study was conducted by directly measuring the magnitude of splash erosion under several levels of canopy cover. The magnitude of splash erosion was determined by measuring the depth of the eroded soil using the bottle cap method. The measurements were carried out every rain event (46 rain events with rainfall varied from 0.28 to 97.04 mm). The canopy cover level was determined by analyzing the images taken using a digital camera. The images were processed by Matlab software with closure approach. The data were analyzed by regression analysis to determine the relationship between canopy cover level and the depth of splash erosion that occurred. The results showed that the level of canopy cover influence the depth of splash erosion. In addition, this study indicates that the level of splash erosion not only influenced by the level of closure and rainfall, but also strongly influenced by the size of the leaf cover.</p><p> </p><p><strong>Keywords: </strong><em>Cacao plantation, </em><em>Canopy cover, </em><em>Regression analysis, </em><em>Splash erosion.</em></p>Suhardi SuhardiAhmad MunirMuhammad Tahir SapsalSitti Nur FaridahIqbal IqbalSyahrial Sabaniah
Copyright (c) 2024 Suhardi Suhardi
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2024-01-262024-01-26131829110.23960/jtep-l.v13i1.82-91The Effect of Media Composition on The Change of Bag Log Waste Composition and Production of Oyster Mushroom
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/6855
<p>OPEFB has low biodegradability so its utilization is very limited. Oyster mushrooms are mushrooms that are capable of producing enzymes capable of degrading cellulose, hemicellulose, and lignin contained in) OPEFB. The research objective was to determine the effect of the composition of the growing media on the production of oyster mushrooms and changes in the composition of the resulting baglog waste. The study was carried out with the combination treatment of rubber wood and OPEFB, with levels: (a) 100% rubber wood powder and 0% OPEFB, (b) 75% rubber wood powder and 25% OPEFB, (c) 50% rubber wood powder and OPEFB 50%, (d) 25% rubber wood powder and 75% OPEFB, (e) 0% rubber wood powder and 100% OPEFB. Observation of raw material composition, mycelia growth, wet weight of the fungus, biological efficiency, changes in lignin content, cellulose, and hemicellulose before and after being used as a growing medium for oyster mushrooms. The results showed that the fastest mycelial growth occurred in the use of 100% OPEFB media. The highest oyster mushroom production occurred in the media 100% rubber sawdust. The higher the wet weight of the oyster mushrooms produced, the less the weight of the baglog waste produced. The oyster mushroom fermentation process for 60 days was able to reduce the content of 3.39% cellulose, 11.01% hemicellulose, and 1.98% lignin.</p><p> </p><p><strong>Keywords: </strong>OPEFB, Oyster Mushroom, Cellulose, Hemicellulose, Lignin</p>Sarono SaronoYana SukaryanaSri Astuti
Copyright (c) 2024 Sarono Sarono, Yana Sukaryana, Sri Astuti
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2024-01-292024-01-291319210110.23960/jtep-l.v13i1.92-101Characteristics of Residence Time of the Torrefaction Process on the Results of Pruning Kesambi Trees
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7399
<p><em>The excessive use of Kesambi (Schleichera oleosa) tree stems threatens the sustainability of Kesambi plants since it takes several decades for them to regenerate new stems. This research aims to determine the characteristics of torrefied Kesambi tree pruning. The used reactor has a diameter of 400 mm. An iron basket is positioned 100 mm above the reactor base, holding the material within an aluminum cylinder. The reactor temperature is maintained at 300°C using a K-type thermocouple sensor. A heater is placed near the reactor base and covered. The characteristics of the semi-charcoal biomass product are identified, including mass yield, water absorption capacity, moisture content (D3173, 2013); ash content (ASTM D1102-84. Standard Test Method for Ash in Wood, 2013); volatile matter (%) (ASTMD3175, 2011); and fixed carbon (%) (ASTM, 2013). The color of the leaves and the pruned Kesambi tree changes from brown to black as the residence time increases. The results of pruning the Kesambi tree at different torrefaction residence times indicate a decrease in mass yield with an increase in residence time, with the lowest mass yield observed at a residence time of 20 minutes. The water absorption capacity of torrefied Kesambi tree pruning material is found to be between 0.65% and 0.675%, or less than 1% and higher heating value (HHV) prediction 29.0750 MJ/kg.</em></p><p><em><br /></em></p><p><strong>Keywords: </strong><em>Kesambi, </em><em>Pruning, </em><em>Residence, </em><em>Time, </em><em>Torrefaction</em></p><p><em><br /></em></p>Jemmy Jonson Sula DethanFredrik Julius Haba BungaMellissa Erlyn Stephanie LedoJemseng Carles Abineno
Copyright (c) 2024 Jemmy Jonson Sula Dethan
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2024-02-012024-02-0113110211210.23960/jtep-l.v13i1.102-113Effect of Light Intensities and Nitrogen Fertilizer Dosages on Growth, Phenolics, and Flavonoid Production of Adenostemma lavenia
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7243
<p>Adenostemma lavenia (Asteraceae) is a medicinal plant considered a weed, consisted a lot of secondary metabolites, including phenolic and flavonoid. This species has been widely distributed in various countries but has yet to be widely cultivated. Thus, this study aimed to determine the highest plant growth, phenolic, and flavonoid production from A. lavenia cultivated under different shade of nitrogen fertilizers. The experiment used a nested design consisting of 2 factors. The first factor was shade with different intensities (0, 25, 50, and 75%) and the second was nitrogen fertilizer with different doses (0, 45, and 90 kg/ha). The highest plant was achieved at 50% shade level, while the highest leaf number and branch were 25% and 0%, respectively. Leaf thickness and stomata number increased in no-shade conditions. The production of phenolics and flavonoids was high under shaded conditions, supported by significantly high phenolics and flavonoid total under shade conditions, i.e., 35.94 mol gallic acid equivalent/plant and 21.76 mol quercetin equivalent/plant, respectively. A 90 kg/ha nitrogen fertilizer dose produced the best plant growth, phenolic, and flavonoid production.</p><p> </p><p><strong>Keywords: </strong><em>Asteraceae, </em><em>Heatmap, </em><em>Nested design, </em><em>Shade.</em></p>Anisya Elsa ShafiraSandra Arifin AzizMuhammad FaridTaopik RidwanIrmanida Batubara
Copyright (c) 2024 Anisya Elsa Shafira, Sandra Arifin Aziz, Muhammad Farid, Taopik Ridwan, Irmanida Batubara
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2024-02-012024-02-0113111312210.23960/jtep-l.v13i1.114-123Minimize Oil Losses in Palm Oil Mill through Optimalization of Sludge Separator Performance
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7110
<p>One of the most important clarification station engine parts for reducing oil loss is the sludge separator. The sludge separator uses high-speed centrifugal force to capture any oil that is still adhered to the sludge. This study aims to improve the working performance of sludge separator to minimize oil losses through variations in feeding rate, oil under flow and temperature of flow rate. The experiment was conducted at one of the palm oil mills in Central Kalimantan, with a capacity of 45 ton/h. Variations in sludge separator feed rates: 23, 25 and 27 tons/hour. Oil underflow variations: 5%, 6%, and 7%. Feed temperature variations are: 90°C, 93°C, and 95°C. Feed temperature variations: 90°C, 93°C, and 95°C. Based on research that has been done, using bait rate of 23 ton/h, temperature 90 °C, and oil underflows 5%, resulting in oil losses of 0.54% – 0.61%. This study has managed to lower oil losses in the sludge separator by 0.11 % and shows the level of stability below the standard that has been determined.</p><p> </p><p><strong>Keywords: </strong> Crude palm oil, Oil losses, Palm oil mill, Sludge separator, Underflow</p>Nabillah Nissya FadhilahLisma SafitriUlil Albab AlfianNuraeni Dwi DharmawatiRengga Arnalis Renjani
Copyright (c) 2024 Nabillah Nissya Fadhilah, Nabillah Nissya Fadhilah, Lisma Safitri, Lisma Safitri, Ulil Albab Alfian, Ulil Albab Alfian, Nuraeni Dwi Dharmawati, Nuraeni Dwi Dharmawati, Rengga Arnalis Renjani
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2024-02-012024-02-0113112313110.23960/jtep-l.v13i1.123-131Specifications of Sugar Cane Varieties Based on Land Characteristic and Typology
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/6409
<p>The productivity of sugarcane is decreasing and there are more and more varieties in circulation. The decrease in productivity is caused by the incompatibility of each variety of land typology. The purpose of this research is to arrange the right varieties in increasing the productivity of sugarcane. The research method is surveying and matching. Parameters used include soil texture, land type conditions, soil drainage conditions, and rainfall. Based on the research results, the total working area of 11,866.81 ha was divided into 4 land typologies, namely BHJ with an area of 2,910.95 hectares (24.53%), BPJ with an area of 2,047.44 hectares (17.25%), RHL an area of 471.12 hectares (3.97%), RPL area of 1,527.01 hectares (12.87%). Based on land typology the suitability of BHJ varieties of sugarcane suitable varieties PSMLG 1 AGRIBUN, VMC76-16, NX03, PS921, PSJT941, PSDK923; BPJ land typology of suitable varieties Cenning, VMC71-238, PA0218, NX01, Kentung, AASAgribun, PSJT 941, PSDK923, PSBK051, NX02; RHL land typology of suitable varieties PSKA 942, PA028, PSBK061, VMC76-16, AMS Agribun, ASA Agribun, PSJT941, NXI4T, MOJO01, Bululawang; RPL land typology of suitable varieties PS881, TLH02, PSKA 942, PSBK061, PS091, PSJK922, VMC86-550, PS862, PS851, PSCO902, Kidang Kencana, PS882, PS092, PS865, PS864, NXI4T, Bululawang. </p><p> </p><p><strong>Keywords: </strong>Soil drainage, Soil texture, Soil type, Soil typology, Sugarcane varieties.</p><p><em> </em></p>Basuki BasukiVega Kartika Sari
Copyright (c) 2024 Basuki Basuki, Vega Kartika Sari
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2024-02-012024-02-0113113214610.23960/jtep-l.v13i1.132-146Response of Growth and Seed Yield of Mung Bean (Vigna radiata L.) to Chicken Manure and Banana Hump Liquid Organic Fertilizer Application
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/6640
<p>Mung bean is highly important legume crop in Indonesia. Attempts to improve the yield and quality of mung bean seeds can be done through improving the planting media by adding organic fertilizer. The objective of this study was to determine the response of growth and seeds production of mung bean due to chicken manure and banana hump organic fertilizer. The research was performed in the greenhouse at the Balai Pengujian Standar Instrumen Tanaman Aneka Kacang (BSIPTAKA), Muneng Probolinggo. This study was structured in a factorial block design with three replications executed randomly. The first factor was doses of CM consisting of 0, 8.3, 16.7, and 25 ton/ha. The second factor was concentrations of banana hump liquid organic fertilizer (LOF) consisting of 0, 10, 20, and 30 ml/L. The result showed that doses of CM had a significant effect on plant height at 10 DAP, seed weight per plant, and seed yield. The interaction between CM doses and banana hump LOF was able to increase leaf chlorophyll index at 30 DAP. Combination of 16.7 ton/ha CM and 20 ml/L banana hump LOF produced the highest average chlorophyll index of 55.07 CCI.</p><p> </p><p><strong>Keywords: </strong>Chlorophyll index, Manure, Mung bean, Organic fertilizer, Seed.</p>Leli KurniasariFeri AnggriawanSri Ayu Dwi LestariNanti Bambang Eko SulistyoRahmat Ali SyahbanSri Rahayu
Copyright (c) 2024 Leli Kurniasari, Leli Kurniasari, Feri Anggriawan, Sri Ayu Dwi Lestari, Nanti Bambang Eko Sulistyo, Rahmat Ali Syahban, Sri Rahayu
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2024-02-012024-02-0113114715410.23960/jtep-l.v13i1.147-154Application of Agro-industrial Solid Waste as Biochar for Iron (II) Removal from Aqueous Solution
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7802
<p class="Abstract">In recent years, various industrial activities have introduced a high concentration of iron in the waterbody which causes serious problem to environment. This paper proposed the application of Exhausted Coffee Husk (ECH) as the biosorbent (BS) for removing iron (Fe) (II) in the aqueous solution. The ECH was carbonized into biochar before performing biosorption of the heavy metal ion. The effect of carbonization temperature, time and rate on the performance of the ECH biochar for removing Fe (II) were evaluated. The percentage of removal efficiency (RE) and the capacity of biosorption (mg/g) were considered as the determining parameters. The pyrolysis temperature was varied in a range of 200-600 °C with 50 °C of interval, while the time was in between 1h – 3h with a n interval of 0.5 h, and the temperature gradient of 5 – 25°C/min. The results showed that the temperature had a significant effect on the properties of the ECH biochar as BS for Fe (II). The temperature of 550 °C, at 1.5 h of time and 25 °C/min was chosen as the suggested carbonization temperature of biochar from ECH for biosorption of Fe (II). </p><p class="Abstract"> </p><p class="Abstract"><strong>Keywords:</strong> Agro-industrial solid waste, Biosorption, Carbonization, Exhausted coffee husk (ECH), Heavy metal. </p>Rusnam RusnamNika Rahma YantiAninda Tifani PuariNurmala Sari
Copyright (c) 2024 Aninda Puari
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2024-02-022024-02-0213115516410.23960/jtep-l.v13i1.155-164Performance Evaluation of Ball Mill Type Grinding Machine for Particle Size Reduction of Porang Glucomannan Crystals
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7583
<p><em>A wide gap in the price of glucomannan flour and porang tubers leads to develop a machine to process tubers into fine flour with good performance. The purpose of this research was to analyze and determine the performance of a ball mill machine on the flour yield as well as its quality. Research was conducted at PT Daud Teknik Maju Pratama from January – May 2023. Testings were carried out under two treatment factors, namely rotational speed (21.2 and 41.6 rpm) and processing time (0.5 h, 1.0 h, 1.5 h, 2 h). The test was carried out using 150 g sample for each treatment with three replications. The response variables included capacity, percentage of size reduction, material losses, engine power, and flour quality. The results showed that the optimum capacity of the ball mill machine was 12.5 kg/batch. The highest percentage of size reduction was 96.27% and the lowest material loss (3.73%) were obtained at 21.2 rpm for 0.5 h of miling process. Treatment with 41.6 rpm for 2 h produced the best flour quality with moisture content of 11.87% and fine flower yield of 63.97% passing through 100-mesh sieve. The power requirements of electric motors at 21.2 rpm and 41.6 rpm were 0.8063 kW and 0.9101 kW, respectively. The best milling capacity (1.560 g/min) was resulted at rotational speed of 62.27% CS. The ball mill machine showed superior results as compared to a disk mill which was not able to grind the glucomannan crystals up to 100-mesh size.</em></p><p><em><br /></em></p><p><strong>Keywords: </strong><em>Ball mill, </em><em>Glucomannan flour, </em><em>Performance test, </em><em>Porang, </em><em>Refining.</em></p><p><em><br /></em></p>Agus SutejoDionisius Dwi WicaksonoGatot Pramuhadi
Copyright (c) 2024 Gatot Pramuhadi, Agus Sutejo, Dionisius Dwi Wicaksono
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2024-02-062024-02-0613116517710.23960/jtep-l.v13i1.165-177Evaluation of The Chemical Properties, Chewiness Level, and Sensory of Yellow Pumpkin (Cucurbita moschata) Jelly Candy in Various Ratios of Caragenan and Gum Arabic
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7241
<p>This study aims to determine the effect of carrageenan and gum arabic formulations on chemical properties, level of elasticity, and sensory properties of pumpkin jelly candy and to obtain the right formulation of carrageenan and gum arabic to produce good quality jelly candy. The study was arranged in a Completely Randomized Block Design with a single factor and 4 replications. The treatment was the ratio of carrageenan and gum arabic consisted of 5%:0% (K1), 4%:1% (K2), 3%:2% (K3), 2%:3% (K4), 1%:4 % (K5). The data obtained were analyzed for homogeneity with the Barlett test, ANOVA, and the Tuckey test at the 5% level. Determination of the best treatment for pumpkin jelly candy was determined by the De Garmo method. The results showed that the best jelly candy was the K3 treatment (3% carrageenan; 2% gum arabic) which resulted in a texture score of 3.80 (chewy), color with a score of 3.97 (dark yellow), taste with a score of 4.11 (like ), water content of 7.66%, ash content of 0.99%, reducing sugar content of 14.31%, and sucrose content of 27.7%. Formulation of carrageenan and gum arabic significantly affected the chemical properties, level of elasticity, and sensory properties of pumpkin jelly candy.</p><p> </p><p><strong>Keywords: </strong><em>Gum Arabic, </em><em>Carrageenan, </em><em>Jelly candy, </em><em>Pumpkin.</em></p>Sussi AstutiOtik NawansihSri HidayatiOctavia Sopha Anggraini
Copyright (c) 2024 Sussi Astuti, Otik Nawansih, Sri Hidayati, Octavia Sopha Anggraini
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2024-02-062024-02-0613117818710.23960/jtep-l.v13i1.178-187Experimental Study on The Performance Characteristics of 4 Stroke CI Engine using Biodiesel Blend from Coconut Oil
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7650
<p>To address the challenges faced by the government in the realm of petroleum imports, a promising strategy was adopted in the utilization of biodegradable and renewable sources of biodiesel, such as coconut oil. This research employed two distinct methodologies: Transesterification for biodiesel synthesis and a comprehensive assessment of fuel properties. Subsequently, an experimental phase assessed biodiesel within an engine environment to analysis performance metrics. Results showed that B30 (30% coconut oil, 70% diesel oil) has density of 0.850 g/cm³, B50 (50% coconut oil) at 0.861 g/cm³, and B100 (Pure coconut oil) at 0.893 g/cm³. The values differed from regional standards. As per ASTM D6751, B30 has a viscosity of 2.31 cSt, B50 3.22 cSt, and B100 is 7.02 cSt. Engine performance revealed B50 with the highest torque at 11.787 Nm, while B0 (pure hydrocarbon diesel) has a thermal efficiency of 38%. B0’s lowest SFC (Specific Fuel Consumption) is 261.12 g/kWh at 2000 watts load and 1000 rpm. Biodiesel coconut oil provided comparable power and torque (0.3% difference from B0) but consumed more fuel (21.6 % higher usage than B0).</p><p> </p><p><strong>Keywords:</strong> Biodiesel, Coconut oil, Engine performance, Fuel properties, Transesterification.</p>suardi suardiFeston Sandi ParibangWira SetiawanAmalia Ika WulandariMuhammad Uswah PawaraAndi Mursid Nugraha ArifuddinAlamsyah Alamsyah
Copyright (c) 2024 suardi suardi, Feston Sandi Paribang, Feston Sandi Paribang, Wira Setiawan, Wira Setiawan, Amalia Ika Wulandari, Amalia Ika Wulandari, Andi Mursid Nugraha Arifuddin, Andi Mursid Nugraha Arifuddin, Alamsyah Alamsyah, Alamsyah Alamsyah
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2024-02-132024-02-1313118819610.23960/jtep-l.v13i1.188-196The Implementation of Micro/Nanobubbles (MNBs) Technology to Treat Basin Water as The Primary Water Source for Hydroponics in Greenhouse
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7773
<p>The greenhouse plays a pivotal role in creating an ideal environment for hydroponic cultivation. The greenhouse has utilized rainwater and basin water as a source of raw water for hydroponic farming. Presently, the water quality of Leuwi Padjadjaran basin fails to meet the standards required for hydroponics due to its turbidity, sediment content, discoloration, pH levels exceeding 7, and low dissolved oxygen (DO) concentration of 2.2 mg/l. The micro/nanobubbles (MNBs) technology stands as a viable method for water treatment owing to its capacity to bind impurities via radical OH. The application of MNBs for the treatment of basin water involves the use of a hydrodynamic cavitation MNBs generator with a dual-chamber rotating flow nozzle. The parameters evaluated in this research encompass DO concentration, MNBs stability, microbubble size, and the visual response to MNBs application. MNBs treatment was conducted with three different gases: air, oxygen, and ozone. Microbubbles were measured using the particle image velocimetry (PIV) method. The DO concentration reaches 21.6 mg/l when employing oxygen-based MNBs. On the third day post-generation, MNBs stability still maintains DO concentrations above the initial levels. Thus it can be used as hydroponic raw water. </p><p> </p><p><strong>Keywords:</strong> DO concentration, Greenhouse, Micro/nanobubbles, Water treatment.</p>Asep YusufChay AsdakMimin MuhaeminSophia Dwiratna N.PAnto Tri SugiartoHilman Syaeful Alam
Copyright (c) 2024 Asep Yusuf
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2024-02-132024-02-1313119720410.23960/jtep-l.v13i1.197-204Breaking Dormancy of Shallot (Allium ascolonicum L.) Bulb Using Hydrogen Peroxide
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7774
<p>Shallot bulbs have a dormancy period, so they must be stored for 3-4 months. This condition inhibits the acceleration of planting, which has a short time, so efforts are needed to accelerate the dormancy period by using hydrogen peroxide. This research was carried out from June to July 2023 at the Screen House, Teaching Farm, Faculty of Agriculture, Hasanuddin University. The study was arranged in a randomized block design with a two-factor factorial design. The first factor is the variety of Mentes, Rubaru, Violetta 2 Agrihorti, Kramat 1, and Ambassador 3 Agrihorti. The second factor is hydrogen peroxide concentration with three levels, namely 0%, 10% and 20%. The results showed that breaking the dormancy of shallot bulbs using hydrogen peroxide at a concentration of 20% effectively triggered the process of bulb growth in the various shallot varieties tested, marked by an increase in the percentage of rooted and sprouted bulbs. The Rubaru and Mentes varieties had an excellent response to 20% hydrogen peroxide immersion, indicated by a shorter rooting and sprouting time, compared to other varieties and concentrations of hydrogen peroxide. Therefore, hydrogen peroxide with a concentration of 20% can be used to break dormancy in shallot bulbs. However, further studies are needed on growth and production in the field and the quality and safety of shallot bulbs.</p><p> </p><p><strong>Keywords: </strong>Bulb, Dormancy, Hydrogen peroxide, Shallot.</p>Nurfaida NurfaidaElkawakib Syam'unFachirah UlfaKatriani MantjaMuhammad Faried
Copyright (c) 2024 Nurfaida Nurfaida, Elkawakib Syam'un, Fachirah Ulfa, Katriani Mantja, Muhammad Faried
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2024-02-152024-02-1513120521210.23960/jtep-l.v13i1.205-212Evaluation of Breaking and Deshelling Machine of Roasted Cocoa Beans
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/6645
<p>The manual cracking and separation of cocoa beans' husk result in low working productivity, a high percentage of broken beans, and the difficulty of separating cocoa nibs from the husk. This poses a challenge for both farmers and industrial players in cocoa bean management, leading to the development of a cocoa bean dehusking machine (desheller). This study was conducted to analyze the performance of the cocoa bean dehusking machine. The research involved motor speeds of 500, 700, and 900 rpm, combined with roasted cocoa bean grades AA, A, and B. The observed parameters included working capacity, yield, nib percentage, percentage of husk adhering to nibs, power transmission efficiency, and power requirements. The working capacity of the cocoa bean deshelling machine ranged from 17,413 to 41,481 kg/h, with yields between 73.83% and 80.83%. The nib percentage varied from 92.13% to 98.61%, while the percentage of husk adhering to nibs ranged from 1.08% to 6.92%. Power transmission efficiency was between 92.24% and 94.14%, and power requirements ranged from 601.33 to 645.33 watts. The best treatment in this study was found at a motor speed of 900 rpm with cocoa bean grade of AA. </p><p> </p><p><strong>Keywords:</strong> Desheller, Nibs, Roasted cocoa beans, Shell, Yield</p>Siswoyo SoekarnoIlham FirmansyahHendy FirmantoSoni Sisbudi Harsono
Copyright (c) 2024 Ilham Firmansyah, Siswoyo Soekarno
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2024-02-212024-02-2113121322210.23960/jtep-l.v13i1.213-222Classification of Banana Types Based on The Geometrical Attributes using Artificial Neural Network Method
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/6692
<p>Banana (<em>Musa paradisiaca</em>) is one of the important horticultural commodities. This study aims to measure the physical and geometrical parameters of three different bananas (Muli, Ambon, and Kepok) and to develop prediction equations using an Artificial Neural Network (ANN) model. In this study the backpropagation ANN model with supervised learning method was used. The ANN model had one output node, two hidden layers, and network architecture of 8 inputs, namely fruit weight and volume, projected area and roundness of the fruit, cross section, peel color, and geometric mean fruit cross section diameter. The data for building the model and testing the model were respectively 70% and 30% of the 150 data number in total. The results showed that the best ANN model structure for estimating Muli, Ambon and Kepok bananas was purelin-logsig-logsig with an RMSE value of 0.0077 and an R2 of 0.9999. This shows that the ANN model is highly robust to predict the banana types. Using the built model, the accuracy of the prediction results is 100%. </p><p> </p><p><strong>Keywords:</strong> Artificial Neural Network, Banana fruits, Geometry attribute. </p>Sri WaluyoRetama Agung PangestuWarji WarjiTri Wahyu Saputra
Copyright (c) 2024 Sri Waluyo
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2024-02-212024-02-2113122323110.23960/jtep-l.v13i1.223-231Combination of Osmotic Dehydration and Further Drying to Improve the Quality of Dried Carrots
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/6711
<p>The food industry needs carrots as a processed product for dry products using drying technology to maintain product quality. The aim of the research was to examine the effect of osmotic dehydration temperature with ternary solution on the quality of carrots. The treatments studied were osmotic media temperatures of 25°C and 50°C combined with oven drying and infrared until the water content reached ±10%. Parameters measured after osmotic dehydration were loss of water and increase in solids, quality parameters after further drying were water content and post-storage quality parameters were carotenoids and rehydration test. The dehydration treatment resulted in a reduction of water of 27.25%-44.24% and addition of solids of 15.37%- 18.31%. The initial water content of carrots before osmotic treatment was 90%, the water content after osmotic at 25°C was 65.72% and 50°C was 63.29%. Combination of osmotic with oven requires 22-24 hours of drying time while infrared requires 8- 10 hours of drying time. The best carotenoid value was osmotic dehydration at 25°C followed by an oven or infrared with a value of 32.95(mg/100g)–31.94(mg/100g). Whereas at 50°C the rehydration values were in the range 271.14%-301.42%</p><p> </p><p><strong>Keywords:</strong> Carrots, Infrared drying, Osmotic dehydration, Osmotic solution, Oven drying</p>Ranti - RantiLeopold Oscar NelwanEmmy - Darmawati
Copyright (c) 2024 Ranti - -, Leopold Oscar Nelwan, Emmy - Darmawati
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2024-02-222024-02-2213123224110.23960/jtep-l.v13i1.232-241Comparative Study of Antioxidant and Antibacterial Activities of Tropical Citrus Fruits (Juice and Peels)
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/6391
<p>Tropical citrus fruits contain important bioactive compounds with health-promoting properties such as antioxidant and antibacterial properties. This study provided comparative data on the antioxidant and antimicrobial activity of tropical citrus (local lemons, imported lemons, and limes) juice and peel. Antioxidant activity of citrus fruits was determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and expressed as IC50. Antimicrobial activity was evaluated against pathogens (E. coli, B. subtilis, S. aureus) using agar diffusion method. The results showed that very strong antioxidants were detected in domestic and imported lemon juice (33.45 ppm; 31.43 ppm) and peel (15.89 ppm; 44.50 ppm). However, lime juice and peel had stronger antioxidant activity (60.35 ppm and 59.54 ppm). The highest zone of inhibition was observed against S. aureus and the lowest was recorded against E. coli. The diameters of the zones of inhibition of local lemon, imported lemon, and lime juice against S. aureus were 26.40 mm, 27.95 mm, and 27.31 mm; E. coli was 15.64 mm, 16.84 mm, and 16.63 mm; and B. subtilis was 17.88 mm, 21.77 mm, and 21.24 mm, respectively. Tropical citrus juice showed higher activity against Grampositive than Gram-negative bacteria tested. Local lemon, imported lemon, and lime peels did not inhibit E. coli, B. subtilis, and S. aureus.</p><p> </p><p><strong>Keywords:</strong> Antibacterial, Antioxidant, Lemon, limes, Tropical citrus</p>Julfi Restu AmeliaFildzah Hashfi SafitriGiyatmi GiyatmiIntan Nurul Azni
Copyright (c) 2024 Julfi Restu Amelia, Fildzah Hashfi Safitri, Giyatmi Giyatmi, Intan Nurul Azni
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2024-02-222024-02-2213124224910.23960/jtep-l.v13i1.242-249Design and Examination of Yogurt Maker Machine with Sensor Temperature DS18B20
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7584
<h1 align="left"><span style="font-size: 10px;">Many commercial yogurt brands do not have a minimum total lactic acid bacteria count (107 CFU/g) due to long distribution with inappropriate storage condition. This leads local producers to produce yogurt. However, commercial yogurt maker machines commonly have a low capacity of 0.5 to 2 L. This study aims to design a yogurt maker machine with a capacity of 15 L with a temperature setting of 37 – 45 ℃. The design and flow system were conducted by arranging the electronic components consisting of 5V 4 channel relay, ESP32 module, DS18B20 temperature sensor, RTC, 12V fan (along with 12 VDC connecting components), 220V heater, 20×4 LCD and plugs (adapter) 220 VAC cable. The yogurt maker machine was evaluated for accuracy of temperature readings (DS18B20 sensor and thermometer), response to incubation time and plain yogurt making. The T-Test was used to compare the differences between the two types of sensors measuring instruments. The results showed that the accuracy of temperature readings using the DS18B20 sensor was better than a thermometer, with a distance scale of 0.35-0.75 ℃ (P-value ≤ 0.05). Temperature testing using milk can be carried out with a temperature range of 37-45 ℃ for 12 h. </span></h1><p><span style="font-size: 10px;"><strong>Keywords: </strong> DS18B20, Temperature, Yogurt maker machine, Sensors </span></p>Dewi YunitaAlfi Syahri NurazisJuanda JuandaIndera Sakti NasutionSatriana Satriana
Copyright (c) 2024 Dewi Yunita, Alfi Syahri Nurazis, Juanda Juanda, Indera Sakti Nasution, Satriana Satriana
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2024-02-262024-02-2613125025910.23960/jtep-l.v13i1.250-259Erosion Prediction and Soil and Water Conservation Scenario Using The SWAT Model
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7861
Increasing population and development has resulted in inappropriate land use within watersheds that increase soil erosion. One of the hydrologic models that can be used to predict erosion and soil and water conservation in a watershed is SWAT. This research was conducted to predict erosion and the guidance of soil and water conservation in the Yeh Empas Watershed. This research was carried out in several stages, including data collection, data analysis and map validation using the ROC (receiver operating characteristic) and AUC (area under curve) methods. Results revealed that Yeh Empas Watershed had a very light EHL (erosion hazard level) category was found in the downstream area with an annual erosion value of 0 – 14.68 t/ha. In the middle area, the EHL was categorized as light with an erosion value of 15.44 – 57.22 t.ha<sup>-1</sup>.y<sup>-1</sup>. The upstream area has moderate EHL with a value of 65.20 – 178.64 t.ha<sup>-1</sup>.y<sup>-1</sup>. The validation of the EHL map using the ROC method showed a result of 0.83. This value was classified as very good. It can be concluded that SWAT predictions can be used in estimating erosion and soil and water conservation scenario to reduce 85% erosion.<p> </p><p><strong>Keywords:</strong> Erosion prediction, Soil and water conservation scenario, SWAT models, Yeh Empas Watershed.</p>Ni Luh Trisna Candra DewiNi Nyoman SulastriI Gusti Ketut Arya ArthawanNgadisih Ngadisih
Copyright (c) 2024 Ni Luh Trisna Candra Dewi, Ni Nyoman Sulastri, Ngadisih Ngadisih, I Gusti Ketut Arya Arthawan
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2024-03-022024-03-0213126026810.23960/jtep-l.v13i1.260-268A Comparative Study of Respiratory Activity of Tropical Products under Two Storage Conditions
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/7805
<p>This study aimed to investigate respiration process of Indonesian tropical products and its parameter to support the use of CAS. Shallot, dragon fruit and sneak fruit that are high-value and export-potential products in Indonesia were investigated. For respiration measurement, the fruits were kept in tightly closed jars. The ratio of fruit volume and free volume of jar (headspace) was determined to calculate the rate of fruit respiration. To observe the storage condition effects, the jars were stored in two different temperatures: low temperature (7±2°C) and room temperature (27±2°C). In cold temperature storage, changes in O<sub>2</sub> and CO<sub>2 </sub>concentrations are slower than in room temperature storage. The rate of O<sub>2</sub> consumption and CO<sub>2</sub> production of products during storage decreased as the O<sub>2</sub> concentration decreased for all conditions. Based on the dramatic increase of RQ value at low O<sub>2</sub> concentrations, the low oxygen limits (LOLs) of shallot, sneak fruit and dragon fruit were estimated at around 7.5%, 4% and 2% O<sub>2</sub> respectively, at the room temperature. However, the LOL was not detected yet at a cold temperature for 200 h of measurement due to a slow decrease of O<sub>2</sub>. The results showed that different products had different respiration activities so that the storage procedures should be different. A determination of model-based LOL and validation would be needed in the next research to be precisely applied on CAS.</p><p> </p><p><strong>Keywords:</strong> Carbon dioxide, Dragon fruit, Shallot, Oxygen, Postharvest, Snake fruit.</p>Bayu NugrahaAn-Nidaa' Fatkhur RahmahIra AyuningsihDevi PriyantiFahrizal Yusuf Affandi
Copyright (c) 2024 Bayu Nugraha, Devi Priyanti, Ira Ayuningsih, An-Nidaa' Fatkhur Rahmah, Fahrizal Yusuf Affandi
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2024-03-132024-03-1313126927710.23960/jtep-l.v13i1.269-277The Influence of Soil Characteristic Changes on Erosion Rates Based on the Universal Soil Loss Equation (USLE) Method
https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/6221
<p>Soil erodibility is a major factor contributing to soil erosion as well as the intensity of erosion rates. This study aims to validate soil erodibility values based on soil type maps through field measurements of erosion hazard level (EHL) within the Antrokan Sub-watershed area, Jember. Input data included digital maps comprising rainfall data (from 2004 to 2019), soil types, land use allocation, and Digital Elevation Model (DEM). Erosion rate was calculated using the USLE model, which was executed in two steps: (1) processing and interpreting erosion variables (R, K, LS, CP), and (2) calculating and classifying soil EHL. Field measurements indicated that soil erodibility value (K) is higher as compared to the value derived from the soil type maps. This discrepancy impacts the predicted erosion rate, where using measured K values resulted in the severe EHL category, with erosion rate of 1131 t.ha<sup>–1</sup>.y<sup>–1</sup>, while using K values based on soil type maps produced erosion rate of 432.2 t.ha<sup>–1</sup>.y<sup>–1</sup>, categorized as moderate level. In this sense, validation of soil erodibility data is important for predicting erosion rate using USLE method. In conclusion, the soil conservation implementation to reduce K values is necessary in the Antrokan Sub-watershed area</p><p> </p><p><strong>Keywords:</strong> Erodibility, Erosion hazard level, Nomograph, Soil type, USLE.</p><p> </p>Idah AndriyaniYaumil Zahro Fadila
Copyright (c) 2024 Idah Andriyani
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2024-03-132024-03-1313127828710.23960/jtep-l.v13i1.278-287