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Penentuan Kurva Retensi Air Tanah Laboratorium dengan Sensor Resistensi dan Kapasitansi Bowo, Cahyoadi; Hasan, Mohammad; Marhaenanto, Bambang
JOURNAL OF TROPICAL SOILS Vol 14, No 1: January 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i1.57-64

A soil water retention curve determination method is developed based on the use of gipsblock and capacitance sensors. The objective of the research was to provide a simple and quick method in characterization of soil water retention in the laboratory based on resistance and capacitance sensors. Undisturbed soil sample collected using stainless steel ring sampler 8cm in diameter and 6cm height. Digital gipsblock and capacitance sensors connected to personal computer detected periodically water tension and volumetric water content of the sample. To test the reliability of collected data, measurement using pressure plate apparatus was also conducted. Result of the experiment for soil samples textural classes loam to clay loam leaded well compromise with result from pressure plate. However, significant deviation of soil water content has been detected as theÂ soil water suction exceeded 15,000hPa. Deviation of measured water content increased with the reducing water content up to 0.300cm3.cm-3. Implication of this result showed a further finer standardization assesing water tension above 10.000hPa is needed.

RANCANG BANGUN ALAT PENYIRAM OTOMATIS PADA BUDIDAYA TANAMAN SECARA VERTIKULTUR MENGGUNAKAN ARDUINO Diah Meyshita Utari; Bambang Marhaenanto; Sri Wahyuningsih
Berkala Ilmiah Pertanian Vol 2 No 3 (2019): AGUSTUS
Publisher : Jember University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bip.v2i3.16273

ABSTRACT The demand was increase each year, but supplies with productions are not belance. This is due by narrowing of agricultural land, verticulture is verticulture is a planting system solution that save agricultural land. Vertical cultivation needs to be treated, such as watering to keep the optimal soil moisture. The wrong watering will make the green mustard productions not maximal and even die. Therefore, this research purpose to design an automatic watering system can help s the treat and control proper watering system . In this research, the automatic control system components have been tried before applied and soil moisture measurement to determine the setpoint value. The results of the trials indicated that components proper to applied on watering verticulture system and soil moisture value 34.11% for the soil water field capacity, 27.86% for temporary wilting point of green mustard. The result of the study indicated that automatic watering system on the set point value, if the soil moisture is less than the lower setpoint value, the pump will be on and if it is more than the upper setpoint value, the pump will be off. This result was successful, because the pump can be on and off match with the settled setpoint value. Key words : Verticulture, automatics watering system, control system arduino, soil moisture ABSTRAK Permintaan meningkat setiap tahun, tetapi persediaan dengan produksi tidak seimbang. Hal ini disebabkan oleh penyempitan lahan pertanian, verticulture adalah solusi sistem tanam yang menyelamatkan lahan pertanian. Budidaya vertikal perlu nutrisi yang cukup, seperti penyiraman untuk menjaga kelembaban tanah yang optimal. Penyiraman yang salah akan membuat produksi sawi hijau tidak maksimal dan bahkan mati. Oleh karena itu, tujuan penelitian ini untuk merancang sistem penyiraman otomatis dapat membantu perlakuan dan kontrol sistem penyiraman yang tepat. Dalam penelitian ini, komponen sistem kontrol otomatis telah dicoba sebelum diterapkan dan pengukuran kelembaban tanah untuk menentukan nilai titik pengaturan. Hasil uji coba menunjukkan bahwa komponen yang tepat untuk diterapkan pada sistem penyiraman tanaman dan nilai kelembaban tanah 34,11% untuk kapasitas lapangan air tanah, 27,86% untuk sementara titik layangan mustard hijau. Hasil penelitian menunjukkan bahwa sistem penyiraman otomatis pada nilai titik setel, jika kelembaban tanah kurang dari nilai SetPoint bawah, pompa akan berada di dan jika itu lebih dari nilai SetPoint atas, pompa akan dimatikan. Hasil ini berhasil, karena pompa dapat on dan off cocok dengan nilai titik pengaturan menetap. Kata kunci: Vertikultur, sistem penyiraman otomatis, sistem kontrol Arduino, kelembaban tanah

PENENTUAN LAMA SANGRAI KOPI BERDASARKAN VARIASI DERAJAT SANGRAI MENGGUNAKAN MODEL WARNA RGB PADA PENGOLAHAN CITRA DIGITAL (DIGITAL IMAGE PROCESSING) Bambang Marhaenanto; Deddy Wirawan Soedibyo; Miftahul Farid
JURNAL AGROTEKNOLOGI Vol 9 No 02 (2015)
Publisher : Faculty of Agricultural Technology, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (917.504 KB)

Roasting is one of the important stages in coffee processing to forming its aroma and taste. The purpose of this study was to determine the level of relationships between RGB value from sample image with the RGB value from roasting degrees standard image and predict the duration of roasting based on the similarity of RGB value between both samples and roasting degrees standard. The samples of roasted coffee were taken in various temperature (195oC – 250oC). Images of those samples were taken using CCD camera and IC Capture software. The images then were evaluated using Sharp Develop program to obtain RGB values. There were very strong relationships between RGB value Arabica samples with roasting degrees standard of roast temperature 205°C, 225°C, 250°C, either with robusta samples, at temperature 195°C, 200°C, 205°C , 225°C, 250°C and 275°C. Based on analysis, the G value produced the best relationship, so the formula to predict the duration of roasting build with this value. Using linier regretion all of the duration to achieved various roasting degrees of Arabica and robusta can be predicted at every roast temperature from the lowest degrees (cinnamon roast) to highest degrees (Italian roast) at every roast temperature. The Result were: Robusta 200°C (101.7 minutes, 158.2 minutes); Robusta 225°C (56.9 minutes, 85.2 minutes); Robusta 250°C (30.2 minutes, 41.3 minutes); Arabica 205°C (31.6 minutes, 44.7 minutes); Arabica 225°C (20.7 minutes, 28.9 minutes); and Arabica 250°C (21 minutes, 29.6 minutes).Keywords: carrageenan, leather, organoleptik, sorbitol, subgrade pineapple

RANCANGAN SISTEM PENGENDALI SUHU DAN KELEMBABAN BERBASIS MIKROKONTROLER PADA RUANG PERTUMBUHAN FODDER (FODDER GROWTH CHAMBER) Bambang Marhaenanto
JURNAL AGROTEKNOLOGI Vol 15 No 02 (2021)
Publisher : Faculty of Agricultural Technology, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/j-agt.v15i02.30959

The availability of green feedstock for sheep is difficult to find during a dry season. To resolve this problem, seed seedlings such as sorghum and corn are known as green fodder is needed. In order to maintain seedling productivity, fodder planting is carried out in a chamber to control temperature, humidity, and light regulators. The objective of this study was to design a fodder growth chamber for providing sheep feed. The chamber is 4×3×3 m (l×w×h) which is equipped with a tray rack, evaporative cooler, humidifier, exhaust fan, and LED strip. A controller unit was employed to maintain temperature and humidity. The controller is based on a microcontroller that is programmed using BASCOM AVR. The controller unit was tested to maintain the temperature within the range of 35-45oC and humidity within 55-75%. It resulted a graph that indicated that temperature has fluctuated between desired range as well as humidity. Corn seeds were grown on the tray (700 g per tray) for 10 days and produced 1500 g per tray. Keywords: animal feed, automatic control, fodder microcontroller

Rancang Bangun Destilator Elektrik dan Evaluasi Kinerja Destilasi Bioetanol dari Rumput Laut (Eucheuma Cottonii) Fathan Edy Purwanto; Agus Dharmawan; Siswoyo Soekarno; Soni Sisbudi Harsono; Bambang Marhaenanto
Jurnal Teknologi Pertanian Andalas Vol 26, No 2 (2022)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jtpa.26.2.130-135.2022

Bioethanol from seaweed is the ethanol produced from the anaerobic fermentation of seaweed with the assistance of microorganisms. A distillation process is required to separate ethanol from a mixture - the fermented bioproducts. The aims of this research are to develop a distiller equipped with a control system of temperature, evaluate the output flow rate and the content of bioethanol from seaweed (Euchemia cottonii). The desired electric distiller was developed in five main components, i.e., control system, heater, distilling tube, condenser, and a centrifugal pump. The seaweed is fermented with the starter Saccharomyces cerevisiae for 48 hours under room temperature. The fermented product is then distilled using a developed electric distiller for 6 hours; the control system worked to maintain the temperature in process, 800C. The distiller worked with an average output flow rate of 0.024 L/h. The bioethanol started to release from the system at a minute of 253 and temperature 710C. The output bioethanol had a yield of 3.3% dan 39% of alcohol content.

RANCANG BANGUN ALAT UKUR EVAPOTRANSPIRASI BERBASIS INTERNET OF THINGS (IOT) Suhardi Suhardi; Bambang Marhaenanto
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 10 No 1 (2022): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Transpirasi merupakan suatu proses pelepasan air yang disertai dengan pelepasan nutrisi mineral dari akar tanaman ke pucuk daun melalui proses fotosintesis. Transpirasi yang tinggi akan menyebabkan kekurangan air terutama di sekitar perakaran. Dengan demikian, transpirasi ini dapat dijadikan pertimbangan untuk menyatakan status ketersediaan air pada tanaman. Tujuan penelitian ini adalah rancang bangun alat lysimeter berbasis IoT untuk mengukur evapotranspirasi aktual di lapangan dengan akurasi sangat baik. Hasil penelitian menunjukkan bahwa lysimeter berbasis IoT berfungsi dengan baik. Begitu pula dengan hasil evaluasi kinerja lysimeter menggunakan Back Propagation Artificial Neural Networks (BPANN) menunjukkan kinerja sangat baik dengan nilai koefisien korelasi R= 0,998343 dengan MSE= 0,00000019 pada tahap training, R= 0,9460054 dengan MSE= 0,0000119 pada tahap validation, dan R= 0,99996 dengan MSE= 0,0000693 tahap testing.

Penentuan Kurva Retensi Air Tanah Laboratorium dengan Sensor Resistensi dan Kapasitansi Bowo, Cahyoadi; Hasan, Mohammad; Marhaenanto, Bambang
JOURNAL OF TROPICAL SOILS Vol. 14 No. 1: January 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i1.57-64

A soil water retention curve determination method is developed based on the use of gipsblock and capacitance sensors. The objective of the research was to provide a simple and quick method in characterization of soil water retention in the laboratory based on resistance and capacitance sensors. Undisturbed soil sample collected using stainless steel ring sampler 8cm in diameter and 6cm height. Digital gipsblock and capacitance sensors connected to personal computer detected periodically water tension and volumetric water content of the sample. To test the reliability of collected data, measurement using pressure plate apparatus was also conducted. Result of the experiment for soil samples textural classes loam to clay loam leaded well compromise with result from pressure plate. However, significant deviation of soil water content has been detected as theÂ soil water suction exceeded 15,000hPa. Deviation of measured water content increased with the reducing water content up to 0.300cm3.cm-3. Implication of this result showed a further finer standardization assesing water tension above 10.000hPa is needed.

PENGEMBANGAN LAHAN UNTUK KOMODITAS KOPI ROBUSTA (Coffea carnephora) DI KABUPATEN JEMBER INDONESIA BERDASARKAN POTENSI SUMBER DAYA ALAM Marhaenanto, Bambang; Andriyani, Idah; kuswardhani, Nita; Tiarawardani, Dwi Anggi Ade
Jurnal Penelitian Sains dan Teknologi Indonesia Vol 4 No 1 (2025): Jurnal Penelitian Sains dan Teknologi Indonesia (JPSTI)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LP2M) Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

The Jember Regency has a land area of 3,293.34 km2 (BPS, 2020). Geographically, Jember Regency is located in a strategic area with natural resources that are potential for coffee plantations (Salma et al., 2015). One of them is the robusta coffee variety, which has a bitter taste and high caffeine content. The area of coffee plantations and coffee production decreased from 2019 to 2020 (BPS, 2020). This decline may continue even now. Meanwhile, domestic and international coffee consumption increased from 2020 to 2021 (USDA, 2021). This study uses secondary data for each parameter. Each parameter is classified into its respective land suitability class. After classification, each class is assigned a weight value. The evaluation of land suitability is determined by overlaying raster calculations in ArcGIS 10.3 software to create a map of coffee robusta land suitability classes. The results of data processing indicate that the natural resources for coffee robusta in Jember Regency, based on soil texture, c-organic matter, KTK, nitrogen, phosphorus, potassium, slope gradient, and TBE are predominantly class S1 (highly suitable); the parameters of air temperature, rainfall, and soil pH are predominantly class S2 (moderately suitable); the parameters of dry months and soil depth are predominantly class S3 (marginally suitable). Overall, land suitability is predominantly class S2 (moderately suitable).

Performance Analysis of a Multi Seed Smart Dryer Machine for Drying Peanuts (Arachis hypogaea L.) Soekarno, Siswoyo; Firdiyanti, Fina; Harsono, Soni Sisbudi; Marhaenanto, Bambang
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 13 No. 4 (2024): December 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i4.1262-1271

Peanuts are the second largest legume crop in Indonesia, both cultivated on farms and wild. In 2019-2023, Indonesia experienced a decline in peanut production due to the declining in harvesting area. In addition, this is also due to the poor quality of seeds in the cultivation process. This study aims to observe the performance of the Multi Seed Smart Dryer (MSSD) machine for peanut seeding. This research was conducted by observing changes in moisture content, drying rate, drying temperature, and peanut germination test results using the Multi Seed Smart Dryer machine. The results showed that the left side of all shelves experienced an increase in temperature because it was close to the heat source and the level of temperature uniformity was still said to be uniform because it did not exceed the uniformity limit. The peak drying rate occurred at the 12th hour and decreased further. Based on the results of the germination test, the dried beans have a germination rate of 83%. This is in accordance with the passing standard of seed quality according to the Ministry of Agriculture of the Republic of Indonesia and International Seed Testing Association. Keywords: Drying, Multi Seed Smart Dryer, Peanut, Temperature.

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