Jurnal Al Ulum LPPM Universitas Al Washliyah Medan

COMPARATIVE STUDY ON YIELD OF EDIBLE LOCAL MUSHROOM USING DIFFERENT CARRIERS OF SPAWN

2024-10-20T09:59:33+07:00

Spawn quality is an important factor that affects the final yield in mushroom production. As most mushroom spawns are in the form of cereals, wheat grain, sorghum and corn seeds that are used as a carrier for growth of mushroom mycelium. Inoculation of the grain spawn into media bags is an essential process. This inoculation process requires skill and focus to avoid contamination and wastage of time and material. Pellet spawn can be made by using sawdust, rice straw or wood (dowel) as carrier. This makes it simple to hold and inoculate due to its firm form instead of using grain spawn. Strains of selected edible mushrooms such as Pleurotus pulmonaris, Pleurotus florida and Schizophyllum commune are cultivated with wood pellet for mycelia colonisation. Mycelium colonisation on pellet (pellet spawn) is used for inoculation into substrate bag. The cost of pellet spawn production is 30% cheaper in mass production instead of grain spawn. The inoculation of pellet spawn into mushroom bag substrate are relatively easier and faster compared to use of grain spawn. Moreover, innoculation time on each bag could be reduced up to 40% compared with the conventional method. The production and use of pellet spawn among mushroom growers are still rare. Due to this, the use of pellet spawn is seen as an easy innoculation alternative, efficient and practical to mushroom growers.

PENATAAN PARKIR BERBASIS GREEN TRANSPORTATION DI POLITEKNIK NEGERI MEDAN

2024-10-29T05:28:34+07:00

Arranging the parking area by planning the need for vertical parking spaces based on green transportation can be done to increase the UI Greenmentric score at Politeknik Negeri Medan, making the campus environmentally friendly. Therefore, the need for parking spaces is calculated. The planning of vertical parking spaces is based on parking population survey data conducted directly in the field as well as secondary data from previous research. From the calculations, the current need for motorcycle parking space at Politeknik Negeri Medan is 699 SRP, which will increase to 1,003.641 SRP in the next 10 years. Since only 800 SRP are available at the planned location, a multi-level motorcycle parking facility is being planned. Thus the existing parking area can be reduced by 4-7% with a score of 100 or 50% of the maximum value of indicator TR5. This figure increases from the calculation in the existing condition, which is 7-11% with a score of 50, representing 25% of the maximum value of the TR5 indicator.

Keywords: Pedestrian, Parking Space, Green Transportation

PENERAPAN RUANG TERBUKA HIJAU DALAM KONSEP TAMAN KOTA DI JAKARTA TIMUR

2024-12-06T11:38:33+07:00

Lahan perkotaan biasanya selalu dimanfaatkan untuk kepentingan ekonomi, sehingga lahan – lahan kosong banyak dibangun pertokoan, perkantoran, dan apartemen, demikian pula halnya dengan kawasan di Kota Jakarta. Building Coverage Kota Jakarta saat ini adalah 60 persen terhadap luas lahan yang ada. Berarti luas lahan terbangun berbanding lahan terbuka adalah 60 : 40, 60 persen adalah luasan bangunan dan sisanya lahan terbuka seluas 40 %. Penelitian ini merencanakan sebuah lahan terbuka untuk dijadikan lokasi taman kota, tepatnya di Jalan Jenderal Basuki Rahmat, Cipinang Besar, Kecamatan Jatinegara, Jakarta Timur. Peruntukan lahan pada lokasi tersebut difungsikan untuk perdagangan dan jasa skala wilayah kota. Lahan terbuka dimaksudkan sebagai taman kota yang berfungsi sebagai tempat hiburan, istirahat, berkumpul. Dari fungsi – fungsi tersebut dapat direncanakan spot olah raga, kuliner, dan hobby bermanfaat. Tujuan penelitian ini adalah merancang sebuah lahan /tapak untuk dijadikan taman yang didalamnya terdapat beberapa fungsi untuk sarana hiburan, sarana berkumpul, sarana olah raga dan beberapa sarana penyaluran hobby. Perancangan tapak atau lahan harus mengikui kaidah – kaidah perancangan dengan elemen arsitektur yaitu proporsional, skala, Point of Interest, Unity, Komposisi (Sequence), keseimbangan (balance), Irama (Accentuation & Rhythm). Hasil penelitian adalah sebuah perancangan tapak seluas 6,3 hektar dilahan kota Jakarta Timur berdasarkan elemen perancangan arsitektur.

PENILAIAN PERTUMBUHAN HASIL BEBERAPA PERSILANGAN BENIH JAGUNG (ZEA MAYS)

2024-12-11T12:58:44+07:00

Seed quality is the beginning of the success of a production process, corn germination test is needed so that this cross produces quality seeds. This research aims to determine the seed germination test carried. The research used a non-factorial randomized block design with 4 levels T1 (1 male :2 woman), T2 (Ratio 1 male :3 woman), T3 (Ratio 1male :4 woman), and T4 (Ratio 1male :5 woman). The germination percentage is calculated using the formula: germination percentage (%) = number of germinated seeds & number of seedsx100. The observations used are germination percentage, germination speed, germination index (G1), average seed germination (MGT) and normal and abnormal seed numbers. The results of the research showed that the percentage of corn seed germination in all replications showed the best results with seeds that grew in the range of 98%-100%. T1 (1 male: 2 females) showed the best speed of corn seed germination with 15.31 and the best average time of seed germination was shown in replicate T3 (1 male: 4 females) with an average of 3.74. The results showed that p < 0.05 was not significantly different in corn germination.

MENGELOLA RISIKO PERUBAHAN IKLIM PADA AIR IRIGASI DI DAERAH KERING

2024-12-01T15:38:13+07:00

Changes in temperature, precipitation, atmospheric carbon dioxide, or abnormal solar radiation are examples of climate changes that can affect irrigation water needs. Reduced river runoff and aquifer recharge in the Mediterranean basin are also likely to exacerbate water scarcity in existing arid environments This study aims to propose a systematic approach to identifying, analyzing, and responding to climate change risks to irrigation water in dry areas using the Risk Management process.

The scope of this study is to use Monte Carlo simulation to manage climate change risks to irrigation water in dry areas. The first research method used is to make a list of identified climate change risks. Conduct qualitative and quantitative analysis of the identified risks and make responses to the identified risks. The results of the quantitative risk analysis indicate that crop production losses due to climate change are estimated at 69%, 57%, and 45% at 90%, 50%, and 10% confidence levels, respectively. The last phase of the risk management process is risk response. The proposed responses to climate change risks include strategies to avoid, transfer, mitigate, and/or accept these risks. This study has made three contributions. First, it adopts a well-known risk management methodology in climate change studies. Second, it measures the combined impact of climate change risks on irrigation water in dry areas. Third, it recommends a series of response strategies to help policymakers mitigate the adverse impacts of climate change on irrigation water.

PERANCANGAN APLIKASI LIGHT DEPENDENT RESISTOR (LDR) PADA PEMBANGKIT LISTRIK TENAGA SURYA UNTUK MENINGKATKAN ENERGI LISTRIK YANG DIHASILKAN SECARA OTOMATIS

2024-12-31T12:45:59+07:00

The purpose of this study is to design an application that utilizes Light Dependent Resistor (LDR) to increase the efficiency of solar power generation systems. The scope of this study includes the use of Light Dependent Resistor (LDR) in optimizing solar power generation systems, energy efficiency analysis, and the effect of changes in light intensity on solar panel performance. The methodology used is the method of data collection (case study) and data analysis obtained from experiments and designing applications using LDR to control the movement mechanism of solar panels to obtain light energy in real-time. The results show that the integration of this sensor can increase energy production by up to 23% compared to conventional fixed systems. This system not only increases the effectiveness of solar power generation but also contributes to reducing maintenance costs and supports sustainable energy practices. The conclusion of the study shows that automatic angle adjustment on solar panels increases energy capacity by 13-19% compared to panels with fixed angles. The average power generated reaches 11.57 watts, higher than 10.07 watts from fixed panels. The use of LDR also increases the intensity of light received.

LINIERISASI ITERATIF PADA METODE BEDA HINGGA UNTUK MEYELESAIKAN MASALAH KONDISI BATAS DIRICHLET PERSAMAN DIFERENSIAL BIASA NON LINIER

2024-12-31T14:36:25+07:00

Dirichlet boundary condition problems in nonlinear ordinary differential equations generally have to be worked out numerically by applying the concept of finite differences, producing a system of non-linear equations. The Newton and Broyden methods are very popular for solving a system of non-linear equations, but both require very long calculation times if the variables are on a large scale. The concept of iterative linearization of a system of non-linear equations produced by the finite difference method in a nonlinear differential equation, it will provide new insight into the problem of Dirichlet boundary conditions.

STATUS KESUBURAN TANAH PADA AREAL REPLANTING TANAMAN KARET (Hevea brasiliensis) DI KONVERSI MENJADI KELAPA SAWIT (Elaeis guineensis Jacq)

2024-01-24T14:55:11+07:00

Rubber plants (Hevea brasiliensis) will experience a decrease in production as plants age and the nutrient content in the soil decreases. This study aims to find out the chemical properties of soil on plantations of rubber crops that are converted into palm and coconut crops. The research was conducted from October 2023 to January 2024 at the palm coconut plantation of PTPN III Aek Nabara North Garden in Labuhanbatu district and analyzed in the Land Laboratory of the Faculty of Agriculture of the University of Northern Sumatra. The methods used are observation methods, field sampling, and analysis in the laboratory to obtain quantitative data. Observation parameters include soil pH, C-organic, Total Nitrogen, Available P, Cation Interchange Capacity, and Base Fulness. The results of the survey showed that the level of soil fertility at the site of the research was included in the low category. The main limiting factor that causes the low fertility of the soil is the low content of organic material in the soil. In order to improve the fertility status of the ground at the research site for further planting, it is necessary to make efforts such as irrigation and fertilization, as well as the addition of organic materials, to make the availability of nutrients for plants more affordable.

TIME HISTORY ANALYSIS PADA STRUKTUR BANGUNAN YANG MENGGUNAKAN BASE ISOLATOR

2025-01-31T20:34:49+07:00

Base isolators are designed to protect structures from earthquake impacts by decoupling horizontal ground motion from the building. This technology is widely applied to bridges, buildings, and critical facilities due to its efficiency in reducing damage risks. This study aims to evaluate the effectiveness of base isolators in minimizing dynamic structural responses to earthquakes. Numerical simulations were conducted to compare the performance of structures with and without base isolators, focusing on maximum acceleration, velocity, and displacement. The results indicate that base isolators reduce maximum acceleration by 75.1%, velocity by 74.83%, and displacement by 34.79%. Therefore, base isolators have proven to significantly enhance structural resilience against earthquakes. These findings provide practical insights for designing safer and more earthquake-resistant buildings

PERBANDINGAN PERTUMBUHAN JAHE MERAH (Zingiber officinale var. rubrum) MELALUI METODE PENANAMAN SECARA MANUAL DAN MENGGUNAKAN MESIN TANAM TRANSPLANTER

2025-01-22T13:37:16+07:00

This study aims to see the effect of manual planting methods and using a transplanter machine on the growth of red ginger plants, and to see whether there is a difference in the growth and productivity of ginger plants using these two methods. This study was conducted at the Engineering Research Center, Malaysian Agricultural Research and Development Institute (MARDI), Malaysia. A total of 16,000 ginger seeds were prepared for manual planting. Then, 16,000 ginger seeds were also prepared for planting using a transplanting machine. Several parameters observed in this study, such as plant height, rhizome width, rhizome weight and number of shoots. The results showed that the average ginger growth using machine is greater than manual on all parameters. The use of a transplanting machine in ginger planting was able to produce higher plant height, rhizome width, rhizome weight and number of shoots compared to manual planting. However, only the rhizome width parameter showed a significant difference between the two treatments (p<0.05). The use of machines in the ginger planting process is not only more efficient but also able to create better conditions for rhizome growth.

ANALISA KAPASITAS KEBUTUHAN SISTEM ENERGI LISTRIK PLN DAN PANEL SURYA UNTUK PROSES PEMBUATAN GARAM

2025-01-23T09:35:32+07:00

This research discusses the utilisation of solar power plants (PLTS) in supporting salt production through a hybrid system with PLN electricity. The main objective is to design and optimise an efficient and sustainable renewable energy system, especially in remote areas with limited electricity supply and to determine the needs of PLN electricity and solar panel energy systems during the salt cooking process. This research method collects data by measuring various important components, such as the voltage from the inverter to the stove supplied from PLN electricity and solar panels to the battery. The test results show that salt production requires 700 watts of power from PLN for 1.5 hours with an average voltage of 195-196 volts and a current of 3.3-4 amperes. The voltage of the solar panel to the battery stabilised at 12.58 volts during sunny weather and decreased to 12.21 volts during cloudy weather. This research shows that the solar power plant for salt production has worked effectively. By building a hybrid system of PLN and solar panels to ensure the sustainability of salt production, especially in overcoming the instability of the power generated by solar panels due to weather changes

RESPON PENGGUNAAN PUPUK KASGOTCHAR DAN NPK MUTIARA TERHADAP PRODUKSI TANAMAN SAWI PUTIH (Brassica pekinensis L) VARIETAS TAHONO CR

2025-02-15T09:57:35+07:00

The demand for white mustard in the market will continue to increase every year in line with economic growth, population growth, and growth in people's income, both for food, medicine, or other purposes. One of the efforts made to maintain and improve soil fertility is by providing organic materials such as manure to the soil. The purpose of this study was to determine the response to the use of kasgotchar fertilizer and pearl NPK fertilizer on the production of white mustard (Brassica pekinensis L) varieties of Tahono CR. This study used a Factorial Randomized Block Design with 2 factors: Factor l, namely the provision of Biochar kasgot fertilizer (K) with 3 levels, namely: K0 = Control (0 kg / plot), K1 = 10 tons / ha (1 kg / plot), K2 = 20 tons / ha (2 kg / plot). Factor 2, namely the provision of NPK fertilizer 16: 16: 16 (P) with 4 levels, namely: N0 = Control (0 kg / plot), N1 = 100 kg / ha (0.01 kg / plot), N2 = 200 kg / ha (0.02 kg / plot), N3 = 300 kg / ha (0.03 kg / plot). The parameters observed in this study include fresh weight per crop and production per hectare (kg). The results of the study showed that the use of kasgotchar and NPK fertilizers did not differ significantly on fresh weight per crop, production per hectare. The best treatment was the K2N3 treatment (kasgotchar with a dose of 2 tons / ha, and NPK with a dose of 300 kg / ha. Kasgotchar fertilizer can improve soil chemical properties.