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All Journal JURNAL SAINS DAN TEKNOLOGI INDONESIA Journal of Tropical Soils Journal of Degraded and Mining Lands Management Majalah Ilmiah Pengkajian Industri
Rosjidi, Mochamad
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Education Engineering Environmental Science Industrial & Manufacturing Engineering Transportation

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PENGARUH ZEOLIT DALAM PUPUK TERHADAP PERTUMBUHAN DAN PRODUKSI PADI SAWAH DI KABUPATEN BADUNG PROVINSI BALI jufri, akhmad; Rosjidi, Mochamad
Jurnal Sains dan Teknologi Indonesia Vol. 14 No. 3 (2012)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (50.888 KB) | DOI: 10.29122/jsti.v14i3.921

Abstract

Many efforts are conducted to increase the fertilising efficiency, especially nitrogen in rice cultivation practices. This field experiment was conducted to evaluate the effect of zeolite on growth and production of lowland rice during rainy season in Badung, Bali. The experiment showed that fertilizer mixed with zeolite resulted in the same growth and productivity, although the fertilising doses was reduced. This means that zeolite incread fertilising efficiency in rice cultivation.
ANODA PB DAN GEL ELEKTROLIT UNTUK PROPULSI KAPAL SELAM Saputra, Hens; Rosjidi, Mochamad; Ghofar, Abdul; Tandirerung, Murbantan; Ismail, Mochammad; Islam Nurwantoro, Dorit Bayu
Majalah Ilmiah Pengkajian Industri Vol 11, No 2 (2017): Majalah Ilmiah Pengkajian Industri
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v11i2.946

Abstract

Battery is the most important component in the sub marine energy system. Up to now, majority of the sub marine are still using lead acid battery as the power source or propulsion, due to more safe in application as very high capacity of single cell (i.e. 10.000 ? 15.000 Ah). The drawbacks of aqueous based battery, which utilize liquid electrolyte, are because of having produced the hydrogen gas during charging process, in which it caused the electrolyte solution to become  dry and reduced the performance of battery. In addition that the hydrogen gas generated in the sub marine was dangerous. Therefore, the aim of  this research is how to reduce or eliminate of those drawbacks by modifying kind of the liquid electrolyte by using gel electrolyte. The gel electrolyte was synthesized to reduce the evaporation of electrolyte and to avoid the leaking when submarine maneuver.  The gel electrolyte  was made by using inorganic nanoporous MCM-41. It was synthesized by hydrothermal method, using Tetraethylortosilicate (TEOS) as silica sources, Cethyltrimethylammonium bromide (CTAB) as organic template and H2SO4 as catalyst. The MCM-41 lead acid battery gave a result of  OCV ca. 2,1 V.
INOVASI PUPUK CONTROLLED RELEASE FERTILIZER (CRF) UNTUK TANAMAN BAWANG MERAH Rosjidi, Mochamad; Saputra, Hens; Wahyudi, Imam; Setyorini, Dyah; Widowati, Ladiyani
Majalah Ilmiah Pengkajian Industri Vol. 12 No. 3 (2018): Majalah Ilmiah Pengkajian Industri
Publisher : Deputi TIRBR-BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (429.544 KB) | DOI: 10.29122/mipi.v12i3.2609

Abstract

Bawang merah merupakan salah satu komoditas pertanian yang menjadi perhatian pada saat ini untuk ditingkatkan produksinya dalam rangka mendukung program ketahanan pangan nasional. Upaya meningkatkan produksi pertanian membutuhkan dukungan pupuk yang sesuai dengan kaidah spesifikasi lokasi dan komoditas tanaman. Inovasi pupuk CRF yang dibuat dengan teknologi matrik dan biodegradable binder dapat meningkatkan panen sekitar 14% dibandingkan dengan penggunaan pupuk NPK biasa dan dapat menghemat pupuk hingga 50% serta cukup sekali pemupukan selama masa tanam. Pupuk CRF dapat mengendalikan pelepasan unsur nutrien dengan baik sesuai dengan hasil uji pelarutan dalam air. Zeolit alam yang digunakan merupakan campuran clinoptilolit dan mordenit. Bawang merah yang dihasilkan lebih baik dengan ukuran umbinya lebih besar dan warna merah cerah.
The potential of biochar and compost from sugarcane bagasse on growth, yield, nutrient uptake of shallot and properties of an Inceptisol Zu'amah, Hidayatuz; Handayani, Cicik Oktasari; Dewi, Triyani; Arianti, Forita Dyah; Beti, Jajuk Aneka; Jufri, Akhmad; Rosjidi, Mochamad; Sahara, Dewi; Maro'ah, Siti; Syamsiyah, Jauhari
Journal of Degraded and Mining Lands Management Vol. 12 No. 3 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.123.7559

Abstract

Excessive pesticide use and intensive shallot farming to satisfy high market demand can degrade soil quality and harm environmental sustainability. Sustainable agricultural practices, such as biochar and compost are alternatives to ensure long-term soil productivity and fertility. This study aimed to investigate the ability of biochar and compost made from bagasse waste to improve shallot growth, yield, nutrient absorption, and soil quality. The research used a factorial randomized block design in a greenhouse. The first factor was the application of biochar and compost (K1 = compost, K2 = biochar, K3 = biochar-compost (1:4/w:w) and K4 = biochar-compost (1:2/w:w), and the second factor was the dose of NPK fertilizer (0%, 50%, and 100% of the recommended dose). The planting medium used was an Inceptisol from shallot fields in Sukaharjo, Central Java. The variables measured included plant growth, yield components, soil chemical properties, and levels of N, P, and K in plants. The results showed that the combination of compost with 100% NPK fertilizer gave better results in plant growth, fresh and dry weight of plants and tubers, increased organic C, total N, and CEC of the soil, and increased the absorption of N, P, and K by plants.
Release Pattern of Nitrogen and Potassium from Controlled Release Fertilizer (CRF) in the Soil Suwardi, Suwardi; Suryaningtyas, Dyah Tjahyandari; Saputra, Hens; Rosjidi, Mochamad; Mustafa, Anwar; Ghofar, Abdul
JOURNAL OF TROPICAL SOILS Vol. 28 No. 3: September 2023
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2023.v28i3.99-106

Abstract

Nitrogen (N) and potassium (K) are macronutrients that plants need for better growth and yield. However, they are readily lost from the soil through volatilization, denitrification, and leaching, aside from being absorbed by plant roots. Thus, a Controlled Release Fertilizer (CRF) may be formulated and applied to maximize the beneficial effects of N and K fertilization. This study aimed to describe the release pattern of ammonium nitrogen (NH4 -N), nitrate nitrogen (NO3 -N), and K from CRF through the laboratory incubation method. Two types of CRF - CRF A (16-16-16) and CRF B (30-6-8), with a non-CRF (Mutiara NPK16-16-16) as Control – were used. Each fertilizer was tested at 600 and 1200 kg ha-1 doses. The results showed that the NH4 -N release was very high at 40 – 60% but declined to almost 0% after 14 weeks. The NO3 -N release rate was 17 – 40% during the first week, followed by a steady increase to nearly 100% by the 14th incubation week. Potassium release ranged from 20% to 30% in the first week, then rose to 30 – 70% at Week 14. Overall, CRF (30-6-8) at a dose of 1200 kg ha-1 showed the slowest rate of nitrogen release.
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Ghofar Akhmad Jufri Beti, Jajuk Aneka DEWI SAHARA Dyah Setyorini Dyah Tjahyandari Suryaningtyas Forita Dyah Arianti, Forita Dyah Handayani, Cicik Oktasari Hens Saputra Islam Nurwantoro, Dorit Bayu Ismail, Mochammad Jauhari Syamsiyah Maro'ah, Siti Mustafa, Anwar Suwardi Suwardi Tandirerung, Murbantan Triyani Dewi Widowati, Ladiyani Zu'amah, Hidayatuz