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.
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.
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.
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