Judul: Pengaruh pemberian bahan pembenah tanah dan pupuk cair terhadap pembibitan tanaman kelapa sawit pada ultisol jasinga.
Abstrak: Bahan pembenah tanah Baode akar merupakan mikrob yang berguna untuk meningkatkan pertumbuhan tanaman. Mikrob ini termasuk ke dalam mikrob yang dapat memproduksi sejenis PGPR (Plant Growth Promoting Rhizobacteria). Mikrob utama yang terkandung dalam bahan pembenah tanah Baode adalah Bacillus laterosporus. Bakteri B. laterosporus dalam tanah dapat berfungsi untuk mengurangi pengaruh buruk dari mikrob–mikrob patogen. Bahan pembenah tanah Baode daun merupakan senyawa organik yang berisi hormon pertumbuhan yang berfungsi untuk meningkatkan pertumbuhan dengan mengatur enzim, meningkatkan fotosintesis, dan mengurangi dampak negatif dari penyakit pada tanaman. Pupuk cair GD merupakan senyawa organik yang mengandung 10% bahan humat. Bahan humat merupakan suatu senyawa yang dapat diekstrak dari berbagai jenis tanah di mana senyawa ini mengandung unsur C, N, dan S yang lebih tinggi dari bahan asalnya.
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Judul: Pengaruh Pemberian Bahan Pembenah Tanah dan Pupuk Cair terhadap Pembibitan Tanaman Kelapa Sawit pada Ultisol Jasinga
Abstrak: The soil ameliorant of Baode root is an useful microbe for improving the growth of plant. These microbes are classified into types of microbes that can produce PGPR (Plant Growth Promoting Rhizobacteria) substances. The main microbe in Baode soil ameliorant is Bacillus laterosporus. In the soil, this bacteria is very useful to reduce the negative effects of pathogens. The Baode leaf is an organic compounds that contains the growth hormone, which are useful for increasing plant growth by regulating enzymes, improving photosynthesis, and reducing the negative impact of disease on plants. The liquid fertilizer of GD is an of organic compound which has 10% humic material. Humic material is a substance that can be extracted from various types of soil which contains C, N, and S elements higher than its origin material. This research aims to look to the influence of Baode soil ameliorant and GD liquid fertilizer to the oil palm plant nurseries. In this research there were seven treatment groups namely KT, BTSM, BTR, BTSMS, BTRS, GR, GRS. The doses of Baode soil root material was 2 g/l to immerse the seeds and pour directly into the soil and 1 g/l of Baode leaf to spray the leaf. The doses of GD liquid fertilizer was 2 ml/l to immerse the seeds and 1 ml/l to spray the leaf. The basic fertilizers were Urea 0.81 g/polybag, SP18 1.8 g/polybag, and technical KCl 0,4 g/polybag. The media that were used to plant were 11,52 kg/polybag (BKU) of Ultisol Jasinga with 208, 46 g/polybags compost and 42,4 g/polybags lime. The results from the analysis of covariance showed that the treatment from the Baode soil material and GD liquid fertilizer have a significant effect in some of the results that has been analyzed and the parameters that were observed in the field. On the 3 MAP (Month after Planting) yields of crops, BTRS and BTR treatments have the best growth, but when entering the age of 6 MAP the best treatments were found in GR, GRS, BTR, BTRS. The plant growth in the GR treatment practically the best if seen from its height, as seen from the early days of planting. The condition of plant roots during 3 MAP, KT treatment had the best 3 length of roots. This condition changed when the plants were 6 MAP, GRS treatment has the best length of root among other treatments. The highest value of total dry weight of plants at 3 MAP was in BTRS treatment that was 2,25 g/polybag, whereas in 6 MAP was in the GR treatment that was 19,57 g/polybag. The highest value of plant nutrient uptake at 3 MAP was the element of N, P and K contained in the BTRS treatment, while at 6 MAP found in GR treatments. The high values of absorption on these two treatments were because their values on the dry weight were high. This was caused by the effect of the growth hormone on leaf Baode soil material and GD liquid fertilizer and the influence of B. laterosporus that exists on the root Baode soil material
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Judul: Truncated Stop Loss as a Optimal Solution of Reinsurance Agreement in One-Period Model
Abstrak: Reinsurance is one of risk management efforts of an insurance company, which is called the cedent. Similar with insurance, reinsurance constitutes the cedent to pay the premium. We consider one-period reinsurance model and derive a rule which minimizes the ruin probability of the cedent for a fixed reinsurance premium. Therefore, it is needed to construct an optimal reinsurance agreement for the cedent. The premium is calculated according to four different principles, i.e. economic, generalized zero-utility, Esscher, and mean-variance principles. Stop loss is a reinsurance contract which protect the insurance company for losses that exceed a certain amount. The result of this research shows that a truncated stop loss is an optimal agreement in the class of all reinsurance contracts with various premiums calculated using above mentioned principles.
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