Judul: Pengaruh Frekuensi Penyiraman pada Fase Bibit terhadap Pertumbuhan Bibit dan Dampaknya pada Pertumbuhan Tanaman Jarak Pagar (Jatropha curcas L.).
Abstrak: The objective of the research was to determine the effect of watering frequency on the growth of seedlings in the three genotypes of Jatropha (Jatropha curcas L.), and the effects of watering frequency on seedling phase to the plants growth in the field. This research was conducted in the greenhouse, in the soil physics laboratory, and in the experimental field of Cikabayan, IPB Dramaga, Bogor, from March to December 2010. First experiment was used Randomized Complete Block Design (RKLT) with 2 factors, namely the frequencies of watering (5, 8, and 11 watering days) and genotypes of Jatropha (Biak, Bengkulu, and Bogor). Second experiment was used Randomized Complete Block Design with 1 factor, namely genotypes of Jatropha from the first experiment. The result of green house experiment showed that the watering frequency were affected plant height at 2 - 12 weeks after treatment (WAT), the number of leaves at 2 WAT, and the diameter of stem at 4 - 12 WAT. The genotypes only affected on the diameter of stem at 4 - 12 WAT and the number of leaves at 2 WAT. The interactions between watering frequency and genotype treatments was no effect on all variables. The three genotypes of Jatropha were observed (Biak, Bengkulu, and Bogor) had almost the same resistance to frequency of watering treatment. The best watering intervals at three genotypes of Jatropha in this research was the frequency of 8 watering days. The result of field experiment showed that the genotype treatment only affected on the diamater of stem at 2 WAT. The impact of watering frequency on all three genotypes of jatropha were not visible on plant growth in the field, both of vegetative and generative phases.
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Judul: Optimalisasi Pertumbuhan dan Produktivitas Jarak Pagar (Jatropha curcas L.) Melalui Aplikasi Pemupukan.
Abstrak: The study was conducted to determine the effect of fertilizer application (dose and time) on the growth and productivity of jatropha. Research conducted at PT. Indocement, Citeureup, Bogor regency in October 2010 - July 2011. This research using randomized complete block design (RCBD) two factors. The first factor is the dose of fertilizer, which consists of five levels, namely 0, 24, 36, 48, and 60 g / plant. The second factor is the time of fertilization, namely 2 and 14 week after transplanting (WAT). Type of fertilizer used is NPK fertilizer, with a ratio of 15:15:15. Data obtained from observations processed using various analysis (ANOVA). Observations made in the vegetative phase of growth (plant height, leaf number, number of branches, and trunk diameter) and the generative phase (the number of productive branches, number of panicles, number of fruits, fruit weight, seed number and seed dry weight). Most of the dose of fertilization no significant effect on plant growth vegetative phase, except in the number of primary branches in 12 WAT. Significantly affect the dose of fertilization treatment increased the number of fruit and branches of productive. In general, from several observation variables (plant height, stem diameter, number of fruit, and productive branch) 48g/tanaman dose treatment tended to give better results. Fertilizer at 14 WAT is more effective, because it can have any number of fruit, fruit weight, seed number and seed dry weights were markedly higher than the 2 WAT treatment.
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Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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