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: Karakteristik Permainan ELLO yang Dapat Dimenangkan
Abstrak: This manuscript presents some proofs of prepositions, corollaries, and a theorem, that provide some illustrations of winnable games of Elimination Lit-Lights Out (ELLO). This game is played on 2-colored graph, i.e. red and green, by choosing one by one vertices on the graph. A linear ordering of vertices on a graph is called strategy. The objective of the game is to eliminate all vertices on the graph. There are two prepositions, three corollaries and one theorem to be considered. Characteristics of a strategy that can win a given ELLO game are given in the first preposition. The second preposition discusses properties of a game that satisfy parity condition but can not be won. The first corollary discusses the relationship between strategy and winnable game. The second corollary gives characteristics of winnable game on a complete graph. The third corollary discusses the strategy and the reverse order of the strategy. The theorem on this manuscript states that winnable game will satisfy parity condition.
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