Judul: Pengaruh Umur Pohon Tetua dan Jumlah Buku Stek Cabang terhadap Pertumbuhan Bibit Jarak Pagar (Jatropha curcas L.).
Abstrak: The research was conducted in February-July 2010 in the greenhouse and in the seed science and technology laboratory of agronomy and horticulture department, leuwikopo, Bogor Agriculture University,. The aim of this research to know the effect of mother plant age, internode numbers of stem cutting, and interaction on growth of seedling-stem cutting of Jatropha curcas Linn. Research method applied Randomize Complete Block Design with two factors, namely mother plant age (U) (U1=2 year, U2=3 year, and U3=4 year) and internode numbers (B) (B1= 10 internode, B2= 15 internode, and B3= 20 internode) with three replicates. The result showed that there are effects of mother plant age, internode numbers, and their interaction on growth of seedling-stem cutting of Jatropha curcas Linn. The mother plant age for the best sprout length, leaf length, and leaf width are 4 year and 2 year. The best internode numbers for the best sprout number are the 20 and 15 internode. Interaction between mother plant age and the best internode numbers according to the plant height parameter is mother plant age 4 year with 20 internode.
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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: 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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