Judul: Pengaruh jumlah daun bibit tanaman sagu (Metroxylon sp) terhadap pertumbuhan awal di lapangan
Abstrak: The experiment was did to know the effect of number leaves on sago palm seeedling after nurserry for the early growth on the field. The experiment was did 3 month (observation) and 2 month preparing the experiment, starting of februari 2012 until juni 2012. The experiment located on PT. National Sago Prima. Selat Panjang, Riau. The treatment were arranged in completely randomized design. The treatment investigated were the use of seedling at one leaves, two, three or more than (control), and without leave with six replication. The sample taken from each replication, ten sample for each treatmen in replication. The seedling were planted on the hole with size 40 cm x 40 cm x 40 cm. The result show that the trearment had a significant effect on additional leave, length and width leafe in the new leave (1 and 3), and for ecah variable on the new leave number 4. The treatment had a significant effect on the optimum condition for growth (appearance new leave). The treatment two leave had not significant effect with control treatment. The treatment without leave had lowest value than the other. The positif respons had showing from the treatment two leave on increasing leave, and percentage of life on the field. The highest precentage of life has showing from the treatment two leave with 65% and the lowest showing from the treatment without leave with 15 %.
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Judul: Pengelolaan budidaya sagu (Metroxylon spp.) Di PT National sago prima, Selat Panjang, Riau dengan aspek khusus pemangkasan dan aplikasi
Abstrak: The study was conducted in PT National Sago Prima, Selat Panjang, Riau on February to June 2011. The study aimed to provide knowledge, skills, technique capability and management of sago palm especially in sago nursery. The method are direct for getting primary data and indirect for secondary data. Secondary data takes from interviewing and discussing with the company staff and literacy study to get more information. Generally, the primary data could get from technique activity in the field but the focus case in sago nursery. The experiment was conducted to obtain information in a nursery on the effects of trimming and organic hormone application. The experiment was arranged in Split-plot design, where the main plot was trimming on sucker petiole with three factors (without trimming (P0), trimming 20 cm above baneer (P1), and trimming 30 cm above baneer (P2)) and the subplot was four factors of application of organic hormone (without concentration (H0), concentration 1ml/l (H1), concentration 3 ml/l (H2), and concentration 5 ml/l (H3)). The result showed trimming on sucker petiole was significant difference in presentation survival rate and vegetative growth. Trimming 20 cm above baneer (P1) better than trimming 30 cm above baneer (P2) and without trimming (P0). Generally, organic hormone application didn’t show any significant difference, but organic hormone application concentration 5 ml/l (H3) was significant difference in number of sucker leaves, new leaf length, and trimming leaf wide. The interaction between treatments was significant difference in trimming leaf length and number of sucker new leaflet. Based on average value trimming 20 cm above baneer and without concentration (P1H0) showed the best result in survival rate and number of sucker leaves. The survival rate of sucker was positively correlated with the emergence of breath root. The results of this experiment showed that the hight survival rate of sucker displayed higher percentage of emergence breath root.
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Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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