Judul: Uji daya hasil sembilan galur harapan kedelai hasil persilangan kultivar slamet dengan nokhonsawon di lahan asam
Abstrak: The objective of this experiment was to test the productivity of nine lines of soybean on the acid land. This experiment was carried out by using split plot design, with three replications. The main plot was liming treatment and the sub plot was lines/cultivars of soybean. Nine soybean lines tested in this experiment are KH 9,KH 10, KH 11, KH 28, KH 35, KH 38,KH 40, KH 42,KH 44, and four cultivars i.e. Slamet, Panderman, Willis, and Tanggamus were used as standard. The seeds were planted in the distance of 40 cm x 20 cm, and each plot was 2.5 m x 3 m.
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Judul: Uji daya hasil delapan galur harapan kedelai hasil persilangan Kultivar Slamet dengan Nokonsawon
Abstrak: BEKTI PRIYO ATMAJI. Test of productivity of Eight Lines of Soybean from Crossing between Slamet and Nokonsawon Cultivars. Under direction of MUHAMMAD JUSUF and SUHARSONO. The experiment aimed to test the productivity of eight lines of soybean and effect of Bio P2000Z fertilizer to productivity of the lines. Randomized Complete Block Design was applied with two factors (cultivar and dose of Bio P2000Z fertilizer) and two blocks. The cultivars and lines tested were eight lines (KH 35, KH 38, KH 40, KH 42, KH 44, KH 55, KH 58, dan KH 71) and three cultivars (Panderman, Tanggamus and Slamet) as standard of comparison. The plants were treated and non treated with Bio P2000Z fertilizer . The experiment unit consisted of 5 x 3 m plot. The result of experiment showed that the eight lines have a productivity and seed size higher than Slamet. KH 42 has highest productivity and big seed. Bio P2000Z fertilizer has no significant effect to the productivity of lines and cultivars tested. It could be caused by unoptimal enviromental condition for microbe growth contained in fertilizer such as highly rainfall, low pH and low fertility of the soil.
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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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