Judul: Sistem Penyediaan Benih dan Teknologi Invigorasi untuk Mendukung Ketersediaan Benih Kedelai Bermutu di Provinsi Banten
Abstrak: Research divided into two sub researches. Research 1: Soybean seed system in Banten Province. The aim of research 1 was to study soybean seed availability system in Banten Province. Research 2: Invigoration technology to improve seed vigour, plant growth and yield of soybean. The aim of research 2 was to get and to apply invigoration technology to improve seed vigour, plant growth and yield of soybean. Result of research 1 showed that soybean seed system in Banten Province has used Jabalsim pattern with some modification. Result of SWOT analysis showed position of the system was in 1st quadrant with aggressive strategy as best strategic planning: (1) improving knowledge of seed growers in producing seed, maintaining and improving quality of the seed produced by providing extension service and training, and supervising by Seed Supervising and Certification Office (BPSB); (2) making legal corporation (MoU) between seed growers and PT SHS; and (3) increasing seed production to fulfill the demand of soybean seed. In order to fulfill the need of soybean seed in Banten Province, Jabalsim pattern can be used with better seed production planning by empowering local seed growers. Map of center production area and plan of planting can be helpful to make better seed production planning. Result research 2 showed that matriconditioning using powder of burned rice hull plus commercial Rhizobium inoculant improved seed viability and vigour. This invigoration treatment also improved plant growth and yield by increasing effective nodules, filled pod, yield per plant, yield per plot and potential of yield better than control. Seed invigoration treatment before planting did not influence quality of the seed produced. Seed invigoration using matriconditioning plus Rhizobium should be recommended to be applied by seed growers in order to improve soybean seed quality and to increase soybean production in Banten Province.
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Judul: Kajian teknologi produksi benih kedelai pada berbagai agroekologi lahan di Provinsi Jambi
Abstrak: The national soybean production tend to decline in the last decade. This problem requires attention and research to find some solutions. The aim of this research is to Study the characteristic of seed grower of soybean farmers in the three agro-ecological land; Learning the technology that used by the seed grower of soybean farmers in different agro-ecological; Studying the analysis of farming technology that used and the costs incurred; and Studying the relationship between the technology and financial analysis in several agro-ecological land. This research was conducted from October 2010 through January 2011 in East Tanjung Jabung (Swamp Land), West Tanjung Jabung (Wetland irrigation) and Tebo Regency (Dryland). The method used in this research is secondary data collection on soybean seed production technology, that is the recommendation of Legume and Tuber Crops Research Institute. Furthermore, the survey method to collect primary data that obtained through interviews with seed grower directly. Purposive sampling method by seed grower as respondents, were taken of ten seed grower at each region. The results showed that age characteristics of seed grower more productive, low education levels and experience became a certified seed grower is still under four years; the implementation percentage of seed production technology in three different agroecology in the application of technology; financial analysis in three agro-ecological land is valuable as a profitable farm seed production; and there is a strong relationship between the using of seed production technology and the revenue.
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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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