Judul: The Study on Seed supply system of certified seed in South Sulawesi
Abstrak: The objectives of this study are to : (1) obtain characteristics information of soybean farmer and breeders in South Sulawesi, (2) collect demand and supply information of qualified seeds in South Sulawesi as well as current seed supply systems, and (3) identify alternative supply system improvements for qualified seeds through Jabalsim. The research method is survey in four regencies in South Sulawesi, namely Takalar, Bone, Soppeng, and Wajo. Each regency consisted of five districts and each district consists of 10 respondents. Thus, the number of respondent for each district is 50 persons or totally 200 persons for the four regencies. The data consisted of primary and secondary data, and analyzed descriptively and SWOT analysis. The results of the research show that farmer/ seed breeder in the study site is still in productive age, having at least elementary education level, experienced in farming and soybean seed breeding and sufficiently farm size. Supply for Soybean seed has been fulfilled, namely 1198.60 tons. The production realization/availability of soybean seed was 1479.02 tones. Currently, seed supply system is formal and informal (Jabalsim). Policy implication from the proposed strategy are: (1) perform certification on seed obtained from seed supply system in Jabalsim until farm certification, in turn farmers can use qualified seeds on time, and (2) The next certification process at laboratory level remains implemented to meet legal aspects in the form of labeling, so that the result is certified seed.
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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: 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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