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: 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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