Judul: Foundation seed program to be a developing centre for the commercialization of the technologically produced seed-case of upland rice seed
Abstrak: Penelitian terdiri atas 5 percobaan, yaitu penelitian L adalah menentukan tingkat Distinghish (D) antara padi gogo Var. Gajah Mungkur, Kalimutu, Jatiluhur dan Way Rarem dengan menggunakan tolok ukur KSP, KCT, jumlah anakan, jumlah anakan produktif, jumlah butir per malai, berat 1000 butir dan produksi hektar'. Penelitian II adalah menentukan tingkat Uniformity (U) masing-masing varietas dengan tolok ukur keseragaman tinggi tanaman, jumlah anakan produktif dan panjang malai.
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Judul: the Effect of Fertilization on Growth and Production of Three Upland Rice Varietes
Abstrak: Padi gogo merupakan budi daya padi di lahan kering. Produktivitas padi gogo masih rendah. Penelitian ini bertujuan mempelajari pengaruh pemupukan pada pertumbuhan dan produksi Tiga Varietas padi lahan kering. Penelitian dilakukan selama 8 bulan yaitu April-Desember 2019 di Kebun Percobaan IPB Sawah Baru. Rancangan yang digunakan adalah Split plot RKLT dua faktor yaitu petak utama dan anak petak. Petak utama terdiri lima taraf yaitu tanpa pupuk (P0), pupuk hayati + pupuk NPK (P1), pupuk NPK (P2), pupuk organik 5 ton ha-1 + pupuk NPK (P3), pupuk organik 5 ton ha-1 d+ pupuk hayati + NPK (P4). Anak petak tiga taraf yaitu IPB 9G (V1), Inpago 10 (V2), dan Timur (V3). Pemupukan berpengaruh nyata terhadap tinggi tanaman, Bagan Warna Daun, jumlah anakan produktif, jumlah gabah hampa dan bobot gabah per rumpun. Varietas berpengaruh nyata terhadap jumlah anakan pada 5-9 MST, jumlah anakan tidak produktif dan jumlah anakan total., Gogo Rice is type of the rice which could be optimized cultivated in dry land. Unfortunately, the Gogo Rice’s productivity is lowest than the others. The aim of this research is to learn the effect of organic fertilizer to the growth and productivity of rice’s genotypes in dry land. The research takes place at Sawah Baru Research Field with 8 months research duration, May 2019-October 2019. The experiment was conducted in split-plot randomized complete block design with two factors, main plot and sub plot. The main plot consists 5 different fertilizers composition which are no fertilizer (P0), the organic fertilizer + NPK Fertilizer(P1), the NPK Fertilizer (P2), 5 tons ha-1 organic fertilizer + NPK Fertilizer (P3), 5 tons ha-1 organic fertilizer + composite fertilizer + and NPK (P4). The sub plot consists IPB 9G (V1), Inpago 10 (V2), and Timur (V3). The fertilization will affect the growth of the rice after 11 weeks planting with the indicator of color leaf, number of productive leaf, amount of empty rice’s grain, and the weight of collective grain. The sub plot gives significant effect on the number of productive for the period 5-9 weeks after planting, the number of unproductive leaf, and amount of total productive leaf. The best interaction between main plot and sub plot is the combination NPK Fertilizer and Organic Fertilizer.
Keyword: grain, panicle, IPB 9G, Timur

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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