Judul: Hormonal Study on Fruit Drop of Mango (Mangifera indica L).
Abstrak: Percobaan bertujuan untuk. mengetahui pola kerontokan buah empat kultivar mangga, mempelajari perbedaan pertumbuhan buah mangga retensi dan buah akan rontok, mempelajari kaitan antara perubahan kandungan beberapa z.at endogen dan kerontokan buah, clan mempelajari pengaruh pemberian NAA dan GA3 ,clan pengaruh pemberian poliamin dalam mengurangi kerontokan buah mangga Percobaan terdiri atas empat bagian, yaitu : I. Pola Kerontokan Buah, 2. Studi Karakter Fisiologis Buah Retensi clan Buah akan Rontok, 3. Peningkatan Retensi Buah dengan Pemberian NAA dan GA3, dan 4. Peningkatan Retensi Buah dengan Pemberian Poliamin Perco6aan I menggunakan empat kultivar mangga yaitu Gadung 21, Lalijiwo, Golek 31, clan Manalagi 69. Peubah yang diamati meliputi jumlah bunga, jumlah daun clan nisbah C:N daun, komponen produksi clan produksi mangga Percobaan II menggunakan kultivar Gadung 21 (kerontokan buah tinggi) dan Lalijiwo (kerontokan buah rendah). Peubah yarig diamati meliputi kandungan poliamin, ACC, auksin, pati clan gula total. Percobaan III merupakan percobaan faktorial dua faktor menggunakan kultivar Gadung 2l(mempunyai nilai komersial tinggi). Faktor pertama adalah konsentrasi NAA : 0, 10, 30, 100 ppm, faktor ke dua adalah konsentrasi GA3 : 0, 30, I 00 ppm. Peubah yang diamati adalah komponen produksi clan produksi mangga. Percobaan IV menggunakan kultivar Gadung 21, faktor yang dicoba adalah pemberian putresin, spermidin, dan sperm.in masing-masing dengan konsentrasi 104 clan 10- M. Peub~h yang diamati sama dengan Percobaan IV. Hasil penelitian menunjukkan bahwa Gadung 21, Golek 31, Lalijiwo, clan Manalagi 69 memp,myai satu puncak kerontokan buah. Puncak kerontokan terjadi pada saat 6 Harl Setelah Anthesis (HSA) untuk kultivar Gadung 21 clan Manalagi 69, dan 9 HSA untuk kultivar Golek 31 dan Lalijiwo. Puncak kerontokan terjadi pada saat nisbah C:N mencapai nilai terendah. Kerontokan buah disebabkan oleh kandungan etilen yang tinggi dan pasokan asimilat yang rendah. Buah yang akan rontok menunjukkan kandungan poliamin dan auksin yang lebih rendah dan kandungan pati dan ACC yang lebih tinggi dibandingkan buah retensi. Pemberian NAA, GA3, clan poliamin cenderung menurunkan persentase kerontokan buah dan meningkatkan jumlah buah dipanen per malai. Pemberian NAA dengan konsentrasi 100 ppm menunjukkan jumlah buah dipanen per malai tertinggi sebesar 1,03 (meningkat 32% dibandingkan tanpa pemberian NAA). Pemberian spermidin dengan konsentrasi 10-3 M menunjukkan jumlah buah dipanen per malai tertinggi sebesar 1,1 (meningkat 83% dibandingkan tanpa pemberian spermidin)., The research was aimed at studying fruit drop of four cultivars of mango, studying growth differences between persisting and abscising fruits, studying relationship between content of endogenous substances and fruit drop, and studying the effect of NAA and GA3 and polyamines application on increasing fruit retention. The research consisted of four stages, namely : 1. Pattern of fruit drop, 2. Study on physiological characters of persisting and abscising fruits, 3. Study on increasing fruit retention by NAA and GA3 application, and 4. Study on increasing fruit retention by polyamines application. The first research used four cultivars of mango, namely Gadung 21, Golek 31, Lalijiwo, and Manalagi 69. Observed variables were number of flowers, number of leaf and leaf C:N ratio, production components and production of mango. The second research used Gadung 21 (high fruit drop) and Lalijiwo (low fruit drop) cultivars. Observed variables were content of
Keyword: gifera indica, Hormon endogen, NAA, GA 3

Judul: Analisis keragaman morfologi tanaman manggis (Garcinia Mangostana L.) dari empat sentra produksi di Bali
Abstrak: Mangosteen population has been reported performed apomixis reproduction, lead to assumption genetically homogen. Early studies showed that there were variation among mangosteen population. However the variation could be originated from environment variation. To elucidate genetic variability among mongosteen population in more detail seedling from Purworejo, Purwakarta, Leuwiliang and Trenggalek where grew at same environment in Bogor. The objective of this study is to analysis variability among mangosteen population from Purworejo, Purwakarta, Leuwiliang and Trenggalek. The studies was carried out in the origin of population for morphological character and at Bogor for seedling performance since February 2003 to July 2003. The plant material for this study were ten parent trees from each production centre and ten fruits from each trees, subsequently their seed used for seedling at Bogor. Obtained data analyzed by using homogenity of variance test (Bartlet test) and was continued with Tukey's Studentized Range Test. The plants in seedling were arranged in Completely Randomized Design consisted of four treatment with 10 replications. The result of this study was showed the homogenity variance in leaf weight, leaf area indeks, leaf length, leaf width, fruit weight, seed weight, number of seed. In seedling all character that observed had homogen variance. The analysis of mean morphological character showed that Trenggalek might had the best condition for mangosteen growth. Plant from Trenggalek showed the highest mean in leaf length, leaf width, plant height and number of leaf. All character that observed in seedling had high heritability. Comparison with other study in 2002 and 2001 showed that population had the same result in homogenity variance, was performed that leaf area index, leaf length, leaf width, plant height and number of leaf had homogen variance. It showed that mangosteen population probably had a stable response to enviromental influence
Keyword: apomixis reproduction, Completely Randomized Design, mangosteen population

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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