Judul: Physiological Quality of Peanut Seed (Arachis hypogeae L.) Variety Kancil with Different Sizes
Abstrak: Kacang tanah merupakan tanaman kacang-kacangan penting yang memiliki kandungan protein dan lipid yang tinggi. Produksi dan produktivitas kacang tanah ditentukan oleh kualitas benih. Penelitian ini bertujuan untuk mengidentifikasi pengaruh ukuran benih terhadap viabilitas dan vigor benih kacang tanah (Arachis hypogaea L.). Penelitian dilaksanakan pada bulan Januari hingga April 2023 di Laboratorium Pengolahan Benih dan Laboratorium Pengujian dan Penyimpanan Mutu Benih, Departemen Agronomi dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor. Penelitian disusun dalam faktor tunggal Rancangan Acak Lengkap dengan tiga kali ulangan. Perlakuan berupa ukuran benih yang dikelompokkan menjadi 4 kelompok yaitu kecil (≤0,75 cm), sedang (kecil  x  besar), besar ( 1,13 cm), dan tidak dipilah. Ukuran besar dan sedang memiliki permukaan biji yang halus, sedangkan ukuran kecil memiliki permukaan biji yang keriput. Semua ukuran biji diidentifikasi biji bulat. Ukuran benih berpengaruh nyata terhadap vigor benih, namun tidak berpengaruh nyata terhadap viabilitas benih. Ukuran benih yang besar menunjukkan vigor yang lebih tinggi dibandingkan ukuran lainnya. Ukuran benih tidak berpengaruh nyata terhadap daya simpan benih yang ditunjukkan dengan perkecambahan benih setelah pemasakan dipercepat. Penggunaan benih ukuran besar yang memiliki vigor tinggi sangat diperlukan untuk produksi dengan lingkungan yang kurang baik., Peanut is an important legume crop that has high proteins and lipids content. Peanut production and productivity were determined by seed quality. This research was aimed to identify the effect of seed size to peanut (Arachis hypogaea L.) seed viability and vigor. The research was carried out from January to April 2023 in Seed Procesing Laboratory and Seed Quality Testing and Storage Laboratory, Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural University. The research was arranged in single factor - A Completely Randomized Design with three reptitions. The treatment is seed size that was categorized in 4 groups, i.e small (≤0,75 cm), intermediate (small  x  large), large ( 1,13 cm), and unsorted. Large and intermediate sizes had smooth seed surface, while the small size had wrinkled seed surface. All the seed size were identified the round seed. The seed size has a significant effect to seed vigor, nevertheless did not significant to seed viability. Large seed size showed the higher vigor than other sizes. Seed size didn’t significant to seed storability vigor that was showed by germination of seed after the accelerated aging. The large seed size use that has high vigor is very required to unfavourable enviromentals production.
Keyword: AAT, diameter benih, intergritas membran, viabilitas, vigor, accelerated aging text, membrane integrity, seed diameter, viability

Judul: The Effect of Mung Bean Seed Size on the Physiological Quality of Mung Bean Seed
Abstrak: Kacang hijau termasuk salah satu komoditas unggul ekspor tanaman pangan. Upaya untuk meningkatkan produksi kacang hijau harus diimbangi dengan penyediaan benih yang memiliki nilai mutu benih tinggi. Mutu fisik dan mutu fisiologis termasuk dari aspek mutu benih. Penelitian ini bertujuan menganalisis pengaruh ukuran benih terhadap mutu fisiologis benih kacang hijau pada varietas Vima 1 dan Vima 3. Penelitian ini dilaksanakan pada bulan Mei sampai Juli 2023. Tempat pelaksanaan penelitian di Laboratorium Pengolahan Benih Seed Center dan Laboratorium Penyimpanan dan Pengujian Mutu Benih, Institut Pertanian Bogor. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan faktor tunggal yaitu ukuran benih dengan empat taraf ukuran (besar, sedang, kecil dan campuran). Taraf ukuran campuran berasal dari kondisi awal tanpa pemilahan. Hasil penelitian menunjukkan bahwa ukuran benih pada varietas Vima 1 berpengaruh terhadap bobot kering kecambah normal, indeks vigor setelah pengusangan, daya hantar listrik sebelum dan setelah pengusangan. Ukuran benih varietas Vima 3 berpengaruh terhadap indeks vigor setelah pengusangan, daya hantar listrik sebelum dan setelah pengusangan. Benih berukuran besar pada varietas Vima 1 memiliki bobot kering kecambah normal paling tinggi 0,85 g dengan kebocoran membran paling rendah dan nilai daya hantar listriknya 21,70 μS/ cm.g. Benih berukuran besar pada varietas Vima 3 memiliki nilai daya hantar listrik paling rendah disaat sebelum pengusangan 24,44 μS/ cm.g dan setelah pengusangan 18,60 μS/ cm.g. Benih berukuran besar hasil pemilahan dengan air screen cleaner menunjukkan mutu paling baik pada kedua varietas., Green beans are one of the leading export commodities for food crops. Efforts to increase green bean production must be balanced with the provision of seeds that have high seed quality values. Physical quality and physiological quality are included in the aspect of seed quality. This study aims to analyze the effect of seed size on the physiological quality of mung bean seeds in Vima 1 and Vima 3 varieties. This research was conducted from May to July 2023. The location of the research was the Seed Center Seed Processing Laboratory and Seed Quality Testing and Storage Laboratory, Institute of Agriculture Bogor. This study used a completely randomized design (CRD) with a single factor, namely seed size with four size levels (large, medium, small, and mixed). Mixed-size levels are derived from the initial conditions without sorting. The results showed that the seed size of the Vima 1 variety had an effect on the dry weight of normal sprouts, the vigor index after being worn out, and the electrical conductivity before and after being worn out. The seed size of the Vima 3 variety has an effect on the vigor index after obsolescence, and electrical conductivity before and after obsolescence. The large seeds of the Vima 1 variety had the highest dry weight of normal sprouts at 0.85 g with the lowest membrane leakage and an electrical conductivity value of 21.70 μS/ cm.g. Large seeds of the Vima 3 variety have the lowest electrical conductivity value before aging 24.44 μS/ cm.g and after aging 18.60 μS/cm.g. Large seeds as a result of sorting with air screen cleaner show the best quality in both varieties.
Keyword: ukuran benih, viabilitas, vigor, vima 1, vima 3

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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