Judul: he development of mycorrhizal research in the last 10 yeras in Indonesia
Abstrak: Mikoriza merupakan suatu hubungan symbiosis mutualisme anatara akar tanaman dengan fungi. Tujuan penelitian dilakukan untuk mengetahui perkembangan penelitian mikoriza pada periode 1980 hingga 2020 dan mengetahui fokus utama peneliti pada penelitian mikoriza pada 10 tahun terakhir. Data dikumpulkan dari situs portal garuda dan situs lainnya di internet. Hasil penelitian menunjukkan bahwa aspek terbanyak yang diteliti berasal dari kelompok Fungi Mikoriza Arbuskula dengan kategori dominan peningkatan pertumbuhan dan jenis komoditas terbanyak pertanian., Mycorrhiza is a symbiotic mutualism between the plantroots with fungi. The research aims to describe the development of mychorrizal research during periode of 1980 to 2020 and to know more specific interest of mycorrhizae research in Indonesia within last 10 years. Data were collected from portal Garuda situs and other situs in internet. The results show that the most interest aspects studied were Arbuscular mycorrhizal fungi with emphasies on increasing growth and commodity types mostly agriculture.
Keyword: mikoriza, perkembangan penelitian, simbiosis mutualisme, mychorriza, research developments, symbiosis of mutualism

Judul: Populasi dan Keanekaragaman Fungi Mikoriza Arbuskula Pada Ekosistem Kebun Kelapa Sawit di Jambi
Abstrak: Mikoriza adalah suatu struktur sistem perakaran sebagai manifestasi adanya simbiosis mutualisme antara fungi dan perakaran tumbuhan tingkat tinggi serta memiliki manfaat meningkatkan efektifitas akar tanaman dalam penyerapan nutrien dan air dalam tanah. Tujuan penelitian ini menganalisis keaneakaragaman dan populasi FMA pada ekosistem kebun kelapa sawit di Provinsi Jambi yang diberi perlakuan pemeliharan tanaman, serta untuk mengetahui perbedaan sporulasi FMA dengan media penangkaran Zeolit. Pengambilan sampel tanah diambil di lahan kelapa sawit di Provinsi Jambi. Penangkaran (trapping) dilakukan pada pot kecil berukuran 200 ml. Analisis data dilakukan menggunakan aplikasi SPSS 22 untuk mengetahui perbedaan perlakuan yang diberikan. Hasil penelitian menunjukkan bahwa perlakuan pemeliharaan tanaman memiliki pengaruh nyata terhadap peningkatan jumlah spora FMA. Perlakuan pemeliharaan tanaman tidak memberikan pengaruh terhadap kolonisasi akar inang. Genus spora yang ditemukan pada lahan kelapa sawit adalah genus Glomus, Acaulospora, Gigaspora dan Scutellospora dimana tidak terdapat perbedaan jumlah genus pada saat sebelum dan setelah adanya trapping., Mycorrizae is a root system that manifesting the symbiotic mutualism between fungus and plant, and mycorrizae also have a benefit such as increase the effectiveness of plant root in water and nutrient absorption. The objective of this research are to analyses the diversity and population of AMF on oil palm land Jambi Province, and to study the difference of AMF sporulation with zeolit as a media. Soil sample were collected from oil palm land in Jambi Province. Spore trapping using small pots with 200ml sized. Data analysis is using SPSS 22 app to get difference of treatment that used to the sample. The result of the research are shown that plant maintenance technique have a significant effect to increase the spora amount. Plant maintenance technique do not have a significant effect to AMF sporulation. Identified AMF genera are Glomus, Acaulospora, Gigaspora and Scutellospora which does not have any difference with before and after trapping treatment.
Keyword: arbuscular mycorrhizal fungi, biodiversity, oil palm plantation, plant maintenance technique

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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