Judul: Pengelolaan Pembibitan Karet (Hevea brassiliensis Muell Arg.) di Kebun Riset Balai Penelitian Sembawa, Sumatera Selatan
Abstrak: Internship activities was undertaken to improve the knowledge, skills, and field experience, and aims to determine the rubber nursery management and technique specialy about rubber seedling. Internship activities carried out at the Rubber Research Sembawa, South Sumatra from February to June 2014. Urusan Bahan Tanam (UBT) is combination between nursery and Prossesing Unit oil palm seeds (UPKS), so UBT has its own organization structure. Production planning of nursery is still constrained by the limitation land of rootstock, so that planning have to wait rejuvenation old rubber. Grafting is one of rubber propagation activities. Oculator capacity to perform of grafting already compliant but grafting success rate still low was 73.3%. The quality of rootstock and scion are good, but the rootstock have bad quantity because limitation of land. Certification activities conducted by the Board of Certification and Crops Plantation. The proccess purchasing of rubber seedling direcly in UBT office or in marketing departement of Rubber Research Sembawa can be done. Consument have to pay 30% advance money from all payment of rubber and transportation of seed were provide by the consumers
Keyword: Bogor Agricultural University (IPB), rubber, rootstock, nursery, Grafting, budwood

Judul: Pembibitan tanaman karet (Hevea brasiliensis Muell. Arg.) di kebun Batulawang PT Perkebunan Nusantara VIII (Persero) Ciamis, Jawa Barat
Abstrak: Karet (Hevea brasiliensis Muell. Arg) merupakan salah satu komoditas ekspor non migas yang memiliki peran penting dalam pembangunan ekonomi Indonesia. Komoditas ini menjadi salah satu primadona penghasil devisa negara dari sektor perkebunan. Kegiatan magang ini bertujuan untuk meningkatkan relevansi atau keterkaitan dan kesesuaian antara proses pendidikan dengan lapangan pekerjaan serta mengkaji lebih dalam suatu aspek khusus mengenai budidaya tanaman yaitu pembibitan karet. Kegiatan magang dilaksanakan di Kebun Batulawang, PT Perkebunan Nusantara VIII (Persero) Ciamis, Jawa Barat, selama 4 bulan kerja, dimulai dari tanggal 11 Februari sampai 11 Juni 2002. Metode kegiatan magang dalam mengumpulkan data adalah dengan melaksanakan kegiatan teknis lapangan dan kegiatan manajemen kebun, pengumpulan data primer, serta pengumpulan data sekunder. Data primer diperoleh dari hasil pengamatan kegiatan di lapang, sedangkan data sekunder diperoleh dari kantor kebun. Pengelolaan tanaman karet yang terdiri dari beberapa kegiatan seperti okulasi, penanaman omat (okulasi mata tidur) ke polybag, pemeliharaan TBM dan TM serta penyadapan merupakan suatu rangkaian teknis lapangan yang terkait satu sama lain dan sangat menentukan umur ekonomis tanaman tersebut. Pelaksanaan keseluruhan kegiatan tersebut sangat berpengaruh terhadap kesehatan dan produktivitas tanaman karet, oleh sebab itu perlu dilakukan sebaik mungkin. Perbanyakan tanaman di Kebun Batulawang dilakukan dengan okulasi. Okulasi merupakan penempelan mata tunas dari tanaman batang atas ke tanaman batang bawah yang keduanya bersifat unggul. Teknologi pembuatan bibit polybag yang dilakukan di Kebun Batulawang menggunakan sistem cor, supaya jumlah bibit yang hidup meningkat. Data primer diperoleh dari pengamatan % keberhasilan okulasi pada berbagai kondisi daun batang bawah, % keberhasilan tiap klon, tinggi tunas pada…dst
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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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