Judul: Keragaan Penggunaan Dan Pengadaan Padi Varitas Unggul Bermutu Tinggi : Studi Kasus Di Desa Gebang Udik, Kecamatan Babakan, Kabupaten Cirebon
Abstrak: Praktek Lapang ini dilakukan pada tanggal 3 April 1986 sampai tanggal 3 Juni 1986, bersamaan dengan pelaksanaan Kuliah Kerja Nyata (KKN). Tujuan Praktek Lapang adalah mengetahui tingkat permintaan dan penyaluran benih padi bersertifikat dengan mengkaitkan selera petani dan pengetahuan petani terhadap benih, begitu juga dengan peranan lembaga penyalur benih dalam menjalankan fungsinya. Dengan semakin meningkatnya pengetahuan dan ketrampilan petani dibidang intensifikasi maka kebutuhan akan benih bermutu dan bersertifikat dirasakan semakin meningkat. Dilain pihak ketersediaan benih unggul bermutu sangat terbatas. Untuk menyediakan benih sejak tahun 1971, pemerintah mendirikan Proyek Pengolahan Benih I dan terus ditingkatkan melalui Proyek Pengolahan Benih II... Dalam penyaluran benih bersertifikat sejauh ini Perum Sang Hyang Seri dianggap memonopoli pasar, sehingga pihak swasta dan koperasi menjadi kurang berkembang. Padahal kebijaksanaan pemerintah dalam jangka panjang penyediaan benih bersertifikat secara berlahan akan diserahkan kepada pihak swasta dan koperasi. Sistem penjualan benih oleh Perum Sang Hyang Seri yang sangat menarik dengan memberikan potongan harga sebesar Rp 20.00 kepada penyalur, maka secara langsung atau tidak langsung memperkuat posisi Perum Sang Hyang Seri di pasar. Keadaan ini berbeda dengan produsen benih lain- nya, bahkan untuk penyaluran benih yang mereka produksi harus bekerjasama dengan Perum Sang Hyang Seri.
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Judul: Penelaahan Pengadaan Benih Padi Bersertifikat Perum Sang Hyang Seri UKKS Klaten I Melalui Sistem Kerjsama dengan Kelompok Tani Penangkar Benih
Abstrak: Dalam usaha melestarikan swasembada beras, yang antara lain dengan penerapan Sapta Usaha Tani, maka benih padi bersertifikat mempunyai peranan yang amat penting. Dengan demikian diperlukan usaha pengadaan benih bermutu tersebut secara mantap dan teratur, tetapi terjangkau harganya oleh petani. Perum Sang Hyang Seri merupakan Badan Usaha Milik Negara yang msngusahakan pengadaan benih unggul bermutu, diantaranya benih padi bersertifikat, sehingga merupakan komponen perbenihan yang bergerak dalam lini pengadaan benih.
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Judul: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
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