Judul: Pengaruh Pembumbunan Dan Pupuk Kandang Ayam Terhadap Pertumbuhan Dan Produksi Bengle (Zingiber purpureum Roxb.)
Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh pembumbunan dan pupuk kandang ayam pada beberapa taraf terhadap pertumbuhan dan produksi rimpang bengle dalam rangka peningkatan produksi rimpang. Penelitian ini dilaksanakan di lahan petani,Desa Kayu Manis, Tanah Sareal - Bogor, dengan jenis tanah latosol merah coklat, dengan ketinggian lempal 240 m dpl. Penelitian ini dilaksanakan selama sembilan bulan mulai bulan Mei 2001 sampai dengan bulan Februari 2002.
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Judul: Pengaruh pemberian pupuk kandang terhadap perkecambahan, pertumbuhan bibit dan pengaruhnya terhadap produksi di lapang
Abstrak: Penelitian pengaruh pemberian pupuk kandang terhadap perkecambahan, pertumbuhan bibit dan pengaruhnya terhadap produksi di lapang dilaksanakan di rumah kaca BDP, kebun percobaan Muara Balittan dan Laboratorium Ilmu dan Teknologi Benih Baranangsiang. Penelitian dilaksanakan mulai bulan September 1994 sampai bulan Januari 1995. Penelitian ini bertujuan untuk melihat pengaruh dari pemberian berbagai jenis pupuk kandang terhadap perkecam- bahan dan pertumbuhan bibit serta pengaruhnya terhadap produksi di lapang. Benih yang dipakai adalah benih jagung manis (Zea mays saccharata). Penelitian terdiri dari dua percobaan, percobaan I untuk melihat pengaruh media yang diberi pupuk kandang terhadap perkecambahan benih dalam lingkungan yang terkon- trol, percobaan II untuk mengetahui pengaruh pupuk kandang terhadap pertumbuhan bibit dan pengaruhnya terhadap pro- duksi di lapang. Rancangan Percobaan I dan II yaitu Ran- cangan Acak Kelompok dengan 13 perlakuan. Perlakuan ter- diri dari kontrol, pupuk kandang ayam dengan dosis 5 ton /ha, 10 ton/ha, 15 ton/ha, 20 ton/ha. Pupuk kandang sapi dan kambing perlakuan sama seperti pupuk kandang ayam yaitu 5 ton/ha, 10 ton/ha, 15 ton/ha, dan 20 ton/ha. Tolok ukur yang diamati pada percobaan I yaitu daya ber- kecambah, keserempakan tumbuh dan bobot kering kecambah, pengamatan pada percobaan II yaitu daya tumbuh benih, vi- gor bibit, luas segitiga stamina, hari keluar malai, pan- jang dan lingkar tongkol, bobot 1000 butir, bobot tongkol dan bobot pipilan. Pengujian viabilitas benih yang diha- silkan karena perlakuan pupuk kandang dengan tolok ukur daya berkecambah, keserempakan tumbuh dan kecepatan tumbuh. Hasil penelitian menunjukkan bahwa pemberian pupuk kandang dapat meningkatkan pertumbuhan dan produksi di lapang. Pemberian pupuk kandang ayam dengan dosis di atas 5 ton/ha meningkatkan pertumbuhan tanaman dengan tolok ukur daya tumbuh, vigor bibit, luas segitiga stamina dan mempercepat keluarnya malai. Perlakuan pupuk kandang sapi dan kambing untuk parameter pertumbuhan tanaman tidak berbeda dengan kontrol…dst
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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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