Judul: Perbanyakan Bibit Tanaman Hortikultura dan Permasalahannya di Kebun Pembibitan Ragunan dan Ciganjur Dinas Pertanian DKI Jakarta
Abstrak: Tujuan pengembangan produksi hortikultura terutama dimaksudkan untuk (1) memperbaiki gizi masyarakat, terutama yang berpenghasilan rendah, (2) memperbesar devisa negara dengan mengurangi impor dan meningkatkan ekspor, (3) memperluas kesempatan kerja dan meningkatkan pendapatan masyarakat, dan ( I + ) memenuhi kebutuhan akan keindahan dan kesesuaian lingkungan.
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Judul: Usahatani terpadu lahan kering kelompoktani sadagori kampung Nangela, Jampang Tengah Kabupaten Sukabumi
Abstrak: Dalam mencapai tujuan pembangunan di sektor pertanian selama PELITA IV, terutama yang berkaitan dengan peningka- tan produksi bahan makanan pokok telah mencapai hasil yang memuaskan. Namun demikian peningkatan produksi tanaman hortikultura umumnya belum seimbang dengan peningkatan per- mintaan, Tanaman hortikultura memegang peranan penting se- bagai bahan makanan sumber gizi dalam rangka perbaikan me- nu makanan rakyat. Peningkatan permintaan produk-produk hortikultur lebih banyak disebabkan oleh meningkatnya jum- lah penduduk, meningkatnya tingkat pendapatan dan semakin tingginya kesadaran masyarakat tentang perlunya makanan bergizi. Meningkatnya permintaan produk-produk pertanian khu- susnya hortikultur tidak saja dalam segi kuantitas tetapi juga segi kualitas. Dampak yang secara langsung terasa a- dalah meningkatnya harga dan juga import produk-produk per- tanian. Untuk menanggulangi masalah tersebut perlu diambil tindakan-tindakan yang memadai, misalnya melalui program intensifikasi, penanganan pasca panen, perluasan areal dan ketepatan pola tanam. Dalam usaha peningkatan produksi hortikultur khususnya, aspek iklim dan cuaca memegang pera- nan penting karena hampir semua aspek pertanian, yaitu mu- lai dari pemilihan jenis tanaman, pola bertanam, saat tanam, tehnik budidaya maupun perlindungan tanaman dipengaruhi ...
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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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