Judul: Pengembangan Pasar Produk Pellet Hijauan Indigofera Zollingeriana
Abstrak: Penelitian ini bertujuan untuk mengidentifikasi permasalahan konsumen,, menemukan segmen pelanggan, dan menawarkan solusi untuk permasalahan konsumen untuk produk pellet hijauan Indigofera zollingeriana. Metode yang digunakan menggunakan pendekatan kualitatif dengan metode riset aksi dengan tahapan pengembangan pasar yang terdiri atas perancangan hipotesis model bisnis, pengujian masalah sebanyak 20 responden, pengujian solusi, dan verifikasi. Adapun permasalahan utama, diantaranya: harga pakan konsentrat yang cenderung mahal, peningkatan ADG (Average Daily gain)/ penambahan bobot per hari nya yang tidak sesuai harapan, dan pakan yang kurang praktis. Produk pakan pellet hijauan Indigofera zollingeriana menawarkan solusi tersebut. Hasil pengujian solusi menunjukkan produk pakan pellet hijauan Indigofera zollingeriana sesuai dengan pelanggan dan harga penjualan yang diminati, yakni Rp 4 600/kg.
Keyword: pakan, hijauan Indigofera zollingeriana, pengembangan pasar, riset aksi, model bisnis

Judul: Potensi Hijauan Pakan di Bawah Naungan Indigofera zollingeriana Miq. dengan Status Umur Tanaman Berbeda
Abstrak: Penelitian ini bertujuan mengukur potensi hijauan pakan di bawah naungan tanaman Indigofera zollingeriana dengan status umur berbeda di Unit Pendidikan Penelitian Peternakan Jonggol. Metode yang digunakan adalah observasi langsung di lapang Data dianalisis menggunakan analisis deskriptif. Parameter yang diukur adalah karakteristik tanah, kelembaban, suhu, intensitas cahaya, tingkat naungan, komposisi botani, kapasitas tampung, analisis vegetasi, identifikasi hijauan, produksi biomassa, kualitas fisik silase, serta palatabilitas silase. Hasil penelitian menunjukkan terdapat 16 spesies dari 3 lahan indigofera yang berbeda umur dan berpotensi menjadi hijauan pakan. Simpulan dari penelitian adalah perbedaan umur vegetasi sangat mempengaruhi jenis tumbuhan dan spesies yang tumbuh dibawah naungan dan intensitas cahaya pada lahan tersebut. Tanaman yang berpotensi menjadi pakan ialah Sphagneticola trilobata (L.) Pruski. yang mendominasi lahan Indigofera 7 tahun karena sifat tanaman yang membutuhkan cahaya dan kandungan nitrogen yang tinggi., This study evaluated the potential for forage production under Indigofera zollingeriana plants of varying ages at the Unit Pendidikan Penelitian Peternakan Jonggol (UP3J). The method employed involved directly observing the forage growth under the Indigofera gardens. The data collected were analyzed using descriptive analysis, with parameters such as soil characteristics, humidity, temperature, light intensity, shade level, botanical composition, storage capacity, vegetation analysis, forage identification, biomass production, silage physical quality, and silage palatability taken into consideration. The study revealed that 16 species of plants across three Indigofera fields of different ages had potential for forage production. The research concluded that the age of vegetation significantly affects the types of plants and species that grow under shade and the light intensity on the land. Sphagneticola trilobata (L.) Pruski was identified as one of the plants with the potential to become a food source, and it dominates the year 7 Indigofera land due to its need for light and high nitrogen content.
Keyword: analisis vegetasi, Indigofera zollingeriana, rumbah, umur vegetasi

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.
Keyword: