Judul: Pengelolaan Organisme Pengganggu Tanaman secara Organis di Pondok Modern Sumber Daya At-Taqwa, Nganjuk, Jawa Timur
Abstrak: Pertanian organik merupakan teknik budidaya pertanian yang menggunakan bahan-bahan alami seperti pupuk organik dan pestisida nabati. Tujuan utama pertanian organik adalah menyediakan produk pertanian, terutama bahan pangan yang aman bagi kesehatan masyarakat, tetap menjaga lingkungan sekitar serta estetika lingkungan. Penelitian ini bertujuan mempelajari sistem budidaya yang diterapkan POMOSDA, mempelajari OPT yang menyerang tanaman budidaya serta cara pengelolaan OPT yang dilakukan. Pengamatan dilakukan pada tanaman hortikultura dan tanaman tahunan. Metode yang dilakukan dalam penelitian ini adalah wawancara civitas pondok pesantren dan pengamatan lapang untuk mengamati keragaman OPT secara visual (langsung). Pengumpulan data dilakukan dengan cara pengamatan langsung dengan mengamati OPT yang terdapat dalam tanaman contoh tersebut. Setelah itu OPT yang ada diidentifikasi. Hasil OPT yang didapat ada 3 jenis yaitu Delphacidae, Tabanidae, dan Scarabaeidae. Pola Tanam Sehat dan Amanah (PTSA) adalah usaha dalam memberdayakan dan mengoptimalkan potensi alam pada pengelolaan terpadu untuk memakmurkan bumi Allah. Keunggulan program ini adalah dapat mempersingkat waktu tanam. Pengendalian yang dilakukan adalah pengendalian preemtif yaitu menghitung kalender tanam, menggunakan pupuk organik cair, penyemprotan pestisida nabati menggunakan barrier dan membuat saluran antar lahan. Pupuk organik cair yang digunakan adalah Manutta Gold. Produk ini dapat digunakan sebagai pupuk organik maupun pestisida nabati. Manutta Gold terbagi menjadi dua jenis, yaitu Manutta Gold Atas dan Manutta Gold Bawah., Organic farming is an agricultural cultivation technique that uses natural ingredients such as organic fertilizers and vegetable pesticides. The main objective of organic agriculture is to provide agricultural products, especially foodstuffs that are safe for public health, while maintaining the surrounding environment and environmental aesthetics. This study aims to study the cultivation system applied by POMOSDA, study the pests that attack cultivated plants and how to manage the pests. Observations were made on horticultural crops and perennial crops. The method used in this study was interviews with the Islamic boarding school community and field observations to observe the diversity of pests visually (directly). Data collection was carried out by direct observation by observing the pests contained in the sample plants. After that the pests are identified. The results there were 3 types of pests is Delphacidae, Tabanidae, and Scarabaeidae. Pola Tanam Sehat dan Amanah (PTSA) are efforts to empower and optimize natural potential in integrated management to prosper God's earth. The advantage of this program is that it can shorten the planting time. The control that is carried out is preemptive control, namely calculating the planting calendar, using liquid organic fertilizers, spraying vegetable pesticides, using barriers and creating channels between fields. The liquid organic fertilizer used is Manutta Gold. This product can be used as an organic fertilizer or as a vegetable pesticide. Manutta Gold is divided into two types, namely Manutta Gold Atas and Manutta Gold Bawah.
Keyword: organic agriculture, pest and disease, pola tanam sehat dan amanah

Judul: Preparation of Integrated Pest Management Design on Organic Farming Land at Rosy's Veggies Farm Sukabumi
Abstrak: Pertanian organik merupakan salah satu cara budidaya yang dapat mendukung pelestarian lingkungan dan tidak terlepas dari serangan hama. Pengendalian hama terpadu merupakan salah satu upaya untuk mengatasi hama yang menyerang pertanian organik. Rosy's Veggies Farm merupakan salah satu pertanian organik yang belum sepenuhnya menerapkan prinsip pengendalian hama terpadu dalam memantau dan mengendalikan hama. Kegiatan ini bertujuan mengembangkan desain pengendalian hama terpadu yang sesuai dengan pertanian organik di Rosy's Veggies Farm Sukabumi.Kegiatan ini meliputi pemantauan serangga menggunakan 3 jenis perangkap yaitu yellow sticky trap, pitfall trap dan light trap, pengamatan tanaman bergejala pada tanaman brokoli, buncis, dan sawi pahit, dan pengembangan desain pengendalian hama terpadu yang spesifik. Dari hasil perangkap, hama banyak ditemukan pada yellow sticky trap. Hama utama pada brokoli adalah Crocidolomia pavonana dan Myzus persicae, hama pada sawi pahit adalah Bradybaena similaris, Phyllotreta striolata dan Crocidolomia pavonana, hama pada buncis adalah Liriomyza sp. dan Henosepilachna sp. Berdasarkan hasil pengamatan, wawancara dan keterlibatan langsung dalam proses pengendalian hama, maka dapat diusulkan rancangan yang mengikuti pengendalianhama terpadu yaitu pemanfaatan PGPR, musuh alami, agens hayati, pestida nabati, tumpang sari dan biofumigasi., Organic farming has been championed as an environmental friendly farming methods and is align with conservation issues, however, the crops are still not immune from pest attacks. Integrated pest management is one of the efforts to overcome pests that attack organic farming. Rosy's Veggies Farm, an organic farm in Sukabumi, Jawa Barat has not fully implemented the principle of integrated pest management in their pest monitoring and pest management practices. This activity aimsto develop an integrated pest control design that issuitable for organic farming at Rosy's Veggies Farm Sukabumi. This activity includes insect monitoring using 3 types of traps, yellow sticky trap, pitfall trap and light trap, observation of symptomatic plants in broccoli, chickpea and bitter mustard plants, and development of specific integrated pest management designs. From the trap results, many pests were found in the yellow sticky trap. The main pests on broccoli were Crocidolomia pavonana and Myzus persicae, pests on bitter mustard were Bradybaena similaris, Phyllotreta striolata and Crocidolomia pavonana, pests on chickpeas were Liriomyza sp. and Henosepilachna sp. Based on the results of observations, interviews and direct involvement in the pest management process, a design that follows integrated pest control can be proposed, use of PGPR, natural enemies, biological agents, vegetable pesticides, intercropping and biofumigation.
Keyword: Insect monitoring, integrated pest control, organic farming

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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