Judul: Analisis Pendapatan Usahatani Padi System Of Rice Intensification (Sri) Dan Padi Konvensional Di Kecamatan Nagrak Kabupaten Sukabumi
Abstrak: SRI (System of Rice Intensification) merupakan teknologi budidaya yang diharapkan dapat meningkatkan produksi padi. Tujuan penelitian ini yaitu membandingkan keragaan usahatani, tingkat pendapatan, dan efisiensi antara usahatani padi SRI dan padi konvensional di Kecamatan Nagrak. Metode analisis yang digunakan adalah analisis pendapatan usahatani dan uji beda. Hasil penelitian menunjukkan nilai produktivitas usahatani padi SRI (5.91 ton per hektar) lebih besar dibandingkan usahatani padi konvensional (4.93 ton per hektar). Nilai pendapatan atas biaya total usahatani padi SRI (Rp 5 439 098 per hektar) lebih besar usahatani padi konvensional (Rp 1 891 923 per hektar). Sehingga dapat dinyatakan bahwa usahatani padi SRI lebih menguntungkan dibandingkan padi konvensional, serta usahatani padi SRI lebih efisien dibandingkan dengan padi konvensional dengan R/C rasio atas biaya total masing-masing sebesar 1.35 dan 1.12. Hasil uji beda menunjukkan adanya perbedaan nilai produktivitas, pendapatan atas biaya total, dan R/C rasio antara usahatani padi SRI dengan usahatani padi konvensional.
Keyword: padi konvensional, pendapatan usahatani, SRI

Judul: Analisis Pendapatan Usahatani Padi Metode System Of Rice Intensification (SRI) dan Padi Konvensional di Desa Kebonpedes, Sukabumi
Abstrak: System Of Rice Intensification known as SRI is a sustainable method of rice cultivation with organic treatment ever discovered in madagascar and continue to be developed in many countries one of which is Indonesia. The objectives of this research are to obtain rice cultivation method that can increase income and welfare of farmers and to identify the factors in determining how decisions in rice farming in village Kebonpedes,Sukabumi. Research carried out by comparing the SRI and conventional methods. SRI method showed that the amount of the costs needed for the production of rice per hectare in one growing season is Rp 9.854.311,34 for land lord and Rp 15.354.311,34 for the rent with dry grain harvest may reached at 7.531 Kg/Ha and a selling price Rp 3.400 per-kilogram. Conventional method showed that the amount of the costs needed for the production of rice per hectare in one growing season is Rp 9.808.711,14 for land vi lord and Rp 15.308.711,14 for the rent with dry grain harvest may reached at 5.448 Kg/Ha and a selling price Rp 3.000 per kilogram. Several factors that support conventional farmers at Kebonpedes village to didn’t move on are habit, type of farming, and land status.
Keyword: method, income, factors, farming, cost

Judul: Peluang Partikel Plasma Berada Pada Dimensi Debye Akibat Gangguan Gelombang Elektromagnetik dengan Menggunakan Persamaan Schrödinger
Abstrak: The solution of Schrodinger equations with plasma Coulomb potential in spherical coordinat results solution wave function and energy plasma particle. Electron probability density at Debye length with thermal effect same as ion, which indicates plasma in neutral state. Electromagnetic waves perturbation of an electric field given to result wave function perturbation system. The probability density of plasma particle due to electromagnetic waves perturbation is the largest when an electromagnetic waves frequency 1.41 times the plasma frequency .
Keyword: Schrödinger, plasma, electromagnetic wave