Judul: Feasibility Study of Agroforestry in Karacak Village,  Leuwiliang District, Bogor Regency
Abstrak: MOCHAMAD ALDI YUSUF. Feasibility Study of Agroforestry in Karacak Village, Leuwiliang District, Bogor Regency. Supervised by DODIK RIDHO NURROCHMAT. The agroforestry pattern in mixed gardens in Karacak Village is very important for the farmers’ livelihood. This study aims to determine the contribution of agroforestry community forest to farmers' income and analyze the feasibility of agroforestry community forest business in Karacak Village. This study's primary data collection was conducted by interviewing the head or members of the farmer's household and field observations using purposive sampling technique on farmers who have community forest businesses based on their land area. The NPV, BCR, and IRR values are used to determine the feasibility of business in community forests at Strata I, II, and III. The results showed three strata of agroforestry community forest land area, namely Strata I having a land area of <0.51 ha, Strata II having a land area of 0.51– 0.74 ha, and Strata III having a land area of >0.74 ha. The managed community forest is a combination of mangosteen (Garcinia mangostana L), durian (Durio), Albizia/sengon (Paraserianthes falcataria), African wood (Maesopsis eminii Engl). The contribution of community forest income is 31% in Strata I, 18% in Strata II, and 57% in Strata III. The amounts of NPV for Strata I, II, and III were Rp 26,312,489, Rp 11,473,644, and Rp 86,609,451, respectively. BCR values for Strata I, II, and III are 2.12 each; 1.38; and 2.36. IRR values for Strata I, II, and III are 38%; 22%; and 36%.
Keyword: agroforestry, business feasibility, community forest, contribution

Judul: Peran usaha hutan rakyat dalam perekonomian rumah tangga di Desa Legokhuni, Kecamatan Wanayasa, Kabupaten Purwakarta, Propinsi Jawa Barat
Abstrak: One alternative to overcome the pressure on forest resources and to fulfil community needs for wood, water, environment and other various products is community forests development. Community forests in Java generally aplly agroforestry systems. Timber from community forests has been developed into a commodity that has high economic value and can provide additional revenue for community. This study aims to analyze the influence of agroforestry community forests to the economy of the household, identify the correlation effectiveness of community forest are to income and identify the feasibility of community forest in the Legokhuni. The research was conducted in the Legokhuni, Wanayasa Sub District, Purwakarta District, West Java it used interviews and field observation with purposive sampling method to households who have community forest based on land area. The data which used in this study, are the average farmers household income from community forest, the average of farmers households total income and the contribution of community forests. Then NPV (Net Pressent Value), BCR (Benefit Cost Ratio) and IRR (Internal Rate of Return) were used to determine the feasibility of community forests in strata I, II and III. The results of this study show that there are three stratum of forest strata I with land area <0.42 ha, strata II with a land area of 0.42 to 0.902 ha and strata III with land area> 0.902 ha. The number of respondents for strata I, II and III 16, 10 and 6 respondents. Public forests which developed in the village Legokhuni are combination of tea plant (Camellia sinensis), sengon (Parasienthes falcataria), Mindi (Melia azedarach) and Mahoni (Swietenia spp.) The contributions of community forest is to total farmers income are 17.90% in strata I; 30.69% in strata II and 43.03% in strata III. NPV (Net Present Value) for strata I, II and III are Rp. 9764510.00; Rp. 16,090,810.00 and Rp. 11,514,450.00. BCR (Benefit Cost Ratio) for strata I, II and III, are 1.39, 1.30 and 1.08. IRR (Internal Rate Ratio) for strata I, II and III are 28.56%, 32.23% and 26.76%.
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Judul: Formulasi Hamiltonian untuk Menggambarkan Gerak Gelombang Soliter Dimensi Tiga di Permukaan Laut
Abstrak: Gelombang permukaan adalah gelombang yang terjadi perbedaan rapat massa antara air dan udara. Salah satu gelombang permukaan yang ditinjau adalah gelombang soliter. Formulasi gelombang soliter dilakukan dengan menggunakan formulasi Hamiltonian.
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