Judul: Two Soybean Varieties Production with The Application Organic Manure with Same Dosage as in Planting Season I under Organic Farming System
Abstrak: Penelitian ini dilakukan untuk mengetahui pengaruh residu pupuk organik terhadap kedelai varietas Wilis dan Anjasmoro pada musim tanam II yang dibudidayakan secara organik. Penelitian dilaksanakan di Kebun Percobaan IPB Cikarawang, Laboratorium Produksi Tanaman Departemen Agronomi dan Horikultura, serta Laboratorium Kimia Tanah, Departemen Ilmu Tanah dan Sumberdaya Lahan, Faperta, IPB pada bulan Oktober 2010 sampai Februari 2011. Rancangan yang digunakan dalam penelitian ini adalah Rancangan Petak Terbagi (Split Plot Design) dua faktor, yaitu pupuk organik dan varietas. Pupuk oganik digunakan sebagai petak utama dan varietas sebagai anak petak. Petak utama terdiri atas tiga jenis perlakuan pupuk organik yaitu 20 ton pupuk kandang ayam/ha, 10 ton pupuk kandang ayam/ha dengan penambahan 3.5 ton Centrosema pubescens/ha dan 10 ton pupuk kandang ayam/ha dengan penambahan 3.5 ton Tithonia diversifolia/ha. Anak petak terdiri atas dua jenis varietas yaitu Anjasmoro dan Wilis. Hasil penelitian ini menunjukkan bahwa perlakuan pupuk organik hanya berpengaruh nyata terhadap kadar Fe biji sedangkan pada komponen pertumbuhan dan produksi lainnya, pupuk organik berpengaruh tidak nyata. Varietas berbeda nyata pada tinggi tanaman umur 2, 3, 5, 6, dan 7 MST, bobot basah dan kering tajuk dan daun 7 MST, jumlah polong isi, jumlah cabang produktif, jumlah buku produktif, bobot 100 biji, kadar Fe dan Zn biji, berbeda sangat nyata pada bobot kering akar 7 MST. Interaksi antara pupuk organik dan varietas hanya berpengaruh nyata terhadap kadar Fe biji. Potensi produksi kedelai dengan pemberian 20 ton pupuk kandang/ha, 10 ton pupuk kandang/ha ditambah 3.5 ton Centrosema pubescens/ha dan 10 ton pupuk kandang ayam/ha ditambah 3.5 ton Tithonia diversifolia/ha berturut-turut adalah 2.43 ton/ha, 2.43 ton/ha, dan 2.26 ton/ha. Potensi produksi kedelai varietas Wilis dan Anjasmoro berturut-turut adalah 2.28 ton/ha dan 2.46 ton/ha.
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Judul: Residu pupuk organik mendukung produksi dua varietas kedelai organik (Glycine max (l) merr) di lahan kering
Abstrak: The experiments were conducted at IPB Research Station in Cikarawang, Darmaga,Bogor, from October 2010 to February 2011. The study was conducted to investigate the effect of residues of different organic manures on the production of soybean with 50% dosage in previous experiments. The manure rates were 10 ton chicken manure/ha, 1.75 ton Centrosema pubescens/ha and 1.75 ton Tithonia diversifolia/ha. All treatments were added with 5 ton chicken manure/ha, 1 ton rice husk charcoal/ha and 1 ton dolomite/ha. The experiment used two varieties of soybeans, i.e Anjasmoro and Wilis. This research used Split Plot design with three replication, the organic manure as the main plot and the soybeans varieties as the sub plot. The effect of three organic manure residues were significantly different in number of branch, number of nodule, and filled pod. Organic manure did not significantly affect in productivity of soybeans. The productivity of soybeans with chicken manure, Centrosema pubescens and Tithonia diversifolia were 2.13,1.99 and 2.07 ton/ha. Productivity in the second season was higher than that of first season, it incrased about 83.96%. Varieties were significantly different in filled pod number, 100 seeds weight. The productivity of Anjasmoro was higher than Wilis, they were 2.13 and 1.94 ton/ha, respectively.
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Judul: Kekonsistenan Hamiltonian pada Gerak Gelombang Interfacial
Abstrak: The interfacial wave is an internal wave that occurs at boundary of two layers fluid. It appears because there is difference of mass density between the two layers. The objective of this thesis is to formulate the motion of internal wave with flat base and flat as well as free upper bound surface. The motion equation obtained is a Hamiltonian system. The Hamiltonian in this system is expressed by variable of wave deviation and horizontal component of potential velocity. Under assumption that interfacial wave moves only in one direction, it can be shown that the Hamiltonian depends on the solution of the wave motion equation. The coefficients of the equation depend on the physical characteristics of the two layers of fluid, i.e. thickness and mass density. The numerical results show that Hamiltonian in the system is constant. It is consistent with Hamiltonian characteristic, which does not depend on time.
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