Judul: Pengaruh Dosis Pupuk Kandang dan Arang Sekam Terhadap Pertumbuhan Tanaman Garut (Maranta arundinacea L.) Di Bawah Naungan Tegakan Sengon [Paraserianthes falcataria (L.) Nielsen]
Abstrak: Garut (Maranta arundinacea L.) was proposed by government as one of food comodities which take priority to be developed and cultivated because it potential as a wheat flour substitute, which is containing alternative sources of carbohydrate. Garut not only used for food, but also for industrial raw materials. Therefor, research about growth of garut plant with different manure doses under shade of P. falcataria stands has been done with the measured parameters are high stems, plant height, diameter, and number of leaves of garut. The design of this experiment using Completely Random Design (CRD) with two factorials. Doses of manure used are 0 gram, 200 gram, 400 gram and 600 gram, and also with the addition of charcoal husk with a 1:1 ratio with the soil. From the results indicate that interaction between manure doses and charcoal husk didn’t give real effect for high stem, diameter, and number of leaves of garut plant, and only gives real impact for plant height. On the parameter number of leaves, although the interaction between manure doses and charcoal husk doesn’t give real effect, but manure doses gives real effect for the number of leaves. Duncan test result showed that 600 gram dose of manure gave a significantly different effect for the number of garut leaves.
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Judul: Pengaruh Bahan Tanam dan Waktu Pemupukan Pupuk Kandang terhadap Pertumbuhan Garut (Maranta arundinaceae L.)
Abstrak: Tanaman garut (Maranta arundinaceae L.) merupakan tanaman umbi-umbian yang digolongkan dalam famili Marantaceae dan dikelompokkan pada umbi-umbian minor. Peningkatan produktivitas garut dapat dilakukan melalui pemupukan dan penggunaan bahan tanam. Penelitian ini bertujuan mempelajari pengaruh bahan tanam dan pemberian pupuk kandang sapi, serta interaksinya terhadap pertumbuhan dan produktivitas tanaman garut. Penelitian dilaksanakan di Kebun Percobaan Cikabayan IPB, Dramaga, Bogor dari bulan Februari hingga Agustus 2019. Percobaan pertama menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) dengan faktor tunggal, pengaruh bahan tanam. Bahan tanam bagian tengah umbi menghasilkan rataan jumlah stek bertunas dan jumlah tunas per stek tertinggi. Percobaan kedua menggunakan Rancangan Split Plot dengan petak utama waktu pemupukan dan anak petak perlakuan bahan tanam. Perlakuan waktu pemupukan tidak mempengaruhi peubah yang diamati. Perlakuan bagian umbi sebagai bahan tanam memberikan pengaruh pada tinggi anakan, dan jumlah anakan saat 12 dan 20 MST, kehijauan daun tanaman induk dan anakan serta bobot kering brangkasan, bobot segar brangkasan tanaman garut.
Keyword: produktivitas, sumber karbohidrat, pupuk kandang, bibit

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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