Judul: Miko-seedcookies® Effectivity on Improving the Growth and Production of Sorghum Samurai 2 (Sorghum Bicolor L. Moench) in the Post Mining Land of Limestone
Abstrak: MOHAMMAD DISAM ALFAIN. Efektivitas Miko-seedcookies® dalam Meningkatkan Pertumbuhan dan Produksi Sorgum Samurai 2 (Sorghum bicolor L. Moench) di Lahan Pascatambang Kapur. Dibimbing oleh PANCA DEWI MANU HARA KARTI dan IWAN PRIHANTORO. Tujuan penelitian adalah untuk mengevaluasi efektivitas Miko-seedcookies® dalam meningkatkan pertumbuhan dan produksi Sorghum Samurai 2 (Sorghum bicolor L. Moench) di lahan pascatambang kapur. Penelitian menggunakan rancangan acak kelompok (RAK) yang terdiri dari empat perlakuan berdasarkan dosis Miko-seedcookies® dan tiga kelompok. Data dianalisis menggunakan analisis ragam (ANOVA), jika ditemukan perbedaan yang signifikan (P<0,05), dilakukan uji lanjut Duncan. Parameter yang diamati meliputi kolonisasi fungi mikoriza arbuskula, daya tumbuh, jumlah daun, tinggi tanaman, diameter batang, umur berbunga, produksi biomassa segar dan kering, rasio batang dan daun, dan brix. Hasil penelitian menunjukkan bahwa peningkatan dosis Miko-seedcookies® sangat efektif untuk meningkatkan pertumbuhan dan produksi Sorgum Samurai 2 di lahan pascatambang kapur. Dosis Miko-seedcookies® 53 gram per titik tanam adalah yang terbaik. Kata kunci: fungi mikoriza arbuskula, Miko-seedcookies®, pertumbuhan, produksi, sorgum, MOHAMMAD DISAM ALFAIN. Miko-seedcookies® Effectivity on Improving the Growth and Production of Sorghum Samurai 2 (Sorghum Bicolor L. Moench) in the Post Mining Land of Limestone. Supervised by PANCA DEWI MANU HARA KARTI and IWAN PRIHANTORO. The objective this research was to evaluate Miko-seedcookies® effectivity on improving the growth and production of Sorghum Samurai 2 (Sorghum bicolor L. Moench) in the post mining land of limestone. The study used a randomized block design (RBD) consisting of four treatments based on Miko-seedcookies® dosage and three blocks. The data were analyzed using analysis of variance (ANOVA), if significant differences were found (P<0.05), Duncan's post hoc test was conducted. The parameters observed were arbuscular mycorrhizal fungi colonization, germination rate, leaf number, plant height, stem diameter, flowering age, fresh and dry biomass production, stem and leaf ratio, and brix. The results showed that enhancement the dose of Miko-seedcookies® is very effective in increasing the growth and production of Sorghum Samurai 2 in the post mining land of limestone. Miko-seedcookies® dosage of 53 grams per planting point is the best. Keywords: arbuscular mycorrhizal fungi, growth, Miko-seedcookies®, production, sorghum
Keyword: arbuscular mycorrhizal fungi, growth, Miko-seedcookies®, production, sorghum

Judul: Effect of Harvest Ages on Production, Seeds Quality, Biomass of Sorghum of Varieties of Samurai 2
Abstrak: Tujuan dari penelitian ini adalah mengevaluasi produksi, kualitas benih, dan biomassa tanaman sorgum berdasarkan umur panen yang berbeda. Penelitian ini menggunakan tanaman sorgum varietas samurai 2 dan didesain menggunakan rancangan acak kelompok (RAK) dengan 4 perlakuan dan 5 ulangan. Data penelitian dianalisis menggunakan ANOVA, apabila berbeda nyata, dilakukan uji lanjut menggunakan uji Duncan Multiple Range Test (DMRT). Perlakuan umur panen tanaman sorgum terdiri dari 95 HST (U1), 100 HST (U2), 105 HST (U3), dan 110 HST (U4). Peubah yang diukur pada penelitian ini adalah kadar air benih, panjang malai, berat malai, berat kering malai, berat benih pipil, berat kering benih pipil, berat 1000 benih, dan viabilitas benih. Hasil penelitian menunjukkan perlakuan umur panen tanaman sorgum 105 HST signifikan meningkatkan berat benih dan berat 1000 benih. Perlakuan umur panen 105 HST juga signifikan meningkatkan viabilitas benih dan hasil terbaik pada hari ke 4 dan 7, serta biomassa produksi tertinggi., The aim of this study was to evaluate the production, seeds quality, and biomass of sorghum varieties of samurai 2 at harvest ages. This study used sorghum varieties of samurai 2 and designed a Randomized Block Design (RDB) with 4 treatments and 5 replication. The data were analyzed using ANOVA and any significant differences were further tested using Duncan Multiple Range Test (DMRT). Sorghum was harvested at the age of 95 DAH (U1), 100 DAH (U2), 105 DAH (U3), and 110 DAH (U4). The measured variable were moisture content of seed, panicle length, panicle weight, panicle dry weight, weight of pipil seed, dry weight of pipil seed, weight of 1000 seeds, and viability of seed. The results showed that the treatment of sorghum at 105 DAH significantyly increased weight of seed and weight of 1000 seeds. Furthermore, the treatment of sorghum at 105 DAH significantly increased viability of seed and get the best value of day-4 and day-7, and highest of biomassa production.
Keyword: harvest age, panicle, seed, sorghum, viability

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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