Judul: Pengaruh pemberian cendawan mikoriza arbuskula (cma) dan dosis pupuk kandang ayam terhadap pertumbuhan dan produksi jagung (zea mays l.)
Abstrak: The application of VAM and chicken manure dose was investigated toward growth and production of maize using splitplot design by complete randomized design methode. The first factor as the main plot is VAM (without VAM and with VAM) and the second factor as subplot is the dose of chicken manure (0, 5, 10, 15, and 20 tons/ha). Doses of chiken manure 0 ton/ha was used to determine 100 % inorganic fertilizer and the other dose of chicken manure was used to determine 50 % of inorganic fertilizer. Statistically, the application of the VAM did not provide significant effect on the growth and yield of maize. However, at 9 weeks after planting, the use of VAM provide more high-than plant height without the use of VAM. In several treatment with VAM showed growth and higher production than without VAM. Application doses of chicken manure showed a significant effect on the growth and yield of corn. Doses of chicken manure give a linear response of plant height at 9 week after planting and corn grains.
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Judul: Effects of Urea Fertilizer Dosage and Varieties on Growth and Yield of Maize (Zea mays L.)
Abstrak: Jagung adalah komoditas penting di Indonesia yang permintaannya terus meningkat sehingga produktivitasnya perlu ditingkatkan dengan penggunaan benih bermutu dan pemupukan berimbang. Penelitian bertujuan mengetahui pengaruh dosis pupuk Urea dan varietas terhadap pertumbuhan dan produksi jagung. Penelitian dilaksanakan menggunakan rancangan petak terbagi dalam rancangan kelompok lengkap teracak. Perlakuan terdiri dari 2 faktor yaitu varietas dan dosis pupuk Urea. Varietas sebagai petak utama terdiri dari varietas Bisma dan Pioneer 27. Dosis pupuk Urea sebagai anak petak terdiri dari dosis 0, 150, 300, 450, dan 600 kg ha-1. Penelitian menunjukkan dosis pupuk Urea berpengaruh nyata terhadap pertumbuhan dan produksi jagung. Peningkatan dosis pupuk Urea sampai 600 kg ha-1 secara linear nyata meningkatkan bobot kering biomassa, bobot tongkol berkelobot, bobot tongkol, diameter tongkol, bobot biji per tongkol, dan produktivitas. Tinggi tanaman, jumlah daun, dan panjang tongkol menunjukkan respon kuadratik terhadap dosis pupuk Urea dengan rata-rata dosis optimum adalah 417,30 kg ha-1. Terdapat korelasi positif nyata antara peubah tinggi tanaman, jumlah daun, panjang tongkol, dan produktivitas sehingga aplikasi pupuk Urea dengan dosis 450 kg ha-1 adalah yang paling mendekati optimum dan dapat direkomendasikan untuk kedua varietas. Aplikasi pupuk Urea dengan dosis 600 kg ha-1 atau lebih dapat dimanfaatkan untuk produksi jagung untuk pakan ternak., Maize is an important commodity in Indonesia whose demand continues to increase so that its productivity needs to be increased by using quality seeds and balanced fertilization. This study investigates the effect of Urea fertilizer dosage and varieties on the growth and production of maize. The experiment used a split-plot design in a completely randomized group design. The treatment consisted of 2 factors, variety and dose of Urea fertilizer. Varieties as the main plot consisted of Bisma and Pioneer 27. The doses of Urea fertilizer as sub-plots consisted of doses of 0, 150, 300, 450, and 600 kg ha-1. The results showed that the dose of Urea fertilizer had a significant effect on the growth and yield of maize. Increasing the dose of Urea fertilizer up to 600 kg ha-1 linearly significantly increased biomass dry matter, ear weight with husk, ear weight, ear diameter, seed weight per ear, and yield. Plant height, number of leaves, and ear length showed a quadratic response to the dose of Urea fertilizer with an average optimum dose of 417,30 kg ha-1. There is a significant positive correlation between the variables of plant height, number of leaves, ear length, and yield so that the application of Urea fertilizer at a dose of 450 kg ha-1 is the closest to the optimum and could be recommended for both varieties. Urea fertilizer application with a dose of 600 kg ha-1 or more can be used for maize production for animal feed.
Keyword: Bisma, dosis optimum, pakan ternak, Pioneer 27, produksi, animal feed, optimum dose, yield

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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