Judul: Optimalisasi Respon Ganda Pada Metode Permukaan Respon (Response Surface) Dengan Pendekatan Fungsi Desirability (Studi Kasus Mencari Dosis Pupuk Yang Optimal Pada Padi IR64)
Abstrak: Fertilization technology by using inorganic substance is an effort in improving productivity of rice. Giving nitrogen fertilizer, phosphor and potassium in IR64 (type of rice) is expected can improve productivity and optimal nutrition absorption. Desirability function is a method for combining single response, nutrition absorption and productivity component, become multi response. That response has limit value which must be fulfilled. Then, created multi response is optimized together by using response surface methodology. In the dry season, the optimal fertilizer dose of multi response is nitrogen fertilizer at 140 kg/ha, phosphor at 21,54 kg/ha and potassium at 100 kg/ha. In this dose will be gotten the average optimal response with malai in the number of 298,75 malai/m2, 91,27 % of brown rice, productivity at 6267,57 kg/ha, nitrogen absorption at 21,83 kg/ha, phosphor absorption at 3,57 kg/ha and potassium absorption at 17,98 kg/ha. In the wet season, the optimal fertilizer dose of multi response is nitrogen fertilizer at 40 kilograms per hectares, phosphor 25 kg/ha, potassium at 0 kg/ha. In this dose will be gotten the average optimal response with malai in the number of 279,88 malai/m2, 83,98 % of brown rice, productivity at 5703,88 kg/ha, nitrogen absorption at 22,59 kg/ha, phosphor absorption 4,04 kg/ha and potassium absorption 11,80 kg/ha.
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Judul: Optimasi Dosis Pupuk Organik yang Diaplikasikan dengan Pupuk Hayati pada Budidaya Padi Organik
Abstrak: The research was conducted at Cibungur, Karawang Wetan, Karawang. Soil analysis carried out at the soil Laboratory, Department of Soil Science and Land Resources, agriculture faculty of IPB. The research was conducted from December 2012 to March 2013. The research design used was Randomized Plots Divided (Split Plot Randomized Block design). This research using a factorial design with two factors, namely bio-fertilizers and organic fertilizers. Data analysis using analysis of variance (F test), if real then by DMRT (Duncan Multiple Range Test) at the level of 5%. Treatment consisted of two biological fertilizer levels that is 2 l ha-1 application-1 and 0 l aplikasi-1 ha-1. Treatment of solid organic fertilizer consist of six levels, namely: 0 ton ha-1, 2 ton ha-1, 4 ton ha-1, 6 ton ha-1, 8 ton ha-1, and 10 ton ha-1 . The purpose of this study was to determine the effect of a combination of organic fertilizer with bio-fertilizers on organic rice farming. Applications POP 10 ton ha-1 resulted height plant, biomass plant, 1000 grain weight, GKP and GKG highest to all treatments. Application POP 8 and 10 ton ha-1 combined with bio-fertilizers can increase the yield of 6 and 10% grain yield, while treatment 2-6 ton ha-1 dont improve outcomes compared with control. POP dose 8-10 ton ha-1 increase grain yield around 10%.
Keyword: organic rice, organic fertilizers, bio-fertilizers

Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
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