Judul: Pengaruh Taraf Pupuk Organik Yang Diperkaya Terhadap Pertumbuhan Jagung Manis (Zea Mays Saccharata Sturt) Dan Sifat Kimia Tanah Pada Latosol Di Darmaga
Abstrak: The negative impact caused by the use of inorganic fertilizers pushes fanner to return to organic fanning system. However, because the decomposition process of organic fertilizers is slow and its amount is limited, the nutrition which can be absorbed by crop for its h'fO,,,,th is a little. Therefore, it is needed to combine organic fertilizers with inorganic fertilizers. The objective of this research was to evaluate the effectiveness at 6 levels of enriched organic fertilizer levels on the yield and the chemical of soil properties. This research was carried out in the experimental field of Cikabayan, Bogor. The plant analysis was done in the Laboratory of Chemistry and Soil Fertility, Soil Sciences Department, Faculty of Agriculture, Bogor Agricultural University. The study was conducted from March until September 2003. The treatnients consisted of 6 levels of enriched organic fertilizers: PO (dosage: 0 ton/hal; PI (dosage: 10 ton/hal; P2 (dosage: 20 ton/hal; P3 (dosage: 30 ton/hal; P4 (dosage: 40 ton/hal; and P5 (dosage: 50 ton/hal, with 4 replications. So, there were 24 treatments unit in this research. These fertilizers were consisted of organic fertilizers - 60 % of compost and 25 % of cow dung - combined with these inorganic fertilizers - 7 % of dolomite, 2 % of urea, 4 % of SP-36, and 2 % ofKe! The result of this research indicated that the enriched organic fertilizers treatments have an effect to improvement of measured parameters value. The best of yield, high of plant, and the chemical of soil properties were obtained at treatment of P5 with dosage 50 tonlha of enriched organic fertilizers. The worst of yield, high of plant, and the chemical of soil properties were occurred at treatment of PO (without enriched organic fertilizers).
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Judul: Pengaruh Taraf Pupuk Organik Yang Diperkaya Terhadap Pertumbuhan, Produksi, Kandungan Hara N, P, K Tanaman Jagung Manis (Zea Mays Saccharata Sturt), Dan Nilai Kritisnya Pada Latosol Darmaga
Abstrak: Dampak negatif yang disebabkan oleh penggunaan pupuk anorganik menclorong petani untuk kcmbali ke sistem pertanian organik (organic farming system). Namun, karena proses clekomposisi pupuk organik yang lambat dan jumlahnya yang terbatas menyebabkan hara yang dapat diserap oleh tanaman untuk pcrtumbuhannya juga menjacli seclikit. Oleh karena itu, cliperlukan kombinasi antara pupuk organik clengan pupuk anorganik. Tujuan penelitian ini aclalah untuk menguji efektivitas taraf pupuk organik yang cliperkaya terhaclap pertumbuhan, procluksi, kanclungan hara N, P, K tanaman clan nilai kritisnya pacla tanaman jagung manis pacla Latasol Oarmaga. Penelitian ini clilakukan di Kebun Percobaan Cikabayan, Bogor. Analisis tanamandilakukan di Laboratorium Kimia dan Kesuburan Tanah, Departemen Tanah, Fakultas Pcrtanian, Institut Pertanian Bogor. Penelitian berlangsung mulai bulan Maret sampai bulan September 2003.
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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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