Judul: Efektivias Pupuk Organik Komersial Terhadap Perbaikan Sifat Kimia Tanah dan Produktivitas Tanaman Padi Pada Tanah Cangkurawok Bogor
Abstrak: The addition of organic matter can be provide a positive effect on soil chemical, physical, and biological properties. This research was aimed to (1) learn the effect using of organic fertilizers to growth and production of rice, (2) learn the effects of organic fertilizer on several chemical soil properties, and (3) obtain optimum dosage based on farming analysis of rice in Cangkurawok, Bogor. The treatments provided in this research include: control, goat manure 5000 kg/ha and commercial organic fertilizer dose of 250, 500, 750, 1,000, 2,000, 3,000, and 5,000 kg/ha. Components observed were consisted of vegetative and generative growths, production, and chemical soil properties. The results indicated that addition of organic manure and commercial fertilizer have no significant effect on the growth of rice plants. On the contray,the treatments have significant effect on rice production. Commercial organic fertilizer provides increased production higher than manure. In general, organic fertilizer treatments did not significantly affect the chemical soil properties, except for pH and P-Bray I, which are significantly increased, and the P-HCl which is significantly decreased. Farming analysis indicates that 500 kg/ha commercial organic fertilizer treatment is the optimum dosage (R/C of 2.02).
Keyword: Bogor Agricultural University (IPB), Rice, Manure, Commercial Organic Fertilizer, Organic materials

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: Karakteristik Anatomi Skelet Kepala Buaya senyulong (Tomistoma schlegelii).
Abstrak: Buaya sepit atau senyulong (Tomistoma schlegelii) merupakan jenis buaya asli Indonesia yang berhabitat di sungai-sungai Sumatera, Kalimantan, dan juga pedalaman Sulawesi. Salah satu ciri khas buaya senyulong adalah bentuk moncong yang runcing dan sempit, namun hingga saat ini informasi mengenai struktur skelet kepala buaya senyulong sangat terbatas. Penelitian ini bertujuan untuk mempelajari karakteristik anatomi skelet kepala buaya senyulong yang dikatikan dengan fungsi dan perilakunya. Penelitian dilakukan secara eksploratif dengan melakukan pengamatan, pencatatan, dan pengambilan gambar dari skelet kepala buaya senyulong. Skelet kepala berukuran panjang 70 cm, lebar 29 cm, dan tingggi 17 cm dengan permukaan kasar pada os nasale, os frontale, os maxilla, os mandibula, os lacrimale, os jugale. Jumlah gigi pada buaya ini sebanyak 78 buah, terdiri dari 4 buah gigi premaxila, 16 buah gigi maxila, dan 19 buah gigi mandibula. Pada regio orbitalis ditemukan dua pasang fenestrae temporales yang berkembang baik. Fenestra supratemporale merupakan lubang oval yang membentang di sepanjang os parietale. Fenestra infratemporale berbentuk segitiga dan dibatasi oleh os squamosum, os postorbitale, os jugulare, dan os quadratum. Os mandibula hewan ini mempunyai symphysis mandibularis yang panjang yaitu garis yang melintang di corpus mandibulae. Secara fungsional ukuran symphysis mandibularis berkaitan dengan adaptasi hewan terhadap diet makan.
Keyword: kepala, moncong, Tomistoma schlegelii