Judul: Studi Penerapan Rotasi Tanaman Padi dan Palawija dengan Pemupukan Organik di Kabupaten Blora, Jawa Tengah
Abstrak: The use of chemical fertilizer since several decades ago potentially reduce soil fertility and crop yield. Organic farming system can be applied to solve this problem through the use of a variety of organic fertilizers. Organic fertilizer application is useful because it is capable to improve the physical, biological, and chemical soil fertility and produce safe-consumed food and safe for environment. Only a few number of farmers in Blora, Central Java use organic fertilizer as the source of plant nutrient because it is considered less efficient in terms of the amount of which is given. Most of the farmers in Blora apply rice-corn cropping pattern every year. Crop rotation is highly recommended to be applied to break down life chain cycle of the pest and to improve the soil fertility. The study consisted of organic rice experiment in the first cropping season (January-April 2012) and organic soybean and corn experiment in the second one (May-September 2012). The organic fertilizers were used in the study tailored to the types of organic fertilizer which available in the experiment site. Organic fertilizer application in the second cropping season resulted in the higher nutrient content of available-P and Ca, and better plant growth and yield than those with organic fertilizer application in the first one. Nutrient immobilization was predicted still occured during the first cropping season, so that resulted in the lower nutrient content and plant performance than those in the second one. This research was not fully meet the criteria of organic farming especially for the experiment site requirements, but it was an initiation to meet the qualification of organic farming system. The organic rice experiment in the first cropping season showed that the application of cow manure did not significantly increase the rice yield, but there was a trend that the application of 10 tons cow manure ha-1 with square spacing 20 cm x 20 cm or application of 3 tons corn biomass ha-1 + 7.5 tons cow manure ha-1 with double-row spacing 40 cm x 25 cm x 15 cm resulted in the higher rice yield than with other treatments. The organic soybean experiment in the second cropping season showed that the application of 7.5 tons of cow manure or application of 7.5 tons sheep manure ha-1 were more efficient in producing organic soybean seed than other treatments. After organic rice cultivation in the first cropping season, the organic corn experiment in the second one showed that the application of 11.25 tons cow manure ha-1 or application of 11.25 tons sheep manure ha-1 were more efficient in producing organic corn seed than other treatments. Based on the yield and the value of R/C ratio, organic rice-soybean cropping pattern was more profitable than organic rice-corn cropping pattern.
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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: 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