Judul: Karakteristik Fisik Tanah pada Beberapa Penggunaan Lahan di Tanah Latosol Darmaga dan Podsolik Jasinga
Abstrak: Increasing need of agriculture land each year result in the increasing of forest land conversion. Conversion of forest land to agriculture land may lead to decrease in the physical quality of the land. A research aimed to compare the difference of soil physical properties under secondary forest, mixed farms, and annual crop was conductied on two soil types i.e. Latosol Darmaga and Podsolik Jasinga. Methods used in this research were suited to the analyzed parameters. The result shows that soil under mixed farm and annual crop tend to have higher bulk density, lower total porosity, lower water availability, lower permeability, lower water field content, and higher penetrability than soil under secondary forest both in latosol Darmaga or podsolik Jasinga. The result also shows that the difference physical quality between soil under forest and soil under mixed farm and annual crop in podsolik Jasinga is higher than those in latosol Darmaga. Latosol contain higher polyvalent cations than podsolik so that it has better aggregate consilidation and more stable soil structure. This suggests that Podsolik Jasinga is more susceptible than latosol.
Keyword: Podsolik, soil physical properties, Latosol

Judul: Kemampuan Resapan Air Tanah pada Berbagai Penggunaan Lahan di Latosol Darmaga dan Andosol Cisarua
Abstrak: Forest is a natural ecosystem that has good soil properties. Land use change from forest to agricultural land led to degradate soil quality. The degradation of soil quality would be different for different soil type. The study aimed to compare infiltration capacity, the amount of organic litter, macrofauna and soil organic matter content in perennial mixed farm, annual dryland and forest on Latosol and Andosol. The results showed that the amount of organic litter, organic matter content, macrofauna and infiltration capacity of agricultural land are smaller than those of forest. Those characteristics are poorest on annual dryland. The largest difference occurs in annual dryland at Andosol for the amount of litter, soil organic matter content, macrofauna and infiltration capacity. This indicate that land use change may cause greater soil quality degradation in Andosol than Latosol.
Keyword: soil organic matter, soil macrofauna, litter, infiltration capacity

Judul: Infeksin virus rota pada anak babi
Abstrak: Virus Rota sudah lama diduga sebagai salah satu penyebab diare pada anak babi yang baru dilahirkan. Hal ini diperkuat dengan berhasilnya Mebus dan kawan-kawan mengidentifikasi virus Rota pada kejadian diare yang ter jadi pada anak sapi yang baru dilahirkan. Infeksi virus Rota merupakan hal yang serius, kejadian yang mewabah pernah dilaporkan di Amerika Serikat, Inggris, Kanada dan Australia. Sedangkan kejadian di Indonesia yang dihubungkan dengan infeksi virus Rota belum dilaporkan. Virus Rota termasuk keluarga Reo viridea. Sesuai dengan namanya, virus Rota menyerupai roda (Rota = Wheel), mengandung asam nukleat (nucleid acid) yang berupa asam nukleat ribo (ribo nucleid acid, RNA) dan berserabut ganda (double stranded), tidak mempunyai selubung (envelop atau peplos). Hewan rentan adalah hewan yang berumur sangat muda. Selain menyerang babi, dapat pula menyerang sapi, domba, rusa, anjing, kucing, tikus, kelinci, unggas dan manusia. ...
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