Judul: Pengaruh Pemberian Mulsa Jerami Jagung dan Kepadatan Tanah terhadap Pertumbuhan dan Produksi Jagung (Zea mays)
Abstrak: Intensive land cultivation can damage soil structure and further enable soil to be compact, and reduce water availability in the soil. Mulch application to cover the soil surface will reduce evaporation rate and increase availability of water in the soil. The research was aimed to study the effect of corn straw mulching and soil density application on physical characteristics of the soil, to determining soil bulk density and dose of mulch which is most suitable for corn growth and production of corn. The experiment was designed using a completely randomized factorial design. The first factor is the density of soil which is consist of soil bulk density 0.8, 1.0, dan 1.2 g/cm3 (K1, K2, dan K3). The second factor was corn straw mulch application which was divided into three doses i.e. 0%, 30%, 60%, and 90% (M0, M1, M2, and M3). Data were analyzed using analysis of variance (ANOVA) and further testing using Tukey Test at the level of 5%. The results of the research show the interaction of soil compaction with mulch were significantly affect on plant height at age 11-14 weeks after growing, the number of leaves at the age of 10, 11, 12, and 14 weeks after growing, dry weight of corncob both with and without husk, and dry weight of seed.The increasing of soil compaction were significantly affect on field capacity, soil resistance before planting, both total and reproductive phase evapotranspiration in single growing season, weight of roots, plant biomass, plant growth and production, also soil physics characteristic after harvest. Mulch application significantly affect on evapotranspiration of vegetative phase, plant height at 8-14 weeks after growing, stem diameter at 10 weeks after growing, and production except dry weight of seed. Soil bulk density and mulch cover suitable for the growth and production of corn is 0.8 g/cm3 and 90%.
Keyword: soil compaction, mulch, field capacity, corn growth and production

Judul: Pengaruh Pemberian Mulsa Jerami Padi dan Kepadatan Tanah terhadap Pertumbuhan dan Produksi Padi Gogo (Oryza sativa L.)
Abstrak: Food security issues are strongly associated to the availability of food and land that affecting plant growth and production. Intensive tillage in conventional farming systems results poor soil condition (low fertility and soil physics characteristic, especially soil compaction) that fail to support plant growth. Soil compaction improvement is one of management effort on soil physics properties to obtain more suited physical environment for plant growth especially paddy. This research was aimed to study the effect of rice straw application and soil compaction on soil physics characteristic and to determine the soil bulk density and dose of mulch that effective for paddy growth and yield. Soil compaction treatment was divided into three soil bulk densities i.e. 0.8, 1.0, and 1.2 g/cm3. Each soil compaction was treated by rice straw mulch application in various doses i.e. 0%, 30%, 60%, and 90% of covered surface. Completed random design is used as experimental design and Honesty Significant Different (HSD) is used to identify the effect of treatment. The results showed that the interaction between soil compaction and mulch affect significantly on plant height in 5 weeks after growing, number of tillers in 4 weeks after growing, wet weight of root, wet biomass, weight of dry grain at harvest, time of harvest. Soil compaction was significantly affecting the field capacity water content, soil resistance before planting, plant height at 7 and 8 weeks after growing, number of tillers at 6, 8, and 9 weeks after growing also dry biomass also water content, bulk density and total of pore spaces after planting. Mulch application had only significant effect on plant height at 6 weeks after harvest. Soil bulk density suited for paddy growth and yields is 1.0 g/cm3 with 90% of mulch dose.
Keyword: upland rice, Situ Patenggang, straw rice mulch, soil compaction

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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