Judul: Pengaruh Teknik Budidaya LEISA Terhadap Karakteristik Fisik Tanah Pada Sistem Rotasi Tanaman Sayur.
Abstrak: Fertile soil conditions is needed to support the increase in crop production. Soil fertility is determinated by physical, chemical, and biological properties of soil. Excessive use of anorganic external inputs can affect the physic properties on the ground. This condition will result in changes the level of soil fertility. In this research, the measurement of the changes in soil physic properties due to different techniques in cropping rotation, the system of cultivation techniques LEISA (Low External Input Sustainable Agriculture), HEIA (High External Input Agriculture), and forests. Parameters to be measured in this study were soil texture, organic matter content, bulk density, soil water retention, and soil penetrability. Measurement of soil physic properties was conducted on soil depth of 0-20 cm and 20-40 cm. Land on the three sample sites have the same soil type and slope are relatively the same. The data obtained showed the soil on LEISA and HEIA have percent C-organic lower than forest (3,25%), higher bulk density than forest (0,85 g/cm3), lower soil penetration than forest (1,36 kg/cm2). LEISA have higher percent organic c (0.77%) than HEIA (0.71%), lower bulk density (0.89 g / cm3) than HEIA (1.08 g / cm3), the availability of water greater than the soil on HEIA, and soil penetrability lower (0.95kg/cm2) compared with the soil on HEIA (1.23kg/cm2)
Keyword: cropping rotation, HEIA, LEISA, physical properties

Judul: Pengaruh Berbagai Bahan Pembenah Tanah terhadap Sifat Fisik Tanah Latosol untuk Budidaya Tanaman Sayuran.
Abstrak: Vegetables need proper physical conditions of soil, for instance fertile, porous, has a good aeration and drainage, and also capable to holding enough water. Those conditions are required by the smooth root of vegetables to support its growth. Vegetables are generally cultivated on Andosol soils which are spread around the mountain areas and eroded easily, in order that, most of Andosol soils are used as conservation areas or protected forest. The best alternative to bear vegetables cultivation areas is Latosol soils since the soils are dominant and widely spread in Indonesia. However, the physical properties of Latosol soils are not good enough for vegetables cultivation compared with Andosol soils. To overcome these, in this research some soil ameliorant were added into Latosol soils to increase the good properties condition to support the growth of vegetables. The research was aimed to study the effect of various soil ameliorant on physical properties of Latosol soils for vegetables cultivation. There were six treatments in this research, i.e. soil and husk charcoal (1/2:1/2), soil and cocopeat (1/2:1/2), soil and compost (1/2:1/2), soil and compost and mixed husk charcoal (1/3:1/3:1/3), soil and compost and mixed with cocopeat (1/3:1/3:1/3), and control (soil tillage without soil ameliorant addition). Soil sampling for each treatment was carried out after the soils were used to cultivate vegetables and after the harvest time, and those soils still in the naturally condition after for one year. The results showed that ameliorant treatments that were husk charcoal, cocopeat, compost, compost and mixed with husk charcoal, compost and mixed with cocopeat reduced the value of bulk density (BD). Husk charcoal treatment showed the lowest bulk density of the two upper layers (0-5) and (5-10) cm is 0.70 and 0.80 g/cm3, whereas the control showed the highest bulk density of the two upper layers (0-5) and (5-10) cm is 0.83 and 0.93 g/cm3. Application of soil ameliorant treatments also changed the distribution of pore size in soils and improved the water holding capacity of soils. The volume of soil field water from the lowest to the highest in sequence were husk charcoal treatment (39.90%), control (45.61%), compost (47.10%), cocopeat (48.42%), compost and mixed with husk charcoal (52.27%), compost and mixed with cocopeat (52.84%). Treatment with aggregate size ≤2 mm and ≥2 mm from the highest to the lowest in sequence were husk charcoal treatment, cocopeat, compost and mixed with husk charcoal, compost, compost and mixed with cocopeat, control. Soils with ≤2 mm and ≥2 mm too high aggregate sized were not ideal for plant root growth. Therefore, the ideal treatment for plant root growth was compost treatment.
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Judul: Pengklonan gen VP28 Penyandi Viral Protein-28 dari virus white spot syndrome sebagai langkah awal produksi vaksin rekombinan udang penaeid
Abstrak: Usaha produksi udang dalam negeri saat ini sedang mengalami kendala akibat serangan penyakit white spot syndrome virus (WSSV) pada jenis udang windu (Penaeus monodon). WSSV yang termasuk virus DNA berukuran besar dapat menginfeksi udang dan berbagai jenis crustaceae lainnya. Virus ini merupakan patogen yang sangat ganas dan paling serius menyerang udang. Serangannya begitu cepat, sangat sulit dihentikan dan dapat mematikan 100% udang peliharaan dalam waktu 3-10 hari setelah munculnya gejala klinis. Serangan virus ini juga telah menghancurkan industri udang di berbagai negara. Infeksi WSSV ditandai dengan adanya bintik putih atau bercak putih pada eksoskeleton dan epidermis terutama pada bagian karapas udang. Hingga saat ini belum ada cara tradisionalyang efektif mencegah dan menanggulangi penyakit ini.
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