Judul: Dinamika Air Dalam Tanah Dan Hubungannya Dengan Sifat-Sifat Struktur Tanah Pada Latosol Semplak
Abstrak: Water in soil is important for plant growth as nutriment, nutriment solvent, and nutriment dissolve flow in soil. Volume and water distribution in soil affected by some factor. The factor e. g : soil structure. Soil structure related with soil pore distribution, which is affected water flow and distribution water in soil. In fact, soil structure has many variant both spatial and temporal. Many variant of soil structure caused the high variant pore distribution. Variant of soil structure could happen because of the different land cultivate. The aim of this research are to the dynamics of water in soil at ex-rice field land and dry land and the ationship with soil structure characteristics. This research starting with soil selection which have different soil stucture characteristic (aggregate stability, aggregate distribution, and pore distribution), taking soil sample, soil analysis at the laboratory, experiment and measurement in spacious, and analyse data. Soil moisture ex-rice field land always higher than dry land. Soil moisture ex-rice field land and soil moisture dry land will be higher at deeper soil layer above layer. Dynamics of change soil moisture beetwen ex-rice field land and also dry land caused by different of rain distribution also soil physical characteristic. Relation link among of soil physical characteristic to soil moisture dynamics seen different each other. Soil aggregate stability index have negative correlation with soil moisture. Excelsior soil aggregate satibility index, make soil moisture decreased, and conversely. Total porosity and micropore have positive correlation with soil moisture. Excelsior total porosity and micropore, make soil moisture increase. But the correlation of macropore to soil moisture on ex-rice field land differ from dry land, that is increase of macropore to dry land the degrade soil moisture, whiel on the ex-rice field land raising of macropore can be raise soil moisture.
Keyword: 

Judul: Karakteristik Fisik Tanah dan Dinamika Kadar Air Tanah pada Berbagai Penggunaan Lahan (Studi Kasus : Kebun Percobaan Cikabayan)
Abstrak: The water supply in dryland agriculture relies on rain water. Erratic rainfall which is often compounded by high intensity of sun light causes a high evapotranspiration, so that soil water is significanly decrease. Changes in soil water levels is variable depending on land use type and is affected by various factors. The dynamic of soil moisture content is then strongly influenced by rainfall pattern and physical characteristic of soil, where the soil characteristic itself is influenced by land use type. This study aims to determine physical characteristic of soil and dynamic of soil water in various land use and rainfall in The Experiment and Research Garden of Cikabayan, IPB, Dramaga, Bogor. Each land use has different permanent wilting point and soil water level due to difference in density of canopy or the depth of soil layer. The field soil moisture content under oilpalm is still higher than the permanent wilting point although no rain for eight days. It may be caused by the dense canopy of palm trees which can reduce the rate of evaporation. The field soil moisture content under citrus fall below the wilting point at the sixth day after rain (on 10-30 cm layer) and the eighth day after rain (30-50 cm layer), while soil under annual crop is still possibly providing water supply even though no rain for eight days .
Keyword: 

Judul: Respon Tanggap Kebal Bebek terhadap Vaksin AI H5N1 Monovalen (Clade 2.3.2) dan Vaksin AI H5N1 Bivalen (Clade 2.1.3 dan Clade 2.3.2)
Abstrak: Bebek merupakan salah satu unggas air yang dikenal sebagai reservoir virus Avian Influenza (AI). Bebek yang terinfeksi tidak memperlihatkan gejala klinis dan memiliki titer antibodi yang rendah. Tujuan dari penelitian ini adalah mengetahui titer antibodi bebek yang divaksinasi menggunakan vaksin monovalen dan bivalen. Sembilan puluh bebek dibagi menjadi 3 kelompok dan setiap kelompok berisi 30 ekor. Kelompok pertama adalah bebek yang divaksinasi dengan AI H5N1 monovalen (clade 2.3.2), kelompok kedua adalah bebek yang divaksinasi dengan AI H5N1 bivalen (clade 2.1.3 dan 2.3.2), dan ketiga adalah kontrol. Vaksinasi dilakukan pada hari ke-10 dan 31. Sepuluh sampel serum dari masing-masing kelompok dikoleksi pada hari ke-17, 21, 28, 31, 38 dan 42 dilanjutkan dengan uji Hemaglutinasi Inhibisi. Hasil penelitian menunjukkan bahwa vaksin monovalen dapat menginduksi titer antibodi yang lebih tinggi dari pada vaksin bivalen pada bebek.
Keyword: bebek, hemaglutinasi inhibisi, vaksin, monovalen, bivalen