Judul: Aplikasi Pemberian Bahan Organik terhadap Sifat Kimia dan Fisik Andisol Cisarua, Bogor
Abstrak: Agriculture practices generally use chemical fertilizers. Application of chemical fertilizers continuously can degrade the soil quality and decrease crop production. The application of organic fertilizers is probably can reduce land degradation. The study was conducted from May 2013 to January 2014. Soil samples were collected from Tugu Selatan village, Cisarua, Bogor. The aims of the study was to investigate the effect of long term organic matter application on Andisol, included its effect on soil chemical and physical properties. The results showed that the 26 years application of organic matter have better effect on soil organic matter (SOM), cation exchange capacity (CEC), exchangeable bases, total N, total and available P in soils. The soil organic matter (SOM) increase from 2.82% to 5.10% with 26 year organic matter application. The CEC value increased up to 36.56 me/100g, while the exchangeable bases such as K+ increased from 0.47 me/100g to 2.11 me/100g and Na+ raised from 0.34 me/100g to 0.94 me/100g. Total N increased from 0.16% to 0.33% and 0.41% respectively on organic matter application for 8 and 26 years. Total P value was 8.04 me/100g increased to 15.90 me/100g, while available P increased from 11.85 ppm to 65.55 ppm within 26 years of organic matter application. Meanwhile, improvement of soil quality also showed by soil physical properties. Soil with long term organic matter application has a more granular soil structure, a darker color and also stable aggregates as shown by the SEM photographs.
Keyword: Bogor Agricultural University (IPB), Soil Quality, Organic Matter, Andisol

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: Infectious laryngo tracheitis pada unggas
Abstrak: Infectious Laryngo Tracheitis merupakan penyakit pada unggas yang disebabkan oleh virus yang mempunyai sasaran saluran pernapasan bagian atas Penyebab penyakit Infectious Laryngo Tracheitis Univers (ILT) adalah virus yang termasuk kelompok virus Herpes sering disebut Tarpeia avium. Virus tersebut tersusun dari inti asam deoksi ribonukleat yang dilengkapi dengan pembung- kus yang merupakan derivat dari lemak serta mempunyai garis tengah antara 195-250 nano meter. Pada temperatur kamar virus tersebut dapat bertahan selama 15 hari dalam keadaan tanpa pengawetan. Virus penyebab Infectious Laryngo Tracheitis mempunyai kepekaan terhadap zat kimia golongan pelarut lemak seperti: phenol dan kresol. Induk semang definitip penyakit Infectious Laryngo Tracheitis adalah ayam, tetapi burung merak, itik dan kalkun pernah dilaporkan dapat terinfeksi. Mammalia dan golongan rodensia merupakan hewan yang tahan terhadap infeksi penyakit ini. Pada manusia penyakit Infectious Laryngo Tracheitis diduga mempunyai hubungan dengan timbulnya gangguan neuralgia yang bersifat sub-akut akibat infeksi virus Herpes jenis lain yang disebut virus Sub-acute Myelo Optico Neuropathi (virus SMON).
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