Judul: The Role of Rhizobacteria and Ecoenzyme in The Growth Gaharu (Aquilaria malaccensis Lamk.)
Abstrak: Inokulasi rizobakteri dan aplikasi ekoenzim diketahui dapat meningkatkan pertumbuhan tanaman. Penelitian ini bertujuan mengkaji potensi rizobakteri dan ekoenzim terhadap pertumbuhan Aquilaria malaccensis Lamk. Penelitian menggunakan rancangan tersarang dengan ekoenzim sebagai anak petak yang tersarang pada inokulasi rizobakteri (Serratia marcecscens, Stenotrophomonas maltophilia, dan campuran S. marcescens + S. maltophilia) sebagai petak utama. Hasil penelitian menunjukkan inokulasi rizobakteri dan aplikasi ekoenzim tidak berpengaruh terhadap tinggi, diameter, jumlah daun baru, berat basah total, berat kering total, dan kadar air bibit. Jumlah tunas baru pada perlakuan inokulasi S. marcescens tanpa ekoenzim meningkat sebesar 112,5% dibandingkan dengan kontrol. Aplikasi ekoenzim pada bibit yang diinokulasi rizobakteri dapat merangsang pertumbuhan akar dan warna daun yang lebih hijau. Nilai nisbah pucuk akar dan indeks mutu bibit gaharu yang dihasilkan dari penelitian ini menunjukkan bibit siap dipindahkan ke lapangan. Hasil penelitian ini dapat digunakan sebagai acuan dalam mengaplikasikan pupuk hayati pada tanaman kehutanan, khususnya pada jenis yang pertumbuhannya lambat., Rhizobacteria inoculation and ecoenzyme application can improve seeds' growth. This research aims to study the potency of rhizobacteria and ecoenzyme to improve Aquilaria malaccensis Lamk. growth. The experimental design used a nested plot design where ecoenzyme as the sub-plot that nested in rhizobacteria inoculation (Serratia marcecscens, Stenotrophomonas maltophilia, and the mix of S. marcecscens + S. maltophilia) as the main plot. The results showed that rhizobacteria inoculation and ecoenzyme application were no significant impact on improve the plant height, diameter, amount of new leaves, total fresh weight, total dry weight, and plant moisture content. The new shoots on S. marcescens inoculation without ecoenzyme increased 112,5% compared to the control. Application of ecoenzyme to the plants inoculated by rhizobacteria promoted root growth and made the leaves got greener. Shoot root ratio and seedling quality index showed that seeds were ready to transplant in the field. The results of this study can be used as a reference in applying biofertilizers to forestry plants, especially the slow-growing species.
Keyword: Aquilaria malaccensis, ecoenzyme, Serratia marcescens, Stenotrophomonas maltophilia, leaf color

Judul: Aplikasi bakteri Methylobacterium sp. terhadap  pertumbuhan dan perakaran tunas gaharu (Aquilaria malaccensis Lamk) hasil In-vitro
Abstrak: Aquilaria malaccensis is forest plant species that have substances of resin and economic valuable. For many people and industry, resin usually called "gaharu", used for medicine like stomachache drug, asphyxia, pregnant lasing and rheumatism; industrial raw material of parfume and cosmetic also complement of custom need. In technology progress and increasing of agarwood exploited make agarwood commodity has been decrease. So, by CITES its classified as one of the scare crop (Appendix II). Various method propagation had been conducted including breeder of vegetatif in-vitro culture (biotechnology) with it varioous modification treatment of griwth subtance regulator, condition of other growth factor and also environment bur rooting agarwood/gaharu still being one of many problems in this propagation method. Bacterium application of Methylobacterium sp. which have been reported to yield phytohormon or growth subtance regulator that needed for growth and development plant that hpefully can be one of alternative way to overcoming constraint in culture in-vitro . The aim of this research are to study the influence, to decide the strain and to decide the efective soaking time of Methylobacterium sp. for growth and rooting of Aquilaria malacceensis (gaharu) shoot
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Judul: Centrality test for Non-Normal And Skewed Population
Abstrak: The t modified 2 test is more robust than t test for skewed popnlation. This test tolerate the population skewness from -1.2 to 1.2 sample size is reather than 25. The sign test robust to the populated skewed population, but the value of the estimated always close to the size of the tcst. Wilcoxon test is not robust to the population skewness. This test is more suittalble for Symmetric population
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