Metagenomic of Actinomycetes Based on 16S rRNA and nifH Genes in Soil and Roots of Four Indonesian Rice Cultivars Using PCR-DGGE - Mahyarudin, .; Department of Biology, Faculty of Mathematics and Natural Science, Bogor Agricultural University, IPB Dramaga Campus, Bogor, West Java 16680 (Bogor Agricultural University, Indonesia, 2015)