Rhizosphere
Diazotroph
Biology
Upland rice
Agronomy
Microbial population biology
Nitrogenase
Denitrifying bacteria
Temperature gradient gel electrophoresis
Bacteria
Botany
Oryza sativa
Nitrogen fixation
16S ribosomal RNA
Denitrification
Chemistry
Nitrogen
Biochemistry
Gene
Genetics
Organic chemistry
