metagenome
host
not applicable
isolation_source
not applicable
collection_date
not applicable
depth
not applicable
geo_loc_name
not applicable
lat_lon
not applicable
Tissue_Type
negative control
Nucleic_Acid
DNA
Amplicon
nifH
Sample_or_decontam
for decontam only
distinguishing_ID
Neg2-nifH
BioSampleModel
Metagenome or environmental