AUTHOR=Sanjuan Juan , Delgado MarĂ­a J. , Girard Lourdes TITLE=Editorial: Microbial Control of the Nitrogen Cycle JOURNAL=Frontiers in Microbiology VOLUME=11 YEAR=2020 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2020.00950 DOI=10.3389/fmicb.2020.00950 ISSN=1664-302X