AUTHOR=Elsayed Salah , Barmeier Gero , Schmidhalter Urs TITLE=Corrigendum: Passive Reflectance Sensing and Digital Image Analysis Allows for Assessing the Biomass and Nitrogen Status of Wheat in Early and Late Tillering Stages JOURNAL=Frontiers in Plant Science VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2021.670027 DOI=10.3389/fpls.2021.670027 ISSN=1664-462X