AUTHOR=Tshishonga Unarine E. , Malahlela Oupa E. TITLE=Mapping plant nitrogen concentration within Luvuvhu River Catchment using Sentinel-2 imagery JOURNAL=Frontiers in Environmental Science VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2025.1526906 DOI=10.3389/fenvs.2025.1526906 ISSN=2296-665X