Measured leaf %N and predicted canopy N%. Comparison of the measured leaf-level and predicted canopy-level %N for C. scoparius (yellow) and 22 other plant species (Site; green) sampled at the CGOP in May 2019. Note that the y-axis scale varies, with the relative %N values predicted by PROSAIL being negative. This occurs as a result of using the relatively lower reflectance values generated by PROSAIL with a PLSR model developed using leaf-level spectra.