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. 2019 Feb 15;14(2):e0211889. doi: 10.1371/journal.pone.0211889

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© 2019 Fernández et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 5 — Relationships between the spectral indices (a) NDVI, (c) ChlNDI and (e) mSR₇₀₅ derived from a spectroradiometer or (b) NDVI, (d) GR and (f) NDVIrgb obtained with a conventional camera with Chlorophyll Content Index (CCI). Data are for final grain filling (n = 12).