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. 2020 Jun 14;16:87. doi: 10.1186/s13007-020-00625-1

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© The Author(s) 2020

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 10 — Relationship between fresh above-ground biomass (AGB) and fresh below ground biomass (BGB) of cassava with multi-temporal VIs (Normalized Difference Red-Edge, NDRE and Green Normalized Difference Vegetation Index GNDVI) during trial two. a Ground truth AGB versus multi-temporal NDRE index at EL (Elongation), EBK (Early Bulking), and LBK (Late Bulking stage). b Ground truth BGB and multi-temporal GNDVI index at EL (Elongation) and LBK (Late Bulking) stage