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. 2022 Apr 29;13:869680. doi: 10.3389/fpls.2022.869680

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Copyright © 2022 Martínez-Peña, Schlereth, Höhne, Encke, Morcuende, Nieto-Taladriz, Araus, Aparicio and Vicente.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Green area (GA), greener green area (GGA), crop senescence index (CSI), and normalized difference vegetation index (NDVI) in four varieties of field-grown durum wheat (Kiko Nick, Don Ricardo, Euroduro, and Haristide) at two N levels (control vs. low N) measured at the canopy level. Asterisks indicate a significant difference between varieties (G) and N levels (N) according to the two-way ANOVA(*, p < 0.05; **, p < 0.01; ***, p < 0.001). The interaction G × N did not reach significance for these parameters.