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Temporal dynamics of the nitrogen nutrition index (NNI) for the sweet pepper (Capsicum annuum) crops in the (a) 2014, (b) 2016, and (c) 2017 crops, subjected to five different N treatments with four repetitions. Values are means (n = 4) ± standard error (±SE). DAT is days after transplanting. Vertical dotted lines represent the different phenological stages; the horizontal dotted line indicates NNI = 1.
