Fig. 2 Time course of the canopy variables (A) leaf area index (LAI) and (B) fractional intercepted photosynthetically active radiation (fIPAR) and the vegetation indices (C) normalized difference vegetation index (NDVI) and (D) simple ratio (SR). Bars represent ± the standard error of the mean (n = 3). For the sake of clarity only, 0, 100, and 200 kg ha^-1 N treatments are depicted. DAS is days after sowing

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