Figure 2 | Scientific Reports

Figure 2

From: Effects of nitrogen stress on the photosynthetic CO2 assimilation, chlorophyll fluorescence and sugar-nitrogen ratio in corn

Figure 2

Leaf N concentration on August 16th (a), September 6th (b) and September 17th (c) of corn subjected to low (LN, 0 kg N ha−1), medium (MN, 75 kg N ha−1) and high (HN, 150 kg N ha−1) levels of N application over three cropping seasons (2002 and 2003).

Data are average values across 2 years with ± one standard error (vertical bars). ANOVA results for (a) August 16th: nitrogen (N), P < 0.034; corn cultivars (C), P = 0.041; N × C, P = 0.865; (b) September 6th: N, P < 0.006; C, P = 0.035; N × C, P = 0.667; (c) September 17th: N, P < 0.041; C, P = 0.456; N × C, P = 0.766.

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