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. 2017 Jun 23;8:1080. doi: 10.3389/fpls.2017.01080

Figure 4.

Figure 4

Relationship between nitrous oxide (N2O) emission and (A) grain N uptake (GNU), (B) total N uptake (TNU), net N balance for (C) grain N [NNB(GNU)] (D) total N uptake [NNB(TNU)] and (E) surplus N (SN), and (F) N recovery efficiency (NRE) when N was applied preplant/at planting and early sidedress (V6) across Indiana (United States) and New Brunswick (Canada). n = number of N rate groups, and points within each n group are mean values of 4, 4, 2, and 4 observations, respectively.