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

Figure 3.

Figure 3

Relationship between nitrous oxide (N2O) emission and (A) grain N (GNU) and total N uptake (TNU) and N recovery efficiency (NRE), and (B) net N balance (NNB) relative to TNU, GNU and surplus N (SN) when management focused on N application rate and timing combination across Indiana and Minnesota (United States), and New Brunswick (Canada). n = number of N rate groups and points within each n group are mean values of 12, 4, 14, 8, 12, and 4 observations, respectively.