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. 2017 Apr 24;7:1001. doi: 10.1038/s41598-017-01143-2

Figure 2.

Figure 2

The relative yield (mean ± SD) of N, P2O5 and K2O fertilizer applications at low (LAE), medium (MAE), and high agronomic efficiency (HAE). Within each level, different capital letters indicate a significant difference at P < 0.01, whereas among the agronomic efficiency (AE) levels different lower-case letters indicate a significant difference at P < 0.05.