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. 2014 Oct 7;9(10):e109161. doi: 10.1371/journal.pone.0109161

Figure 3. NH4 +-N measured at various distances from the rice root surface in paddy soils with different fertility levels (A) 40 d after germination, (B) 50 d after germination, and (C) 60 d after germination, relative to the (D) control (without rice plants).

Figure 3

The bars indicate ±SD. Dots and bars with * indicate a significant difference (p<0.05) between the two fertility levels.