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. 2016 Jun 6;6:27064. doi: 10.1038/srep27064

Figure 3. Distribution of short-term nitrification activity in Yingtan (YT) and Qianjiang (QJ) paddy soils.

Figure 3

The concentric circles in the upper row represent YT paddy soil, and the concentric circles in the row below represent QJ paddy soil. The nitrification activities measured at different distance from the fertilisation site (the circles in the concentric diagrams, from inside to out, represent 0, 2, 4, 6, 8, 10, 20, 30 and 40 mm away from the fertilisation zone, respectively) at different sampling dates (the concentric circles left-to-right represent 1, 3, 5, 7, 10, 15 20, 40 and 70 days after fertilisation, respectively). Mean values are shown for a sample size of three replicates.