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. 2015 Jun 23;5:11409. doi: 10.1038/srep11409

Figure 2. Vertical distributions of δ13C in SOC, fraction of maize derived SOC (fC4) (left column), total SOC (middle column), maize and wheat derived SOC (right column) under control (top row), NPK (middle row) and NPKS (bottom row) at Urumqi.

Figure 2