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. 2017 Sep 12;7:11391. doi: 10.1038/s41598-017-11681-4

Figure 2.

Figure 2

Relationship between extractable K and plant K uptake in wheat shoots grown in small (open symbols) or large (closed symbols) pots and receiving 4 rates of K fertilizer. Soils with CEC < 10 cmol kg−1 are represented by circles while square symbols represent soils with CEC > 10 cmol kg−1.