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Fig. 1 | SpringerPlus

Fig. 1

From: Application of ionomics to plant and soil in fields under long-term fertilizer trials

Fig. 1

Radar plot representing the concentration of each element relative to the +NPK treatment. Concentrations of 0.1 M HCl-extractable elements, except those of N and Cs, are presented. For N and Cs, the water-extractable and total concentrations, respectively, are shown. The bold line indicates the relative concentration in the +NPK treatment (=1). +NPK, complete fertilization; −N, fertilization without N; −P, fertilization without P; −K, fertilization without K; −NPK, no fertilization. Values are means (n = 3), and bars indicate ± standard errors. Asterisks indicate statistically significant differences compared with +NPK (Student’s t test, *P < 0.05, **P < 0.01)

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