Fig. 4: Variations in response ratios of grain yield and grain Zn, Fe and protein concentrations of bread wheat with soil variables in treatments involving application of Zn and Fe. | Nature Food

Fig. 4: Variations in response ratios of grain yield and grain Zn, Fe and protein concentrations of bread wheat with soil variables in treatments involving application of Zn and Fe.

From: Grain zinc, iron and protein concentrations of contemporary wheat cultivars fall short of targets for human health

Fig. 4: Variations in response ratios of grain yield and grain Zn, Fe and protein concentrations of bread wheat with soil variables in treatments involving application of Zn and Fe.

a–d, RR of grain yield (a) and grain Zn (b), Fe (c) and protein (d) concentrations. The horizontal bars represent the 95% CIs. When the CIs encompass RR = 1, the Zn (±) treatment is not significantly different from the NPK control. Values in parentheses after the soil type represent the total sample sizes, while those on the left side of the horizontal bars represent the marginal means.

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