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Environmental Sciences Europe
Fig. 2 | Environmental Sciences Europe

Fig. 2

From: Subsoils—a sink for excess fertilizer P but a minor contribution to P plant nutrition: evidence from long-term fertilization trials

Fig. 2

Plant available P concentration as determined by the diffusive gradients in thin films (DGT) approach. Samples were obtained from the long-term experimental sites Dahlem, Freising Dürnast, Bad Lauchstädt, and Rostock at different soil depths. Different lowercase letters indicate significant differences among treatments within each soil depth (P < 0.05). Error bars represent standard deviations of the mean (n = 3). No statistical analysis could be conducted for samples from Bad Lauchstädt as no field replicates were available

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