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Environmental Sciences Europe
Fig. 3 | Environmental Sciences Europe

Fig. 3

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

Fig. 3

Relationship between PDL and PCAL concentrations and PDGT concentrations. Analyses were conducted for all treatments (control, mineral P, organic P, mineral + organic P), all experimental sites (Dahlem, Freising Dürnast, Bad Lauchstädt, Rostock), and the sampling depths 0–30 cm, 0–60/70 cm, and 0–90 cm. Significant correlations were highlighted with *(P < 0.05), **(P < 0.01), and ***(P < 0.001). DL double-lactate, CAL calcium acetate lactate, DGT diffusive gradients in thin films

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