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. 2022 Feb 2;158(1):39–72. doi: 10.1007/s10533-021-00884-7

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Fig. 6 — Phosphorus forms quantified by ³¹P-NMR spectroscopy of soil NaOH-EDTA extracts from O layer and mineral topsoil horizons of profiles Mangfallgebirge N1 and Tuttlingen NE (Wang et al. 2020). Left: Contents in mg P kg⁻¹; bars in shaded gray represent total P in respective horizon. Right: Contribution of different P forms to total extractable P