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

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Fig. 9 — Stock changes of a organic and inorganic P, b different P forms in the mineral soil, and c different Hedley P fractions during pedogenesis of soils on limestone in the Swabian Alb (Tuttlingen region). TUT SW: Profile Tuttlingen SW (Rendzic Leptosol, age < 12,000 years). TUT NE: Profile Tuttlingen NE, (Rendzic Leptosol with BA horizon, age < 12,000 years. BAE: Profile Bärenthal (Cambisol, age > 2.5 million years). P stock bound in stone and grit of TUT NE based on a bedrock P content of 150 mg P kg⁻¹