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Fig. 2. Radiostrontium aging: effect of temperature (–20, 10, 40, and 70°C), time, and drying–wetting cycles (5 d: 5D*; 1 mo: 1M*; 4 mo: 4M*; 8 mo: 8M*; 12 mo: 12M*) on Sr extraction yields (n = 3; bars indicate one standard deviation) in all examined soils (Entisol; Spodosol 3; Alfisol; Spodosol 5; Mollisol; Peat). Initial extraction yields (I) are represented by a hatched area (mean value ± one standard deviation). For the Spodosol 3 and Peat soils, the extraction yields of the 6 yr (6Y) field samples are also indicated by a hatched area (mean value ± one standard deviation).
