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Fig. 9. Mineralization of Alorganic matter precipitates (Al/C ratio 0.1) produced from dissolved organic matter solutions from the Oa and Oi horizons of a beech and a spruce forest at pH 3.8 and 4.5 (incubation at pH 4.5 and 20°C for 7 wk). Mean values and standard error of three replicates.
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