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Fig. 2. Change in soil inorganic N (NO3 and NH4) concentrations over the growing season in three forests on Isla de Chiloé, Chile, as measured by the in situ resin core method of estimating N mineralization. "Pre-incubation" values represent inorganic N in the soil just before installing incubations; "post-incubation" values represent the amount of inorganic N accumulated and leached from the incubation after approximately 4 wk. Standard error bars are shown. The difference between pre- and post-incubation concentrations represents the amount of N mineralized (positive difference) or immobilized (negative difference) during that period.
