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Fig. 7. (A) Nitrate N concentrations with depth in soils and deep sediments at Position 1D (Fig. 1), from core samples taken in 1996. (B) Depths of maximum NO3N concentrations measured in 1972, 19741976, 1978, 1984 (Alberts and Spomer, 1985; Schuman et al., 1975), and 1996, plotted against cumulative baseflow from Watershed 1 since 1969.
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