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Fig. 5. Net nitrification rates (NR) on an areal basis versus NR predicted from multiple regression models in the form of Eq. [1] with 
= 2, using (a) landscape factors, (b) landscape factors and soil chemical properties, and (c) landscape factors, soil chemical properties, and microbial process rates. Regression coefficients (ai) shown for each independent variable (Ai) in order of decreasing importance to overall model. El = elevation (m); S = Southness; SM = sugar maple basal area; StM = striped maple basal area; CON = conifer basal area (m2 ha-1); C/N = kg C kg -1 N on areal basis; Mr = net N mineralization rate (kg N ha-1 d-1); * signifies p < 0.05; **signifies p < 0.01; *** signifies p < 0.001.
