Fig. 2. Map showing the location of 40 study sites in New York. Sites were selected in four areas, i.e., the Adirondacks, the Tug Hill Plateau, the Finger Lakes region, and the Brookfield area in the Reforestation District, south of Utica. These all differed in geological parent material, soil properties, and estimated wet acidic deposition using maps. Within each area, two groups of five sites were placed in two widely separated locations to further ensure that a range of soil properties were sampled.