Fig. 1. Total Zn contents versus soil pH for acidic (pH <6; Table 2) and neutral (pH 6; Table 3) soils (separated by vertical dashed line). Soils with total Zn contents of <23 mmol kg^–1, 23 to 78 mmol kg^–1, and >78 mmol kg^–1 are separated by horizontal dashed lines.