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Fig. 2. Phosmet sorption isotherms for the Ferrosol (0–3 mg L-1) at depths of 0 to 0.05 m ({diamondsuit}), 0.05 to 0.1 m ({blacksquare}), 0.1 to 0.2 m ({blacktriangleup}), and 0.2 to 0.3 m (•), with fitted Freundlich isotherms (0.05–0.1, 0.1–0.2, 0.2–0.3 m) and a fitted linear isotherm (0–0.05 m) (——).