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Fig. 3. Phosmet sorption and desorption isotherms for the Podosol (0–7 mg L-1) at depths of 0 to 0.05 m (ads: {diamondsuit}, des: {diamond}); 0.05 to 0.1 m (ads: {blacksquare}, des: {square}); 0.1 to 0.2 m (ads: {blacktriangleup}, des: {Delta}); and 0.2 to 0.3 m (ads: •, des: {circ}); with fitted Freundlich isotherms for sorption (——) and desorption (——).