Fig. 5. Variations of leached bromide, atrazine, and metabolites simulated for 50 cm and 180 cm, for 2 yr following a hypothetical application of 208 mg m^–2 on 28 April of each year starting in 1995. Values are 30-d moving averages. Astronomical seasons are used: Sp, Spring (Apr.-June); Su, Summer (July-Sept.); F, Fall (Oct.-Dec.); and W, Winter (Jan.-Mar.).