Fig. 1. Twenty-four-hour average sulfometuron concentration in streamflow from two watersheds in Mississippi treated with 0.42 kg a.i. ha^-1 (sprayed) or 0.37 kg a.i. ha^-1 (pelleted). For graphing purposes, 0.1 µg L^-1 was substituted for samples containing either a trace or nondetectable amounts of sulfometuron.

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