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Fig. 3. Levels of E. coli in hayland plot runoff by treatment factors and interactions. Error bars represent ±1 standard deviation; bars labeled with different letter(s) differ significantly (P 
0.1). In (C), treatment codes 0, 30, and 90 indicate age of applied manure in days; H (high) and L (low) indicate vegetation height. In (D), treatment codes H and L indicate high and low vegetation; codes 1 and 3 indicate delay between manure application and simulated rainfall in days.
