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Competency Area 6: Watershed hydrology AEM

PO 61. Describe the main agricultural point and non-point sources of contaminants in a typical rural watershed in the Northeast.

The main agricultural point or concentrated sources from livestock-based systems are from barnyards, feedlots, silage storage and milkhouse wastewater discharges. For conventional cash grain, horticultural and vegetable production systems, the point sources arise from fertilizer, pesticide and fuel storage areas. The main non-point sources of contaminants from agricultural operations are sediments (largest on a mass basis), phosphorus, pesticides, pathogens, and nitrate-nitrogen (usually from tile drain discharges).