Assess students' ability to analyze sources (point and non-point), transport pathways (surface runoff, subsurface flow, tile drains, streambank erosion), and ecological impacts (eutrophication, hypoxia, benthic habitat loss) of nitrogen, phosphorus, and sediment in agricultural watersheds, with emphasis on how changing precipitation regimes (intensity, frequency, seasonality) modify mobilization, delivery, and mitigation effectiveness; items should require data interpretation (load and concentration calculations, event vs. baseflow contributions), diagram-based pathway analysis, and evaluation of management practices (buffer strips, cover crops, retention ponds) under future precipitation scenarios.