Assess students' ability to calculate nitrogen and phosphorus loads entering a local lake from agricultural runoff using given concentrations, runoff volumes/flows, watershed area, and runoff coefficients; perform unit conversions and simple mass-balance or load-yield calculations; interpret results relative to water-quality targets; and recommend and justify appropriate best management practices (e.g., buffer strips, cover crops, controlled fertilizer application, retention ponds, constructed wetlands), prioritizing expected load reductions, cost, and feasibility in a brief implementation plan.