title: Requisite sampling frequency for measuring nutrient and pesticide movement with runoff waters.
mesh_terms: D002713:Chlorine / Q000032:analysis; D004026:Dieldrin / Q000032:analysis*; D005069:Evaluation Studies as Topic; D008722:Methods; D009566:Nitrates / Q000032:analysis; D010710:Phosphates / Q000032:analysis; D011188:Potassium / Q000032:analysis; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D012987:Soil; D013997:Time Factors; D014867:Water / Q000032:analysis*; D014872:Water Movements
chemical_list: D009566:Nitrates; D010710:Phosphates; D000644:Quaternary Ammonium Compounds; D012987:Soil; D014867:Water; D002713:Chlorine; D004026:Dieldrin; D011188:Potassium