title: DDT moratorium in Arizona--agricultural residues after 4 years.
mesh_terms: D001130:Arizona; D002849:Chromatography, Gas; D003634:DDT / Q000032:analysis*; D003633:Dichlorodiphenyl Dichloroethylene / Q000032:analysis; D003632:Dichlorodiphenyldichloroethane / Q000032:analysis; D000455:Medicago sativa / Q000737:chemistry; D010573:Pesticide Residues / Q000032:analysis*; D012987:Soil / Q000032:analysis; D013997:Time Factors
chemical_list: D010573:Pesticide Residues; D012987:Soil; D003633:Dichlorodiphenyl Dichloroethylene; D003634:DDT; D003632:Dichlorodiphenyldichloroethane