title: Persistence of organochlorine insecticides in the field in the Gezira soil under cotton.
mesh_terms: D003368:Gossypium; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D012987:Soil / Q000032:analysis*; D013397:Sudan; D013997:Time Factors
chemical_list: D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D010573:Pesticide Residues; D012987:Soil