title: Organochlorine insecticide residues in agricultural soils of the indo-gangetic plain.
abstract: Multiple residues of organochlorine insecticides were monitored in the agricultural fields near Farrukhabad in the vicinity of the River Ganga in northern India for one year (1991-1992). Almost all soil samples were found to be contaminated with residues of hexachlorocylohexane (HCH) and dichlorodiphenyl-trichloroethane (DDT). Residues of aldrin and endosulfan were also detected in a large number of samples. Heptachlor residues were scarcely detected. Alpha-HCH, pp'-DDT and alpha-endosulfan were found to dominate over the other isomers/metabolites of HCH, DDT and endosulfan, respectively. The average concentration of dieldrin was more than that of aldrin. The concentrations of residues progressively increased up to a depth of 1 m.
authors.affiliation: Division of Agricultural Chemicals, Indian Agricultural Research Institute, 110012, New Delhi, India.
authors.forename: N P
authors.initials: NP
authors.lastname: Agnihotri
authors.forename: G
authors.initials: G
authors.lastname: Kulshrestha
authors.forename: V T
authors.initials: VT
authors.lastname: Gajbhiye
authors.forename: S P
authors.initials: SP
authors.lastname: Mohapatra
authors.forename: S B
authors.initials: SB
authors.lastname: Singh