tyIost .of the insecticidal residues of fensulfothion, fenitrothion, carbofuran, and DDT remallled III the top 30 mm of the soil when applied as granules to a pasture at the rate of 2.24 kg a.i./ha. Only a trace of fenitrothion was present in the soil 7 weeks after treatment wher~as af.te,r 30 w<:eks some fensulfothion and most of the DDT residues were still present: The Illse~tlcldes haC! ,no detectable effect on soil moisture and bulk density, or herbage yield and specIes compOSItIOn.