Ddt residues on pasture and in the butter-fat of cows grazing pasture treated with ddt prills and ddt/superphosphate

摘要

DDT was determined in the butterfat of cows grazed on pasture at various intervals after it had been top-dressed with either DDT priUs or DDT/superphosphate dust, each at a nominal rate of 2 lb pp#x2032;-DDT/ac.