Effect of Soil Properties on the Persistence of Fluchloralin

The degradation pattern of the herbicide fluchloralin was studied in twelve different soils with varying pH, EC, CEC, texture and organic carbon content by an incubation study at field capacity moisture level. The results showed that the degradation of fluchloralin was influenced by the clay content and the persistence was longer in soils with higher clay content. After 60 days of incubation the residues were below detectable level in soils with low clay content while traces were detected in soils having higher clay percentage. The half-life (t_1/2) ranged from 6.1–12.0 days is the soils.