Bioassay, FYM, Leaching, Oxyfluorfen

Leaching behavior of oxyfluorfen herbicide was evaluated under laboratory conditions in FYM amended (20 t/ha) and un-amended sandy clay loam soil.  Oxyfluorfen at recommended and double the recommended level was applied in soil in PVC columns (10 cm diameter and 60 cm long). After seven days, the presence of herbicides at different soil depths was determined through bioassay by using maize as sensitive crop. The study revealed that oxyfluorfen leaches up to 30 to 40 cm in sandy clay loam soil and the leaching decreases to 20 to 35 cm by amendment of FYM indicating that organic carbon content is an important factor that influence the leaching of oxyfluorfen.