Organic Amendments Addition on Altering the Sorption, Vertical Movement and Leaching Behavior of Herbicides in Soil

Herbicides are applied indiscriminately to achieve maximum weed control in agricultural production which might contaminate the food chain through bio-augmentation of residue concentration soil. One management suggested overcome herbicides contamination is treating with various organic amendments. Hence laboratory column leaching and sorption experiments were conducted Tamil Nadu Agricultural University (TNAU), Coimbatore investigate behavior viz., pendimethalin, atrazine imazethapyr soil as influenced by amendments @ 5t/ha FYM, vermicompost, composted coir pith, maize crop biochar. Leaching experiment was using PVC columns 45 cm length study different concentrations chosen per OECD guidelines. Results showed that movement studied modified particularly biochar residue. Biochar treated retained 29.76, 40.20, 38.07 percent respectively surface 0-15 depth reduced its lower depths leachates. adsorption higher indicated Koc values 225, 184 22 mg/L for followed It concluded application amendment efficient decreasing modifying their potential groundwater.