A laboratory soil column experiment was conducted to study the leaching behavior of atrazine and metribuzin in red sandy soil and clayey soil type of TCRS, Yethapur. In atrazine applied plot, chlorotic patches were observed in all the seedlings raised from 0 - 40 cm depths (0 – 5, 5–10,10-15, 15-20, 20 -30 and 30- 40 cm. Chlorosis was not observed in the seedlings raised in the soil depths of 40 - 50 cm and 50 -60 cm.This showed that atrazine traces are found in a depth of 0-40 cm. Application of metribuzin showed chlorosis in all the depths and also showed tip burning in blackgram. From this study, it can be recommended that metribuzin should not be applied in red sandy soil and clayey loam soil (loose soil texture) as this would result in poor weed control efficiency since they are subjected to leaching in deeper layers.