Table 5.7 Kd values for bentazone (Fomsgaard, 1997). Khumus was calculated in this study. Humus [%] Clay [%] Kd [kg/L] Khumus 3.6 16.6 0.23 6.4 0.6 20.9 0.04 6.7 0.6 21.1 0.00 0 3.5 30.5 0.04 1.1 3.7 30.1 0.04 1.1 2.1 7.9 0.17 8.1 0.2 9.7 0.14 70 0.1 6.9 0.00 0