Fig. 4. The fraction of dicamba remaining in soil samples as a function of time. (a) 4°C and 0.18 water content, (b) 4°C and 0.25 water content, (c) 20°C and 0.18 water content, and (d) 20°C and 0.25 water content. The solid line indicates the curve described by Eq. [1].