Fig. 4. Volume fraction of water as a function of depth as measured at the experimental field at 22, 69, and 125 d after bromide and bentazon application (Day 22 is 29 Apr. 1998, Day 69 is 15 June 1998, and Day 125 is 10 Aug. 1998). The thick line is the average of the 16 sampled soil columns and the thin lines are the average plus or minus one standard deviation of these columns.