Fig. 6. Competitive degradation of 1,3-dichloropropene (1,3-D) isomers in amended Arlington sandy loam (amendments added at 0.5 mmol/kg). Initial chloropicrin (CP) and 1,3-D applied concentrations were 0.1 and 0.4 mmol/kg, respectively. The points are the means of three measurements (±standard errors).