Fig. 1. Comparison of degradation of methyl isothiocyanate (MITC) and chloropicrin (CP) in two fumigated nursery soils and two nonfumigated forest soils at application rates of 195 kg ha^–1 for MITC and 140 kg ha^–1 for CP in incubation at 22°C. The points are means of triplicate samples (±standard errors).