Kinetic parameters obtained by fitting of the eqs 1 and 2.

Means and standard deviations of three replicates are given. Small letters in brackets indicate significant differences between the half-life periods of the different GLS hydrolysis products at the p < 0.05 level (Fischer LSD test) tested for each soil individually. ^aITC: isothiocyanate; ^bCETP: 1-cyano-2,3-epithiopropane, ^c4-MTB-ITC: 4-(methylthio)butyl ITC; ^d4-MT-3But-ITC: 4-(methylthio)-3-butenyl ITC.

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