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Microbiological Characteristics of a Vegetative Buffer Strip Soil and Degradation and Sorption of Metolachlor

^a Dep. Biological Sciences, Eastern Kentucky Univ., Richmond, KY 40475 and formerly, USDA-ARS, SWSRU
^b USDA-ARS, Southern Weed Science Research Unit, P.O. Box 350, Stoneville, MS 38776

View larger version (26K): [in a new window]   Fig. 1. Fate of 14C during the course of the experiment. Results for extractable 14C are shown in (a) with curves representing nonlinear regression fits of the first-order equation. Symbols for (a) are • VBS extractable and BF extractable. The nonextractable and mineralized components are illustrated in (b). Symbols for (b) are VBS Mineralized, BF Mineralized, • VBS nonextractable, and BF nonextractable.

View larger version (28K): [in a new window]   Fig. 2. TLC analysis of methanol extractable 14C. Disappearance of metolachlor over time (a) with curves representing nonlinear regression fits of the first-order equation. Symbols for (a) are • VBS metolachlor and BF metolachlor. Appearance of non-polar and polar metabolites are shown in (b). Symbols for (b) are • VBS non-polar, BF non-polar, VBS polar, and BF polar.