The activity of dehydrogenase (µg TPF produced g-1 day-1 ) followed decreasing trend from before treatment imposition to 3 days after treatment imposition thereafter it showed increasing trend. Sulfonyl urea herbicides had the lower dehydrogenase activity immediately after herbicide application as compared to the other herbicide group’s viz., chloroacetamide, triazolepyramidine, pyramidinethiobenzole and aryloxyphenoxy propionate. Urease activity ( g of NH4 + released g-1 soil 2 hr-1 ), increased from 0 DAT up to 45 DAT and thereafter it decreased. | Rhizosphere enzyme activities as influenced chemical weed management practices in the transplanted rice
