Soil microbial properties in Bt (Bacillus thuringiensis) corn cropping systems

► We determined soil microbial response to Bt corn and deltamethrin insecticide. ► We also determined if growing Bt corn in crop rotation would alter these effects. ► Neither the Bt trait nor the insecticide affected soil microbial properties. ► Bt corn in rotation had better soil microbial quality than Bt corn in monoculture.