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Chemical reactions and fate of the toxins of Bacillus thuringiensis (Bt) in the soil environment are causing increasing concerns due to the large-scale cultivation of transgenic Bt plants. In this study, the effect of ionic strength (0–1 000 mmol kg −1 ) adjusted by NaCl or CaCl 2 on adsorption of Bt toxin by a lateritic red soil, a paddy soil and these soils after chemical removal...
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