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Impact of Genetically Modified Crops and Their Management on Soil Microbially Mediated Plant Nutrient Transformations

^a Department of Soil, Environmental and Atmospheric Sciences,University of Missouri, Columbia, MO 65211
^b USDA-ARS, University of Missouri, Columbia, MO 65211

View larger version (31K): [in a new window]   Fig. 1. Potential nontargeted direct and indirect effects of transgenic crops on microbially mediated soil nutrient transformations.

View larger version (28K): [in a new window]   Fig. 2. A flow diagram illustrating the possible indirect effects of transgenic Bt corn (i.e., corn engineered to express Bacillus thuringiensis toxin) residues on soil nutrient transformations.

View larger version (52K): [in a new window]   Fig. 3. Processes influencing soil P availability in the soil rhizosphere (adapted from Ryan et al., 2001).