In north america "no till farming" has become a widespread practice made possible by genetically modified (gm) crops that can be sprayed with herbicide that kills everything but the gm plant. evaluate the following statements on the role of gm crops on soil conservation issues? they have no effect one way or the other on soil erosion. the herbicides kill beneficial plants and animals and eventually will make the soil sterile. the no till practice dramatically improves soil conservation by providing loose organic matter cover to the soil surface, breaking up wind and runoff, lowering erosion rates. they are a disaster. by killing all plants except the gm organism they expose the soil to increased erosion.