sentences:  Although most grassy and broadleaf plants, including ordinary alfalfa, are killed by Roundup, growers can spray fields of Roundup Ready alfalfa with the glyphosate herbicide and kill the weeds without harming the alfalfa crop.In 2005, after completing a 28-page environmental assessment (EA) the United States Department of Agriculture (USDA) granted Roundup Ready alfalfa (RRA) nonregulated status under Code of Federal Regulations Title 7 Part 340, called, "Introduction of Organisms and Products Altered or Produced Through Genetic Engineering Which Are Plant Pests or Which There Is Reason to Believe Are Plant Pests", which regulates, among other things, the introduction (importation, interstate movement, or release into the environment) of organisms and products altered or produced through genetic engineering that are plant pests or that there is reason to believe are plant pests.Monsanto had to seek deregulation to conduct field trials of RRA, because the RRA contains a promoter sequence derived from the plant pathogen figwort mosaic virus.