The Obama administration will seek to allow the unlimited sale of a corn variety genetically engineered by Monsanto Co. to resist drought [...] While the agency’s draft environmental assessment of the modified corn found the crop unlikely to pose a plant pest risk [...] the agency also noted that many corn varieties on the market match Monsanto’s strain in their water use. ”The reduced yield [trait] does not exceed the natural variation observed in regionally-adapted varieties of conventional corn,” the report says, adding that ”Equally comparable varieties produced through conventional breeding techniques are readily available in irrigated corn production regions.”