Health

U.S. Approves Genetically Modified Alfalfa

The genetically modified crop — developed by Monsanto and Forage Genetics, an alfalfa seed company that is owned by the Land O’Lakes farming and dairy cooperative — contains a gene that makes the plant resistant to the herbicide Roundup. That allows farmers to spray the chemical to kill weeds without hurting the crop.

Alfalfa is grown mostly to make hay fed to dairy cows and horses. More than 20 million acres are grown in the United States; it is the nation’s fourth-largest crop by acreage, behind corn, soybeans and wheat, with a value of about $8 billion. About 1 percent of alfalfa is organic.