Though new agricultural enterprises typically demand long hours and physical stamina, many retirees turn to farming as a way to keep active and earn an income — or, like Mr. Noble, to at least supplement Social Security. The White House’s 2013 Economic Report of the President notes that “the average age of U.S. farmers and ranchers has been increasing over time.” One-third of beginning farmers — defined by the federal government as having been in business fewer than 10 years — “are over age 55, indicating that many farmers move into agriculture only after retiring from a different career.”

…She acknowledges that working for a giant multinational corporation was “ego satisfying,” but she finds that life on the farm is “soul satisfying” — and humbling, especially when she must ask for help from more experienced colleagues. “I can tell you this,” she said near her raised beds of asparagus and strawberries. “I wasn’t humble at Cisco. My daughters have said, ‘You are so much nicer now.’ ”