Walmart is getting into the beef business.The nation’s biggest grocer has contracted with a Texas cattle rancher and other industry-related businesses to provide a steady supply of no-hormone-added Angus beef to 500 of its U.S. stores beginning later this year.The move comes two years after Walmart upgraded its steaks and roasts to higher-quality Angus, part of a broader push to improve the quality of its fresh foods amid intensifying competition in the $840 billion grocery sector.Tyson Foods and Cargill — which has facilities in Cedar Rapids — currently provide Walmart with most of its beef, and will continue to do so.