After a few rocky quarters, earnings growth is heating up again for Campbell Soup (CPB). On Tuesday, Campbell delivered earnings of 95 cents a share for its fiscal Q1 of 2016 — up 22% from a year earlier and the firm’s biggest gain in three years. In the four quarters prior, profit went from falling 13% to rising 18%. Q1’s sales, however, were down 2% to $2.20 billion, hurt in part by currency headwinds.