Last year, Prime Minister Narendra Modi said India could feed the world. This year, the world’s top rice exporter is instead curbing grain sales, rushing to ease rising food inflation at home as next year’s general election approaches.With the vote less than a year away, Modi’s government is going all out to build up its food stockpiles. Officials say inventories are adequate and have sought to discourage hoarding, but India has still banned rice exports and is preparing to import wheat, despite being the world’s second-largest producer. Modi and...