National Public Radio: Indian farmer Amarjit Sharma grows wheat and other crops on five acres in the heart of the region known as “the breadbasket of India,” the fertile fields of Punjab. Until four years ago, he was the kind of farmer whom government leaders and agricultural scientists hailed as a model in the developing world. But now, he has gone organic and is part of a quiet but growing rebellion, which could affect the world’s food crisis. Decades ago, when the modern, chemical-reliant …