A radical new approach to raising cattle helped fourth-generation rancher Cory Carman save her family’s land. Twelve years ago, Carman Ranch, a 3,100-acre cattle-raising operation in Wallowa Valley, Oregon, was struggling; the grass, fast receding, barely supported the 300-animal herd. So Cory Carman convinced her family to turn to holistic ranching, a risky approach that involved eliminating chemical fertilizer, minimizing irrigation, and moving cattle methodically—keeping them in one place just long enough to munch the…