Grand Island Independent: Irrigation is the lifeblood of Nebraska agriculture. But with Nebraska now the nation’s leading irrigation state, a new federal report raises concerns that climate change could have a long-term impact on the state’s groundwater reserves. Last year, Nebraska farmers achieved a total corn production of 1.39 billion bushels. Of that, 960 million bushels were grown on irrigated acres. The average irrigated acre had a yield of 184 bushels, compared to 130 bushels per acre for …