Associated Press: On one side of the gravel road are hundreds of acres of corn. On the other is a much different crop that scientists hope will enable farmers to rebuild sinking islands in California’s Sacramento-San Joaquin Delta, combat global warming and make a profit at the same time. The alternate field is full of tules and cattails that are being grown by the U.S. Geological Survey on about 15 acres on Twitchell Island, about 5.7 square miles of rich but fragile land south of …