Ranchers, Navajo Nation chapters and environmental groups on Wednesday sued federal land managers over a plan that would allow almost 10,000 new oil and gas wells in northwest New Mexico. The U.S. Bureau of Land Management last fall approved a plan to guide the use of more than 1.4 million acres in the Farmington area over the next 20 years. The plan covers the San Juan Basin, where there are 18,000 operating oil and gas wells. The basin, which is mostly in New Mexico, currently produces 10 percent of the nation's natural gas. In the lawsuit, filed in U.S. District...