机译:支持大平原蜜蜂的保护区计划的过去作用和未来展望
US Geol Survey, Northern Prairie Wildlife Res Ctr, Jamestown, ND 58401 USA;
Univ North Dakota, Dept Earth Syst Sci & Policy, Grand Forks, ND 58202 USA;
US Geol Survey, Earth Resources Observat & Sci Ctr, Sioux Falls, SD 57198 USAUSDA, Farm Serv Agcy, Washington, DC 20250 USA;
agriculture policy; farm bill; land-use change; Conservation Reserve Program; pollinator;