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机译:Forbs included in conservation seed mixes exhibit variable blooming detection rates and cost-effectiveness: implications for pollinator habitat design
U.S. Geological Survey, Northern Prairie Wildlife Research Center, 8711 37th Street SE, Jamestown, ND 58401, U.S.A.;
US Department of Agriculture- Farm Production and Conservation Mission Area, Economic and Policy Analysis Division, Washington, DC, U.S.A.;
bees; Conservation Reserve Program; private land conservation programs; seed cost;