| http://www.w3.org/ns/prov#value | - In the 1970s and early 1980s, before the federal Conservation Reserve Program resulted in 1.5 million acres of South Dakota cropland being taken out of production and planted to cover that favors wildlife such as pheasants, the brood count surveys regularly projected pheasant populations of fewer than 5 million birds.The decline this year corresponds with changing land use.
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