Agricultural Pesticide Use Estimates for Selected Watersheds of the Surface Water Trends Project, 1992-2014, National Water Quality Program
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The U.S. Geological Survey (USGS) National Water Quality Program (NWQP) provides an understanding of water-quality conditions; whether conditions are getting better...
美国地质调查局（U.S. Geological Survey, USGS）国家水质计划（National Water Quality Program, NWQP）旨在帮助人们认知当前的水质状况，并研判水质条件是否正在改善……
